1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/dss/dsi.c
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 */
8
9 #define DSS_SUBSYS_NAME "DSI"
10
11 #include <linux/kernel.h>
12 #include <linux/io.h>
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/err.h>
16 #include <linux/interrupt.h>
17 #include <linux/delay.h>
18 #include <linux/mutex.h>
19 #include <linux/module.h>
20 #include <linux/semaphore.h>
21 #include <linux/seq_file.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/wait.h>
25 #include <linux/workqueue.h>
26 #include <linux/sched.h>
27 #include <linux/slab.h>
28 #include <linux/debugfs.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/of.h>
31 #include <linux/of_platform.h>
32 #include <linux/component.h>
33
34 #include <video/omapfb_dss.h>
35 #include <video/mipi_display.h>
36
37 #include "dss.h"
38 #include "dss_features.h"
39
40 #define DSI_CATCH_MISSING_TE
41
42 struct dsi_reg { u16 module; u16 idx; };
43
44 #define DSI_REG(mod, idx) ((const struct dsi_reg) { mod, idx })
45
46 /* DSI Protocol Engine */
47
48 #define DSI_PROTO 0
49 #define DSI_PROTO_SZ 0x200
50
51 #define DSI_REVISION DSI_REG(DSI_PROTO, 0x0000)
52 #define DSI_SYSCONFIG DSI_REG(DSI_PROTO, 0x0010)
53 #define DSI_SYSSTATUS DSI_REG(DSI_PROTO, 0x0014)
54 #define DSI_IRQSTATUS DSI_REG(DSI_PROTO, 0x0018)
55 #define DSI_IRQENABLE DSI_REG(DSI_PROTO, 0x001C)
56 #define DSI_CTRL DSI_REG(DSI_PROTO, 0x0040)
57 #define DSI_GNQ DSI_REG(DSI_PROTO, 0x0044)
58 #define DSI_COMPLEXIO_CFG1 DSI_REG(DSI_PROTO, 0x0048)
59 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(DSI_PROTO, 0x004C)
60 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(DSI_PROTO, 0x0050)
61 #define DSI_CLK_CTRL DSI_REG(DSI_PROTO, 0x0054)
62 #define DSI_TIMING1 DSI_REG(DSI_PROTO, 0x0058)
63 #define DSI_TIMING2 DSI_REG(DSI_PROTO, 0x005C)
64 #define DSI_VM_TIMING1 DSI_REG(DSI_PROTO, 0x0060)
65 #define DSI_VM_TIMING2 DSI_REG(DSI_PROTO, 0x0064)
66 #define DSI_VM_TIMING3 DSI_REG(DSI_PROTO, 0x0068)
67 #define DSI_CLK_TIMING DSI_REG(DSI_PROTO, 0x006C)
68 #define DSI_TX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0070)
69 #define DSI_RX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0074)
70 #define DSI_COMPLEXIO_CFG2 DSI_REG(DSI_PROTO, 0x0078)
71 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(DSI_PROTO, 0x007C)
72 #define DSI_VM_TIMING4 DSI_REG(DSI_PROTO, 0x0080)
73 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(DSI_PROTO, 0x0084)
74 #define DSI_VM_TIMING5 DSI_REG(DSI_PROTO, 0x0088)
75 #define DSI_VM_TIMING6 DSI_REG(DSI_PROTO, 0x008C)
76 #define DSI_VM_TIMING7 DSI_REG(DSI_PROTO, 0x0090)
77 #define DSI_STOPCLK_TIMING DSI_REG(DSI_PROTO, 0x0094)
78 #define DSI_VC_CTRL(n) DSI_REG(DSI_PROTO, 0x0100 + (n * 0x20))
79 #define DSI_VC_TE(n) DSI_REG(DSI_PROTO, 0x0104 + (n * 0x20))
80 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0108 + (n * 0x20))
81 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(DSI_PROTO, 0x010C + (n * 0x20))
82 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0110 + (n * 0x20))
83 #define DSI_VC_IRQSTATUS(n) DSI_REG(DSI_PROTO, 0x0118 + (n * 0x20))
84 #define DSI_VC_IRQENABLE(n) DSI_REG(DSI_PROTO, 0x011C + (n * 0x20))
85
86 /* DSIPHY_SCP */
87
88 #define DSI_PHY 1
89 #define DSI_PHY_OFFSET 0x200
90 #define DSI_PHY_SZ 0x40
91
92 #define DSI_DSIPHY_CFG0 DSI_REG(DSI_PHY, 0x0000)
93 #define DSI_DSIPHY_CFG1 DSI_REG(DSI_PHY, 0x0004)
94 #define DSI_DSIPHY_CFG2 DSI_REG(DSI_PHY, 0x0008)
95 #define DSI_DSIPHY_CFG5 DSI_REG(DSI_PHY, 0x0014)
96 #define DSI_DSIPHY_CFG10 DSI_REG(DSI_PHY, 0x0028)
97
98 /* DSI_PLL_CTRL_SCP */
99
100 #define DSI_PLL 2
101 #define DSI_PLL_OFFSET 0x300
102 #define DSI_PLL_SZ 0x20
103
104 #define DSI_PLL_CONTROL DSI_REG(DSI_PLL, 0x0000)
105 #define DSI_PLL_STATUS DSI_REG(DSI_PLL, 0x0004)
106 #define DSI_PLL_GO DSI_REG(DSI_PLL, 0x0008)
107 #define DSI_PLL_CONFIGURATION1 DSI_REG(DSI_PLL, 0x000C)
108 #define DSI_PLL_CONFIGURATION2 DSI_REG(DSI_PLL, 0x0010)
109
110 #define REG_GET(dsidev, idx, start, end) \
111 FLD_GET(dsi_read_reg(dsidev, idx), start, end)
112
113 #define REG_FLD_MOD(dsidev, idx, val, start, end) \
114 dsi_write_reg(dsidev, idx, FLD_MOD(dsi_read_reg(dsidev, idx), val, start, end))
115
116 /* Global interrupts */
117 #define DSI_IRQ_VC0 (1 << 0)
118 #define DSI_IRQ_VC1 (1 << 1)
119 #define DSI_IRQ_VC2 (1 << 2)
120 #define DSI_IRQ_VC3 (1 << 3)
121 #define DSI_IRQ_WAKEUP (1 << 4)
122 #define DSI_IRQ_RESYNC (1 << 5)
123 #define DSI_IRQ_PLL_LOCK (1 << 7)
124 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
125 #define DSI_IRQ_PLL_RECALL (1 << 9)
126 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
127 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
128 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
129 #define DSI_IRQ_TE_TRIGGER (1 << 16)
130 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
131 #define DSI_IRQ_SYNC_LOST (1 << 18)
132 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
133 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
134 #define DSI_IRQ_ERROR_MASK \
135 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
136 DSI_IRQ_TA_TIMEOUT)
137 #define DSI_IRQ_CHANNEL_MASK 0xf
138
139 /* Virtual channel interrupts */
140 #define DSI_VC_IRQ_CS (1 << 0)
141 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
142 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
143 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
144 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
145 #define DSI_VC_IRQ_BTA (1 << 5)
146 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
147 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
148 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
149 #define DSI_VC_IRQ_ERROR_MASK \
150 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
151 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
152 DSI_VC_IRQ_FIFO_TX_UDF)
153
154 /* ComplexIO interrupts */
155 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
156 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
157 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
158 #define DSI_CIO_IRQ_ERRSYNCESC4 (1 << 3)
159 #define DSI_CIO_IRQ_ERRSYNCESC5 (1 << 4)
160 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
161 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
162 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
163 #define DSI_CIO_IRQ_ERRESC4 (1 << 8)
164 #define DSI_CIO_IRQ_ERRESC5 (1 << 9)
165 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
166 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
167 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
168 #define DSI_CIO_IRQ_ERRCONTROL4 (1 << 13)
169 #define DSI_CIO_IRQ_ERRCONTROL5 (1 << 14)
170 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
171 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
172 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
173 #define DSI_CIO_IRQ_STATEULPS4 (1 << 18)
174 #define DSI_CIO_IRQ_STATEULPS5 (1 << 19)
175 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
176 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
177 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
178 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
179 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
180 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
181 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_4 (1 << 26)
182 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_4 (1 << 27)
183 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_5 (1 << 28)
184 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_5 (1 << 29)
185 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
186 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
187 #define DSI_CIO_IRQ_ERROR_MASK \
188 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
189 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRSYNCESC4 | \
190 DSI_CIO_IRQ_ERRSYNCESC5 | \
191 DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
192 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRESC4 | \
193 DSI_CIO_IRQ_ERRESC5 | \
194 DSI_CIO_IRQ_ERRCONTROL1 | DSI_CIO_IRQ_ERRCONTROL2 | \
195 DSI_CIO_IRQ_ERRCONTROL3 | DSI_CIO_IRQ_ERRCONTROL4 | \
196 DSI_CIO_IRQ_ERRCONTROL5 | \
197 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
198 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
199 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3 | \
200 DSI_CIO_IRQ_ERRCONTENTIONLP0_4 | DSI_CIO_IRQ_ERRCONTENTIONLP1_4 | \
201 DSI_CIO_IRQ_ERRCONTENTIONLP0_5 | DSI_CIO_IRQ_ERRCONTENTIONLP1_5)
202
203 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
204
205 static int dsi_display_init_dispc(struct platform_device *dsidev,
206 struct omap_overlay_manager *mgr);
207 static void dsi_display_uninit_dispc(struct platform_device *dsidev,
208 struct omap_overlay_manager *mgr);
209
210 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel);
211
212 /* DSI PLL HSDIV indices */
213 #define HSDIV_DISPC 0
214 #define HSDIV_DSI 1
215
216 #define DSI_MAX_NR_ISRS 2
217 #define DSI_MAX_NR_LANES 5
218
219 enum dsi_lane_function {
220 DSI_LANE_UNUSED = 0,
221 DSI_LANE_CLK,
222 DSI_LANE_DATA1,
223 DSI_LANE_DATA2,
224 DSI_LANE_DATA3,
225 DSI_LANE_DATA4,
226 };
227
228 struct dsi_lane_config {
229 enum dsi_lane_function function;
230 u8 polarity;
231 };
232
233 struct dsi_isr_data {
234 omap_dsi_isr_t isr;
235 void *arg;
236 u32 mask;
237 };
238
239 enum fifo_size {
240 DSI_FIFO_SIZE_0 = 0,
241 DSI_FIFO_SIZE_32 = 1,
242 DSI_FIFO_SIZE_64 = 2,
243 DSI_FIFO_SIZE_96 = 3,
244 DSI_FIFO_SIZE_128 = 4,
245 };
246
247 enum dsi_vc_source {
248 DSI_VC_SOURCE_L4 = 0,
249 DSI_VC_SOURCE_VP,
250 };
251
252 struct dsi_irq_stats {
253 unsigned long last_reset;
254 unsigned irq_count;
255 unsigned dsi_irqs[32];
256 unsigned vc_irqs[4][32];
257 unsigned cio_irqs[32];
258 };
259
260 struct dsi_isr_tables {
261 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
262 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
263 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
264 };
265
266 struct dsi_clk_calc_ctx {
267 struct platform_device *dsidev;
268 struct dss_pll *pll;
269
270 /* inputs */
271
272 const struct omap_dss_dsi_config *config;
273
274 unsigned long req_pck_min, req_pck_nom, req_pck_max;
275
276 /* outputs */
277
278 struct dss_pll_clock_info dsi_cinfo;
279 struct dispc_clock_info dispc_cinfo;
280
281 struct omap_video_timings dispc_vm;
282 struct omap_dss_dsi_videomode_timings dsi_vm;
283 };
284
285 struct dsi_lp_clock_info {
286 unsigned long lp_clk;
287 u16 lp_clk_div;
288 };
289
290 struct dsi_data {
291 struct platform_device *pdev;
292 void __iomem *proto_base;
293 void __iomem *phy_base;
294 void __iomem *pll_base;
295
296 int module_id;
297
298 int irq;
299
300 bool is_enabled;
301
302 struct clk *dss_clk;
303
304 struct dispc_clock_info user_dispc_cinfo;
305 struct dss_pll_clock_info user_dsi_cinfo;
306
307 struct dsi_lp_clock_info user_lp_cinfo;
308 struct dsi_lp_clock_info current_lp_cinfo;
309
310 struct dss_pll pll;
311
312 bool vdds_dsi_enabled;
313 struct regulator *vdds_dsi_reg;
314
315 struct {
316 enum dsi_vc_source source;
317 struct omap_dss_device *dssdev;
318 enum fifo_size tx_fifo_size;
319 enum fifo_size rx_fifo_size;
320 int vc_id;
321 } vc[4];
322
323 struct mutex lock;
324 struct semaphore bus_lock;
325
326 spinlock_t irq_lock;
327 struct dsi_isr_tables isr_tables;
328 /* space for a copy used by the interrupt handler */
329 struct dsi_isr_tables isr_tables_copy;
330
331 int update_channel;
332 #ifdef DSI_PERF_MEASURE
333 unsigned update_bytes;
334 #endif
335
336 bool te_enabled;
337 bool ulps_enabled;
338
339 void (*framedone_callback)(int, void *);
340 void *framedone_data;
341
342 struct delayed_work framedone_timeout_work;
343
344 #ifdef DSI_CATCH_MISSING_TE
345 struct timer_list te_timer;
346 #endif
347
348 unsigned long cache_req_pck;
349 unsigned long cache_clk_freq;
350 struct dss_pll_clock_info cache_cinfo;
351
352 u32 errors;
353 spinlock_t errors_lock;
354 #ifdef DSI_PERF_MEASURE
355 ktime_t perf_setup_time;
356 ktime_t perf_start_time;
357 #endif
358 int debug_read;
359 int debug_write;
360
361 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
362 spinlock_t irq_stats_lock;
363 struct dsi_irq_stats irq_stats;
364 #endif
365
366 unsigned num_lanes_supported;
367 unsigned line_buffer_size;
368
369 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
370 unsigned num_lanes_used;
371
372 unsigned scp_clk_refcount;
373
374 struct dss_lcd_mgr_config mgr_config;
375 struct omap_video_timings timings;
376 enum omap_dss_dsi_pixel_format pix_fmt;
377 enum omap_dss_dsi_mode mode;
378 struct omap_dss_dsi_videomode_timings vm_timings;
379
380 struct omap_dss_device output;
381 };
382
383 struct dsi_packet_sent_handler_data {
384 struct platform_device *dsidev;
385 struct completion *completion;
386 };
387
388 struct dsi_module_id_data {
389 u32 address;
390 int id;
391 };
392
393 static const struct of_device_id dsi_of_match[];
394
395 #ifdef DSI_PERF_MEASURE
396 static bool dsi_perf;
397 module_param(dsi_perf, bool, 0644);
398 #endif
399
dsi_get_dsidrv_data(struct platform_device * dsidev)400 static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dsidev)
401 {
402 return platform_get_drvdata(dsidev);
403 }
404
dsi_get_dsidev_from_dssdev(struct omap_dss_device * dssdev)405 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev)
406 {
407 return to_platform_device(dssdev->dev);
408 }
409
dsi_get_dsidev_from_id(int module)410 static struct platform_device *dsi_get_dsidev_from_id(int module)
411 {
412 struct omap_dss_device *out;
413 enum omap_dss_output_id id;
414
415 switch (module) {
416 case 0:
417 id = OMAP_DSS_OUTPUT_DSI1;
418 break;
419 case 1:
420 id = OMAP_DSS_OUTPUT_DSI2;
421 break;
422 default:
423 return NULL;
424 }
425
426 out = omap_dss_get_output(id);
427
428 return out ? to_platform_device(out->dev) : NULL;
429 }
430
dsi_write_reg(struct platform_device * dsidev,const struct dsi_reg idx,u32 val)431 static inline void dsi_write_reg(struct platform_device *dsidev,
432 const struct dsi_reg idx, u32 val)
433 {
434 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
435 void __iomem *base;
436
437 switch(idx.module) {
438 case DSI_PROTO: base = dsi->proto_base; break;
439 case DSI_PHY: base = dsi->phy_base; break;
440 case DSI_PLL: base = dsi->pll_base; break;
441 default: return;
442 }
443
444 __raw_writel(val, base + idx.idx);
445 }
446
dsi_read_reg(struct platform_device * dsidev,const struct dsi_reg idx)447 static inline u32 dsi_read_reg(struct platform_device *dsidev,
448 const struct dsi_reg idx)
449 {
450 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
451 void __iomem *base;
452
453 switch(idx.module) {
454 case DSI_PROTO: base = dsi->proto_base; break;
455 case DSI_PHY: base = dsi->phy_base; break;
456 case DSI_PLL: base = dsi->pll_base; break;
457 default: return 0;
458 }
459
460 return __raw_readl(base + idx.idx);
461 }
462
dsi_bus_lock(struct omap_dss_device * dssdev)463 static void dsi_bus_lock(struct omap_dss_device *dssdev)
464 {
465 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
466 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
467
468 down(&dsi->bus_lock);
469 }
470
dsi_bus_unlock(struct omap_dss_device * dssdev)471 static void dsi_bus_unlock(struct omap_dss_device *dssdev)
472 {
473 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
474 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
475
476 up(&dsi->bus_lock);
477 }
478
dsi_bus_is_locked(struct platform_device * dsidev)479 static bool dsi_bus_is_locked(struct platform_device *dsidev)
480 {
481 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
482
483 return dsi->bus_lock.count == 0;
484 }
485
dsi_completion_handler(void * data,u32 mask)486 static void dsi_completion_handler(void *data, u32 mask)
487 {
488 complete((struct completion *)data);
489 }
490
wait_for_bit_change(struct platform_device * dsidev,const struct dsi_reg idx,int bitnum,int value)491 static inline int wait_for_bit_change(struct platform_device *dsidev,
492 const struct dsi_reg idx, int bitnum, int value)
493 {
494 unsigned long timeout;
495 ktime_t wait;
496 int t;
497
498 /* first busyloop to see if the bit changes right away */
499 t = 100;
500 while (t-- > 0) {
501 if (REG_GET(dsidev, idx, bitnum, bitnum) == value)
502 return value;
503 }
504
505 /* then loop for 500ms, sleeping for 1ms in between */
506 timeout = jiffies + msecs_to_jiffies(500);
507 while (time_before(jiffies, timeout)) {
508 if (REG_GET(dsidev, idx, bitnum, bitnum) == value)
509 return value;
510
511 wait = ns_to_ktime(1000 * 1000);
512 set_current_state(TASK_UNINTERRUPTIBLE);
513 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
514 }
515
516 return !value;
517 }
518
dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)519 u8 dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)
520 {
521 switch (fmt) {
522 case OMAP_DSS_DSI_FMT_RGB888:
523 case OMAP_DSS_DSI_FMT_RGB666:
524 return 24;
525 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
526 return 18;
527 case OMAP_DSS_DSI_FMT_RGB565:
528 return 16;
529 default:
530 BUG();
531 return 0;
532 }
533 }
534
535 #ifdef DSI_PERF_MEASURE
dsi_perf_mark_setup(struct platform_device * dsidev)536 static void dsi_perf_mark_setup(struct platform_device *dsidev)
537 {
538 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
539 dsi->perf_setup_time = ktime_get();
540 }
541
dsi_perf_mark_start(struct platform_device * dsidev)542 static void dsi_perf_mark_start(struct platform_device *dsidev)
543 {
544 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
545 dsi->perf_start_time = ktime_get();
546 }
547
dsi_perf_show(struct platform_device * dsidev,const char * name)548 static void dsi_perf_show(struct platform_device *dsidev, const char *name)
549 {
550 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
551 ktime_t t, setup_time, trans_time;
552 u32 total_bytes;
553 u32 setup_us, trans_us, total_us;
554
555 if (!dsi_perf)
556 return;
557
558 t = ktime_get();
559
560 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time);
561 setup_us = (u32)ktime_to_us(setup_time);
562 if (setup_us == 0)
563 setup_us = 1;
564
565 trans_time = ktime_sub(t, dsi->perf_start_time);
566 trans_us = (u32)ktime_to_us(trans_time);
567 if (trans_us == 0)
568 trans_us = 1;
569
570 total_us = setup_us + trans_us;
571
572 total_bytes = dsi->update_bytes;
573
574 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
575 "%u bytes, %u kbytes/sec\n",
576 name,
577 setup_us,
578 trans_us,
579 total_us,
580 1000*1000 / total_us,
581 total_bytes,
582 total_bytes * 1000 / total_us);
583 }
584 #else
dsi_perf_mark_setup(struct platform_device * dsidev)585 static inline void dsi_perf_mark_setup(struct platform_device *dsidev)
586 {
587 }
588
dsi_perf_mark_start(struct platform_device * dsidev)589 static inline void dsi_perf_mark_start(struct platform_device *dsidev)
590 {
591 }
592
dsi_perf_show(struct platform_device * dsidev,const char * name)593 static inline void dsi_perf_show(struct platform_device *dsidev,
594 const char *name)
595 {
596 }
597 #endif
598
599 static int verbose_irq;
600
print_irq_status(u32 status)601 static void print_irq_status(u32 status)
602 {
603 if (status == 0)
604 return;
605
606 if (!verbose_irq && (status & ~DSI_IRQ_CHANNEL_MASK) == 0)
607 return;
608
609 #define PIS(x) (status & DSI_IRQ_##x) ? (#x " ") : ""
610
611 pr_debug("DSI IRQ: 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
612 status,
613 verbose_irq ? PIS(VC0) : "",
614 verbose_irq ? PIS(VC1) : "",
615 verbose_irq ? PIS(VC2) : "",
616 verbose_irq ? PIS(VC3) : "",
617 PIS(WAKEUP),
618 PIS(RESYNC),
619 PIS(PLL_LOCK),
620 PIS(PLL_UNLOCK),
621 PIS(PLL_RECALL),
622 PIS(COMPLEXIO_ERR),
623 PIS(HS_TX_TIMEOUT),
624 PIS(LP_RX_TIMEOUT),
625 PIS(TE_TRIGGER),
626 PIS(ACK_TRIGGER),
627 PIS(SYNC_LOST),
628 PIS(LDO_POWER_GOOD),
629 PIS(TA_TIMEOUT));
630 #undef PIS
631 }
632
print_irq_status_vc(int channel,u32 status)633 static void print_irq_status_vc(int channel, u32 status)
634 {
635 if (status == 0)
636 return;
637
638 if (!verbose_irq && (status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
639 return;
640
641 #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : ""
642
643 pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n",
644 channel,
645 status,
646 PIS(CS),
647 PIS(ECC_CORR),
648 PIS(ECC_NO_CORR),
649 verbose_irq ? PIS(PACKET_SENT) : "",
650 PIS(BTA),
651 PIS(FIFO_TX_OVF),
652 PIS(FIFO_RX_OVF),
653 PIS(FIFO_TX_UDF),
654 PIS(PP_BUSY_CHANGE));
655 #undef PIS
656 }
657
print_irq_status_cio(u32 status)658 static void print_irq_status_cio(u32 status)
659 {
660 if (status == 0)
661 return;
662
663 #define PIS(x) (status & DSI_CIO_IRQ_##x) ? (#x " ") : ""
664
665 pr_debug("DSI CIO IRQ 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
666 status,
667 PIS(ERRSYNCESC1),
668 PIS(ERRSYNCESC2),
669 PIS(ERRSYNCESC3),
670 PIS(ERRESC1),
671 PIS(ERRESC2),
672 PIS(ERRESC3),
673 PIS(ERRCONTROL1),
674 PIS(ERRCONTROL2),
675 PIS(ERRCONTROL3),
676 PIS(STATEULPS1),
677 PIS(STATEULPS2),
678 PIS(STATEULPS3),
679 PIS(ERRCONTENTIONLP0_1),
680 PIS(ERRCONTENTIONLP1_1),
681 PIS(ERRCONTENTIONLP0_2),
682 PIS(ERRCONTENTIONLP1_2),
683 PIS(ERRCONTENTIONLP0_3),
684 PIS(ERRCONTENTIONLP1_3),
685 PIS(ULPSACTIVENOT_ALL0),
686 PIS(ULPSACTIVENOT_ALL1));
687 #undef PIS
688 }
689
690 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_collect_irq_stats(struct platform_device * dsidev,u32 irqstatus,u32 * vcstatus,u32 ciostatus)691 static void dsi_collect_irq_stats(struct platform_device *dsidev, u32 irqstatus,
692 u32 *vcstatus, u32 ciostatus)
693 {
694 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
695 int i;
696
697 spin_lock(&dsi->irq_stats_lock);
698
699 dsi->irq_stats.irq_count++;
700 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs);
701
702 for (i = 0; i < 4; ++i)
703 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]);
704
705 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs);
706
707 spin_unlock(&dsi->irq_stats_lock);
708 }
709 #else
710 #define dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus)
711 #endif
712
713 static int debug_irq;
714
dsi_handle_irq_errors(struct platform_device * dsidev,u32 irqstatus,u32 * vcstatus,u32 ciostatus)715 static void dsi_handle_irq_errors(struct platform_device *dsidev, u32 irqstatus,
716 u32 *vcstatus, u32 ciostatus)
717 {
718 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
719 int i;
720
721 if (irqstatus & DSI_IRQ_ERROR_MASK) {
722 DSSERR("DSI error, irqstatus %x\n", irqstatus);
723 print_irq_status(irqstatus);
724 spin_lock(&dsi->errors_lock);
725 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK;
726 spin_unlock(&dsi->errors_lock);
727 } else if (debug_irq) {
728 print_irq_status(irqstatus);
729 }
730
731 for (i = 0; i < 4; ++i) {
732 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
733 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
734 i, vcstatus[i]);
735 print_irq_status_vc(i, vcstatus[i]);
736 } else if (debug_irq) {
737 print_irq_status_vc(i, vcstatus[i]);
738 }
739 }
740
741 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
742 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
743 print_irq_status_cio(ciostatus);
744 } else if (debug_irq) {
745 print_irq_status_cio(ciostatus);
746 }
747 }
748
dsi_call_isrs(struct dsi_isr_data * isr_array,unsigned isr_array_size,u32 irqstatus)749 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
750 unsigned isr_array_size, u32 irqstatus)
751 {
752 struct dsi_isr_data *isr_data;
753 int i;
754
755 for (i = 0; i < isr_array_size; i++) {
756 isr_data = &isr_array[i];
757 if (isr_data->isr && isr_data->mask & irqstatus)
758 isr_data->isr(isr_data->arg, irqstatus);
759 }
760 }
761
dsi_handle_isrs(struct dsi_isr_tables * isr_tables,u32 irqstatus,u32 * vcstatus,u32 ciostatus)762 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
763 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
764 {
765 int i;
766
767 dsi_call_isrs(isr_tables->isr_table,
768 ARRAY_SIZE(isr_tables->isr_table),
769 irqstatus);
770
771 for (i = 0; i < 4; ++i) {
772 if (vcstatus[i] == 0)
773 continue;
774 dsi_call_isrs(isr_tables->isr_table_vc[i],
775 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
776 vcstatus[i]);
777 }
778
779 if (ciostatus != 0)
780 dsi_call_isrs(isr_tables->isr_table_cio,
781 ARRAY_SIZE(isr_tables->isr_table_cio),
782 ciostatus);
783 }
784
omap_dsi_irq_handler(int irq,void * arg)785 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
786 {
787 struct platform_device *dsidev;
788 struct dsi_data *dsi;
789 u32 irqstatus, vcstatus[4], ciostatus;
790 int i;
791
792 dsidev = (struct platform_device *) arg;
793 dsi = dsi_get_dsidrv_data(dsidev);
794
795 if (!dsi->is_enabled)
796 return IRQ_NONE;
797
798 spin_lock(&dsi->irq_lock);
799
800 irqstatus = dsi_read_reg(dsidev, DSI_IRQSTATUS);
801
802 /* IRQ is not for us */
803 if (!irqstatus) {
804 spin_unlock(&dsi->irq_lock);
805 return IRQ_NONE;
806 }
807
808 dsi_write_reg(dsidev, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
809 /* flush posted write */
810 dsi_read_reg(dsidev, DSI_IRQSTATUS);
811
812 for (i = 0; i < 4; ++i) {
813 if ((irqstatus & (1 << i)) == 0) {
814 vcstatus[i] = 0;
815 continue;
816 }
817
818 vcstatus[i] = dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
819
820 dsi_write_reg(dsidev, DSI_VC_IRQSTATUS(i), vcstatus[i]);
821 /* flush posted write */
822 dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
823 }
824
825 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
826 ciostatus = dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
827
828 dsi_write_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
829 /* flush posted write */
830 dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
831 } else {
832 ciostatus = 0;
833 }
834
835 #ifdef DSI_CATCH_MISSING_TE
836 if (irqstatus & DSI_IRQ_TE_TRIGGER)
837 del_timer(&dsi->te_timer);
838 #endif
839
840 /* make a copy and unlock, so that isrs can unregister
841 * themselves */
842 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables,
843 sizeof(dsi->isr_tables));
844
845 spin_unlock(&dsi->irq_lock);
846
847 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus);
848
849 dsi_handle_irq_errors(dsidev, irqstatus, vcstatus, ciostatus);
850
851 dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus);
852
853 return IRQ_HANDLED;
854 }
855
856 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_configure_irqs(struct platform_device * dsidev,struct dsi_isr_data * isr_array,unsigned isr_array_size,u32 default_mask,const struct dsi_reg enable_reg,const struct dsi_reg status_reg)857 static void _omap_dsi_configure_irqs(struct platform_device *dsidev,
858 struct dsi_isr_data *isr_array,
859 unsigned isr_array_size, u32 default_mask,
860 const struct dsi_reg enable_reg,
861 const struct dsi_reg status_reg)
862 {
863 struct dsi_isr_data *isr_data;
864 u32 mask;
865 u32 old_mask;
866 int i;
867
868 mask = default_mask;
869
870 for (i = 0; i < isr_array_size; i++) {
871 isr_data = &isr_array[i];
872
873 if (isr_data->isr == NULL)
874 continue;
875
876 mask |= isr_data->mask;
877 }
878
879 old_mask = dsi_read_reg(dsidev, enable_reg);
880 /* clear the irqstatus for newly enabled irqs */
881 dsi_write_reg(dsidev, status_reg, (mask ^ old_mask) & mask);
882 dsi_write_reg(dsidev, enable_reg, mask);
883
884 /* flush posted writes */
885 dsi_read_reg(dsidev, enable_reg);
886 dsi_read_reg(dsidev, status_reg);
887 }
888
889 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs(struct platform_device * dsidev)890 static void _omap_dsi_set_irqs(struct platform_device *dsidev)
891 {
892 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
893 u32 mask = DSI_IRQ_ERROR_MASK;
894 #ifdef DSI_CATCH_MISSING_TE
895 mask |= DSI_IRQ_TE_TRIGGER;
896 #endif
897 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table,
898 ARRAY_SIZE(dsi->isr_tables.isr_table), mask,
899 DSI_IRQENABLE, DSI_IRQSTATUS);
900 }
901
902 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_vc(struct platform_device * dsidev,int vc)903 static void _omap_dsi_set_irqs_vc(struct platform_device *dsidev, int vc)
904 {
905 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
906
907 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_vc[vc],
908 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]),
909 DSI_VC_IRQ_ERROR_MASK,
910 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
911 }
912
913 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_cio(struct platform_device * dsidev)914 static void _omap_dsi_set_irqs_cio(struct platform_device *dsidev)
915 {
916 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
917
918 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_cio,
919 ARRAY_SIZE(dsi->isr_tables.isr_table_cio),
920 DSI_CIO_IRQ_ERROR_MASK,
921 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
922 }
923
_dsi_initialize_irq(struct platform_device * dsidev)924 static void _dsi_initialize_irq(struct platform_device *dsidev)
925 {
926 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
927 unsigned long flags;
928 int vc;
929
930 spin_lock_irqsave(&dsi->irq_lock, flags);
931
932 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables));
933
934 _omap_dsi_set_irqs(dsidev);
935 for (vc = 0; vc < 4; ++vc)
936 _omap_dsi_set_irqs_vc(dsidev, vc);
937 _omap_dsi_set_irqs_cio(dsidev);
938
939 spin_unlock_irqrestore(&dsi->irq_lock, flags);
940 }
941
_dsi_register_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned isr_array_size)942 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
943 struct dsi_isr_data *isr_array, unsigned isr_array_size)
944 {
945 struct dsi_isr_data *isr_data;
946 int free_idx;
947 int i;
948
949 BUG_ON(isr == NULL);
950
951 /* check for duplicate entry and find a free slot */
952 free_idx = -1;
953 for (i = 0; i < isr_array_size; i++) {
954 isr_data = &isr_array[i];
955
956 if (isr_data->isr == isr && isr_data->arg == arg &&
957 isr_data->mask == mask) {
958 return -EINVAL;
959 }
960
961 if (isr_data->isr == NULL && free_idx == -1)
962 free_idx = i;
963 }
964
965 if (free_idx == -1)
966 return -EBUSY;
967
968 isr_data = &isr_array[free_idx];
969 isr_data->isr = isr;
970 isr_data->arg = arg;
971 isr_data->mask = mask;
972
973 return 0;
974 }
975
_dsi_unregister_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned isr_array_size)976 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
977 struct dsi_isr_data *isr_array, unsigned isr_array_size)
978 {
979 struct dsi_isr_data *isr_data;
980 int i;
981
982 for (i = 0; i < isr_array_size; i++) {
983 isr_data = &isr_array[i];
984 if (isr_data->isr != isr || isr_data->arg != arg ||
985 isr_data->mask != mask)
986 continue;
987
988 isr_data->isr = NULL;
989 isr_data->arg = NULL;
990 isr_data->mask = 0;
991
992 return 0;
993 }
994
995 return -EINVAL;
996 }
997
dsi_register_isr(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)998 static int dsi_register_isr(struct platform_device *dsidev, omap_dsi_isr_t isr,
999 void *arg, u32 mask)
1000 {
1001 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1002 unsigned long flags;
1003 int r;
1004
1005 spin_lock_irqsave(&dsi->irq_lock, flags);
1006
1007 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1008 ARRAY_SIZE(dsi->isr_tables.isr_table));
1009
1010 if (r == 0)
1011 _omap_dsi_set_irqs(dsidev);
1012
1013 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1014
1015 return r;
1016 }
1017
dsi_unregister_isr(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1018 static int dsi_unregister_isr(struct platform_device *dsidev,
1019 omap_dsi_isr_t isr, void *arg, u32 mask)
1020 {
1021 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1022 unsigned long flags;
1023 int r;
1024
1025 spin_lock_irqsave(&dsi->irq_lock, flags);
1026
1027 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1028 ARRAY_SIZE(dsi->isr_tables.isr_table));
1029
1030 if (r == 0)
1031 _omap_dsi_set_irqs(dsidev);
1032
1033 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1034
1035 return r;
1036 }
1037
dsi_register_isr_vc(struct platform_device * dsidev,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1038 static int dsi_register_isr_vc(struct platform_device *dsidev, int channel,
1039 omap_dsi_isr_t isr, void *arg, u32 mask)
1040 {
1041 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1042 unsigned long flags;
1043 int r;
1044
1045 spin_lock_irqsave(&dsi->irq_lock, flags);
1046
1047 r = _dsi_register_isr(isr, arg, mask,
1048 dsi->isr_tables.isr_table_vc[channel],
1049 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1050
1051 if (r == 0)
1052 _omap_dsi_set_irqs_vc(dsidev, channel);
1053
1054 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1055
1056 return r;
1057 }
1058
dsi_unregister_isr_vc(struct platform_device * dsidev,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1059 static int dsi_unregister_isr_vc(struct platform_device *dsidev, int channel,
1060 omap_dsi_isr_t isr, void *arg, u32 mask)
1061 {
1062 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1063 unsigned long flags;
1064 int r;
1065
1066 spin_lock_irqsave(&dsi->irq_lock, flags);
1067
1068 r = _dsi_unregister_isr(isr, arg, mask,
1069 dsi->isr_tables.isr_table_vc[channel],
1070 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1071
1072 if (r == 0)
1073 _omap_dsi_set_irqs_vc(dsidev, channel);
1074
1075 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1076
1077 return r;
1078 }
1079
dsi_register_isr_cio(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1080 static int dsi_register_isr_cio(struct platform_device *dsidev,
1081 omap_dsi_isr_t isr, void *arg, u32 mask)
1082 {
1083 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1084 unsigned long flags;
1085 int r;
1086
1087 spin_lock_irqsave(&dsi->irq_lock, flags);
1088
1089 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1090 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1091
1092 if (r == 0)
1093 _omap_dsi_set_irqs_cio(dsidev);
1094
1095 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1096
1097 return r;
1098 }
1099
dsi_unregister_isr_cio(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1100 static int dsi_unregister_isr_cio(struct platform_device *dsidev,
1101 omap_dsi_isr_t isr, void *arg, u32 mask)
1102 {
1103 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1104 unsigned long flags;
1105 int r;
1106
1107 spin_lock_irqsave(&dsi->irq_lock, flags);
1108
1109 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1110 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1111
1112 if (r == 0)
1113 _omap_dsi_set_irqs_cio(dsidev);
1114
1115 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1116
1117 return r;
1118 }
1119
dsi_get_errors(struct platform_device * dsidev)1120 static u32 dsi_get_errors(struct platform_device *dsidev)
1121 {
1122 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1123 unsigned long flags;
1124 u32 e;
1125 spin_lock_irqsave(&dsi->errors_lock, flags);
1126 e = dsi->errors;
1127 dsi->errors = 0;
1128 spin_unlock_irqrestore(&dsi->errors_lock, flags);
1129 return e;
1130 }
1131
dsi_runtime_get(struct platform_device * dsidev)1132 static int dsi_runtime_get(struct platform_device *dsidev)
1133 {
1134 int r;
1135 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1136
1137 DSSDBG("dsi_runtime_get\n");
1138
1139 r = pm_runtime_resume_and_get(&dsi->pdev->dev);
1140 if (WARN_ON(r < 0))
1141 return r;
1142 return 0;
1143 }
1144
dsi_runtime_put(struct platform_device * dsidev)1145 static void dsi_runtime_put(struct platform_device *dsidev)
1146 {
1147 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1148 int r;
1149
1150 DSSDBG("dsi_runtime_put\n");
1151
1152 r = pm_runtime_put_sync(&dsi->pdev->dev);
1153 WARN_ON(r < 0 && r != -ENOSYS);
1154 }
1155
dsi_regulator_init(struct platform_device * dsidev)1156 static int dsi_regulator_init(struct platform_device *dsidev)
1157 {
1158 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1159 struct regulator *vdds_dsi;
1160
1161 if (dsi->vdds_dsi_reg != NULL)
1162 return 0;
1163
1164 vdds_dsi = devm_regulator_get(&dsi->pdev->dev, "vdd");
1165
1166 if (IS_ERR(vdds_dsi)) {
1167 if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER)
1168 DSSERR("can't get DSI VDD regulator\n");
1169 return PTR_ERR(vdds_dsi);
1170 }
1171
1172 dsi->vdds_dsi_reg = vdds_dsi;
1173
1174 return 0;
1175 }
1176
_dsi_print_reset_status(struct platform_device * dsidev)1177 static void _dsi_print_reset_status(struct platform_device *dsidev)
1178 {
1179 int b0, b1, b2;
1180
1181 /* A dummy read using the SCP interface to any DSIPHY register is
1182 * required after DSIPHY reset to complete the reset of the DSI complex
1183 * I/O. */
1184 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
1185
1186 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) {
1187 b0 = 28;
1188 b1 = 27;
1189 b2 = 26;
1190 } else {
1191 b0 = 24;
1192 b1 = 25;
1193 b2 = 26;
1194 }
1195
1196 #define DSI_FLD_GET(fld, start, end)\
1197 FLD_GET(dsi_read_reg(dsidev, DSI_##fld), start, end)
1198
1199 pr_debug("DSI resets: PLL (%d) CIO (%d) PHY (%x%x%x, %d, %d, %d)\n",
1200 DSI_FLD_GET(PLL_STATUS, 0, 0),
1201 DSI_FLD_GET(COMPLEXIO_CFG1, 29, 29),
1202 DSI_FLD_GET(DSIPHY_CFG5, b0, b0),
1203 DSI_FLD_GET(DSIPHY_CFG5, b1, b1),
1204 DSI_FLD_GET(DSIPHY_CFG5, b2, b2),
1205 DSI_FLD_GET(DSIPHY_CFG5, 29, 29),
1206 DSI_FLD_GET(DSIPHY_CFG5, 30, 30),
1207 DSI_FLD_GET(DSIPHY_CFG5, 31, 31));
1208
1209 #undef DSI_FLD_GET
1210 }
1211
dsi_if_enable(struct platform_device * dsidev,bool enable)1212 static inline int dsi_if_enable(struct platform_device *dsidev, bool enable)
1213 {
1214 DSSDBG("dsi_if_enable(%d)\n", enable);
1215
1216 enable = enable ? 1 : 0;
1217 REG_FLD_MOD(dsidev, DSI_CTRL, enable, 0, 0); /* IF_EN */
1218
1219 if (wait_for_bit_change(dsidev, DSI_CTRL, 0, enable) != enable) {
1220 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1221 return -EIO;
1222 }
1223
1224 return 0;
1225 }
1226
dsi_get_pll_hsdiv_dispc_rate(struct platform_device * dsidev)1227 static unsigned long dsi_get_pll_hsdiv_dispc_rate(struct platform_device *dsidev)
1228 {
1229 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1230
1231 return dsi->pll.cinfo.clkout[HSDIV_DISPC];
1232 }
1233
dsi_get_pll_hsdiv_dsi_rate(struct platform_device * dsidev)1234 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct platform_device *dsidev)
1235 {
1236 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1237
1238 return dsi->pll.cinfo.clkout[HSDIV_DSI];
1239 }
1240
dsi_get_txbyteclkhs(struct platform_device * dsidev)1241 static unsigned long dsi_get_txbyteclkhs(struct platform_device *dsidev)
1242 {
1243 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1244
1245 return dsi->pll.cinfo.clkdco / 16;
1246 }
1247
dsi_fclk_rate(struct platform_device * dsidev)1248 static unsigned long dsi_fclk_rate(struct platform_device *dsidev)
1249 {
1250 unsigned long r;
1251 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1252
1253 if (dss_get_dsi_clk_source(dsi->module_id) == OMAP_DSS_CLK_SRC_FCK) {
1254 /* DSI FCLK source is DSS_CLK_FCK */
1255 r = clk_get_rate(dsi->dss_clk);
1256 } else {
1257 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1258 r = dsi_get_pll_hsdiv_dsi_rate(dsidev);
1259 }
1260
1261 return r;
1262 }
1263
dsi_lp_clock_calc(unsigned long dsi_fclk,unsigned long lp_clk_min,unsigned long lp_clk_max,struct dsi_lp_clock_info * lp_cinfo)1264 static int dsi_lp_clock_calc(unsigned long dsi_fclk,
1265 unsigned long lp_clk_min, unsigned long lp_clk_max,
1266 struct dsi_lp_clock_info *lp_cinfo)
1267 {
1268 unsigned lp_clk_div;
1269 unsigned long lp_clk;
1270
1271 lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk_max * 2);
1272 lp_clk = dsi_fclk / 2 / lp_clk_div;
1273
1274 if (lp_clk < lp_clk_min || lp_clk > lp_clk_max)
1275 return -EINVAL;
1276
1277 lp_cinfo->lp_clk_div = lp_clk_div;
1278 lp_cinfo->lp_clk = lp_clk;
1279
1280 return 0;
1281 }
1282
dsi_set_lp_clk_divisor(struct platform_device * dsidev)1283 static int dsi_set_lp_clk_divisor(struct platform_device *dsidev)
1284 {
1285 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1286 unsigned long dsi_fclk;
1287 unsigned lp_clk_div;
1288 unsigned long lp_clk;
1289 unsigned lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
1290
1291
1292 lp_clk_div = dsi->user_lp_cinfo.lp_clk_div;
1293
1294 if (lp_clk_div == 0 || lp_clk_div > lpdiv_max)
1295 return -EINVAL;
1296
1297 dsi_fclk = dsi_fclk_rate(dsidev);
1298
1299 lp_clk = dsi_fclk / 2 / lp_clk_div;
1300
1301 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1302 dsi->current_lp_cinfo.lp_clk = lp_clk;
1303 dsi->current_lp_cinfo.lp_clk_div = lp_clk_div;
1304
1305 /* LP_CLK_DIVISOR */
1306 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, lp_clk_div, 12, 0);
1307
1308 /* LP_RX_SYNCHRO_ENABLE */
1309 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21);
1310
1311 return 0;
1312 }
1313
dsi_enable_scp_clk(struct platform_device * dsidev)1314 static void dsi_enable_scp_clk(struct platform_device *dsidev)
1315 {
1316 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1317
1318 if (dsi->scp_clk_refcount++ == 0)
1319 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
1320 }
1321
dsi_disable_scp_clk(struct platform_device * dsidev)1322 static void dsi_disable_scp_clk(struct platform_device *dsidev)
1323 {
1324 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1325
1326 WARN_ON(dsi->scp_clk_refcount == 0);
1327 if (--dsi->scp_clk_refcount == 0)
1328 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
1329 }
1330
1331 enum dsi_pll_power_state {
1332 DSI_PLL_POWER_OFF = 0x0,
1333 DSI_PLL_POWER_ON_HSCLK = 0x1,
1334 DSI_PLL_POWER_ON_ALL = 0x2,
1335 DSI_PLL_POWER_ON_DIV = 0x3,
1336 };
1337
dsi_pll_power(struct platform_device * dsidev,enum dsi_pll_power_state state)1338 static int dsi_pll_power(struct platform_device *dsidev,
1339 enum dsi_pll_power_state state)
1340 {
1341 int t = 0;
1342
1343 /* DSI-PLL power command 0x3 is not working */
1344 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
1345 state == DSI_PLL_POWER_ON_DIV)
1346 state = DSI_PLL_POWER_ON_ALL;
1347
1348 /* PLL_PWR_CMD */
1349 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, state, 31, 30);
1350
1351 /* PLL_PWR_STATUS */
1352 while (FLD_GET(dsi_read_reg(dsidev, DSI_CLK_CTRL), 29, 28) != state) {
1353 if (++t > 1000) {
1354 DSSERR("Failed to set DSI PLL power mode to %d\n",
1355 state);
1356 return -ENODEV;
1357 }
1358 udelay(1);
1359 }
1360
1361 return 0;
1362 }
1363
1364
dsi_pll_calc_dsi_fck(struct dss_pll_clock_info * cinfo)1365 static void dsi_pll_calc_dsi_fck(struct dss_pll_clock_info *cinfo)
1366 {
1367 unsigned long max_dsi_fck;
1368
1369 max_dsi_fck = dss_feat_get_param_max(FEAT_PARAM_DSI_FCK);
1370
1371 cinfo->mX[HSDIV_DSI] = DIV_ROUND_UP(cinfo->clkdco, max_dsi_fck);
1372 cinfo->clkout[HSDIV_DSI] = cinfo->clkdco / cinfo->mX[HSDIV_DSI];
1373 }
1374
dsi_pll_enable(struct dss_pll * pll)1375 static int dsi_pll_enable(struct dss_pll *pll)
1376 {
1377 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1378 struct platform_device *dsidev = dsi->pdev;
1379 int r = 0;
1380
1381 DSSDBG("PLL init\n");
1382
1383 r = dsi_regulator_init(dsidev);
1384 if (r)
1385 return r;
1386
1387 r = dsi_runtime_get(dsidev);
1388 if (r)
1389 return r;
1390
1391 /*
1392 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
1393 */
1394 dsi_enable_scp_clk(dsidev);
1395
1396 if (!dsi->vdds_dsi_enabled) {
1397 r = regulator_enable(dsi->vdds_dsi_reg);
1398 if (r)
1399 goto err0;
1400 dsi->vdds_dsi_enabled = true;
1401 }
1402
1403 /* XXX PLL does not come out of reset without this... */
1404 dispc_pck_free_enable(1);
1405
1406 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 0, 1) != 1) {
1407 DSSERR("PLL not coming out of reset.\n");
1408 r = -ENODEV;
1409 dispc_pck_free_enable(0);
1410 goto err1;
1411 }
1412
1413 /* XXX ... but if left on, we get problems when planes do not
1414 * fill the whole display. No idea about this */
1415 dispc_pck_free_enable(0);
1416
1417 r = dsi_pll_power(dsidev, DSI_PLL_POWER_ON_ALL);
1418
1419 if (r)
1420 goto err1;
1421
1422 DSSDBG("PLL init done\n");
1423
1424 return 0;
1425 err1:
1426 if (dsi->vdds_dsi_enabled) {
1427 regulator_disable(dsi->vdds_dsi_reg);
1428 dsi->vdds_dsi_enabled = false;
1429 }
1430 err0:
1431 dsi_disable_scp_clk(dsidev);
1432 dsi_runtime_put(dsidev);
1433 return r;
1434 }
1435
dsi_pll_uninit(struct platform_device * dsidev,bool disconnect_lanes)1436 static void dsi_pll_uninit(struct platform_device *dsidev, bool disconnect_lanes)
1437 {
1438 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1439
1440 dsi_pll_power(dsidev, DSI_PLL_POWER_OFF);
1441 if (disconnect_lanes) {
1442 WARN_ON(!dsi->vdds_dsi_enabled);
1443 regulator_disable(dsi->vdds_dsi_reg);
1444 dsi->vdds_dsi_enabled = false;
1445 }
1446
1447 dsi_disable_scp_clk(dsidev);
1448 dsi_runtime_put(dsidev);
1449
1450 DSSDBG("PLL uninit done\n");
1451 }
1452
dsi_pll_disable(struct dss_pll * pll)1453 static void dsi_pll_disable(struct dss_pll *pll)
1454 {
1455 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1456 struct platform_device *dsidev = dsi->pdev;
1457
1458 dsi_pll_uninit(dsidev, true);
1459 }
1460
dsi_dump_dsidev_clocks(struct platform_device * dsidev,struct seq_file * s)1461 static void dsi_dump_dsidev_clocks(struct platform_device *dsidev,
1462 struct seq_file *s)
1463 {
1464 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1465 struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo;
1466 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src;
1467 int dsi_module = dsi->module_id;
1468 struct dss_pll *pll = &dsi->pll;
1469
1470 dispc_clk_src = dss_get_dispc_clk_source();
1471 dsi_clk_src = dss_get_dsi_clk_source(dsi_module);
1472
1473 if (dsi_runtime_get(dsidev))
1474 return;
1475
1476 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1);
1477
1478 seq_printf(s, "dsi pll clkin\t%lu\n", clk_get_rate(pll->clkin));
1479
1480 seq_printf(s, "Fint\t\t%-16lun %u\n", cinfo->fint, cinfo->n);
1481
1482 seq_printf(s, "CLKIN4DDR\t%-16lum %u\n",
1483 cinfo->clkdco, cinfo->m);
1484
1485 seq_printf(s, "DSI_PLL_HSDIV_DISPC (%s)\t%-16lum_dispc %u\t(%s)\n",
1486 dss_feat_get_clk_source_name(dsi_module == 0 ?
1487 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC :
1488 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC),
1489 cinfo->clkout[HSDIV_DISPC],
1490 cinfo->mX[HSDIV_DISPC],
1491 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1492 "off" : "on");
1493
1494 seq_printf(s, "DSI_PLL_HSDIV_DSI (%s)\t%-16lum_dsi %u\t(%s)\n",
1495 dss_feat_get_clk_source_name(dsi_module == 0 ?
1496 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI :
1497 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI),
1498 cinfo->clkout[HSDIV_DSI],
1499 cinfo->mX[HSDIV_DSI],
1500 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1501 "off" : "on");
1502
1503 seq_printf(s, "- DSI%d -\n", dsi_module + 1);
1504
1505 seq_printf(s, "dsi fclk source = %s (%s)\n",
1506 dss_get_generic_clk_source_name(dsi_clk_src),
1507 dss_feat_get_clk_source_name(dsi_clk_src));
1508
1509 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsidev));
1510
1511 seq_printf(s, "DDR_CLK\t\t%lu\n",
1512 cinfo->clkdco / 4);
1513
1514 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsidev));
1515
1516 seq_printf(s, "LP_CLK\t\t%lu\n", dsi->current_lp_cinfo.lp_clk);
1517
1518 dsi_runtime_put(dsidev);
1519 }
1520
dsi_dump_clocks(struct seq_file * s)1521 void dsi_dump_clocks(struct seq_file *s)
1522 {
1523 struct platform_device *dsidev;
1524 int i;
1525
1526 for (i = 0; i < MAX_NUM_DSI; i++) {
1527 dsidev = dsi_get_dsidev_from_id(i);
1528 if (dsidev)
1529 dsi_dump_dsidev_clocks(dsidev, s);
1530 }
1531 }
1532
1533 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_dump_dsidev_irqs(struct platform_device * dsidev,struct seq_file * s)1534 static void dsi_dump_dsidev_irqs(struct platform_device *dsidev,
1535 struct seq_file *s)
1536 {
1537 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1538 unsigned long flags;
1539 struct dsi_irq_stats *stats;
1540
1541 stats = kzalloc(sizeof(*stats), GFP_KERNEL);
1542 if (!stats) {
1543 seq_printf(s, "out of memory\n");
1544 return;
1545 }
1546
1547 spin_lock_irqsave(&dsi->irq_stats_lock, flags);
1548
1549 *stats = dsi->irq_stats;
1550 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats));
1551 dsi->irq_stats.last_reset = jiffies;
1552
1553 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags);
1554
1555 seq_printf(s, "period %u ms\n",
1556 jiffies_to_msecs(jiffies - stats->last_reset));
1557
1558 seq_printf(s, "irqs %d\n", stats->irq_count);
1559 #define PIS(x) \
1560 seq_printf(s, "%-20s %10d\n", #x, stats->dsi_irqs[ffs(DSI_IRQ_##x)-1])
1561
1562 seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1);
1563 PIS(VC0);
1564 PIS(VC1);
1565 PIS(VC2);
1566 PIS(VC3);
1567 PIS(WAKEUP);
1568 PIS(RESYNC);
1569 PIS(PLL_LOCK);
1570 PIS(PLL_UNLOCK);
1571 PIS(PLL_RECALL);
1572 PIS(COMPLEXIO_ERR);
1573 PIS(HS_TX_TIMEOUT);
1574 PIS(LP_RX_TIMEOUT);
1575 PIS(TE_TRIGGER);
1576 PIS(ACK_TRIGGER);
1577 PIS(SYNC_LOST);
1578 PIS(LDO_POWER_GOOD);
1579 PIS(TA_TIMEOUT);
1580 #undef PIS
1581
1582 #define PIS(x) \
1583 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1584 stats->vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1585 stats->vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1586 stats->vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1587 stats->vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1588
1589 seq_printf(s, "-- VC interrupts --\n");
1590 PIS(CS);
1591 PIS(ECC_CORR);
1592 PIS(PACKET_SENT);
1593 PIS(FIFO_TX_OVF);
1594 PIS(FIFO_RX_OVF);
1595 PIS(BTA);
1596 PIS(ECC_NO_CORR);
1597 PIS(FIFO_TX_UDF);
1598 PIS(PP_BUSY_CHANGE);
1599 #undef PIS
1600
1601 #define PIS(x) \
1602 seq_printf(s, "%-20s %10d\n", #x, \
1603 stats->cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1604
1605 seq_printf(s, "-- CIO interrupts --\n");
1606 PIS(ERRSYNCESC1);
1607 PIS(ERRSYNCESC2);
1608 PIS(ERRSYNCESC3);
1609 PIS(ERRESC1);
1610 PIS(ERRESC2);
1611 PIS(ERRESC3);
1612 PIS(ERRCONTROL1);
1613 PIS(ERRCONTROL2);
1614 PIS(ERRCONTROL3);
1615 PIS(STATEULPS1);
1616 PIS(STATEULPS2);
1617 PIS(STATEULPS3);
1618 PIS(ERRCONTENTIONLP0_1);
1619 PIS(ERRCONTENTIONLP1_1);
1620 PIS(ERRCONTENTIONLP0_2);
1621 PIS(ERRCONTENTIONLP1_2);
1622 PIS(ERRCONTENTIONLP0_3);
1623 PIS(ERRCONTENTIONLP1_3);
1624 PIS(ULPSACTIVENOT_ALL0);
1625 PIS(ULPSACTIVENOT_ALL1);
1626 #undef PIS
1627
1628 kfree(stats);
1629 }
1630
dsi1_dump_irqs(struct seq_file * s)1631 static void dsi1_dump_irqs(struct seq_file *s)
1632 {
1633 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1634
1635 dsi_dump_dsidev_irqs(dsidev, s);
1636 }
1637
dsi2_dump_irqs(struct seq_file * s)1638 static void dsi2_dump_irqs(struct seq_file *s)
1639 {
1640 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1641
1642 dsi_dump_dsidev_irqs(dsidev, s);
1643 }
1644 #endif
1645
dsi_dump_dsidev_regs(struct platform_device * dsidev,struct seq_file * s)1646 static void dsi_dump_dsidev_regs(struct platform_device *dsidev,
1647 struct seq_file *s)
1648 {
1649 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsidev, r))
1650
1651 if (dsi_runtime_get(dsidev))
1652 return;
1653 dsi_enable_scp_clk(dsidev);
1654
1655 DUMPREG(DSI_REVISION);
1656 DUMPREG(DSI_SYSCONFIG);
1657 DUMPREG(DSI_SYSSTATUS);
1658 DUMPREG(DSI_IRQSTATUS);
1659 DUMPREG(DSI_IRQENABLE);
1660 DUMPREG(DSI_CTRL);
1661 DUMPREG(DSI_COMPLEXIO_CFG1);
1662 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1663 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1664 DUMPREG(DSI_CLK_CTRL);
1665 DUMPREG(DSI_TIMING1);
1666 DUMPREG(DSI_TIMING2);
1667 DUMPREG(DSI_VM_TIMING1);
1668 DUMPREG(DSI_VM_TIMING2);
1669 DUMPREG(DSI_VM_TIMING3);
1670 DUMPREG(DSI_CLK_TIMING);
1671 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1672 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1673 DUMPREG(DSI_COMPLEXIO_CFG2);
1674 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1675 DUMPREG(DSI_VM_TIMING4);
1676 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1677 DUMPREG(DSI_VM_TIMING5);
1678 DUMPREG(DSI_VM_TIMING6);
1679 DUMPREG(DSI_VM_TIMING7);
1680 DUMPREG(DSI_STOPCLK_TIMING);
1681
1682 DUMPREG(DSI_VC_CTRL(0));
1683 DUMPREG(DSI_VC_TE(0));
1684 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1685 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1686 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1687 DUMPREG(DSI_VC_IRQSTATUS(0));
1688 DUMPREG(DSI_VC_IRQENABLE(0));
1689
1690 DUMPREG(DSI_VC_CTRL(1));
1691 DUMPREG(DSI_VC_TE(1));
1692 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1693 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1694 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1695 DUMPREG(DSI_VC_IRQSTATUS(1));
1696 DUMPREG(DSI_VC_IRQENABLE(1));
1697
1698 DUMPREG(DSI_VC_CTRL(2));
1699 DUMPREG(DSI_VC_TE(2));
1700 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1701 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1702 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1703 DUMPREG(DSI_VC_IRQSTATUS(2));
1704 DUMPREG(DSI_VC_IRQENABLE(2));
1705
1706 DUMPREG(DSI_VC_CTRL(3));
1707 DUMPREG(DSI_VC_TE(3));
1708 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1709 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1710 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1711 DUMPREG(DSI_VC_IRQSTATUS(3));
1712 DUMPREG(DSI_VC_IRQENABLE(3));
1713
1714 DUMPREG(DSI_DSIPHY_CFG0);
1715 DUMPREG(DSI_DSIPHY_CFG1);
1716 DUMPREG(DSI_DSIPHY_CFG2);
1717 DUMPREG(DSI_DSIPHY_CFG5);
1718
1719 DUMPREG(DSI_PLL_CONTROL);
1720 DUMPREG(DSI_PLL_STATUS);
1721 DUMPREG(DSI_PLL_GO);
1722 DUMPREG(DSI_PLL_CONFIGURATION1);
1723 DUMPREG(DSI_PLL_CONFIGURATION2);
1724
1725 dsi_disable_scp_clk(dsidev);
1726 dsi_runtime_put(dsidev);
1727 #undef DUMPREG
1728 }
1729
dsi1_dump_regs(struct seq_file * s)1730 static void dsi1_dump_regs(struct seq_file *s)
1731 {
1732 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1733
1734 dsi_dump_dsidev_regs(dsidev, s);
1735 }
1736
dsi2_dump_regs(struct seq_file * s)1737 static void dsi2_dump_regs(struct seq_file *s)
1738 {
1739 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1740
1741 dsi_dump_dsidev_regs(dsidev, s);
1742 }
1743
1744 enum dsi_cio_power_state {
1745 DSI_COMPLEXIO_POWER_OFF = 0x0,
1746 DSI_COMPLEXIO_POWER_ON = 0x1,
1747 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1748 };
1749
dsi_cio_power(struct platform_device * dsidev,enum dsi_cio_power_state state)1750 static int dsi_cio_power(struct platform_device *dsidev,
1751 enum dsi_cio_power_state state)
1752 {
1753 int t = 0;
1754
1755 /* PWR_CMD */
1756 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG1, state, 28, 27);
1757
1758 /* PWR_STATUS */
1759 while (FLD_GET(dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1),
1760 26, 25) != state) {
1761 if (++t > 1000) {
1762 DSSERR("failed to set complexio power state to "
1763 "%d\n", state);
1764 return -ENODEV;
1765 }
1766 udelay(1);
1767 }
1768
1769 return 0;
1770 }
1771
dsi_get_line_buf_size(struct platform_device * dsidev)1772 static unsigned dsi_get_line_buf_size(struct platform_device *dsidev)
1773 {
1774 int val;
1775
1776 /* line buffer on OMAP3 is 1024 x 24bits */
1777 /* XXX: for some reason using full buffer size causes
1778 * considerable TX slowdown with update sizes that fill the
1779 * whole buffer */
1780 if (!dss_has_feature(FEAT_DSI_GNQ))
1781 return 1023 * 3;
1782
1783 val = REG_GET(dsidev, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */
1784
1785 switch (val) {
1786 case 1:
1787 return 512 * 3; /* 512x24 bits */
1788 case 2:
1789 return 682 * 3; /* 682x24 bits */
1790 case 3:
1791 return 853 * 3; /* 853x24 bits */
1792 case 4:
1793 return 1024 * 3; /* 1024x24 bits */
1794 case 5:
1795 return 1194 * 3; /* 1194x24 bits */
1796 case 6:
1797 return 1365 * 3; /* 1365x24 bits */
1798 case 7:
1799 return 1920 * 3; /* 1920x24 bits */
1800 default:
1801 BUG();
1802 return 0;
1803 }
1804 }
1805
dsi_set_lane_config(struct platform_device * dsidev)1806 static int dsi_set_lane_config(struct platform_device *dsidev)
1807 {
1808 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1809 static const u8 offsets[] = { 0, 4, 8, 12, 16 };
1810 static const enum dsi_lane_function functions[] = {
1811 DSI_LANE_CLK,
1812 DSI_LANE_DATA1,
1813 DSI_LANE_DATA2,
1814 DSI_LANE_DATA3,
1815 DSI_LANE_DATA4,
1816 };
1817 u32 r;
1818 int i;
1819
1820 r = dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1);
1821
1822 for (i = 0; i < dsi->num_lanes_used; ++i) {
1823 unsigned offset = offsets[i];
1824 unsigned polarity, lane_number;
1825 unsigned t;
1826
1827 for (t = 0; t < dsi->num_lanes_supported; ++t)
1828 if (dsi->lanes[t].function == functions[i])
1829 break;
1830
1831 if (t == dsi->num_lanes_supported)
1832 return -EINVAL;
1833
1834 lane_number = t;
1835 polarity = dsi->lanes[t].polarity;
1836
1837 r = FLD_MOD(r, lane_number + 1, offset + 2, offset);
1838 r = FLD_MOD(r, polarity, offset + 3, offset + 3);
1839 }
1840
1841 /* clear the unused lanes */
1842 for (; i < dsi->num_lanes_supported; ++i) {
1843 unsigned offset = offsets[i];
1844
1845 r = FLD_MOD(r, 0, offset + 2, offset);
1846 r = FLD_MOD(r, 0, offset + 3, offset + 3);
1847 }
1848
1849 dsi_write_reg(dsidev, DSI_COMPLEXIO_CFG1, r);
1850
1851 return 0;
1852 }
1853
ns2ddr(struct platform_device * dsidev,unsigned ns)1854 static inline unsigned ns2ddr(struct platform_device *dsidev, unsigned ns)
1855 {
1856 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1857
1858 /* convert time in ns to ddr ticks, rounding up */
1859 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1860 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1861 }
1862
ddr2ns(struct platform_device * dsidev,unsigned ddr)1863 static inline unsigned ddr2ns(struct platform_device *dsidev, unsigned ddr)
1864 {
1865 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1866
1867 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1868 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1869 }
1870
dsi_cio_timings(struct platform_device * dsidev)1871 static void dsi_cio_timings(struct platform_device *dsidev)
1872 {
1873 u32 r;
1874 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1875 u32 tlpx_half, tclk_trail, tclk_zero;
1876 u32 tclk_prepare;
1877
1878 /* calculate timings */
1879
1880 /* 1 * DDR_CLK = 2 * UI */
1881
1882 /* min 40ns + 4*UI max 85ns + 6*UI */
1883 ths_prepare = ns2ddr(dsidev, 70) + 2;
1884
1885 /* min 145ns + 10*UI */
1886 ths_prepare_ths_zero = ns2ddr(dsidev, 175) + 2;
1887
1888 /* min max(8*UI, 60ns+4*UI) */
1889 ths_trail = ns2ddr(dsidev, 60) + 5;
1890
1891 /* min 100ns */
1892 ths_exit = ns2ddr(dsidev, 145);
1893
1894 /* tlpx min 50n */
1895 tlpx_half = ns2ddr(dsidev, 25);
1896
1897 /* min 60ns */
1898 tclk_trail = ns2ddr(dsidev, 60) + 2;
1899
1900 /* min 38ns, max 95ns */
1901 tclk_prepare = ns2ddr(dsidev, 65);
1902
1903 /* min tclk-prepare + tclk-zero = 300ns */
1904 tclk_zero = ns2ddr(dsidev, 260);
1905
1906 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1907 ths_prepare, ddr2ns(dsidev, ths_prepare),
1908 ths_prepare_ths_zero, ddr2ns(dsidev, ths_prepare_ths_zero));
1909 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1910 ths_trail, ddr2ns(dsidev, ths_trail),
1911 ths_exit, ddr2ns(dsidev, ths_exit));
1912
1913 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1914 "tclk_zero %u (%uns)\n",
1915 tlpx_half, ddr2ns(dsidev, tlpx_half),
1916 tclk_trail, ddr2ns(dsidev, tclk_trail),
1917 tclk_zero, ddr2ns(dsidev, tclk_zero));
1918 DSSDBG("tclk_prepare %u (%uns)\n",
1919 tclk_prepare, ddr2ns(dsidev, tclk_prepare));
1920
1921 /* program timings */
1922
1923 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
1924 r = FLD_MOD(r, ths_prepare, 31, 24);
1925 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1926 r = FLD_MOD(r, ths_trail, 15, 8);
1927 r = FLD_MOD(r, ths_exit, 7, 0);
1928 dsi_write_reg(dsidev, DSI_DSIPHY_CFG0, r);
1929
1930 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
1931 r = FLD_MOD(r, tlpx_half, 20, 16);
1932 r = FLD_MOD(r, tclk_trail, 15, 8);
1933 r = FLD_MOD(r, tclk_zero, 7, 0);
1934
1935 if (dss_has_feature(FEAT_DSI_PHY_DCC)) {
1936 r = FLD_MOD(r, 0, 21, 21); /* DCCEN = disable */
1937 r = FLD_MOD(r, 1, 22, 22); /* CLKINP_DIVBY2EN = enable */
1938 r = FLD_MOD(r, 1, 23, 23); /* CLKINP_SEL = enable */
1939 }
1940
1941 dsi_write_reg(dsidev, DSI_DSIPHY_CFG1, r);
1942
1943 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
1944 r = FLD_MOD(r, tclk_prepare, 7, 0);
1945 dsi_write_reg(dsidev, DSI_DSIPHY_CFG2, r);
1946 }
1947
1948 /* lane masks have lane 0 at lsb. mask_p for positive lines, n for negative */
dsi_cio_enable_lane_override(struct platform_device * dsidev,unsigned mask_p,unsigned mask_n)1949 static void dsi_cio_enable_lane_override(struct platform_device *dsidev,
1950 unsigned mask_p, unsigned mask_n)
1951 {
1952 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1953 int i;
1954 u32 l;
1955 u8 lptxscp_start = dsi->num_lanes_supported == 3 ? 22 : 26;
1956
1957 l = 0;
1958
1959 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1960 unsigned p = dsi->lanes[i].polarity;
1961
1962 if (mask_p & (1 << i))
1963 l |= 1 << (i * 2 + (p ? 0 : 1));
1964
1965 if (mask_n & (1 << i))
1966 l |= 1 << (i * 2 + (p ? 1 : 0));
1967 }
1968
1969 /*
1970 * Bits in REGLPTXSCPDAT4TO0DXDY:
1971 * 17: DY0 18: DX0
1972 * 19: DY1 20: DX1
1973 * 21: DY2 22: DX2
1974 * 23: DY3 24: DX3
1975 * 25: DY4 26: DX4
1976 */
1977
1978 /* Set the lane override configuration */
1979
1980 /* REGLPTXSCPDAT4TO0DXDY */
1981 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, lptxscp_start, 17);
1982
1983 /* Enable lane override */
1984
1985 /* ENLPTXSCPDAT */
1986 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 1, 27, 27);
1987 }
1988
dsi_cio_disable_lane_override(struct platform_device * dsidev)1989 static void dsi_cio_disable_lane_override(struct platform_device *dsidev)
1990 {
1991 /* Disable lane override */
1992 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
1993 /* Reset the lane override configuration */
1994 /* REGLPTXSCPDAT4TO0DXDY */
1995 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 22, 17);
1996 }
1997
dsi_cio_wait_tx_clk_esc_reset(struct platform_device * dsidev)1998 static int dsi_cio_wait_tx_clk_esc_reset(struct platform_device *dsidev)
1999 {
2000 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2001 int t, i;
2002 bool in_use[DSI_MAX_NR_LANES];
2003 static const u8 offsets_old[] = { 28, 27, 26 };
2004 static const u8 offsets_new[] = { 24, 25, 26, 27, 28 };
2005 const u8 *offsets;
2006
2007 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC))
2008 offsets = offsets_old;
2009 else
2010 offsets = offsets_new;
2011
2012 for (i = 0; i < dsi->num_lanes_supported; ++i)
2013 in_use[i] = dsi->lanes[i].function != DSI_LANE_UNUSED;
2014
2015 t = 100000;
2016 while (true) {
2017 u32 l;
2018 int ok;
2019
2020 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2021
2022 ok = 0;
2023 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2024 if (!in_use[i] || (l & (1 << offsets[i])))
2025 ok++;
2026 }
2027
2028 if (ok == dsi->num_lanes_supported)
2029 break;
2030
2031 if (--t == 0) {
2032 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2033 if (!in_use[i] || (l & (1 << offsets[i])))
2034 continue;
2035
2036 DSSERR("CIO TXCLKESC%d domain not coming " \
2037 "out of reset\n", i);
2038 }
2039 return -EIO;
2040 }
2041 }
2042
2043 return 0;
2044 }
2045
2046 /* return bitmask of enabled lanes, lane0 being the lsb */
dsi_get_lane_mask(struct platform_device * dsidev)2047 static unsigned dsi_get_lane_mask(struct platform_device *dsidev)
2048 {
2049 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2050 unsigned mask = 0;
2051 int i;
2052
2053 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2054 if (dsi->lanes[i].function != DSI_LANE_UNUSED)
2055 mask |= 1 << i;
2056 }
2057
2058 return mask;
2059 }
2060
dsi_cio_init(struct platform_device * dsidev)2061 static int dsi_cio_init(struct platform_device *dsidev)
2062 {
2063 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2064 int r;
2065 u32 l;
2066
2067 DSSDBG("DSI CIO init starts");
2068
2069 r = dss_dsi_enable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2070 if (r)
2071 return r;
2072
2073 dsi_enable_scp_clk(dsidev);
2074
2075 /* A dummy read using the SCP interface to any DSIPHY register is
2076 * required after DSIPHY reset to complete the reset of the DSI complex
2077 * I/O. */
2078 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2079
2080 if (wait_for_bit_change(dsidev, DSI_DSIPHY_CFG5, 30, 1) != 1) {
2081 DSSERR("CIO SCP Clock domain not coming out of reset.\n");
2082 r = -EIO;
2083 goto err_scp_clk_dom;
2084 }
2085
2086 r = dsi_set_lane_config(dsidev);
2087 if (r)
2088 goto err_scp_clk_dom;
2089
2090 /* set TX STOP MODE timer to maximum for this operation */
2091 l = dsi_read_reg(dsidev, DSI_TIMING1);
2092 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2093 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
2094 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
2095 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
2096 dsi_write_reg(dsidev, DSI_TIMING1, l);
2097
2098 if (dsi->ulps_enabled) {
2099 unsigned mask_p;
2100 int i;
2101
2102 DSSDBG("manual ulps exit\n");
2103
2104 /* ULPS is exited by Mark-1 state for 1ms, followed by
2105 * stop state. DSS HW cannot do this via the normal
2106 * ULPS exit sequence, as after reset the DSS HW thinks
2107 * that we are not in ULPS mode, and refuses to send the
2108 * sequence. So we need to send the ULPS exit sequence
2109 * manually by setting positive lines high and negative lines
2110 * low for 1ms.
2111 */
2112
2113 mask_p = 0;
2114
2115 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2116 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
2117 continue;
2118 mask_p |= 1 << i;
2119 }
2120
2121 dsi_cio_enable_lane_override(dsidev, mask_p, 0);
2122 }
2123
2124 r = dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ON);
2125 if (r)
2126 goto err_cio_pwr;
2127
2128 if (wait_for_bit_change(dsidev, DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
2129 DSSERR("CIO PWR clock domain not coming out of reset.\n");
2130 r = -ENODEV;
2131 goto err_cio_pwr_dom;
2132 }
2133
2134 dsi_if_enable(dsidev, true);
2135 dsi_if_enable(dsidev, false);
2136 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
2137
2138 r = dsi_cio_wait_tx_clk_esc_reset(dsidev);
2139 if (r)
2140 goto err_tx_clk_esc_rst;
2141
2142 if (dsi->ulps_enabled) {
2143 /* Keep Mark-1 state for 1ms (as per DSI spec) */
2144 ktime_t wait = ns_to_ktime(1000 * 1000);
2145 set_current_state(TASK_UNINTERRUPTIBLE);
2146 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
2147
2148 /* Disable the override. The lanes should be set to Mark-11
2149 * state by the HW */
2150 dsi_cio_disable_lane_override(dsidev);
2151 }
2152
2153 /* FORCE_TX_STOP_MODE_IO */
2154 REG_FLD_MOD(dsidev, DSI_TIMING1, 0, 15, 15);
2155
2156 dsi_cio_timings(dsidev);
2157
2158 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2159 /* DDR_CLK_ALWAYS_ON */
2160 REG_FLD_MOD(dsidev, DSI_CLK_CTRL,
2161 dsi->vm_timings.ddr_clk_always_on, 13, 13);
2162 }
2163
2164 dsi->ulps_enabled = false;
2165
2166 DSSDBG("CIO init done\n");
2167
2168 return 0;
2169
2170 err_tx_clk_esc_rst:
2171 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */
2172 err_cio_pwr_dom:
2173 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2174 err_cio_pwr:
2175 if (dsi->ulps_enabled)
2176 dsi_cio_disable_lane_override(dsidev);
2177 err_scp_clk_dom:
2178 dsi_disable_scp_clk(dsidev);
2179 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2180 return r;
2181 }
2182
dsi_cio_uninit(struct platform_device * dsidev)2183 static void dsi_cio_uninit(struct platform_device *dsidev)
2184 {
2185 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2186
2187 /* DDR_CLK_ALWAYS_ON */
2188 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13);
2189
2190 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2191 dsi_disable_scp_clk(dsidev);
2192 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2193 }
2194
dsi_config_tx_fifo(struct platform_device * dsidev,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2195 static void dsi_config_tx_fifo(struct platform_device *dsidev,
2196 enum fifo_size size1, enum fifo_size size2,
2197 enum fifo_size size3, enum fifo_size size4)
2198 {
2199 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2200 u32 r = 0;
2201 int add = 0;
2202 int i;
2203
2204 dsi->vc[0].tx_fifo_size = size1;
2205 dsi->vc[1].tx_fifo_size = size2;
2206 dsi->vc[2].tx_fifo_size = size3;
2207 dsi->vc[3].tx_fifo_size = size4;
2208
2209 for (i = 0; i < 4; i++) {
2210 u8 v;
2211 int size = dsi->vc[i].tx_fifo_size;
2212
2213 if (add + size > 4) {
2214 DSSERR("Illegal FIFO configuration\n");
2215 BUG();
2216 return;
2217 }
2218
2219 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2220 r |= v << (8 * i);
2221 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2222 add += size;
2223 }
2224
2225 dsi_write_reg(dsidev, DSI_TX_FIFO_VC_SIZE, r);
2226 }
2227
dsi_config_rx_fifo(struct platform_device * dsidev,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2228 static void dsi_config_rx_fifo(struct platform_device *dsidev,
2229 enum fifo_size size1, enum fifo_size size2,
2230 enum fifo_size size3, enum fifo_size size4)
2231 {
2232 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2233 u32 r = 0;
2234 int add = 0;
2235 int i;
2236
2237 dsi->vc[0].rx_fifo_size = size1;
2238 dsi->vc[1].rx_fifo_size = size2;
2239 dsi->vc[2].rx_fifo_size = size3;
2240 dsi->vc[3].rx_fifo_size = size4;
2241
2242 for (i = 0; i < 4; i++) {
2243 u8 v;
2244 int size = dsi->vc[i].rx_fifo_size;
2245
2246 if (add + size > 4) {
2247 DSSERR("Illegal FIFO configuration\n");
2248 BUG();
2249 return;
2250 }
2251
2252 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2253 r |= v << (8 * i);
2254 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2255 add += size;
2256 }
2257
2258 dsi_write_reg(dsidev, DSI_RX_FIFO_VC_SIZE, r);
2259 }
2260
dsi_force_tx_stop_mode_io(struct platform_device * dsidev)2261 static int dsi_force_tx_stop_mode_io(struct platform_device *dsidev)
2262 {
2263 u32 r;
2264
2265 r = dsi_read_reg(dsidev, DSI_TIMING1);
2266 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2267 dsi_write_reg(dsidev, DSI_TIMING1, r);
2268
2269 if (wait_for_bit_change(dsidev, DSI_TIMING1, 15, 0) != 0) {
2270 DSSERR("TX_STOP bit not going down\n");
2271 return -EIO;
2272 }
2273
2274 return 0;
2275 }
2276
dsi_vc_is_enabled(struct platform_device * dsidev,int channel)2277 static bool dsi_vc_is_enabled(struct platform_device *dsidev, int channel)
2278 {
2279 return REG_GET(dsidev, DSI_VC_CTRL(channel), 0, 0);
2280 }
2281
dsi_packet_sent_handler_vp(void * data,u32 mask)2282 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2283 {
2284 struct dsi_packet_sent_handler_data *vp_data =
2285 (struct dsi_packet_sent_handler_data *) data;
2286 struct dsi_data *dsi = dsi_get_dsidrv_data(vp_data->dsidev);
2287 const int channel = dsi->update_channel;
2288 u8 bit = dsi->te_enabled ? 30 : 31;
2289
2290 if (REG_GET(vp_data->dsidev, DSI_VC_TE(channel), bit, bit) == 0)
2291 complete(vp_data->completion);
2292 }
2293
dsi_sync_vc_vp(struct platform_device * dsidev,int channel)2294 static int dsi_sync_vc_vp(struct platform_device *dsidev, int channel)
2295 {
2296 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2297 DECLARE_COMPLETION_ONSTACK(completion);
2298 struct dsi_packet_sent_handler_data vp_data = {
2299 .dsidev = dsidev,
2300 .completion = &completion
2301 };
2302 int r = 0;
2303 u8 bit;
2304
2305 bit = dsi->te_enabled ? 30 : 31;
2306
2307 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2308 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2309 if (r)
2310 goto err0;
2311
2312 /* Wait for completion only if TE_EN/TE_START is still set */
2313 if (REG_GET(dsidev, DSI_VC_TE(channel), bit, bit)) {
2314 if (wait_for_completion_timeout(&completion,
2315 msecs_to_jiffies(10)) == 0) {
2316 DSSERR("Failed to complete previous frame transfer\n");
2317 r = -EIO;
2318 goto err1;
2319 }
2320 }
2321
2322 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2323 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2324
2325 return 0;
2326 err1:
2327 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2328 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2329 err0:
2330 return r;
2331 }
2332
dsi_packet_sent_handler_l4(void * data,u32 mask)2333 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2334 {
2335 struct dsi_packet_sent_handler_data *l4_data =
2336 (struct dsi_packet_sent_handler_data *) data;
2337 struct dsi_data *dsi = dsi_get_dsidrv_data(l4_data->dsidev);
2338 const int channel = dsi->update_channel;
2339
2340 if (REG_GET(l4_data->dsidev, DSI_VC_CTRL(channel), 5, 5) == 0)
2341 complete(l4_data->completion);
2342 }
2343
dsi_sync_vc_l4(struct platform_device * dsidev,int channel)2344 static int dsi_sync_vc_l4(struct platform_device *dsidev, int channel)
2345 {
2346 DECLARE_COMPLETION_ONSTACK(completion);
2347 struct dsi_packet_sent_handler_data l4_data = {
2348 .dsidev = dsidev,
2349 .completion = &completion
2350 };
2351 int r = 0;
2352
2353 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2354 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2355 if (r)
2356 goto err0;
2357
2358 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2359 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 5, 5)) {
2360 if (wait_for_completion_timeout(&completion,
2361 msecs_to_jiffies(10)) == 0) {
2362 DSSERR("Failed to complete previous l4 transfer\n");
2363 r = -EIO;
2364 goto err1;
2365 }
2366 }
2367
2368 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2369 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2370
2371 return 0;
2372 err1:
2373 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2374 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2375 err0:
2376 return r;
2377 }
2378
dsi_sync_vc(struct platform_device * dsidev,int channel)2379 static int dsi_sync_vc(struct platform_device *dsidev, int channel)
2380 {
2381 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2382
2383 WARN_ON(!dsi_bus_is_locked(dsidev));
2384
2385 if (!dsi_vc_is_enabled(dsidev, channel))
2386 return 0;
2387
2388 switch (dsi->vc[channel].source) {
2389 case DSI_VC_SOURCE_VP:
2390 return dsi_sync_vc_vp(dsidev, channel);
2391 case DSI_VC_SOURCE_L4:
2392 return dsi_sync_vc_l4(dsidev, channel);
2393 default:
2394 BUG();
2395 return -EINVAL;
2396 }
2397 }
2398
dsi_vc_enable(struct platform_device * dsidev,int channel,bool enable)2399 static int dsi_vc_enable(struct platform_device *dsidev, int channel,
2400 bool enable)
2401 {
2402 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2403 channel, enable);
2404
2405 enable = enable ? 1 : 0;
2406
2407 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 0, 0);
2408
2409 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel),
2410 0, enable) != enable) {
2411 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2412 return -EIO;
2413 }
2414
2415 return 0;
2416 }
2417
dsi_vc_initial_config(struct platform_device * dsidev,int channel)2418 static void dsi_vc_initial_config(struct platform_device *dsidev, int channel)
2419 {
2420 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2421 u32 r;
2422
2423 DSSDBG("Initial config of virtual channel %d", channel);
2424
2425 r = dsi_read_reg(dsidev, DSI_VC_CTRL(channel));
2426
2427 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2428 DSSERR("VC(%d) busy when trying to configure it!\n",
2429 channel);
2430
2431 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2432 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2433 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2434 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2435 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2436 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2437 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2438 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH))
2439 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2440
2441 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2442 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2443
2444 dsi_write_reg(dsidev, DSI_VC_CTRL(channel), r);
2445
2446 dsi->vc[channel].source = DSI_VC_SOURCE_L4;
2447 }
2448
dsi_vc_config_source(struct platform_device * dsidev,int channel,enum dsi_vc_source source)2449 static int dsi_vc_config_source(struct platform_device *dsidev, int channel,
2450 enum dsi_vc_source source)
2451 {
2452 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2453
2454 if (dsi->vc[channel].source == source)
2455 return 0;
2456
2457 DSSDBG("Source config of virtual channel %d", channel);
2458
2459 dsi_sync_vc(dsidev, channel);
2460
2461 dsi_vc_enable(dsidev, channel, 0);
2462
2463 /* VC_BUSY */
2464 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 15, 0) != 0) {
2465 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2466 return -EIO;
2467 }
2468
2469 /* SOURCE, 0 = L4, 1 = video port */
2470 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), source, 1, 1);
2471
2472 /* DCS_CMD_ENABLE */
2473 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
2474 bool enable = source == DSI_VC_SOURCE_VP;
2475 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 30, 30);
2476 }
2477
2478 dsi_vc_enable(dsidev, channel, 1);
2479
2480 dsi->vc[channel].source = source;
2481
2482 return 0;
2483 }
2484
dsi_vc_enable_hs(struct omap_dss_device * dssdev,int channel,bool enable)2485 static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
2486 bool enable)
2487 {
2488 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2489 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2490
2491 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2492
2493 WARN_ON(!dsi_bus_is_locked(dsidev));
2494
2495 dsi_vc_enable(dsidev, channel, 0);
2496 dsi_if_enable(dsidev, 0);
2497
2498 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 9, 9);
2499
2500 dsi_vc_enable(dsidev, channel, 1);
2501 dsi_if_enable(dsidev, 1);
2502
2503 dsi_force_tx_stop_mode_io(dsidev);
2504
2505 /* start the DDR clock by sending a NULL packet */
2506 if (dsi->vm_timings.ddr_clk_always_on && enable)
2507 dsi_vc_send_null(dssdev, channel);
2508 }
2509
dsi_vc_flush_long_data(struct platform_device * dsidev,int channel)2510 static void dsi_vc_flush_long_data(struct platform_device *dsidev, int channel)
2511 {
2512 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2513 u32 val;
2514 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2515 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2516 (val >> 0) & 0xff,
2517 (val >> 8) & 0xff,
2518 (val >> 16) & 0xff,
2519 (val >> 24) & 0xff);
2520 }
2521 }
2522
dsi_show_rx_ack_with_err(u16 err)2523 static void dsi_show_rx_ack_with_err(u16 err)
2524 {
2525 DSSERR("\tACK with ERROR (%#x):\n", err);
2526 if (err & (1 << 0))
2527 DSSERR("\t\tSoT Error\n");
2528 if (err & (1 << 1))
2529 DSSERR("\t\tSoT Sync Error\n");
2530 if (err & (1 << 2))
2531 DSSERR("\t\tEoT Sync Error\n");
2532 if (err & (1 << 3))
2533 DSSERR("\t\tEscape Mode Entry Command Error\n");
2534 if (err & (1 << 4))
2535 DSSERR("\t\tLP Transmit Sync Error\n");
2536 if (err & (1 << 5))
2537 DSSERR("\t\tHS Receive Timeout Error\n");
2538 if (err & (1 << 6))
2539 DSSERR("\t\tFalse Control Error\n");
2540 if (err & (1 << 7))
2541 DSSERR("\t\t(reserved7)\n");
2542 if (err & (1 << 8))
2543 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2544 if (err & (1 << 9))
2545 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2546 if (err & (1 << 10))
2547 DSSERR("\t\tChecksum Error\n");
2548 if (err & (1 << 11))
2549 DSSERR("\t\tData type not recognized\n");
2550 if (err & (1 << 12))
2551 DSSERR("\t\tInvalid VC ID\n");
2552 if (err & (1 << 13))
2553 DSSERR("\t\tInvalid Transmission Length\n");
2554 if (err & (1 << 14))
2555 DSSERR("\t\t(reserved14)\n");
2556 if (err & (1 << 15))
2557 DSSERR("\t\tDSI Protocol Violation\n");
2558 }
2559
dsi_vc_flush_receive_data(struct platform_device * dsidev,int channel)2560 static u16 dsi_vc_flush_receive_data(struct platform_device *dsidev,
2561 int channel)
2562 {
2563 /* RX_FIFO_NOT_EMPTY */
2564 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2565 u32 val;
2566 u8 dt;
2567 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2568 DSSERR("\trawval %#08x\n", val);
2569 dt = FLD_GET(val, 5, 0);
2570 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2571 u16 err = FLD_GET(val, 23, 8);
2572 dsi_show_rx_ack_with_err(err);
2573 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE) {
2574 DSSERR("\tDCS short response, 1 byte: %#x\n",
2575 FLD_GET(val, 23, 8));
2576 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE) {
2577 DSSERR("\tDCS short response, 2 byte: %#x\n",
2578 FLD_GET(val, 23, 8));
2579 } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) {
2580 DSSERR("\tDCS long response, len %d\n",
2581 FLD_GET(val, 23, 8));
2582 dsi_vc_flush_long_data(dsidev, channel);
2583 } else {
2584 DSSERR("\tunknown datatype 0x%02x\n", dt);
2585 }
2586 }
2587 return 0;
2588 }
2589
dsi_vc_send_bta(struct platform_device * dsidev,int channel)2590 static int dsi_vc_send_bta(struct platform_device *dsidev, int channel)
2591 {
2592 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2593
2594 if (dsi->debug_write || dsi->debug_read)
2595 DSSDBG("dsi_vc_send_bta %d\n", channel);
2596
2597 WARN_ON(!dsi_bus_is_locked(dsidev));
2598
2599 /* RX_FIFO_NOT_EMPTY */
2600 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2601 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2602 dsi_vc_flush_receive_data(dsidev, channel);
2603 }
2604
2605 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2606
2607 /* flush posted write */
2608 dsi_read_reg(dsidev, DSI_VC_CTRL(channel));
2609
2610 return 0;
2611 }
2612
dsi_vc_send_bta_sync(struct omap_dss_device * dssdev,int channel)2613 static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel)
2614 {
2615 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2616 DECLARE_COMPLETION_ONSTACK(completion);
2617 int r = 0;
2618 u32 err;
2619
2620 r = dsi_register_isr_vc(dsidev, channel, dsi_completion_handler,
2621 &completion, DSI_VC_IRQ_BTA);
2622 if (r)
2623 goto err0;
2624
2625 r = dsi_register_isr(dsidev, dsi_completion_handler, &completion,
2626 DSI_IRQ_ERROR_MASK);
2627 if (r)
2628 goto err1;
2629
2630 r = dsi_vc_send_bta(dsidev, channel);
2631 if (r)
2632 goto err2;
2633
2634 if (wait_for_completion_timeout(&completion,
2635 msecs_to_jiffies(500)) == 0) {
2636 DSSERR("Failed to receive BTA\n");
2637 r = -EIO;
2638 goto err2;
2639 }
2640
2641 err = dsi_get_errors(dsidev);
2642 if (err) {
2643 DSSERR("Error while sending BTA: %x\n", err);
2644 r = -EIO;
2645 goto err2;
2646 }
2647 err2:
2648 dsi_unregister_isr(dsidev, dsi_completion_handler, &completion,
2649 DSI_IRQ_ERROR_MASK);
2650 err1:
2651 dsi_unregister_isr_vc(dsidev, channel, dsi_completion_handler,
2652 &completion, DSI_VC_IRQ_BTA);
2653 err0:
2654 return r;
2655 }
2656
dsi_vc_write_long_header(struct platform_device * dsidev,int channel,u8 data_type,u16 len,u8 ecc)2657 static inline void dsi_vc_write_long_header(struct platform_device *dsidev,
2658 int channel, u8 data_type, u16 len, u8 ecc)
2659 {
2660 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2661 u32 val;
2662 u8 data_id;
2663
2664 WARN_ON(!dsi_bus_is_locked(dsidev));
2665
2666 data_id = data_type | dsi->vc[channel].vc_id << 6;
2667
2668 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2669 FLD_VAL(ecc, 31, 24);
2670
2671 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_HEADER(channel), val);
2672 }
2673
dsi_vc_write_long_payload(struct platform_device * dsidev,int channel,u8 b1,u8 b2,u8 b3,u8 b4)2674 static inline void dsi_vc_write_long_payload(struct platform_device *dsidev,
2675 int channel, u8 b1, u8 b2, u8 b3, u8 b4)
2676 {
2677 u32 val;
2678
2679 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2680
2681 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2682 b1, b2, b3, b4, val); */
2683
2684 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2685 }
2686
dsi_vc_send_long(struct platform_device * dsidev,int channel,u8 data_type,u8 * data,u16 len,u8 ecc)2687 static int dsi_vc_send_long(struct platform_device *dsidev, int channel,
2688 u8 data_type, u8 *data, u16 len, u8 ecc)
2689 {
2690 /*u32 val; */
2691 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2692 int i;
2693 u8 *p;
2694 int r = 0;
2695 u8 b1, b2, b3, b4;
2696
2697 if (dsi->debug_write)
2698 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2699
2700 /* len + header */
2701 if (dsi->vc[channel].tx_fifo_size * 32 * 4 < len + 4) {
2702 DSSERR("unable to send long packet: packet too long.\n");
2703 return -EINVAL;
2704 }
2705
2706 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4);
2707
2708 dsi_vc_write_long_header(dsidev, channel, data_type, len, ecc);
2709
2710 p = data;
2711 for (i = 0; i < len >> 2; i++) {
2712 if (dsi->debug_write)
2713 DSSDBG("\tsending full packet %d\n", i);
2714
2715 b1 = *p++;
2716 b2 = *p++;
2717 b3 = *p++;
2718 b4 = *p++;
2719
2720 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, b4);
2721 }
2722
2723 i = len % 4;
2724 if (i) {
2725 b1 = 0; b2 = 0; b3 = 0;
2726
2727 if (dsi->debug_write)
2728 DSSDBG("\tsending remainder bytes %d\n", i);
2729
2730 switch (i) {
2731 case 3:
2732 b1 = *p++;
2733 b2 = *p++;
2734 b3 = *p++;
2735 break;
2736 case 2:
2737 b1 = *p++;
2738 b2 = *p++;
2739 break;
2740 case 1:
2741 b1 = *p++;
2742 break;
2743 }
2744
2745 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, 0);
2746 }
2747
2748 return r;
2749 }
2750
dsi_vc_send_short(struct platform_device * dsidev,int channel,u8 data_type,u16 data,u8 ecc)2751 static int dsi_vc_send_short(struct platform_device *dsidev, int channel,
2752 u8 data_type, u16 data, u8 ecc)
2753 {
2754 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2755 u32 r;
2756 u8 data_id;
2757
2758 WARN_ON(!dsi_bus_is_locked(dsidev));
2759
2760 if (dsi->debug_write)
2761 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2762 channel,
2763 data_type, data & 0xff, (data >> 8) & 0xff);
2764
2765 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4);
2766
2767 if (FLD_GET(dsi_read_reg(dsidev, DSI_VC_CTRL(channel)), 16, 16)) {
2768 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2769 return -EINVAL;
2770 }
2771
2772 data_id = data_type | dsi->vc[channel].vc_id << 6;
2773
2774 r = (data_id << 0) | (data << 8) | (ecc << 24);
2775
2776 dsi_write_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel), r);
2777
2778 return 0;
2779 }
2780
dsi_vc_send_null(struct omap_dss_device * dssdev,int channel)2781 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel)
2782 {
2783 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2784
2785 return dsi_vc_send_long(dsidev, channel, MIPI_DSI_NULL_PACKET, NULL,
2786 0, 0);
2787 }
2788
dsi_vc_write_nosync_common(struct platform_device * dsidev,int channel,u8 * data,int len,enum dss_dsi_content_type type)2789 static int dsi_vc_write_nosync_common(struct platform_device *dsidev,
2790 int channel, u8 *data, int len, enum dss_dsi_content_type type)
2791 {
2792 int r;
2793
2794 if (len == 0) {
2795 BUG_ON(type == DSS_DSI_CONTENT_DCS);
2796 r = dsi_vc_send_short(dsidev, channel,
2797 MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM, 0, 0);
2798 } else if (len == 1) {
2799 r = dsi_vc_send_short(dsidev, channel,
2800 type == DSS_DSI_CONTENT_GENERIC ?
2801 MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM :
2802 MIPI_DSI_DCS_SHORT_WRITE, data[0], 0);
2803 } else if (len == 2) {
2804 r = dsi_vc_send_short(dsidev, channel,
2805 type == DSS_DSI_CONTENT_GENERIC ?
2806 MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM :
2807 MIPI_DSI_DCS_SHORT_WRITE_PARAM,
2808 data[0] | (data[1] << 8), 0);
2809 } else {
2810 r = dsi_vc_send_long(dsidev, channel,
2811 type == DSS_DSI_CONTENT_GENERIC ?
2812 MIPI_DSI_GENERIC_LONG_WRITE :
2813 MIPI_DSI_DCS_LONG_WRITE, data, len, 0);
2814 }
2815
2816 return r;
2817 }
2818
dsi_vc_dcs_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2819 static int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel,
2820 u8 *data, int len)
2821 {
2822 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2823
2824 return dsi_vc_write_nosync_common(dsidev, channel, data, len,
2825 DSS_DSI_CONTENT_DCS);
2826 }
2827
dsi_vc_generic_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2828 static int dsi_vc_generic_write_nosync(struct omap_dss_device *dssdev, int channel,
2829 u8 *data, int len)
2830 {
2831 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2832
2833 return dsi_vc_write_nosync_common(dsidev, channel, data, len,
2834 DSS_DSI_CONTENT_GENERIC);
2835 }
2836
dsi_vc_write_common(struct omap_dss_device * dssdev,int channel,u8 * data,int len,enum dss_dsi_content_type type)2837 static int dsi_vc_write_common(struct omap_dss_device *dssdev, int channel,
2838 u8 *data, int len, enum dss_dsi_content_type type)
2839 {
2840 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2841 int r;
2842
2843 r = dsi_vc_write_nosync_common(dsidev, channel, data, len, type);
2844 if (r)
2845 goto err;
2846
2847 r = dsi_vc_send_bta_sync(dssdev, channel);
2848 if (r)
2849 goto err;
2850
2851 /* RX_FIFO_NOT_EMPTY */
2852 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2853 DSSERR("rx fifo not empty after write, dumping data:\n");
2854 dsi_vc_flush_receive_data(dsidev, channel);
2855 r = -EIO;
2856 goto err;
2857 }
2858
2859 return 0;
2860 err:
2861 DSSERR("dsi_vc_write_common(ch %d, cmd 0x%02x, len %d) failed\n",
2862 channel, data[0], len);
2863 return r;
2864 }
2865
dsi_vc_dcs_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2866 static int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2867 int len)
2868 {
2869 return dsi_vc_write_common(dssdev, channel, data, len,
2870 DSS_DSI_CONTENT_DCS);
2871 }
2872
dsi_vc_generic_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2873 static int dsi_vc_generic_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2874 int len)
2875 {
2876 return dsi_vc_write_common(dssdev, channel, data, len,
2877 DSS_DSI_CONTENT_GENERIC);
2878 }
2879
dsi_vc_dcs_send_read_request(struct platform_device * dsidev,int channel,u8 dcs_cmd)2880 static int dsi_vc_dcs_send_read_request(struct platform_device *dsidev,
2881 int channel, u8 dcs_cmd)
2882 {
2883 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2884 int r;
2885
2886 if (dsi->debug_read)
2887 DSSDBG("dsi_vc_dcs_send_read_request(ch%d, dcs_cmd %x)\n",
2888 channel, dcs_cmd);
2889
2890 r = dsi_vc_send_short(dsidev, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0);
2891 if (r) {
2892 DSSERR("dsi_vc_dcs_send_read_request(ch %d, cmd 0x%02x)"
2893 " failed\n", channel, dcs_cmd);
2894 return r;
2895 }
2896
2897 return 0;
2898 }
2899
dsi_vc_generic_send_read_request(struct platform_device * dsidev,int channel,u8 * reqdata,int reqlen)2900 static int dsi_vc_generic_send_read_request(struct platform_device *dsidev,
2901 int channel, u8 *reqdata, int reqlen)
2902 {
2903 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2904 u16 data;
2905 u8 data_type;
2906 int r;
2907
2908 if (dsi->debug_read)
2909 DSSDBG("dsi_vc_generic_send_read_request(ch %d, reqlen %d)\n",
2910 channel, reqlen);
2911
2912 if (reqlen == 0) {
2913 data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM;
2914 data = 0;
2915 } else if (reqlen == 1) {
2916 data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM;
2917 data = reqdata[0];
2918 } else if (reqlen == 2) {
2919 data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM;
2920 data = reqdata[0] | (reqdata[1] << 8);
2921 } else {
2922 BUG();
2923 return -EINVAL;
2924 }
2925
2926 r = dsi_vc_send_short(dsidev, channel, data_type, data, 0);
2927 if (r) {
2928 DSSERR("dsi_vc_generic_send_read_request(ch %d, reqlen %d)"
2929 " failed\n", channel, reqlen);
2930 return r;
2931 }
2932
2933 return 0;
2934 }
2935
dsi_vc_read_rx_fifo(struct platform_device * dsidev,int channel,u8 * buf,int buflen,enum dss_dsi_content_type type)2936 static int dsi_vc_read_rx_fifo(struct platform_device *dsidev, int channel,
2937 u8 *buf, int buflen, enum dss_dsi_content_type type)
2938 {
2939 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2940 u32 val;
2941 u8 dt;
2942 int r;
2943
2944 /* RX_FIFO_NOT_EMPTY */
2945 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20) == 0) {
2946 DSSERR("RX fifo empty when trying to read.\n");
2947 r = -EIO;
2948 goto err;
2949 }
2950
2951 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2952 if (dsi->debug_read)
2953 DSSDBG("\theader: %08x\n", val);
2954 dt = FLD_GET(val, 5, 0);
2955 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2956 u16 err = FLD_GET(val, 23, 8);
2957 dsi_show_rx_ack_with_err(err);
2958 r = -EIO;
2959 goto err;
2960
2961 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2962 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE :
2963 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE)) {
2964 u8 data = FLD_GET(val, 15, 8);
2965 if (dsi->debug_read)
2966 DSSDBG("\t%s short response, 1 byte: %02x\n",
2967 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2968 "DCS", data);
2969
2970 if (buflen < 1) {
2971 r = -EIO;
2972 goto err;
2973 }
2974
2975 buf[0] = data;
2976
2977 return 1;
2978 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2979 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE :
2980 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE)) {
2981 u16 data = FLD_GET(val, 23, 8);
2982 if (dsi->debug_read)
2983 DSSDBG("\t%s short response, 2 byte: %04x\n",
2984 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2985 "DCS", data);
2986
2987 if (buflen < 2) {
2988 r = -EIO;
2989 goto err;
2990 }
2991
2992 buf[0] = data & 0xff;
2993 buf[1] = (data >> 8) & 0xff;
2994
2995 return 2;
2996 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2997 MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE :
2998 MIPI_DSI_RX_DCS_LONG_READ_RESPONSE)) {
2999 int w;
3000 int len = FLD_GET(val, 23, 8);
3001 if (dsi->debug_read)
3002 DSSDBG("\t%s long response, len %d\n",
3003 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
3004 "DCS", len);
3005
3006 if (len > buflen) {
3007 r = -EIO;
3008 goto err;
3009 }
3010
3011 /* two byte checksum ends the packet, not included in len */
3012 for (w = 0; w < len + 2;) {
3013 int b;
3014 val = dsi_read_reg(dsidev,
3015 DSI_VC_SHORT_PACKET_HEADER(channel));
3016 if (dsi->debug_read)
3017 DSSDBG("\t\t%02x %02x %02x %02x\n",
3018 (val >> 0) & 0xff,
3019 (val >> 8) & 0xff,
3020 (val >> 16) & 0xff,
3021 (val >> 24) & 0xff);
3022
3023 for (b = 0; b < 4; ++b) {
3024 if (w < len)
3025 buf[w] = (val >> (b * 8)) & 0xff;
3026 /* we discard the 2 byte checksum */
3027 ++w;
3028 }
3029 }
3030
3031 return len;
3032 } else {
3033 DSSERR("\tunknown datatype 0x%02x\n", dt);
3034 r = -EIO;
3035 goto err;
3036 }
3037
3038 err:
3039 DSSERR("dsi_vc_read_rx_fifo(ch %d type %s) failed\n", channel,
3040 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS");
3041
3042 return r;
3043 }
3044
dsi_vc_dcs_read(struct omap_dss_device * dssdev,int channel,u8 dcs_cmd,u8 * buf,int buflen)3045 static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3046 u8 *buf, int buflen)
3047 {
3048 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3049 int r;
3050
3051 r = dsi_vc_dcs_send_read_request(dsidev, channel, dcs_cmd);
3052 if (r)
3053 goto err;
3054
3055 r = dsi_vc_send_bta_sync(dssdev, channel);
3056 if (r)
3057 goto err;
3058
3059 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen,
3060 DSS_DSI_CONTENT_DCS);
3061 if (r < 0)
3062 goto err;
3063
3064 if (r != buflen) {
3065 r = -EIO;
3066 goto err;
3067 }
3068
3069 return 0;
3070 err:
3071 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", channel, dcs_cmd);
3072 return r;
3073 }
3074
dsi_vc_generic_read(struct omap_dss_device * dssdev,int channel,u8 * reqdata,int reqlen,u8 * buf,int buflen)3075 static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel,
3076 u8 *reqdata, int reqlen, u8 *buf, int buflen)
3077 {
3078 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3079 int r;
3080
3081 r = dsi_vc_generic_send_read_request(dsidev, channel, reqdata, reqlen);
3082 if (r)
3083 return r;
3084
3085 r = dsi_vc_send_bta_sync(dssdev, channel);
3086 if (r)
3087 return r;
3088
3089 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen,
3090 DSS_DSI_CONTENT_GENERIC);
3091 if (r < 0)
3092 return r;
3093
3094 if (r != buflen) {
3095 r = -EIO;
3096 return r;
3097 }
3098
3099 return 0;
3100 }
3101
dsi_vc_set_max_rx_packet_size(struct omap_dss_device * dssdev,int channel,u16 len)3102 static int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel,
3103 u16 len)
3104 {
3105 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3106
3107 return dsi_vc_send_short(dsidev, channel,
3108 MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0);
3109 }
3110
dsi_enter_ulps(struct platform_device * dsidev)3111 static int dsi_enter_ulps(struct platform_device *dsidev)
3112 {
3113 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3114 DECLARE_COMPLETION_ONSTACK(completion);
3115 int r, i;
3116 unsigned mask;
3117
3118 DSSDBG("Entering ULPS");
3119
3120 WARN_ON(!dsi_bus_is_locked(dsidev));
3121
3122 WARN_ON(dsi->ulps_enabled);
3123
3124 if (dsi->ulps_enabled)
3125 return 0;
3126
3127 /* DDR_CLK_ALWAYS_ON */
3128 if (REG_GET(dsidev, DSI_CLK_CTRL, 13, 13)) {
3129 dsi_if_enable(dsidev, 0);
3130 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13);
3131 dsi_if_enable(dsidev, 1);
3132 }
3133
3134 dsi_sync_vc(dsidev, 0);
3135 dsi_sync_vc(dsidev, 1);
3136 dsi_sync_vc(dsidev, 2);
3137 dsi_sync_vc(dsidev, 3);
3138
3139 dsi_force_tx_stop_mode_io(dsidev);
3140
3141 dsi_vc_enable(dsidev, 0, false);
3142 dsi_vc_enable(dsidev, 1, false);
3143 dsi_vc_enable(dsidev, 2, false);
3144 dsi_vc_enable(dsidev, 3, false);
3145
3146 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
3147 DSSERR("HS busy when enabling ULPS\n");
3148 return -EIO;
3149 }
3150
3151 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
3152 DSSERR("LP busy when enabling ULPS\n");
3153 return -EIO;
3154 }
3155
3156 r = dsi_register_isr_cio(dsidev, dsi_completion_handler, &completion,
3157 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3158 if (r)
3159 return r;
3160
3161 mask = 0;
3162
3163 for (i = 0; i < dsi->num_lanes_supported; ++i) {
3164 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
3165 continue;
3166 mask |= 1 << i;
3167 }
3168 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
3169 /* LANEx_ULPS_SIG2 */
3170 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, mask, 9, 5);
3171
3172 /* flush posted write and wait for SCP interface to finish the write */
3173 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
3174
3175 if (wait_for_completion_timeout(&completion,
3176 msecs_to_jiffies(1000)) == 0) {
3177 DSSERR("ULPS enable timeout\n");
3178 r = -EIO;
3179 goto err;
3180 }
3181
3182 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3183 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3184
3185 /* Reset LANEx_ULPS_SIG2 */
3186 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, 0, 9, 5);
3187
3188 /* flush posted write and wait for SCP interface to finish the write */
3189 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
3190
3191 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS);
3192
3193 dsi_if_enable(dsidev, false);
3194
3195 dsi->ulps_enabled = true;
3196
3197 return 0;
3198
3199 err:
3200 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3201 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3202 return r;
3203 }
3204
dsi_set_lp_rx_timeout(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3205 static void dsi_set_lp_rx_timeout(struct platform_device *dsidev,
3206 unsigned ticks, bool x4, bool x16)
3207 {
3208 unsigned long fck;
3209 unsigned long total_ticks;
3210 u32 r;
3211
3212 BUG_ON(ticks > 0x1fff);
3213
3214 /* ticks in DSI_FCK */
3215 fck = dsi_fclk_rate(dsidev);
3216
3217 r = dsi_read_reg(dsidev, DSI_TIMING2);
3218 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
3219 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
3220 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
3221 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
3222 dsi_write_reg(dsidev, DSI_TIMING2, r);
3223
3224 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3225
3226 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3227 total_ticks,
3228 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3229 (total_ticks * 1000) / (fck / 1000 / 1000));
3230 }
3231
dsi_set_ta_timeout(struct platform_device * dsidev,unsigned ticks,bool x8,bool x16)3232 static void dsi_set_ta_timeout(struct platform_device *dsidev, unsigned ticks,
3233 bool x8, bool x16)
3234 {
3235 unsigned long fck;
3236 unsigned long total_ticks;
3237 u32 r;
3238
3239 BUG_ON(ticks > 0x1fff);
3240
3241 /* ticks in DSI_FCK */
3242 fck = dsi_fclk_rate(dsidev);
3243
3244 r = dsi_read_reg(dsidev, DSI_TIMING1);
3245 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
3246 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
3247 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
3248 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
3249 dsi_write_reg(dsidev, DSI_TIMING1, r);
3250
3251 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
3252
3253 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
3254 total_ticks,
3255 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
3256 (total_ticks * 1000) / (fck / 1000 / 1000));
3257 }
3258
dsi_set_stop_state_counter(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3259 static void dsi_set_stop_state_counter(struct platform_device *dsidev,
3260 unsigned ticks, bool x4, bool x16)
3261 {
3262 unsigned long fck;
3263 unsigned long total_ticks;
3264 u32 r;
3265
3266 BUG_ON(ticks > 0x1fff);
3267
3268 /* ticks in DSI_FCK */
3269 fck = dsi_fclk_rate(dsidev);
3270
3271 r = dsi_read_reg(dsidev, DSI_TIMING1);
3272 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
3273 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
3274 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
3275 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
3276 dsi_write_reg(dsidev, DSI_TIMING1, r);
3277
3278 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3279
3280 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
3281 total_ticks,
3282 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3283 (total_ticks * 1000) / (fck / 1000 / 1000));
3284 }
3285
dsi_set_hs_tx_timeout(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3286 static void dsi_set_hs_tx_timeout(struct platform_device *dsidev,
3287 unsigned ticks, bool x4, bool x16)
3288 {
3289 unsigned long fck;
3290 unsigned long total_ticks;
3291 u32 r;
3292
3293 BUG_ON(ticks > 0x1fff);
3294
3295 /* ticks in TxByteClkHS */
3296 fck = dsi_get_txbyteclkhs(dsidev);
3297
3298 r = dsi_read_reg(dsidev, DSI_TIMING2);
3299 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3300 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3301 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3302 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3303 dsi_write_reg(dsidev, DSI_TIMING2, r);
3304
3305 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3306
3307 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3308 total_ticks,
3309 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3310 (total_ticks * 1000) / (fck / 1000 / 1000));
3311 }
3312
dsi_config_vp_num_line_buffers(struct platform_device * dsidev)3313 static void dsi_config_vp_num_line_buffers(struct platform_device *dsidev)
3314 {
3315 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3316 int num_line_buffers;
3317
3318 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3319 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3320 struct omap_video_timings *timings = &dsi->timings;
3321 /*
3322 * Don't use line buffers if width is greater than the video
3323 * port's line buffer size
3324 */
3325 if (dsi->line_buffer_size <= timings->x_res * bpp / 8)
3326 num_line_buffers = 0;
3327 else
3328 num_line_buffers = 2;
3329 } else {
3330 /* Use maximum number of line buffers in command mode */
3331 num_line_buffers = 2;
3332 }
3333
3334 /* LINE_BUFFER */
3335 REG_FLD_MOD(dsidev, DSI_CTRL, num_line_buffers, 13, 12);
3336 }
3337
dsi_config_vp_sync_events(struct platform_device * dsidev)3338 static void dsi_config_vp_sync_events(struct platform_device *dsidev)
3339 {
3340 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3341 bool sync_end;
3342 u32 r;
3343
3344 if (dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE)
3345 sync_end = true;
3346 else
3347 sync_end = false;
3348
3349 r = dsi_read_reg(dsidev, DSI_CTRL);
3350 r = FLD_MOD(r, 1, 9, 9); /* VP_DE_POL */
3351 r = FLD_MOD(r, 1, 10, 10); /* VP_HSYNC_POL */
3352 r = FLD_MOD(r, 1, 11, 11); /* VP_VSYNC_POL */
3353 r = FLD_MOD(r, 1, 15, 15); /* VP_VSYNC_START */
3354 r = FLD_MOD(r, sync_end, 16, 16); /* VP_VSYNC_END */
3355 r = FLD_MOD(r, 1, 17, 17); /* VP_HSYNC_START */
3356 r = FLD_MOD(r, sync_end, 18, 18); /* VP_HSYNC_END */
3357 dsi_write_reg(dsidev, DSI_CTRL, r);
3358 }
3359
dsi_config_blanking_modes(struct platform_device * dsidev)3360 static void dsi_config_blanking_modes(struct platform_device *dsidev)
3361 {
3362 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3363 int blanking_mode = dsi->vm_timings.blanking_mode;
3364 int hfp_blanking_mode = dsi->vm_timings.hfp_blanking_mode;
3365 int hbp_blanking_mode = dsi->vm_timings.hbp_blanking_mode;
3366 int hsa_blanking_mode = dsi->vm_timings.hsa_blanking_mode;
3367 u32 r;
3368
3369 /*
3370 * 0 = TX FIFO packets sent or LPS in corresponding blanking periods
3371 * 1 = Long blanking packets are sent in corresponding blanking periods
3372 */
3373 r = dsi_read_reg(dsidev, DSI_CTRL);
3374 r = FLD_MOD(r, blanking_mode, 20, 20); /* BLANKING_MODE */
3375 r = FLD_MOD(r, hfp_blanking_mode, 21, 21); /* HFP_BLANKING */
3376 r = FLD_MOD(r, hbp_blanking_mode, 22, 22); /* HBP_BLANKING */
3377 r = FLD_MOD(r, hsa_blanking_mode, 23, 23); /* HSA_BLANKING */
3378 dsi_write_reg(dsidev, DSI_CTRL, r);
3379 }
3380
3381 /*
3382 * According to section 'HS Command Mode Interleaving' in OMAP TRM, Scenario 3
3383 * results in maximum transition time for data and clock lanes to enter and
3384 * exit HS mode. Hence, this is the scenario where the least amount of command
3385 * mode data can be interleaved. We program the minimum amount of TXBYTECLKHS
3386 * clock cycles that can be used to interleave command mode data in HS so that
3387 * all scenarios are satisfied.
3388 */
dsi_compute_interleave_hs(int blank,bool ddr_alwon,int enter_hs,int exit_hs,int exiths_clk,int ddr_pre,int ddr_post)3389 static int dsi_compute_interleave_hs(int blank, bool ddr_alwon, int enter_hs,
3390 int exit_hs, int exiths_clk, int ddr_pre, int ddr_post)
3391 {
3392 int transition;
3393
3394 /*
3395 * If DDR_CLK_ALWAYS_ON is set, we need to consider HS mode transition
3396 * time of data lanes only, if it isn't set, we need to consider HS
3397 * transition time of both data and clock lanes. HS transition time
3398 * of Scenario 3 is considered.
3399 */
3400 if (ddr_alwon) {
3401 transition = enter_hs + exit_hs + max(enter_hs, 2) + 1;
3402 } else {
3403 int trans1, trans2;
3404 trans1 = ddr_pre + enter_hs + exit_hs + max(enter_hs, 2) + 1;
3405 trans2 = ddr_pre + enter_hs + exiths_clk + ddr_post + ddr_pre +
3406 enter_hs + 1;
3407 transition = max(trans1, trans2);
3408 }
3409
3410 return blank > transition ? blank - transition : 0;
3411 }
3412
3413 /*
3414 * According to section 'LP Command Mode Interleaving' in OMAP TRM, Scenario 1
3415 * results in maximum transition time for data lanes to enter and exit LP mode.
3416 * Hence, this is the scenario where the least amount of command mode data can
3417 * be interleaved. We program the minimum amount of bytes that can be
3418 * interleaved in LP so that all scenarios are satisfied.
3419 */
dsi_compute_interleave_lp(int blank,int enter_hs,int exit_hs,int lp_clk_div,int tdsi_fclk)3420 static int dsi_compute_interleave_lp(int blank, int enter_hs, int exit_hs,
3421 int lp_clk_div, int tdsi_fclk)
3422 {
3423 int trans_lp; /* time required for a LP transition, in TXBYTECLKHS */
3424 int tlp_avail; /* time left for interleaving commands, in CLKIN4DDR */
3425 int ttxclkesc; /* period of LP transmit escape clock, in CLKIN4DDR */
3426 int thsbyte_clk = 16; /* Period of TXBYTECLKHS clock, in CLKIN4DDR */
3427 int lp_inter; /* cmd mode data that can be interleaved, in bytes */
3428
3429 /* maximum LP transition time according to Scenario 1 */
3430 trans_lp = exit_hs + max(enter_hs, 2) + 1;
3431
3432 /* CLKIN4DDR = 16 * TXBYTECLKHS */
3433 tlp_avail = thsbyte_clk * (blank - trans_lp);
3434
3435 ttxclkesc = tdsi_fclk * lp_clk_div;
3436
3437 lp_inter = ((tlp_avail - 8 * thsbyte_clk - 5 * tdsi_fclk) / ttxclkesc -
3438 26) / 16;
3439
3440 return max(lp_inter, 0);
3441 }
3442
dsi_config_cmd_mode_interleaving(struct platform_device * dsidev)3443 static void dsi_config_cmd_mode_interleaving(struct platform_device *dsidev)
3444 {
3445 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3446 int blanking_mode;
3447 int hfp_blanking_mode, hbp_blanking_mode, hsa_blanking_mode;
3448 int hsa, hfp, hbp, width_bytes, bllp, lp_clk_div;
3449 int ddr_clk_pre, ddr_clk_post, enter_hs_mode_lat, exit_hs_mode_lat;
3450 int tclk_trail, ths_exit, exiths_clk;
3451 bool ddr_alwon;
3452 struct omap_video_timings *timings = &dsi->timings;
3453 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3454 int ndl = dsi->num_lanes_used - 1;
3455 int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1;
3456 int hsa_interleave_hs = 0, hsa_interleave_lp = 0;
3457 int hfp_interleave_hs = 0, hfp_interleave_lp = 0;
3458 int hbp_interleave_hs = 0, hbp_interleave_lp = 0;
3459 int bl_interleave_hs = 0, bl_interleave_lp = 0;
3460 u32 r;
3461
3462 r = dsi_read_reg(dsidev, DSI_CTRL);
3463 blanking_mode = FLD_GET(r, 20, 20);
3464 hfp_blanking_mode = FLD_GET(r, 21, 21);
3465 hbp_blanking_mode = FLD_GET(r, 22, 22);
3466 hsa_blanking_mode = FLD_GET(r, 23, 23);
3467
3468 r = dsi_read_reg(dsidev, DSI_VM_TIMING1);
3469 hbp = FLD_GET(r, 11, 0);
3470 hfp = FLD_GET(r, 23, 12);
3471 hsa = FLD_GET(r, 31, 24);
3472
3473 r = dsi_read_reg(dsidev, DSI_CLK_TIMING);
3474 ddr_clk_post = FLD_GET(r, 7, 0);
3475 ddr_clk_pre = FLD_GET(r, 15, 8);
3476
3477 r = dsi_read_reg(dsidev, DSI_VM_TIMING7);
3478 exit_hs_mode_lat = FLD_GET(r, 15, 0);
3479 enter_hs_mode_lat = FLD_GET(r, 31, 16);
3480
3481 r = dsi_read_reg(dsidev, DSI_CLK_CTRL);
3482 lp_clk_div = FLD_GET(r, 12, 0);
3483 ddr_alwon = FLD_GET(r, 13, 13);
3484
3485 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
3486 ths_exit = FLD_GET(r, 7, 0);
3487
3488 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
3489 tclk_trail = FLD_GET(r, 15, 8);
3490
3491 exiths_clk = ths_exit + tclk_trail;
3492
3493 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8);
3494 bllp = hbp + hfp + hsa + DIV_ROUND_UP(width_bytes + 6, ndl);
3495
3496 if (!hsa_blanking_mode) {
3497 hsa_interleave_hs = dsi_compute_interleave_hs(hsa, ddr_alwon,
3498 enter_hs_mode_lat, exit_hs_mode_lat,
3499 exiths_clk, ddr_clk_pre, ddr_clk_post);
3500 hsa_interleave_lp = dsi_compute_interleave_lp(hsa,
3501 enter_hs_mode_lat, exit_hs_mode_lat,
3502 lp_clk_div, dsi_fclk_hsdiv);
3503 }
3504
3505 if (!hfp_blanking_mode) {
3506 hfp_interleave_hs = dsi_compute_interleave_hs(hfp, ddr_alwon,
3507 enter_hs_mode_lat, exit_hs_mode_lat,
3508 exiths_clk, ddr_clk_pre, ddr_clk_post);
3509 hfp_interleave_lp = dsi_compute_interleave_lp(hfp,
3510 enter_hs_mode_lat, exit_hs_mode_lat,
3511 lp_clk_div, dsi_fclk_hsdiv);
3512 }
3513
3514 if (!hbp_blanking_mode) {
3515 hbp_interleave_hs = dsi_compute_interleave_hs(hbp, ddr_alwon,
3516 enter_hs_mode_lat, exit_hs_mode_lat,
3517 exiths_clk, ddr_clk_pre, ddr_clk_post);
3518
3519 hbp_interleave_lp = dsi_compute_interleave_lp(hbp,
3520 enter_hs_mode_lat, exit_hs_mode_lat,
3521 lp_clk_div, dsi_fclk_hsdiv);
3522 }
3523
3524 if (!blanking_mode) {
3525 bl_interleave_hs = dsi_compute_interleave_hs(bllp, ddr_alwon,
3526 enter_hs_mode_lat, exit_hs_mode_lat,
3527 exiths_clk, ddr_clk_pre, ddr_clk_post);
3528
3529 bl_interleave_lp = dsi_compute_interleave_lp(bllp,
3530 enter_hs_mode_lat, exit_hs_mode_lat,
3531 lp_clk_div, dsi_fclk_hsdiv);
3532 }
3533
3534 DSSDBG("DSI HS interleaving(TXBYTECLKHS) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3535 hsa_interleave_hs, hfp_interleave_hs, hbp_interleave_hs,
3536 bl_interleave_hs);
3537
3538 DSSDBG("DSI LP interleaving(bytes) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3539 hsa_interleave_lp, hfp_interleave_lp, hbp_interleave_lp,
3540 bl_interleave_lp);
3541
3542 r = dsi_read_reg(dsidev, DSI_VM_TIMING4);
3543 r = FLD_MOD(r, hsa_interleave_hs, 23, 16);
3544 r = FLD_MOD(r, hfp_interleave_hs, 15, 8);
3545 r = FLD_MOD(r, hbp_interleave_hs, 7, 0);
3546 dsi_write_reg(dsidev, DSI_VM_TIMING4, r);
3547
3548 r = dsi_read_reg(dsidev, DSI_VM_TIMING5);
3549 r = FLD_MOD(r, hsa_interleave_lp, 23, 16);
3550 r = FLD_MOD(r, hfp_interleave_lp, 15, 8);
3551 r = FLD_MOD(r, hbp_interleave_lp, 7, 0);
3552 dsi_write_reg(dsidev, DSI_VM_TIMING5, r);
3553
3554 r = dsi_read_reg(dsidev, DSI_VM_TIMING6);
3555 r = FLD_MOD(r, bl_interleave_hs, 31, 15);
3556 r = FLD_MOD(r, bl_interleave_lp, 16, 0);
3557 dsi_write_reg(dsidev, DSI_VM_TIMING6, r);
3558 }
3559
dsi_proto_config(struct platform_device * dsidev)3560 static int dsi_proto_config(struct platform_device *dsidev)
3561 {
3562 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3563 u32 r;
3564 int buswidth = 0;
3565
3566 dsi_config_tx_fifo(dsidev, DSI_FIFO_SIZE_32,
3567 DSI_FIFO_SIZE_32,
3568 DSI_FIFO_SIZE_32,
3569 DSI_FIFO_SIZE_32);
3570
3571 dsi_config_rx_fifo(dsidev, DSI_FIFO_SIZE_32,
3572 DSI_FIFO_SIZE_32,
3573 DSI_FIFO_SIZE_32,
3574 DSI_FIFO_SIZE_32);
3575
3576 /* XXX what values for the timeouts? */
3577 dsi_set_stop_state_counter(dsidev, 0x1000, false, false);
3578 dsi_set_ta_timeout(dsidev, 0x1fff, true, true);
3579 dsi_set_lp_rx_timeout(dsidev, 0x1fff, true, true);
3580 dsi_set_hs_tx_timeout(dsidev, 0x1fff, true, true);
3581
3582 switch (dsi_get_pixel_size(dsi->pix_fmt)) {
3583 case 16:
3584 buswidth = 0;
3585 break;
3586 case 18:
3587 buswidth = 1;
3588 break;
3589 case 24:
3590 buswidth = 2;
3591 break;
3592 default:
3593 BUG();
3594 return -EINVAL;
3595 }
3596
3597 r = dsi_read_reg(dsidev, DSI_CTRL);
3598 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3599 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3600 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3601 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3602 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3603 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3604 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3605 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3606 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
3607 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3608 /* DCS_CMD_CODE, 1=start, 0=continue */
3609 r = FLD_MOD(r, 0, 25, 25);
3610 }
3611
3612 dsi_write_reg(dsidev, DSI_CTRL, r);
3613
3614 dsi_config_vp_num_line_buffers(dsidev);
3615
3616 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3617 dsi_config_vp_sync_events(dsidev);
3618 dsi_config_blanking_modes(dsidev);
3619 dsi_config_cmd_mode_interleaving(dsidev);
3620 }
3621
3622 dsi_vc_initial_config(dsidev, 0);
3623 dsi_vc_initial_config(dsidev, 1);
3624 dsi_vc_initial_config(dsidev, 2);
3625 dsi_vc_initial_config(dsidev, 3);
3626
3627 return 0;
3628 }
3629
dsi_proto_timings(struct platform_device * dsidev)3630 static void dsi_proto_timings(struct platform_device *dsidev)
3631 {
3632 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3633 unsigned tlpx, tclk_zero, tclk_prepare;
3634 unsigned tclk_pre, tclk_post;
3635 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
3636 unsigned ths_trail, ths_exit;
3637 unsigned ddr_clk_pre, ddr_clk_post;
3638 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
3639 unsigned ths_eot;
3640 int ndl = dsi->num_lanes_used - 1;
3641 u32 r;
3642
3643 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
3644 ths_prepare = FLD_GET(r, 31, 24);
3645 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3646 ths_zero = ths_prepare_ths_zero - ths_prepare;
3647 ths_trail = FLD_GET(r, 15, 8);
3648 ths_exit = FLD_GET(r, 7, 0);
3649
3650 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
3651 tlpx = FLD_GET(r, 20, 16) * 2;
3652 tclk_zero = FLD_GET(r, 7, 0);
3653
3654 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
3655 tclk_prepare = FLD_GET(r, 7, 0);
3656
3657 /* min 8*UI */
3658 tclk_pre = 20;
3659 /* min 60ns + 52*UI */
3660 tclk_post = ns2ddr(dsidev, 60) + 26;
3661
3662 ths_eot = DIV_ROUND_UP(4, ndl);
3663
3664 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3665 4);
3666 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3667
3668 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3669 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3670
3671 r = dsi_read_reg(dsidev, DSI_CLK_TIMING);
3672 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3673 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3674 dsi_write_reg(dsidev, DSI_CLK_TIMING, r);
3675
3676 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3677 ddr_clk_pre,
3678 ddr_clk_post);
3679
3680 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3681 DIV_ROUND_UP(ths_prepare, 4) +
3682 DIV_ROUND_UP(ths_zero + 3, 4);
3683
3684 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3685
3686 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3687 FLD_VAL(exit_hs_mode_lat, 15, 0);
3688 dsi_write_reg(dsidev, DSI_VM_TIMING7, r);
3689
3690 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3691 enter_hs_mode_lat, exit_hs_mode_lat);
3692
3693 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3694 /* TODO: Implement a video mode check_timings function */
3695 int hsa = dsi->vm_timings.hsa;
3696 int hfp = dsi->vm_timings.hfp;
3697 int hbp = dsi->vm_timings.hbp;
3698 int vsa = dsi->vm_timings.vsa;
3699 int vfp = dsi->vm_timings.vfp;
3700 int vbp = dsi->vm_timings.vbp;
3701 int window_sync = dsi->vm_timings.window_sync;
3702 bool hsync_end;
3703 struct omap_video_timings *timings = &dsi->timings;
3704 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3705 int tl, t_he, width_bytes;
3706
3707 hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE;
3708 t_he = hsync_end ?
3709 ((hsa == 0 && ndl == 3) ? 1 : DIV_ROUND_UP(4, ndl)) : 0;
3710
3711 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8);
3712
3713 /* TL = t_HS + HSA + t_HE + HFP + ceil((WC + 6) / NDL) + HBP */
3714 tl = DIV_ROUND_UP(4, ndl) + (hsync_end ? hsa : 0) + t_he + hfp +
3715 DIV_ROUND_UP(width_bytes + 6, ndl) + hbp;
3716
3717 DSSDBG("HBP: %d, HFP: %d, HSA: %d, TL: %d TXBYTECLKHS\n", hbp,
3718 hfp, hsync_end ? hsa : 0, tl);
3719 DSSDBG("VBP: %d, VFP: %d, VSA: %d, VACT: %d lines\n", vbp, vfp,
3720 vsa, timings->y_res);
3721
3722 r = dsi_read_reg(dsidev, DSI_VM_TIMING1);
3723 r = FLD_MOD(r, hbp, 11, 0); /* HBP */
3724 r = FLD_MOD(r, hfp, 23, 12); /* HFP */
3725 r = FLD_MOD(r, hsync_end ? hsa : 0, 31, 24); /* HSA */
3726 dsi_write_reg(dsidev, DSI_VM_TIMING1, r);
3727
3728 r = dsi_read_reg(dsidev, DSI_VM_TIMING2);
3729 r = FLD_MOD(r, vbp, 7, 0); /* VBP */
3730 r = FLD_MOD(r, vfp, 15, 8); /* VFP */
3731 r = FLD_MOD(r, vsa, 23, 16); /* VSA */
3732 r = FLD_MOD(r, window_sync, 27, 24); /* WINDOW_SYNC */
3733 dsi_write_reg(dsidev, DSI_VM_TIMING2, r);
3734
3735 r = dsi_read_reg(dsidev, DSI_VM_TIMING3);
3736 r = FLD_MOD(r, timings->y_res, 14, 0); /* VACT */
3737 r = FLD_MOD(r, tl, 31, 16); /* TL */
3738 dsi_write_reg(dsidev, DSI_VM_TIMING3, r);
3739 }
3740 }
3741
dsi_configure_pins(struct omap_dss_device * dssdev,const struct omap_dsi_pin_config * pin_cfg)3742 static int dsi_configure_pins(struct omap_dss_device *dssdev,
3743 const struct omap_dsi_pin_config *pin_cfg)
3744 {
3745 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3746 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3747 int num_pins;
3748 const int *pins;
3749 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
3750 int num_lanes;
3751 int i;
3752
3753 static const enum dsi_lane_function functions[] = {
3754 DSI_LANE_CLK,
3755 DSI_LANE_DATA1,
3756 DSI_LANE_DATA2,
3757 DSI_LANE_DATA3,
3758 DSI_LANE_DATA4,
3759 };
3760
3761 num_pins = pin_cfg->num_pins;
3762 pins = pin_cfg->pins;
3763
3764 if (num_pins < 4 || num_pins > dsi->num_lanes_supported * 2
3765 || num_pins % 2 != 0)
3766 return -EINVAL;
3767
3768 for (i = 0; i < DSI_MAX_NR_LANES; ++i)
3769 lanes[i].function = DSI_LANE_UNUSED;
3770
3771 num_lanes = 0;
3772
3773 for (i = 0; i < num_pins; i += 2) {
3774 u8 lane, pol;
3775 int dx, dy;
3776
3777 dx = pins[i];
3778 dy = pins[i + 1];
3779
3780 if (dx < 0 || dx >= dsi->num_lanes_supported * 2)
3781 return -EINVAL;
3782
3783 if (dy < 0 || dy >= dsi->num_lanes_supported * 2)
3784 return -EINVAL;
3785
3786 if (dx & 1) {
3787 if (dy != dx - 1)
3788 return -EINVAL;
3789 pol = 1;
3790 } else {
3791 if (dy != dx + 1)
3792 return -EINVAL;
3793 pol = 0;
3794 }
3795
3796 lane = dx / 2;
3797
3798 lanes[lane].function = functions[i / 2];
3799 lanes[lane].polarity = pol;
3800 num_lanes++;
3801 }
3802
3803 memcpy(dsi->lanes, lanes, sizeof(dsi->lanes));
3804 dsi->num_lanes_used = num_lanes;
3805
3806 return 0;
3807 }
3808
dsi_enable_video_output(struct omap_dss_device * dssdev,int channel)3809 static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
3810 {
3811 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3812 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3813 struct omap_overlay_manager *mgr = dsi->output.manager;
3814 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3815 struct omap_dss_device *out = &dsi->output;
3816 u8 data_type;
3817 u16 word_count;
3818 int r;
3819
3820 if (out->manager == NULL) {
3821 DSSERR("failed to enable display: no output/manager\n");
3822 return -ENODEV;
3823 }
3824
3825 r = dsi_display_init_dispc(dsidev, mgr);
3826 if (r)
3827 goto err_init_dispc;
3828
3829 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3830 switch (dsi->pix_fmt) {
3831 case OMAP_DSS_DSI_FMT_RGB888:
3832 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
3833 break;
3834 case OMAP_DSS_DSI_FMT_RGB666:
3835 data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
3836 break;
3837 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
3838 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
3839 break;
3840 case OMAP_DSS_DSI_FMT_RGB565:
3841 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
3842 break;
3843 default:
3844 r = -EINVAL;
3845 goto err_pix_fmt;
3846 }
3847
3848 dsi_if_enable(dsidev, false);
3849 dsi_vc_enable(dsidev, channel, false);
3850
3851 /* MODE, 1 = video mode */
3852 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 4, 4);
3853
3854 word_count = DIV_ROUND_UP(dsi->timings.x_res * bpp, 8);
3855
3856 dsi_vc_write_long_header(dsidev, channel, data_type,
3857 word_count, 0);
3858
3859 dsi_vc_enable(dsidev, channel, true);
3860 dsi_if_enable(dsidev, true);
3861 }
3862
3863 r = dss_mgr_enable(mgr);
3864 if (r)
3865 goto err_mgr_enable;
3866
3867 return 0;
3868
3869 err_mgr_enable:
3870 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3871 dsi_if_enable(dsidev, false);
3872 dsi_vc_enable(dsidev, channel, false);
3873 }
3874 err_pix_fmt:
3875 dsi_display_uninit_dispc(dsidev, mgr);
3876 err_init_dispc:
3877 return r;
3878 }
3879
dsi_disable_video_output(struct omap_dss_device * dssdev,int channel)3880 static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel)
3881 {
3882 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3883 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3884 struct omap_overlay_manager *mgr = dsi->output.manager;
3885
3886 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3887 dsi_if_enable(dsidev, false);
3888 dsi_vc_enable(dsidev, channel, false);
3889
3890 /* MODE, 0 = command mode */
3891 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 0, 4, 4);
3892
3893 dsi_vc_enable(dsidev, channel, true);
3894 dsi_if_enable(dsidev, true);
3895 }
3896
3897 dss_mgr_disable(mgr);
3898
3899 dsi_display_uninit_dispc(dsidev, mgr);
3900 }
3901
dsi_update_screen_dispc(struct platform_device * dsidev)3902 static void dsi_update_screen_dispc(struct platform_device *dsidev)
3903 {
3904 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3905 struct omap_overlay_manager *mgr = dsi->output.manager;
3906 unsigned bytespp;
3907 unsigned bytespl;
3908 unsigned bytespf;
3909 unsigned total_len;
3910 unsigned packet_payload;
3911 unsigned packet_len;
3912 u32 l;
3913 int r;
3914 const unsigned channel = dsi->update_channel;
3915 const unsigned line_buf_size = dsi->line_buffer_size;
3916 u16 w = dsi->timings.x_res;
3917 u16 h = dsi->timings.y_res;
3918
3919 DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
3920
3921 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_VP);
3922
3923 bytespp = dsi_get_pixel_size(dsi->pix_fmt) / 8;
3924 bytespl = w * bytespp;
3925 bytespf = bytespl * h;
3926
3927 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3928 * number of lines in a packet. See errata about VP_CLK_RATIO */
3929
3930 if (bytespf < line_buf_size)
3931 packet_payload = bytespf;
3932 else
3933 packet_payload = (line_buf_size) / bytespl * bytespl;
3934
3935 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3936 total_len = (bytespf / packet_payload) * packet_len;
3937
3938 if (bytespf % packet_payload)
3939 total_len += (bytespf % packet_payload) + 1;
3940
3941 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3942 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3943
3944 dsi_vc_write_long_header(dsidev, channel, MIPI_DSI_DCS_LONG_WRITE,
3945 packet_len, 0);
3946
3947 if (dsi->te_enabled)
3948 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3949 else
3950 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3951 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3952
3953 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3954 * because DSS interrupts are not capable of waking up the CPU and the
3955 * framedone interrupt could be delayed for quite a long time. I think
3956 * the same goes for any DSS interrupts, but for some reason I have not
3957 * seen the problem anywhere else than here.
3958 */
3959 dispc_disable_sidle();
3960
3961 dsi_perf_mark_start(dsidev);
3962
3963 r = schedule_delayed_work(&dsi->framedone_timeout_work,
3964 msecs_to_jiffies(250));
3965 BUG_ON(r == 0);
3966
3967 dss_mgr_set_timings(mgr, &dsi->timings);
3968
3969 dss_mgr_start_update(mgr);
3970
3971 if (dsi->te_enabled) {
3972 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3973 * for TE is longer than the timer allows */
3974 REG_FLD_MOD(dsidev, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3975
3976 dsi_vc_send_bta(dsidev, channel);
3977
3978 #ifdef DSI_CATCH_MISSING_TE
3979 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
3980 #endif
3981 }
3982 }
3983
3984 #ifdef DSI_CATCH_MISSING_TE
dsi_te_timeout(struct timer_list * unused)3985 static void dsi_te_timeout(struct timer_list *unused)
3986 {
3987 DSSERR("TE not received for 250ms!\n");
3988 }
3989 #endif
3990
dsi_handle_framedone(struct platform_device * dsidev,int error)3991 static void dsi_handle_framedone(struct platform_device *dsidev, int error)
3992 {
3993 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3994
3995 /* SIDLEMODE back to smart-idle */
3996 dispc_enable_sidle();
3997
3998 if (dsi->te_enabled) {
3999 /* enable LP_RX_TO again after the TE */
4000 REG_FLD_MOD(dsidev, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
4001 }
4002
4003 dsi->framedone_callback(error, dsi->framedone_data);
4004
4005 if (!error)
4006 dsi_perf_show(dsidev, "DISPC");
4007 }
4008
dsi_framedone_timeout_work_callback(struct work_struct * work)4009 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
4010 {
4011 struct dsi_data *dsi = container_of(work, struct dsi_data,
4012 framedone_timeout_work.work);
4013 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
4014 * 250ms which would conflict with this timeout work. What should be
4015 * done is first cancel the transfer on the HW, and then cancel the
4016 * possibly scheduled framedone work. However, cancelling the transfer
4017 * on the HW is buggy, and would probably require resetting the whole
4018 * DSI */
4019
4020 DSSERR("Framedone not received for 250ms!\n");
4021
4022 dsi_handle_framedone(dsi->pdev, -ETIMEDOUT);
4023 }
4024
dsi_framedone_irq_callback(void * data)4025 static void dsi_framedone_irq_callback(void *data)
4026 {
4027 struct platform_device *dsidev = (struct platform_device *) data;
4028 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4029
4030 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
4031 * turns itself off. However, DSI still has the pixels in its buffers,
4032 * and is sending the data.
4033 */
4034
4035 cancel_delayed_work(&dsi->framedone_timeout_work);
4036
4037 dsi_handle_framedone(dsidev, 0);
4038 }
4039
dsi_update(struct omap_dss_device * dssdev,int channel,void (* callback)(int,void *),void * data)4040 static int dsi_update(struct omap_dss_device *dssdev, int channel,
4041 void (*callback)(int, void *), void *data)
4042 {
4043 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4044 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4045
4046 dsi_perf_mark_setup(dsidev);
4047
4048 dsi->update_channel = channel;
4049
4050 dsi->framedone_callback = callback;
4051 dsi->framedone_data = data;
4052
4053 #ifdef DSI_PERF_MEASURE
4054 dsi->update_bytes = dsi->timings.x_res * dsi->timings.y_res *
4055 dsi_get_pixel_size(dsi->pix_fmt) / 8;
4056 #endif
4057 dsi_update_screen_dispc(dsidev);
4058
4059 return 0;
4060 }
4061
4062 /* Display funcs */
4063
dsi_configure_dispc_clocks(struct platform_device * dsidev)4064 static int dsi_configure_dispc_clocks(struct platform_device *dsidev)
4065 {
4066 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4067 struct dispc_clock_info dispc_cinfo;
4068 int r;
4069 unsigned long fck;
4070
4071 fck = dsi_get_pll_hsdiv_dispc_rate(dsidev);
4072
4073 dispc_cinfo.lck_div = dsi->user_dispc_cinfo.lck_div;
4074 dispc_cinfo.pck_div = dsi->user_dispc_cinfo.pck_div;
4075
4076 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
4077 if (r) {
4078 DSSERR("Failed to calc dispc clocks\n");
4079 return r;
4080 }
4081
4082 dsi->mgr_config.clock_info = dispc_cinfo;
4083
4084 return 0;
4085 }
4086
dsi_display_init_dispc(struct platform_device * dsidev,struct omap_overlay_manager * mgr)4087 static int dsi_display_init_dispc(struct platform_device *dsidev,
4088 struct omap_overlay_manager *mgr)
4089 {
4090 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4091 int r;
4092
4093 dss_select_lcd_clk_source(mgr->id, dsi->module_id == 0 ?
4094 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC :
4095 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC);
4096
4097 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) {
4098 r = dss_mgr_register_framedone_handler(mgr,
4099 dsi_framedone_irq_callback, dsidev);
4100 if (r) {
4101 DSSERR("can't register FRAMEDONE handler\n");
4102 goto err;
4103 }
4104
4105 dsi->mgr_config.stallmode = true;
4106 dsi->mgr_config.fifohandcheck = true;
4107 } else {
4108 dsi->mgr_config.stallmode = false;
4109 dsi->mgr_config.fifohandcheck = false;
4110 }
4111
4112 /*
4113 * override interlace, logic level and edge related parameters in
4114 * omap_video_timings with default values
4115 */
4116 dsi->timings.interlace = false;
4117 dsi->timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
4118 dsi->timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
4119 dsi->timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
4120 dsi->timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
4121 dsi->timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
4122
4123 dss_mgr_set_timings(mgr, &dsi->timings);
4124
4125 r = dsi_configure_dispc_clocks(dsidev);
4126 if (r)
4127 goto err1;
4128
4129 dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
4130 dsi->mgr_config.video_port_width =
4131 dsi_get_pixel_size(dsi->pix_fmt);
4132 dsi->mgr_config.lcden_sig_polarity = 0;
4133
4134 dss_mgr_set_lcd_config(mgr, &dsi->mgr_config);
4135
4136 return 0;
4137 err1:
4138 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4139 dss_mgr_unregister_framedone_handler(mgr,
4140 dsi_framedone_irq_callback, dsidev);
4141 err:
4142 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK);
4143 return r;
4144 }
4145
dsi_display_uninit_dispc(struct platform_device * dsidev,struct omap_overlay_manager * mgr)4146 static void dsi_display_uninit_dispc(struct platform_device *dsidev,
4147 struct omap_overlay_manager *mgr)
4148 {
4149 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4150
4151 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4152 dss_mgr_unregister_framedone_handler(mgr,
4153 dsi_framedone_irq_callback, dsidev);
4154
4155 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK);
4156 }
4157
dsi_configure_dsi_clocks(struct platform_device * dsidev)4158 static int dsi_configure_dsi_clocks(struct platform_device *dsidev)
4159 {
4160 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4161 struct dss_pll_clock_info cinfo;
4162 int r;
4163
4164 cinfo = dsi->user_dsi_cinfo;
4165
4166 r = dss_pll_set_config(&dsi->pll, &cinfo);
4167 if (r) {
4168 DSSERR("Failed to set dsi clocks\n");
4169 return r;
4170 }
4171
4172 return 0;
4173 }
4174
dsi_display_init_dsi(struct platform_device * dsidev)4175 static int dsi_display_init_dsi(struct platform_device *dsidev)
4176 {
4177 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4178 int r;
4179
4180 r = dss_pll_enable(&dsi->pll);
4181 if (r)
4182 goto err0;
4183
4184 r = dsi_configure_dsi_clocks(dsidev);
4185 if (r)
4186 goto err1;
4187
4188 dss_select_dsi_clk_source(dsi->module_id, dsi->module_id == 0 ?
4189 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI :
4190 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI);
4191
4192 DSSDBG("PLL OK\n");
4193
4194 r = dsi_cio_init(dsidev);
4195 if (r)
4196 goto err2;
4197
4198 _dsi_print_reset_status(dsidev);
4199
4200 dsi_proto_timings(dsidev);
4201 dsi_set_lp_clk_divisor(dsidev);
4202
4203 if (1)
4204 _dsi_print_reset_status(dsidev);
4205
4206 r = dsi_proto_config(dsidev);
4207 if (r)
4208 goto err3;
4209
4210 /* enable interface */
4211 dsi_vc_enable(dsidev, 0, 1);
4212 dsi_vc_enable(dsidev, 1, 1);
4213 dsi_vc_enable(dsidev, 2, 1);
4214 dsi_vc_enable(dsidev, 3, 1);
4215 dsi_if_enable(dsidev, 1);
4216 dsi_force_tx_stop_mode_io(dsidev);
4217
4218 return 0;
4219 err3:
4220 dsi_cio_uninit(dsidev);
4221 err2:
4222 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK);
4223 err1:
4224 dss_pll_disable(&dsi->pll);
4225 err0:
4226 return r;
4227 }
4228
dsi_display_uninit_dsi(struct platform_device * dsidev,bool disconnect_lanes,bool enter_ulps)4229 static void dsi_display_uninit_dsi(struct platform_device *dsidev,
4230 bool disconnect_lanes, bool enter_ulps)
4231 {
4232 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4233
4234 if (enter_ulps && !dsi->ulps_enabled)
4235 dsi_enter_ulps(dsidev);
4236
4237 /* disable interface */
4238 dsi_if_enable(dsidev, 0);
4239 dsi_vc_enable(dsidev, 0, 0);
4240 dsi_vc_enable(dsidev, 1, 0);
4241 dsi_vc_enable(dsidev, 2, 0);
4242 dsi_vc_enable(dsidev, 3, 0);
4243
4244 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK);
4245 dsi_cio_uninit(dsidev);
4246 dsi_pll_uninit(dsidev, disconnect_lanes);
4247 }
4248
dsi_display_enable(struct omap_dss_device * dssdev)4249 static int dsi_display_enable(struct omap_dss_device *dssdev)
4250 {
4251 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4252 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4253 int r = 0;
4254
4255 DSSDBG("dsi_display_enable\n");
4256
4257 WARN_ON(!dsi_bus_is_locked(dsidev));
4258
4259 mutex_lock(&dsi->lock);
4260
4261 r = dsi_runtime_get(dsidev);
4262 if (r)
4263 goto err_get_dsi;
4264
4265 _dsi_initialize_irq(dsidev);
4266
4267 r = dsi_display_init_dsi(dsidev);
4268 if (r)
4269 goto err_init_dsi;
4270
4271 mutex_unlock(&dsi->lock);
4272
4273 return 0;
4274
4275 err_init_dsi:
4276 dsi_runtime_put(dsidev);
4277 err_get_dsi:
4278 mutex_unlock(&dsi->lock);
4279 DSSDBG("dsi_display_enable FAILED\n");
4280 return r;
4281 }
4282
dsi_display_disable(struct omap_dss_device * dssdev,bool disconnect_lanes,bool enter_ulps)4283 static void dsi_display_disable(struct omap_dss_device *dssdev,
4284 bool disconnect_lanes, bool enter_ulps)
4285 {
4286 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4287 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4288
4289 DSSDBG("dsi_display_disable\n");
4290
4291 WARN_ON(!dsi_bus_is_locked(dsidev));
4292
4293 mutex_lock(&dsi->lock);
4294
4295 dsi_sync_vc(dsidev, 0);
4296 dsi_sync_vc(dsidev, 1);
4297 dsi_sync_vc(dsidev, 2);
4298 dsi_sync_vc(dsidev, 3);
4299
4300 dsi_display_uninit_dsi(dsidev, disconnect_lanes, enter_ulps);
4301
4302 dsi_runtime_put(dsidev);
4303
4304 mutex_unlock(&dsi->lock);
4305 }
4306
dsi_enable_te(struct omap_dss_device * dssdev,bool enable)4307 static int dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
4308 {
4309 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4310 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4311
4312 dsi->te_enabled = enable;
4313 return 0;
4314 }
4315
4316 #ifdef PRINT_VERBOSE_VM_TIMINGS
print_dsi_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4317 static void print_dsi_vm(const char *str,
4318 const struct omap_dss_dsi_videomode_timings *t)
4319 {
4320 unsigned long byteclk = t->hsclk / 4;
4321 int bl, wc, pps, tot;
4322
4323 wc = DIV_ROUND_UP(t->hact * t->bitspp, 8);
4324 pps = DIV_ROUND_UP(wc + 6, t->ndl); /* pixel packet size */
4325 bl = t->hss + t->hsa + t->hse + t->hbp + t->hfp;
4326 tot = bl + pps;
4327
4328 #define TO_DSI_T(x) ((u32)div64_u64((u64)x * 1000000000llu, byteclk))
4329
4330 pr_debug("%s bck %lu, %u/%u/%u/%u/%u/%u = %u+%u = %u, "
4331 "%u/%u/%u/%u/%u/%u = %u + %u = %u\n",
4332 str,
4333 byteclk,
4334 t->hss, t->hsa, t->hse, t->hbp, pps, t->hfp,
4335 bl, pps, tot,
4336 TO_DSI_T(t->hss),
4337 TO_DSI_T(t->hsa),
4338 TO_DSI_T(t->hse),
4339 TO_DSI_T(t->hbp),
4340 TO_DSI_T(pps),
4341 TO_DSI_T(t->hfp),
4342
4343 TO_DSI_T(bl),
4344 TO_DSI_T(pps),
4345
4346 TO_DSI_T(tot));
4347 #undef TO_DSI_T
4348 }
4349
print_dispc_vm(const char * str,const struct omap_video_timings * t)4350 static void print_dispc_vm(const char *str, const struct omap_video_timings *t)
4351 {
4352 unsigned long pck = t->pixelclock;
4353 int hact, bl, tot;
4354
4355 hact = t->x_res;
4356 bl = t->hsw + t->hbp + t->hfp;
4357 tot = hact + bl;
4358
4359 #define TO_DISPC_T(x) ((u32)div64_u64((u64)x * 1000000000llu, pck))
4360
4361 pr_debug("%s pck %lu, %u/%u/%u/%u = %u+%u = %u, "
4362 "%u/%u/%u/%u = %u + %u = %u\n",
4363 str,
4364 pck,
4365 t->hsw, t->hbp, hact, t->hfp,
4366 bl, hact, tot,
4367 TO_DISPC_T(t->hsw),
4368 TO_DISPC_T(t->hbp),
4369 TO_DISPC_T(hact),
4370 TO_DISPC_T(t->hfp),
4371 TO_DISPC_T(bl),
4372 TO_DISPC_T(hact),
4373 TO_DISPC_T(tot));
4374 #undef TO_DISPC_T
4375 }
4376
4377 /* note: this is not quite accurate */
print_dsi_dispc_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4378 static void print_dsi_dispc_vm(const char *str,
4379 const struct omap_dss_dsi_videomode_timings *t)
4380 {
4381 struct omap_video_timings vm = { 0 };
4382 unsigned long byteclk = t->hsclk / 4;
4383 unsigned long pck;
4384 u64 dsi_tput;
4385 int dsi_hact, dsi_htot;
4386
4387 dsi_tput = (u64)byteclk * t->ndl * 8;
4388 pck = (u32)div64_u64(dsi_tput, t->bitspp);
4389 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(t->hact * t->bitspp, 8) + 6, t->ndl);
4390 dsi_htot = t->hss + t->hsa + t->hse + t->hbp + dsi_hact + t->hfp;
4391
4392 vm.pixelclock = pck;
4393 vm.hsw = div64_u64((u64)(t->hsa + t->hse) * pck, byteclk);
4394 vm.hbp = div64_u64((u64)t->hbp * pck, byteclk);
4395 vm.hfp = div64_u64((u64)t->hfp * pck, byteclk);
4396 vm.x_res = t->hact;
4397
4398 print_dispc_vm(str, &vm);
4399 }
4400 #endif /* PRINT_VERBOSE_VM_TIMINGS */
4401
dsi_cm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4402 static bool dsi_cm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4403 unsigned long pck, void *data)
4404 {
4405 struct dsi_clk_calc_ctx *ctx = data;
4406 struct omap_video_timings *t = &ctx->dispc_vm;
4407
4408 ctx->dispc_cinfo.lck_div = lckd;
4409 ctx->dispc_cinfo.pck_div = pckd;
4410 ctx->dispc_cinfo.lck = lck;
4411 ctx->dispc_cinfo.pck = pck;
4412
4413 *t = *ctx->config->timings;
4414 t->pixelclock = pck;
4415 t->x_res = ctx->config->timings->x_res;
4416 t->y_res = ctx->config->timings->y_res;
4417 t->hsw = t->hfp = t->hbp = t->vsw = 1;
4418 t->vfp = t->vbp = 0;
4419
4420 return true;
4421 }
4422
dsi_cm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4423 static bool dsi_cm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4424 void *data)
4425 {
4426 struct dsi_clk_calc_ctx *ctx = data;
4427
4428 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4429 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4430
4431 return dispc_div_calc(dispc, ctx->req_pck_min, ctx->req_pck_max,
4432 dsi_cm_calc_dispc_cb, ctx);
4433 }
4434
dsi_cm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4435 static bool dsi_cm_calc_pll_cb(int n, int m, unsigned long fint,
4436 unsigned long clkdco, void *data)
4437 {
4438 struct dsi_clk_calc_ctx *ctx = data;
4439
4440 ctx->dsi_cinfo.n = n;
4441 ctx->dsi_cinfo.m = m;
4442 ctx->dsi_cinfo.fint = fint;
4443 ctx->dsi_cinfo.clkdco = clkdco;
4444
4445 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min,
4446 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK),
4447 dsi_cm_calc_hsdiv_cb, ctx);
4448 }
4449
dsi_cm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4450 static bool dsi_cm_calc(struct dsi_data *dsi,
4451 const struct omap_dss_dsi_config *cfg,
4452 struct dsi_clk_calc_ctx *ctx)
4453 {
4454 unsigned long clkin;
4455 int bitspp, ndl;
4456 unsigned long pll_min, pll_max;
4457 unsigned long pck, txbyteclk;
4458
4459 clkin = clk_get_rate(dsi->pll.clkin);
4460 bitspp = dsi_get_pixel_size(cfg->pixel_format);
4461 ndl = dsi->num_lanes_used - 1;
4462
4463 /*
4464 * Here we should calculate minimum txbyteclk to be able to send the
4465 * frame in time, and also to handle TE. That's not very simple, though,
4466 * especially as we go to LP between each pixel packet due to HW
4467 * "feature". So let's just estimate very roughly and multiply by 1.5.
4468 */
4469 pck = cfg->timings->pixelclock;
4470 pck = pck * 3 / 2;
4471 txbyteclk = pck * bitspp / 8 / ndl;
4472
4473 memset(ctx, 0, sizeof(*ctx));
4474 ctx->dsidev = dsi->pdev;
4475 ctx->pll = &dsi->pll;
4476 ctx->config = cfg;
4477 ctx->req_pck_min = pck;
4478 ctx->req_pck_nom = pck;
4479 ctx->req_pck_max = pck * 3 / 2;
4480
4481 pll_min = max(cfg->hs_clk_min * 4, txbyteclk * 4 * 4);
4482 pll_max = cfg->hs_clk_max * 4;
4483
4484 return dss_pll_calc(ctx->pll, clkin,
4485 pll_min, pll_max,
4486 dsi_cm_calc_pll_cb, ctx);
4487 }
4488
dsi_vm_calc_blanking(struct dsi_clk_calc_ctx * ctx)4489 static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
4490 {
4491 struct dsi_data *dsi = dsi_get_dsidrv_data(ctx->dsidev);
4492 const struct omap_dss_dsi_config *cfg = ctx->config;
4493 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4494 int ndl = dsi->num_lanes_used - 1;
4495 unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4;
4496 unsigned long byteclk = hsclk / 4;
4497
4498 unsigned long dispc_pck, req_pck_min, req_pck_nom, req_pck_max;
4499 int xres;
4500 int panel_htot, panel_hbl; /* pixels */
4501 int dispc_htot, dispc_hbl; /* pixels */
4502 int dsi_htot, dsi_hact, dsi_hbl, hss, hse; /* byteclks */
4503 int hfp, hsa, hbp;
4504 const struct omap_video_timings *req_vm;
4505 struct omap_video_timings *dispc_vm;
4506 struct omap_dss_dsi_videomode_timings *dsi_vm;
4507 u64 dsi_tput, dispc_tput;
4508
4509 dsi_tput = (u64)byteclk * ndl * 8;
4510
4511 req_vm = cfg->timings;
4512 req_pck_min = ctx->req_pck_min;
4513 req_pck_max = ctx->req_pck_max;
4514 req_pck_nom = ctx->req_pck_nom;
4515
4516 dispc_pck = ctx->dispc_cinfo.pck;
4517 dispc_tput = (u64)dispc_pck * bitspp;
4518
4519 xres = req_vm->x_res;
4520
4521 panel_hbl = req_vm->hfp + req_vm->hbp + req_vm->hsw;
4522 panel_htot = xres + panel_hbl;
4523
4524 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(xres * bitspp, 8) + 6, ndl);
4525
4526 /*
4527 * When there are no line buffers, DISPC and DSI must have the
4528 * same tput. Otherwise DISPC tput needs to be higher than DSI's.
4529 */
4530 if (dsi->line_buffer_size < xres * bitspp / 8) {
4531 if (dispc_tput != dsi_tput)
4532 return false;
4533 } else {
4534 if (dispc_tput < dsi_tput)
4535 return false;
4536 }
4537
4538 /* DSI tput must be over the min requirement */
4539 if (dsi_tput < (u64)bitspp * req_pck_min)
4540 return false;
4541
4542 /* When non-burst mode, DSI tput must be below max requirement. */
4543 if (cfg->trans_mode != OMAP_DSS_DSI_BURST_MODE) {
4544 if (dsi_tput > (u64)bitspp * req_pck_max)
4545 return false;
4546 }
4547
4548 hss = DIV_ROUND_UP(4, ndl);
4549
4550 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4551 if (ndl == 3 && req_vm->hsw == 0)
4552 hse = 1;
4553 else
4554 hse = DIV_ROUND_UP(4, ndl);
4555 } else {
4556 hse = 0;
4557 }
4558
4559 /* DSI htot to match the panel's nominal pck */
4560 dsi_htot = div64_u64((u64)panel_htot * byteclk, req_pck_nom);
4561
4562 /* fail if there would be no time for blanking */
4563 if (dsi_htot < hss + hse + dsi_hact)
4564 return false;
4565
4566 /* total DSI blanking needed to achieve panel's TL */
4567 dsi_hbl = dsi_htot - dsi_hact;
4568
4569 /* DISPC htot to match the DSI TL */
4570 dispc_htot = div64_u64((u64)dsi_htot * dispc_pck, byteclk);
4571
4572 /* verify that the DSI and DISPC TLs are the same */
4573 if ((u64)dsi_htot * dispc_pck != (u64)dispc_htot * byteclk)
4574 return false;
4575
4576 dispc_hbl = dispc_htot - xres;
4577
4578 /* setup DSI videomode */
4579
4580 dsi_vm = &ctx->dsi_vm;
4581 memset(dsi_vm, 0, sizeof(*dsi_vm));
4582
4583 dsi_vm->hsclk = hsclk;
4584
4585 dsi_vm->ndl = ndl;
4586 dsi_vm->bitspp = bitspp;
4587
4588 if (cfg->trans_mode != OMAP_DSS_DSI_PULSE_MODE) {
4589 hsa = 0;
4590 } else if (ndl == 3 && req_vm->hsw == 0) {
4591 hsa = 0;
4592 } else {
4593 hsa = div64_u64((u64)req_vm->hsw * byteclk, req_pck_nom);
4594 hsa = max(hsa - hse, 1);
4595 }
4596
4597 hbp = div64_u64((u64)req_vm->hbp * byteclk, req_pck_nom);
4598 hbp = max(hbp, 1);
4599
4600 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4601 if (hfp < 1) {
4602 int t;
4603 /* we need to take cycles from hbp */
4604
4605 t = 1 - hfp;
4606 hbp = max(hbp - t, 1);
4607 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4608
4609 if (hfp < 1 && hsa > 0) {
4610 /* we need to take cycles from hsa */
4611 t = 1 - hfp;
4612 hsa = max(hsa - t, 1);
4613 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4614 }
4615 }
4616
4617 if (hfp < 1)
4618 return false;
4619
4620 dsi_vm->hss = hss;
4621 dsi_vm->hsa = hsa;
4622 dsi_vm->hse = hse;
4623 dsi_vm->hbp = hbp;
4624 dsi_vm->hact = xres;
4625 dsi_vm->hfp = hfp;
4626
4627 dsi_vm->vsa = req_vm->vsw;
4628 dsi_vm->vbp = req_vm->vbp;
4629 dsi_vm->vact = req_vm->y_res;
4630 dsi_vm->vfp = req_vm->vfp;
4631
4632 dsi_vm->trans_mode = cfg->trans_mode;
4633
4634 dsi_vm->blanking_mode = 0;
4635 dsi_vm->hsa_blanking_mode = 1;
4636 dsi_vm->hfp_blanking_mode = 1;
4637 dsi_vm->hbp_blanking_mode = 1;
4638
4639 dsi_vm->ddr_clk_always_on = cfg->ddr_clk_always_on;
4640 dsi_vm->window_sync = 4;
4641
4642 /* setup DISPC videomode */
4643
4644 dispc_vm = &ctx->dispc_vm;
4645 *dispc_vm = *req_vm;
4646 dispc_vm->pixelclock = dispc_pck;
4647
4648 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4649 hsa = div64_u64((u64)req_vm->hsw * dispc_pck,
4650 req_pck_nom);
4651 hsa = max(hsa, 1);
4652 } else {
4653 hsa = 1;
4654 }
4655
4656 hbp = div64_u64((u64)req_vm->hbp * dispc_pck, req_pck_nom);
4657 hbp = max(hbp, 1);
4658
4659 hfp = dispc_hbl - hsa - hbp;
4660 if (hfp < 1) {
4661 int t;
4662 /* we need to take cycles from hbp */
4663
4664 t = 1 - hfp;
4665 hbp = max(hbp - t, 1);
4666 hfp = dispc_hbl - hsa - hbp;
4667
4668 if (hfp < 1) {
4669 /* we need to take cycles from hsa */
4670 t = 1 - hfp;
4671 hsa = max(hsa - t, 1);
4672 hfp = dispc_hbl - hsa - hbp;
4673 }
4674 }
4675
4676 if (hfp < 1)
4677 return false;
4678
4679 dispc_vm->hfp = hfp;
4680 dispc_vm->hsw = hsa;
4681 dispc_vm->hbp = hbp;
4682
4683 return true;
4684 }
4685
4686
dsi_vm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4687 static bool dsi_vm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4688 unsigned long pck, void *data)
4689 {
4690 struct dsi_clk_calc_ctx *ctx = data;
4691
4692 ctx->dispc_cinfo.lck_div = lckd;
4693 ctx->dispc_cinfo.pck_div = pckd;
4694 ctx->dispc_cinfo.lck = lck;
4695 ctx->dispc_cinfo.pck = pck;
4696
4697 if (dsi_vm_calc_blanking(ctx) == false)
4698 return false;
4699
4700 #ifdef PRINT_VERBOSE_VM_TIMINGS
4701 print_dispc_vm("dispc", &ctx->dispc_vm);
4702 print_dsi_vm("dsi ", &ctx->dsi_vm);
4703 print_dispc_vm("req ", ctx->config->timings);
4704 print_dsi_dispc_vm("act ", &ctx->dsi_vm);
4705 #endif
4706
4707 return true;
4708 }
4709
dsi_vm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4710 static bool dsi_vm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4711 void *data)
4712 {
4713 struct dsi_clk_calc_ctx *ctx = data;
4714 unsigned long pck_max;
4715
4716 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4717 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4718
4719 /*
4720 * In burst mode we can let the dispc pck be arbitrarily high, but it
4721 * limits our scaling abilities. So for now, don't aim too high.
4722 */
4723
4724 if (ctx->config->trans_mode == OMAP_DSS_DSI_BURST_MODE)
4725 pck_max = ctx->req_pck_max + 10000000;
4726 else
4727 pck_max = ctx->req_pck_max;
4728
4729 return dispc_div_calc(dispc, ctx->req_pck_min, pck_max,
4730 dsi_vm_calc_dispc_cb, ctx);
4731 }
4732
dsi_vm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4733 static bool dsi_vm_calc_pll_cb(int n, int m, unsigned long fint,
4734 unsigned long clkdco, void *data)
4735 {
4736 struct dsi_clk_calc_ctx *ctx = data;
4737
4738 ctx->dsi_cinfo.n = n;
4739 ctx->dsi_cinfo.m = m;
4740 ctx->dsi_cinfo.fint = fint;
4741 ctx->dsi_cinfo.clkdco = clkdco;
4742
4743 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min,
4744 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK),
4745 dsi_vm_calc_hsdiv_cb, ctx);
4746 }
4747
dsi_vm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4748 static bool dsi_vm_calc(struct dsi_data *dsi,
4749 const struct omap_dss_dsi_config *cfg,
4750 struct dsi_clk_calc_ctx *ctx)
4751 {
4752 const struct omap_video_timings *t = cfg->timings;
4753 unsigned long clkin;
4754 unsigned long pll_min;
4755 unsigned long pll_max;
4756 int ndl = dsi->num_lanes_used - 1;
4757 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4758 unsigned long byteclk_min;
4759
4760 clkin = clk_get_rate(dsi->pll.clkin);
4761
4762 memset(ctx, 0, sizeof(*ctx));
4763 ctx->dsidev = dsi->pdev;
4764 ctx->pll = &dsi->pll;
4765 ctx->config = cfg;
4766
4767 /* these limits should come from the panel driver */
4768 ctx->req_pck_min = t->pixelclock - 1000;
4769 ctx->req_pck_nom = t->pixelclock;
4770 ctx->req_pck_max = t->pixelclock + 1000;
4771
4772 byteclk_min = div64_u64((u64)ctx->req_pck_min * bitspp, ndl * 8);
4773 pll_min = max(cfg->hs_clk_min * 4, byteclk_min * 4 * 4);
4774
4775 if (cfg->trans_mode == OMAP_DSS_DSI_BURST_MODE) {
4776 pll_max = cfg->hs_clk_max * 4;
4777 } else {
4778 unsigned long byteclk_max;
4779 byteclk_max = div64_u64((u64)ctx->req_pck_max * bitspp,
4780 ndl * 8);
4781
4782 pll_max = byteclk_max * 4 * 4;
4783 }
4784
4785 return dss_pll_calc(ctx->pll, clkin,
4786 pll_min, pll_max,
4787 dsi_vm_calc_pll_cb, ctx);
4788 }
4789
dsi_set_config(struct omap_dss_device * dssdev,const struct omap_dss_dsi_config * config)4790 static int dsi_set_config(struct omap_dss_device *dssdev,
4791 const struct omap_dss_dsi_config *config)
4792 {
4793 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4794 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4795 struct dsi_clk_calc_ctx ctx;
4796 bool ok;
4797 int r;
4798
4799 mutex_lock(&dsi->lock);
4800
4801 dsi->pix_fmt = config->pixel_format;
4802 dsi->mode = config->mode;
4803
4804 if (config->mode == OMAP_DSS_DSI_VIDEO_MODE)
4805 ok = dsi_vm_calc(dsi, config, &ctx);
4806 else
4807 ok = dsi_cm_calc(dsi, config, &ctx);
4808
4809 if (!ok) {
4810 DSSERR("failed to find suitable DSI clock settings\n");
4811 r = -EINVAL;
4812 goto err;
4813 }
4814
4815 dsi_pll_calc_dsi_fck(&ctx.dsi_cinfo);
4816
4817 r = dsi_lp_clock_calc(ctx.dsi_cinfo.clkout[HSDIV_DSI],
4818 config->lp_clk_min, config->lp_clk_max, &dsi->user_lp_cinfo);
4819 if (r) {
4820 DSSERR("failed to find suitable DSI LP clock settings\n");
4821 goto err;
4822 }
4823
4824 dsi->user_dsi_cinfo = ctx.dsi_cinfo;
4825 dsi->user_dispc_cinfo = ctx.dispc_cinfo;
4826
4827 dsi->timings = ctx.dispc_vm;
4828 dsi->vm_timings = ctx.dsi_vm;
4829
4830 mutex_unlock(&dsi->lock);
4831
4832 return 0;
4833 err:
4834 mutex_unlock(&dsi->lock);
4835
4836 return r;
4837 }
4838
4839 /*
4840 * Return a hardcoded channel for the DSI output. This should work for
4841 * current use cases, but this can be later expanded to either resolve
4842 * the channel in some more dynamic manner, or get the channel as a user
4843 * parameter.
4844 */
dsi_get_channel(int module_id)4845 static enum omap_channel dsi_get_channel(int module_id)
4846 {
4847 switch (omapdss_get_version()) {
4848 case OMAPDSS_VER_OMAP24xx:
4849 case OMAPDSS_VER_AM43xx:
4850 DSSWARN("DSI not supported\n");
4851 return OMAP_DSS_CHANNEL_LCD;
4852
4853 case OMAPDSS_VER_OMAP34xx_ES1:
4854 case OMAPDSS_VER_OMAP34xx_ES3:
4855 case OMAPDSS_VER_OMAP3630:
4856 case OMAPDSS_VER_AM35xx:
4857 return OMAP_DSS_CHANNEL_LCD;
4858
4859 case OMAPDSS_VER_OMAP4430_ES1:
4860 case OMAPDSS_VER_OMAP4430_ES2:
4861 case OMAPDSS_VER_OMAP4:
4862 switch (module_id) {
4863 case 0:
4864 return OMAP_DSS_CHANNEL_LCD;
4865 case 1:
4866 return OMAP_DSS_CHANNEL_LCD2;
4867 default:
4868 DSSWARN("unsupported module id\n");
4869 return OMAP_DSS_CHANNEL_LCD;
4870 }
4871
4872 case OMAPDSS_VER_OMAP5:
4873 switch (module_id) {
4874 case 0:
4875 return OMAP_DSS_CHANNEL_LCD;
4876 case 1:
4877 return OMAP_DSS_CHANNEL_LCD3;
4878 default:
4879 DSSWARN("unsupported module id\n");
4880 return OMAP_DSS_CHANNEL_LCD;
4881 }
4882
4883 default:
4884 DSSWARN("unsupported DSS version\n");
4885 return OMAP_DSS_CHANNEL_LCD;
4886 }
4887 }
4888
dsi_request_vc(struct omap_dss_device * dssdev,int * channel)4889 static int dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
4890 {
4891 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4892 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4893 int i;
4894
4895 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
4896 if (!dsi->vc[i].dssdev) {
4897 dsi->vc[i].dssdev = dssdev;
4898 *channel = i;
4899 return 0;
4900 }
4901 }
4902
4903 DSSERR("cannot get VC for display %s", dssdev->name);
4904 return -ENOSPC;
4905 }
4906
dsi_set_vc_id(struct omap_dss_device * dssdev,int channel,int vc_id)4907 static int dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
4908 {
4909 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4910 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4911
4912 if (vc_id < 0 || vc_id > 3) {
4913 DSSERR("VC ID out of range\n");
4914 return -EINVAL;
4915 }
4916
4917 if (channel < 0 || channel > 3) {
4918 DSSERR("Virtual Channel out of range\n");
4919 return -EINVAL;
4920 }
4921
4922 if (dsi->vc[channel].dssdev != dssdev) {
4923 DSSERR("Virtual Channel not allocated to display %s\n",
4924 dssdev->name);
4925 return -EINVAL;
4926 }
4927
4928 dsi->vc[channel].vc_id = vc_id;
4929
4930 return 0;
4931 }
4932
dsi_release_vc(struct omap_dss_device * dssdev,int channel)4933 static void dsi_release_vc(struct omap_dss_device *dssdev, int channel)
4934 {
4935 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4936 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4937
4938 if ((channel >= 0 && channel <= 3) &&
4939 dsi->vc[channel].dssdev == dssdev) {
4940 dsi->vc[channel].dssdev = NULL;
4941 dsi->vc[channel].vc_id = 0;
4942 }
4943 }
4944
4945
dsi_get_clocks(struct platform_device * dsidev)4946 static int dsi_get_clocks(struct platform_device *dsidev)
4947 {
4948 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4949 struct clk *clk;
4950
4951 clk = devm_clk_get(&dsidev->dev, "fck");
4952 if (IS_ERR(clk)) {
4953 DSSERR("can't get fck\n");
4954 return PTR_ERR(clk);
4955 }
4956
4957 dsi->dss_clk = clk;
4958
4959 return 0;
4960 }
4961
dsi_connect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4962 static int dsi_connect(struct omap_dss_device *dssdev,
4963 struct omap_dss_device *dst)
4964 {
4965 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4966 struct omap_overlay_manager *mgr;
4967 int r;
4968
4969 r = dsi_regulator_init(dsidev);
4970 if (r)
4971 return r;
4972
4973 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
4974 if (!mgr)
4975 return -ENODEV;
4976
4977 r = dss_mgr_connect(mgr, dssdev);
4978 if (r)
4979 return r;
4980
4981 r = omapdss_output_set_device(dssdev, dst);
4982 if (r) {
4983 DSSERR("failed to connect output to new device: %s\n",
4984 dssdev->name);
4985 dss_mgr_disconnect(mgr, dssdev);
4986 return r;
4987 }
4988
4989 return 0;
4990 }
4991
dsi_disconnect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4992 static void dsi_disconnect(struct omap_dss_device *dssdev,
4993 struct omap_dss_device *dst)
4994 {
4995 WARN_ON(dst != dssdev->dst);
4996
4997 if (dst != dssdev->dst)
4998 return;
4999
5000 omapdss_output_unset_device(dssdev);
5001
5002 if (dssdev->manager)
5003 dss_mgr_disconnect(dssdev->manager, dssdev);
5004 }
5005
5006 static const struct omapdss_dsi_ops dsi_ops = {
5007 .connect = dsi_connect,
5008 .disconnect = dsi_disconnect,
5009
5010 .bus_lock = dsi_bus_lock,
5011 .bus_unlock = dsi_bus_unlock,
5012
5013 .enable = dsi_display_enable,
5014 .disable = dsi_display_disable,
5015
5016 .enable_hs = dsi_vc_enable_hs,
5017
5018 .configure_pins = dsi_configure_pins,
5019 .set_config = dsi_set_config,
5020
5021 .enable_video_output = dsi_enable_video_output,
5022 .disable_video_output = dsi_disable_video_output,
5023
5024 .update = dsi_update,
5025
5026 .enable_te = dsi_enable_te,
5027
5028 .request_vc = dsi_request_vc,
5029 .set_vc_id = dsi_set_vc_id,
5030 .release_vc = dsi_release_vc,
5031
5032 .dcs_write = dsi_vc_dcs_write,
5033 .dcs_write_nosync = dsi_vc_dcs_write_nosync,
5034 .dcs_read = dsi_vc_dcs_read,
5035
5036 .gen_write = dsi_vc_generic_write,
5037 .gen_write_nosync = dsi_vc_generic_write_nosync,
5038 .gen_read = dsi_vc_generic_read,
5039
5040 .bta_sync = dsi_vc_send_bta_sync,
5041
5042 .set_max_rx_packet_size = dsi_vc_set_max_rx_packet_size,
5043 };
5044
dsi_init_output(struct platform_device * dsidev)5045 static void dsi_init_output(struct platform_device *dsidev)
5046 {
5047 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5048 struct omap_dss_device *out = &dsi->output;
5049
5050 out->dev = &dsidev->dev;
5051 out->id = dsi->module_id == 0 ?
5052 OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
5053
5054 out->output_type = OMAP_DISPLAY_TYPE_DSI;
5055 out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
5056 out->dispc_channel = dsi_get_channel(dsi->module_id);
5057 out->ops.dsi = &dsi_ops;
5058 out->owner = THIS_MODULE;
5059
5060 omapdss_register_output(out);
5061 }
5062
dsi_uninit_output(struct platform_device * dsidev)5063 static void dsi_uninit_output(struct platform_device *dsidev)
5064 {
5065 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5066 struct omap_dss_device *out = &dsi->output;
5067
5068 omapdss_unregister_output(out);
5069 }
5070
dsi_probe_of(struct platform_device * pdev)5071 static int dsi_probe_of(struct platform_device *pdev)
5072 {
5073 struct device_node *node = pdev->dev.of_node;
5074 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5075 struct property *prop;
5076 u32 lane_arr[10];
5077 int len, num_pins;
5078 int r, i;
5079 struct device_node *ep;
5080 struct omap_dsi_pin_config pin_cfg;
5081
5082 ep = omapdss_of_get_first_endpoint(node);
5083 if (!ep)
5084 return 0;
5085
5086 prop = of_find_property(ep, "lanes", &len);
5087 if (prop == NULL) {
5088 dev_err(&pdev->dev, "failed to find lane data\n");
5089 r = -EINVAL;
5090 goto err;
5091 }
5092
5093 num_pins = len / sizeof(u32);
5094
5095 if (num_pins < 4 || num_pins % 2 != 0 ||
5096 num_pins > dsi->num_lanes_supported * 2) {
5097 dev_err(&pdev->dev, "bad number of lanes\n");
5098 r = -EINVAL;
5099 goto err;
5100 }
5101
5102 r = of_property_read_u32_array(ep, "lanes", lane_arr, num_pins);
5103 if (r) {
5104 dev_err(&pdev->dev, "failed to read lane data\n");
5105 goto err;
5106 }
5107
5108 pin_cfg.num_pins = num_pins;
5109 for (i = 0; i < num_pins; ++i)
5110 pin_cfg.pins[i] = (int)lane_arr[i];
5111
5112 r = dsi_configure_pins(&dsi->output, &pin_cfg);
5113 if (r) {
5114 dev_err(&pdev->dev, "failed to configure pins");
5115 goto err;
5116 }
5117
5118 of_node_put(ep);
5119
5120 return 0;
5121
5122 err:
5123 of_node_put(ep);
5124 return r;
5125 }
5126
5127 static const struct dss_pll_ops dsi_pll_ops = {
5128 .enable = dsi_pll_enable,
5129 .disable = dsi_pll_disable,
5130 .set_config = dss_pll_write_config_type_a,
5131 };
5132
5133 static const struct dss_pll_hw dss_omap3_dsi_pll_hw = {
5134 .n_max = (1 << 7) - 1,
5135 .m_max = (1 << 11) - 1,
5136 .mX_max = (1 << 4) - 1,
5137 .fint_min = 750000,
5138 .fint_max = 2100000,
5139 .clkdco_low = 1000000000,
5140 .clkdco_max = 1800000000,
5141
5142 .n_msb = 7,
5143 .n_lsb = 1,
5144 .m_msb = 18,
5145 .m_lsb = 8,
5146
5147 .mX_msb[0] = 22,
5148 .mX_lsb[0] = 19,
5149 .mX_msb[1] = 26,
5150 .mX_lsb[1] = 23,
5151
5152 .has_stopmode = true,
5153 .has_freqsel = true,
5154 .has_selfreqdco = false,
5155 .has_refsel = false,
5156 };
5157
5158 static const struct dss_pll_hw dss_omap4_dsi_pll_hw = {
5159 .n_max = (1 << 8) - 1,
5160 .m_max = (1 << 12) - 1,
5161 .mX_max = (1 << 5) - 1,
5162 .fint_min = 500000,
5163 .fint_max = 2500000,
5164 .clkdco_low = 1000000000,
5165 .clkdco_max = 1800000000,
5166
5167 .n_msb = 8,
5168 .n_lsb = 1,
5169 .m_msb = 20,
5170 .m_lsb = 9,
5171
5172 .mX_msb[0] = 25,
5173 .mX_lsb[0] = 21,
5174 .mX_msb[1] = 30,
5175 .mX_lsb[1] = 26,
5176
5177 .has_stopmode = true,
5178 .has_freqsel = false,
5179 .has_selfreqdco = false,
5180 .has_refsel = false,
5181 };
5182
5183 static const struct dss_pll_hw dss_omap5_dsi_pll_hw = {
5184 .n_max = (1 << 8) - 1,
5185 .m_max = (1 << 12) - 1,
5186 .mX_max = (1 << 5) - 1,
5187 .fint_min = 150000,
5188 .fint_max = 52000000,
5189 .clkdco_low = 1000000000,
5190 .clkdco_max = 1800000000,
5191
5192 .n_msb = 8,
5193 .n_lsb = 1,
5194 .m_msb = 20,
5195 .m_lsb = 9,
5196
5197 .mX_msb[0] = 25,
5198 .mX_lsb[0] = 21,
5199 .mX_msb[1] = 30,
5200 .mX_lsb[1] = 26,
5201
5202 .has_stopmode = true,
5203 .has_freqsel = false,
5204 .has_selfreqdco = true,
5205 .has_refsel = true,
5206 };
5207
dsi_init_pll_data(struct platform_device * dsidev)5208 static int dsi_init_pll_data(struct platform_device *dsidev)
5209 {
5210 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5211 struct dss_pll *pll = &dsi->pll;
5212 struct clk *clk;
5213 int r;
5214
5215 clk = devm_clk_get(&dsidev->dev, "sys_clk");
5216 if (IS_ERR(clk)) {
5217 DSSERR("can't get sys_clk\n");
5218 return PTR_ERR(clk);
5219 }
5220
5221 pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1";
5222 pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2;
5223 pll->clkin = clk;
5224 pll->base = dsi->pll_base;
5225
5226 switch (omapdss_get_version()) {
5227 case OMAPDSS_VER_OMAP34xx_ES1:
5228 case OMAPDSS_VER_OMAP34xx_ES3:
5229 case OMAPDSS_VER_OMAP3630:
5230 case OMAPDSS_VER_AM35xx:
5231 pll->hw = &dss_omap3_dsi_pll_hw;
5232 break;
5233
5234 case OMAPDSS_VER_OMAP4430_ES1:
5235 case OMAPDSS_VER_OMAP4430_ES2:
5236 case OMAPDSS_VER_OMAP4:
5237 pll->hw = &dss_omap4_dsi_pll_hw;
5238 break;
5239
5240 case OMAPDSS_VER_OMAP5:
5241 pll->hw = &dss_omap5_dsi_pll_hw;
5242 break;
5243
5244 default:
5245 return -ENODEV;
5246 }
5247
5248 pll->ops = &dsi_pll_ops;
5249
5250 r = dss_pll_register(pll);
5251 if (r)
5252 return r;
5253
5254 return 0;
5255 }
5256
5257 /* DSI1 HW IP initialisation */
dsi_bind(struct device * dev,struct device * master,void * data)5258 static int dsi_bind(struct device *dev, struct device *master, void *data)
5259 {
5260 struct platform_device *dsidev = to_platform_device(dev);
5261 u32 rev;
5262 int r, i;
5263 struct dsi_data *dsi;
5264 struct resource *dsi_mem;
5265 struct resource *res;
5266 struct resource temp_res;
5267
5268 dsi = devm_kzalloc(&dsidev->dev, sizeof(*dsi), GFP_KERNEL);
5269 if (!dsi)
5270 return -ENOMEM;
5271
5272 dsi->pdev = dsidev;
5273 platform_set_drvdata(dsidev, dsi);
5274
5275 spin_lock_init(&dsi->irq_lock);
5276 spin_lock_init(&dsi->errors_lock);
5277 dsi->errors = 0;
5278
5279 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
5280 spin_lock_init(&dsi->irq_stats_lock);
5281 dsi->irq_stats.last_reset = jiffies;
5282 #endif
5283
5284 mutex_init(&dsi->lock);
5285 sema_init(&dsi->bus_lock, 1);
5286
5287 INIT_DEFERRABLE_WORK(&dsi->framedone_timeout_work,
5288 dsi_framedone_timeout_work_callback);
5289
5290 #ifdef DSI_CATCH_MISSING_TE
5291 timer_setup(&dsi->te_timer, dsi_te_timeout, 0);
5292 #endif
5293
5294 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "proto");
5295 if (!res) {
5296 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5297 if (!res) {
5298 DSSERR("can't get IORESOURCE_MEM DSI\n");
5299 return -EINVAL;
5300 }
5301
5302 temp_res.start = res->start;
5303 temp_res.end = temp_res.start + DSI_PROTO_SZ - 1;
5304 res = &temp_res;
5305 }
5306
5307 dsi_mem = res;
5308
5309 dsi->proto_base = devm_ioremap(&dsidev->dev, res->start,
5310 resource_size(res));
5311 if (!dsi->proto_base) {
5312 DSSERR("can't ioremap DSI protocol engine\n");
5313 return -ENOMEM;
5314 }
5315
5316 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "phy");
5317 if (!res) {
5318 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5319 if (!res) {
5320 DSSERR("can't get IORESOURCE_MEM DSI\n");
5321 return -EINVAL;
5322 }
5323
5324 temp_res.start = res->start + DSI_PHY_OFFSET;
5325 temp_res.end = temp_res.start + DSI_PHY_SZ - 1;
5326 res = &temp_res;
5327 }
5328
5329 dsi->phy_base = devm_ioremap(&dsidev->dev, res->start,
5330 resource_size(res));
5331 if (!dsi->phy_base) {
5332 DSSERR("can't ioremap DSI PHY\n");
5333 return -ENOMEM;
5334 }
5335
5336 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "pll");
5337 if (!res) {
5338 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5339 if (!res) {
5340 DSSERR("can't get IORESOURCE_MEM DSI\n");
5341 return -EINVAL;
5342 }
5343
5344 temp_res.start = res->start + DSI_PLL_OFFSET;
5345 temp_res.end = temp_res.start + DSI_PLL_SZ - 1;
5346 res = &temp_res;
5347 }
5348
5349 dsi->pll_base = devm_ioremap(&dsidev->dev, res->start,
5350 resource_size(res));
5351 if (!dsi->pll_base) {
5352 DSSERR("can't ioremap DSI PLL\n");
5353 return -ENOMEM;
5354 }
5355
5356 dsi->irq = platform_get_irq(dsi->pdev, 0);
5357 if (dsi->irq < 0) {
5358 DSSERR("platform_get_irq failed\n");
5359 return -ENODEV;
5360 }
5361
5362 r = devm_request_irq(&dsidev->dev, dsi->irq, omap_dsi_irq_handler,
5363 IRQF_SHARED, dev_name(&dsidev->dev), dsi->pdev);
5364 if (r < 0) {
5365 DSSERR("request_irq failed\n");
5366 return r;
5367 }
5368
5369 if (dsidev->dev.of_node) {
5370 const struct of_device_id *match;
5371 const struct dsi_module_id_data *d;
5372
5373 match = of_match_node(dsi_of_match, dsidev->dev.of_node);
5374 if (!match) {
5375 DSSERR("unsupported DSI module\n");
5376 return -ENODEV;
5377 }
5378
5379 d = match->data;
5380
5381 while (d->address != 0 && d->address != dsi_mem->start)
5382 d++;
5383
5384 if (d->address == 0) {
5385 DSSERR("unsupported DSI module\n");
5386 return -ENODEV;
5387 }
5388
5389 dsi->module_id = d->id;
5390 } else {
5391 dsi->module_id = dsidev->id;
5392 }
5393
5394 /* DSI VCs initialization */
5395 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
5396 dsi->vc[i].source = DSI_VC_SOURCE_L4;
5397 dsi->vc[i].dssdev = NULL;
5398 dsi->vc[i].vc_id = 0;
5399 }
5400
5401 r = dsi_get_clocks(dsidev);
5402 if (r)
5403 return r;
5404
5405 dsi_init_pll_data(dsidev);
5406
5407 pm_runtime_enable(&dsidev->dev);
5408
5409 r = dsi_runtime_get(dsidev);
5410 if (r)
5411 goto err_runtime_get;
5412
5413 rev = dsi_read_reg(dsidev, DSI_REVISION);
5414 dev_dbg(&dsidev->dev, "OMAP DSI rev %d.%d\n",
5415 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
5416
5417 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number
5418 * of data to 3 by default */
5419 if (dss_has_feature(FEAT_DSI_GNQ))
5420 /* NB_DATA_LANES */
5421 dsi->num_lanes_supported = 1 + REG_GET(dsidev, DSI_GNQ, 11, 9);
5422 else
5423 dsi->num_lanes_supported = 3;
5424
5425 dsi->line_buffer_size = dsi_get_line_buf_size(dsidev);
5426
5427 dsi_init_output(dsidev);
5428
5429 if (dsidev->dev.of_node) {
5430 r = dsi_probe_of(dsidev);
5431 if (r) {
5432 DSSERR("Invalid DSI DT data\n");
5433 goto err_probe_of;
5434 }
5435
5436 r = of_platform_populate(dsidev->dev.of_node, NULL, NULL,
5437 &dsidev->dev);
5438 if (r)
5439 DSSERR("Failed to populate DSI child devices: %d\n", r);
5440 }
5441
5442 dsi_runtime_put(dsidev);
5443
5444 if (dsi->module_id == 0)
5445 dss_debugfs_create_file("dsi1_regs", dsi1_dump_regs);
5446 else if (dsi->module_id == 1)
5447 dss_debugfs_create_file("dsi2_regs", dsi2_dump_regs);
5448
5449 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
5450 if (dsi->module_id == 0)
5451 dss_debugfs_create_file("dsi1_irqs", dsi1_dump_irqs);
5452 else if (dsi->module_id == 1)
5453 dss_debugfs_create_file("dsi2_irqs", dsi2_dump_irqs);
5454 #endif
5455
5456 return 0;
5457
5458 err_probe_of:
5459 dsi_uninit_output(dsidev);
5460 dsi_runtime_put(dsidev);
5461
5462 err_runtime_get:
5463 pm_runtime_disable(&dsidev->dev);
5464 return r;
5465 }
5466
dsi_unbind(struct device * dev,struct device * master,void * data)5467 static void dsi_unbind(struct device *dev, struct device *master, void *data)
5468 {
5469 struct platform_device *dsidev = to_platform_device(dev);
5470 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5471
5472 of_platform_depopulate(&dsidev->dev);
5473
5474 WARN_ON(dsi->scp_clk_refcount > 0);
5475
5476 dss_pll_unregister(&dsi->pll);
5477
5478 dsi_uninit_output(dsidev);
5479
5480 pm_runtime_disable(&dsidev->dev);
5481
5482 if (dsi->vdds_dsi_reg != NULL && dsi->vdds_dsi_enabled) {
5483 regulator_disable(dsi->vdds_dsi_reg);
5484 dsi->vdds_dsi_enabled = false;
5485 }
5486 }
5487
5488 static const struct component_ops dsi_component_ops = {
5489 .bind = dsi_bind,
5490 .unbind = dsi_unbind,
5491 };
5492
dsi_probe(struct platform_device * pdev)5493 static int dsi_probe(struct platform_device *pdev)
5494 {
5495 return component_add(&pdev->dev, &dsi_component_ops);
5496 }
5497
dsi_remove(struct platform_device * pdev)5498 static void dsi_remove(struct platform_device *pdev)
5499 {
5500 component_del(&pdev->dev, &dsi_component_ops);
5501 }
5502
dsi_runtime_suspend(struct device * dev)5503 static int dsi_runtime_suspend(struct device *dev)
5504 {
5505 struct platform_device *pdev = to_platform_device(dev);
5506 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5507
5508 dsi->is_enabled = false;
5509 /* ensure the irq handler sees the is_enabled value */
5510 smp_wmb();
5511 /* wait for current handler to finish before turning the DSI off */
5512 synchronize_irq(dsi->irq);
5513
5514 dispc_runtime_put();
5515
5516 return 0;
5517 }
5518
dsi_runtime_resume(struct device * dev)5519 static int dsi_runtime_resume(struct device *dev)
5520 {
5521 struct platform_device *pdev = to_platform_device(dev);
5522 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5523 int r;
5524
5525 r = dispc_runtime_get();
5526 if (r)
5527 return r;
5528
5529 dsi->is_enabled = true;
5530 /* ensure the irq handler sees the is_enabled value */
5531 smp_wmb();
5532
5533 return 0;
5534 }
5535
5536 static const struct dev_pm_ops dsi_pm_ops = {
5537 .runtime_suspend = dsi_runtime_suspend,
5538 .runtime_resume = dsi_runtime_resume,
5539 };
5540
5541 static const struct dsi_module_id_data dsi_of_data_omap3[] = {
5542 { .address = 0x4804fc00, .id = 0, },
5543 { },
5544 };
5545
5546 static const struct dsi_module_id_data dsi_of_data_omap4[] = {
5547 { .address = 0x58004000, .id = 0, },
5548 { .address = 0x58005000, .id = 1, },
5549 { },
5550 };
5551
5552 static const struct dsi_module_id_data dsi_of_data_omap5[] = {
5553 { .address = 0x58004000, .id = 0, },
5554 { .address = 0x58009000, .id = 1, },
5555 { },
5556 };
5557
5558 static const struct of_device_id dsi_of_match[] = {
5559 { .compatible = "ti,omap3-dsi", .data = dsi_of_data_omap3, },
5560 { .compatible = "ti,omap4-dsi", .data = dsi_of_data_omap4, },
5561 { .compatible = "ti,omap5-dsi", .data = dsi_of_data_omap5, },
5562 {},
5563 };
5564
5565 static struct platform_driver omap_dsihw_driver = {
5566 .probe = dsi_probe,
5567 .remove_new = dsi_remove,
5568 .driver = {
5569 .name = "omapdss_dsi",
5570 .pm = &dsi_pm_ops,
5571 .of_match_table = dsi_of_match,
5572 .suppress_bind_attrs = true,
5573 },
5574 };
5575
dsi_init_platform_driver(void)5576 int __init dsi_init_platform_driver(void)
5577 {
5578 return platform_driver_register(&omap_dsihw_driver);
5579 }
5580
dsi_uninit_platform_driver(void)5581 void dsi_uninit_platform_driver(void)
5582 {
5583 platform_driver_unregister(&omap_dsihw_driver);
5584 }
5585