1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
5 */
6
7 #include <linux/clk.h>
8 #include <linux/component.h>
9 #include <linux/debugfs.h>
10 #include <linux/hdmi.h>
11 #include <linux/module.h>
12 #include <linux/io.h>
13 #include <linux/platform_device.h>
14 #include <linux/reset.h>
15
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_bridge.h>
18 #include <drm/drm_debugfs.h>
19 #include <drm/drm_drv.h>
20 #include <drm/drm_edid.h>
21 #include <drm/drm_file.h>
22 #include <drm/drm_print.h>
23 #include <drm/drm_probe_helper.h>
24
25 #include <sound/hdmi-codec.h>
26
27 #include "sti_hdmi.h"
28 #include "sti_hdmi_tx3g4c28phy.h"
29 #include "sti_vtg.h"
30
31 #define HDMI_CFG 0x0000
32 #define HDMI_INT_EN 0x0004
33 #define HDMI_INT_STA 0x0008
34 #define HDMI_INT_CLR 0x000C
35 #define HDMI_STA 0x0010
36 #define HDMI_ACTIVE_VID_XMIN 0x0100
37 #define HDMI_ACTIVE_VID_XMAX 0x0104
38 #define HDMI_ACTIVE_VID_YMIN 0x0108
39 #define HDMI_ACTIVE_VID_YMAX 0x010C
40 #define HDMI_DFLT_CHL0_DAT 0x0110
41 #define HDMI_DFLT_CHL1_DAT 0x0114
42 #define HDMI_DFLT_CHL2_DAT 0x0118
43 #define HDMI_AUDIO_CFG 0x0200
44 #define HDMI_SPDIF_FIFO_STATUS 0x0204
45 #define HDMI_SW_DI_1_HEAD_WORD 0x0210
46 #define HDMI_SW_DI_1_PKT_WORD0 0x0214
47 #define HDMI_SW_DI_1_PKT_WORD1 0x0218
48 #define HDMI_SW_DI_1_PKT_WORD2 0x021C
49 #define HDMI_SW_DI_1_PKT_WORD3 0x0220
50 #define HDMI_SW_DI_1_PKT_WORD4 0x0224
51 #define HDMI_SW_DI_1_PKT_WORD5 0x0228
52 #define HDMI_SW_DI_1_PKT_WORD6 0x022C
53 #define HDMI_SW_DI_CFG 0x0230
54 #define HDMI_SAMPLE_FLAT_MASK 0x0244
55 #define HDMI_AUDN 0x0400
56 #define HDMI_AUD_CTS 0x0404
57 #define HDMI_SW_DI_2_HEAD_WORD 0x0600
58 #define HDMI_SW_DI_2_PKT_WORD0 0x0604
59 #define HDMI_SW_DI_2_PKT_WORD1 0x0608
60 #define HDMI_SW_DI_2_PKT_WORD2 0x060C
61 #define HDMI_SW_DI_2_PKT_WORD3 0x0610
62 #define HDMI_SW_DI_2_PKT_WORD4 0x0614
63 #define HDMI_SW_DI_2_PKT_WORD5 0x0618
64 #define HDMI_SW_DI_2_PKT_WORD6 0x061C
65 #define HDMI_SW_DI_3_HEAD_WORD 0x0620
66 #define HDMI_SW_DI_3_PKT_WORD0 0x0624
67 #define HDMI_SW_DI_3_PKT_WORD1 0x0628
68 #define HDMI_SW_DI_3_PKT_WORD2 0x062C
69 #define HDMI_SW_DI_3_PKT_WORD3 0x0630
70 #define HDMI_SW_DI_3_PKT_WORD4 0x0634
71 #define HDMI_SW_DI_3_PKT_WORD5 0x0638
72 #define HDMI_SW_DI_3_PKT_WORD6 0x063C
73
74 #define HDMI_IFRAME_SLOT_AVI 1
75 #define HDMI_IFRAME_SLOT_AUDIO 2
76 #define HDMI_IFRAME_SLOT_VENDOR 3
77
78 #define XCAT(prefix, x, suffix) prefix ## x ## suffix
79 #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
80 #define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
81 #define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
82 #define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
83 #define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
84 #define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
85 #define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
86 #define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
87
88 #define HDMI_SW_DI_MAX_WORD 7
89
90 #define HDMI_IFRAME_DISABLED 0x0
91 #define HDMI_IFRAME_SINGLE_SHOT 0x1
92 #define HDMI_IFRAME_FIELD 0x2
93 #define HDMI_IFRAME_FRAME 0x3
94 #define HDMI_IFRAME_MASK 0x3
95 #define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
96
97 #define HDMI_CFG_DEVICE_EN BIT(0)
98 #define HDMI_CFG_HDMI_NOT_DVI BIT(1)
99 #define HDMI_CFG_HDCP_EN BIT(2)
100 #define HDMI_CFG_ESS_NOT_OESS BIT(3)
101 #define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
102 #define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
103 #define HDMI_CFG_422_EN BIT(8)
104 #define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
105 #define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
106 #define HDMI_CFG_SW_RST_EN BIT(31)
107
108 #define HDMI_INT_GLOBAL BIT(0)
109 #define HDMI_INT_SW_RST BIT(1)
110 #define HDMI_INT_PIX_CAP BIT(3)
111 #define HDMI_INT_HOT_PLUG BIT(4)
112 #define HDMI_INT_DLL_LCK BIT(5)
113 #define HDMI_INT_NEW_FRAME BIT(6)
114 #define HDMI_INT_GENCTRL_PKT BIT(7)
115 #define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
116 #define HDMI_INT_SINK_TERM_PRESENT BIT(11)
117
118 #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
119 | HDMI_INT_DLL_LCK \
120 | HDMI_INT_HOT_PLUG \
121 | HDMI_INT_GLOBAL)
122
123 #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
124 | HDMI_INT_AUDIO_FIFO_XRUN \
125 | HDMI_INT_GENCTRL_PKT \
126 | HDMI_INT_NEW_FRAME \
127 | HDMI_INT_DLL_LCK \
128 | HDMI_INT_HOT_PLUG \
129 | HDMI_INT_PIX_CAP \
130 | HDMI_INT_SW_RST \
131 | HDMI_INT_GLOBAL)
132
133 #define HDMI_STA_SW_RST BIT(1)
134
135 #define HDMI_AUD_CFG_8CH BIT(0)
136 #define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
137 #define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
138 #define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
139 #define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
140 #define HDMI_AUD_CFG_DTS_INVALID BIT(16)
141 #define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
142 #define HDMI_AUD_CFG_CH12_VALID BIT(28)
143 #define HDMI_AUD_CFG_CH34_VALID BIT(29)
144 #define HDMI_AUD_CFG_CH56_VALID BIT(30)
145 #define HDMI_AUD_CFG_CH78_VALID BIT(31)
146
147 /* sample flat mask */
148 #define HDMI_SAMPLE_FLAT_NO 0
149 #define HDMI_SAMPLE_FLAT_SP0 BIT(0)
150 #define HDMI_SAMPLE_FLAT_SP1 BIT(1)
151 #define HDMI_SAMPLE_FLAT_SP2 BIT(2)
152 #define HDMI_SAMPLE_FLAT_SP3 BIT(3)
153 #define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
154 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
155
156 #define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
157 #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
158 #define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
159
160 struct sti_hdmi_connector {
161 struct drm_connector drm_connector;
162 struct drm_encoder *encoder;
163 struct sti_hdmi *hdmi;
164 struct drm_property *colorspace_property;
165 };
166
167 #define to_sti_hdmi_connector(x) \
168 container_of(x, struct sti_hdmi_connector, drm_connector)
169
170 static const struct drm_prop_enum_list colorspace_mode_names[] = {
171 { HDMI_COLORSPACE_RGB, "rgb" },
172 { HDMI_COLORSPACE_YUV422, "yuv422" },
173 { HDMI_COLORSPACE_YUV444, "yuv444" },
174 };
175
hdmi_read(struct sti_hdmi * hdmi,int offset)176 u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
177 {
178 return readl(hdmi->regs + offset);
179 }
180
hdmi_write(struct sti_hdmi * hdmi,u32 val,int offset)181 void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
182 {
183 writel(val, hdmi->regs + offset);
184 }
185
186 /*
187 * HDMI interrupt handler threaded
188 *
189 * @irq: irq number
190 * @arg: connector structure
191 */
hdmi_irq_thread(int irq,void * arg)192 static irqreturn_t hdmi_irq_thread(int irq, void *arg)
193 {
194 struct sti_hdmi *hdmi = arg;
195
196 /* Hot plug/unplug IRQ */
197 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
198 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
199 if (hdmi->drm_dev)
200 drm_helper_hpd_irq_event(hdmi->drm_dev);
201 }
202
203 /* Sw reset and PLL lock are exclusive so we can use the same
204 * event to signal them
205 */
206 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
207 hdmi->event_received = true;
208 wake_up_interruptible(&hdmi->wait_event);
209 }
210
211 /* Audio FIFO underrun IRQ */
212 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
213 DRM_INFO("Warning: audio FIFO underrun occurs!\n");
214
215 return IRQ_HANDLED;
216 }
217
218 /*
219 * HDMI interrupt handler
220 *
221 * @irq: irq number
222 * @arg: connector structure
223 */
hdmi_irq(int irq,void * arg)224 static irqreturn_t hdmi_irq(int irq, void *arg)
225 {
226 struct sti_hdmi *hdmi = arg;
227
228 /* read interrupt status */
229 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
230
231 /* clear interrupt status */
232 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
233
234 /* force sync bus write */
235 hdmi_read(hdmi, HDMI_INT_STA);
236
237 return IRQ_WAKE_THREAD;
238 }
239
240 /*
241 * Set hdmi active area depending on the drm display mode selected
242 *
243 * @hdmi: pointer on the hdmi internal structure
244 */
hdmi_active_area(struct sti_hdmi * hdmi)245 static void hdmi_active_area(struct sti_hdmi *hdmi)
246 {
247 u32 xmin, xmax;
248 u32 ymin, ymax;
249
250 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
251 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
252 ymin = sti_vtg_get_line_number(hdmi->mode, 0);
253 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
254
255 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
256 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
257 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
258 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
259 }
260
261 /*
262 * Overall hdmi configuration
263 *
264 * @hdmi: pointer on the hdmi internal structure
265 */
hdmi_config(struct sti_hdmi * hdmi)266 static void hdmi_config(struct sti_hdmi *hdmi)
267 {
268 u32 conf;
269
270 DRM_DEBUG_DRIVER("\n");
271
272 /* Clear overrun and underrun fifo */
273 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
274
275 /* Select encryption type and the framing mode */
276 conf |= HDMI_CFG_ESS_NOT_OESS;
277 if (hdmi->hdmi_monitor)
278 conf |= HDMI_CFG_HDMI_NOT_DVI;
279
280 /* Set Hsync polarity */
281 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
282 DRM_DEBUG_DRIVER("H Sync Negative\n");
283 conf |= HDMI_CFG_H_SYNC_POL_NEG;
284 }
285
286 /* Set Vsync polarity */
287 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
288 DRM_DEBUG_DRIVER("V Sync Negative\n");
289 conf |= HDMI_CFG_V_SYNC_POL_NEG;
290 }
291
292 /* Enable HDMI */
293 conf |= HDMI_CFG_DEVICE_EN;
294
295 hdmi_write(hdmi, conf, HDMI_CFG);
296 }
297
298 /*
299 * Helper to reset info frame
300 *
301 * @hdmi: pointer on the hdmi internal structure
302 * @slot: infoframe to reset
303 */
hdmi_infoframe_reset(struct sti_hdmi * hdmi,u32 slot)304 static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
305 u32 slot)
306 {
307 u32 val, i;
308 u32 head_offset, pack_offset;
309
310 switch (slot) {
311 case HDMI_IFRAME_SLOT_AVI:
312 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
313 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
314 break;
315 case HDMI_IFRAME_SLOT_AUDIO:
316 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
317 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
318 break;
319 case HDMI_IFRAME_SLOT_VENDOR:
320 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
321 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
322 break;
323 default:
324 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
325 return;
326 }
327
328 /* Disable transmission for the selected slot */
329 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
330 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
331 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
332
333 /* Reset info frame registers */
334 hdmi_write(hdmi, 0x0, head_offset);
335 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
336 hdmi_write(hdmi, 0x0, pack_offset + i);
337 }
338
339 /*
340 * Helper to concatenate infoframe in 32 bits word
341 *
342 * @ptr: pointer on the hdmi internal structure
343 * @size: size to write
344 */
hdmi_infoframe_subpack(const u8 * ptr,size_t size)345 static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
346 {
347 unsigned long value = 0;
348 size_t i;
349
350 for (i = size; i > 0; i--)
351 value = (value << 8) | ptr[i - 1];
352
353 return value;
354 }
355
356 /*
357 * Helper to write info frame
358 *
359 * @hdmi: pointer on the hdmi internal structure
360 * @data: infoframe to write
361 * @size: size to write
362 */
hdmi_infoframe_write_infopack(struct sti_hdmi * hdmi,const u8 * data,size_t size)363 static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
364 const u8 *data,
365 size_t size)
366 {
367 const u8 *ptr = data;
368 u32 val, slot, mode, i;
369 u32 head_offset, pack_offset;
370
371 switch (*ptr) {
372 case HDMI_INFOFRAME_TYPE_AVI:
373 slot = HDMI_IFRAME_SLOT_AVI;
374 mode = HDMI_IFRAME_FIELD;
375 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
376 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
377 break;
378 case HDMI_INFOFRAME_TYPE_AUDIO:
379 slot = HDMI_IFRAME_SLOT_AUDIO;
380 mode = HDMI_IFRAME_FRAME;
381 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
382 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
383 break;
384 case HDMI_INFOFRAME_TYPE_VENDOR:
385 slot = HDMI_IFRAME_SLOT_VENDOR;
386 mode = HDMI_IFRAME_FRAME;
387 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
388 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
389 break;
390 default:
391 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
392 return;
393 }
394
395 /* Disable transmission slot for updated infoframe */
396 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
397 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
398 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
399
400 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
401 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
402 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
403 writel(val, hdmi->regs + head_offset);
404
405 /*
406 * Each subpack contains 4 bytes
407 * The First Bytes of the first subpacket must contain the checksum
408 * Packet size is increase by one.
409 */
410 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
411 for (i = 0; i < size; i += sizeof(u32)) {
412 size_t num;
413
414 num = min_t(size_t, size - i, sizeof(u32));
415 val = hdmi_infoframe_subpack(ptr, num);
416 ptr += sizeof(u32);
417 writel(val, hdmi->regs + pack_offset + i);
418 }
419
420 /* Enable transmission slot for updated infoframe */
421 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
422 val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
423 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
424 }
425
426 /*
427 * Prepare and configure the AVI infoframe
428 *
429 * AVI infoframe are transmitted at least once per two video field and
430 * contains information about HDMI transmission mode such as color space,
431 * colorimetry, ...
432 *
433 * @hdmi: pointer on the hdmi internal structure
434 *
435 * Return negative value if error occurs
436 */
hdmi_avi_infoframe_config(struct sti_hdmi * hdmi)437 static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
438 {
439 struct drm_display_mode *mode = &hdmi->mode;
440 struct hdmi_avi_infoframe infoframe;
441 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
442 int ret;
443
444 DRM_DEBUG_DRIVER("\n");
445
446 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe,
447 hdmi->drm_connector, mode);
448 if (ret < 0) {
449 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
450 return ret;
451 }
452
453 /* fixed infoframe configuration not linked to the mode */
454 infoframe.colorspace = hdmi->colorspace;
455 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
456 infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
457
458 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
459 if (ret < 0) {
460 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
461 return ret;
462 }
463
464 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
465
466 return 0;
467 }
468
469 /*
470 * Prepare and configure the AUDIO infoframe
471 *
472 * AUDIO infoframe are transmitted once per frame and
473 * contains information about HDMI transmission mode such as audio codec,
474 * sample size, ...
475 *
476 * @hdmi: pointer on the hdmi internal structure
477 *
478 * Return negative value if error occurs
479 */
hdmi_audio_infoframe_config(struct sti_hdmi * hdmi)480 static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
481 {
482 struct hdmi_audio_params *audio = &hdmi->audio;
483 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
484 int ret, val;
485
486 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
487 audio->enabled ? "enable" : "disable");
488 if (audio->enabled) {
489 /* set audio parameters stored*/
490 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
491 sizeof(buffer));
492 if (ret < 0) {
493 DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
494 return ret;
495 }
496 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
497 } else {
498 /*disable audio info frame transmission */
499 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
500 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
501 HDMI_IFRAME_SLOT_AUDIO);
502 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
503 }
504
505 return 0;
506 }
507
508 /*
509 * Prepare and configure the VS infoframe
510 *
511 * Vendor Specific infoframe are transmitted once per frame and
512 * contains vendor specific information.
513 *
514 * @hdmi: pointer on the hdmi internal structure
515 *
516 * Return negative value if error occurs
517 */
518 #define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
hdmi_vendor_infoframe_config(struct sti_hdmi * hdmi)519 static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
520 {
521 struct drm_display_mode *mode = &hdmi->mode;
522 struct hdmi_vendor_infoframe infoframe;
523 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
524 int ret;
525
526 DRM_DEBUG_DRIVER("\n");
527
528 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe,
529 hdmi->drm_connector,
530 mode);
531 if (ret < 0) {
532 /*
533 * Going into that statement does not means vendor infoframe
534 * fails. It just informed us that vendor infoframe is not
535 * needed for the selected mode. Only 4k or stereoscopic 3D
536 * mode requires vendor infoframe. So just simply return 0.
537 */
538 return 0;
539 }
540
541 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
542 if (ret < 0) {
543 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
544 return ret;
545 }
546
547 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
548
549 return 0;
550 }
551
552 #define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
553
554 /*
555 * Software reset of the hdmi subsystem
556 *
557 * @hdmi: pointer on the hdmi internal structure
558 *
559 */
hdmi_swreset(struct sti_hdmi * hdmi)560 static void hdmi_swreset(struct sti_hdmi *hdmi)
561 {
562 u32 val;
563
564 DRM_DEBUG_DRIVER("\n");
565
566 /* Enable hdmi_audio clock only during hdmi reset */
567 if (clk_prepare_enable(hdmi->clk_audio))
568 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
569
570 /* Sw reset */
571 hdmi->event_received = false;
572
573 val = hdmi_read(hdmi, HDMI_CFG);
574 val |= HDMI_CFG_SW_RST_EN;
575 hdmi_write(hdmi, val, HDMI_CFG);
576
577 /* Wait reset completed */
578 wait_event_interruptible_timeout(hdmi->wait_event,
579 hdmi->event_received,
580 msecs_to_jiffies
581 (HDMI_TIMEOUT_SWRESET));
582
583 /*
584 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
585 * set to '1' and clk_audio is running.
586 */
587 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
588 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
589
590 val = hdmi_read(hdmi, HDMI_CFG);
591 val &= ~HDMI_CFG_SW_RST_EN;
592 hdmi_write(hdmi, val, HDMI_CFG);
593
594 /* Disable hdmi_audio clock. Not used anymore for drm purpose */
595 clk_disable_unprepare(hdmi->clk_audio);
596 }
597
598 #define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
599 #define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
600 #define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \
601 hdmi_read(hdmi, reg))
602 #define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
603
hdmi_dbg_cfg(struct seq_file * s,int val)604 static void hdmi_dbg_cfg(struct seq_file *s, int val)
605 {
606 int tmp;
607
608 seq_putc(s, '\t');
609 tmp = val & HDMI_CFG_HDMI_NOT_DVI;
610 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
611 seq_puts(s, "\t\t\t\t\t");
612 tmp = val & HDMI_CFG_HDCP_EN;
613 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
614 seq_puts(s, "\t\t\t\t\t");
615 tmp = val & HDMI_CFG_ESS_NOT_OESS;
616 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
617 seq_puts(s, "\t\t\t\t\t");
618 tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
619 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
620 seq_puts(s, "\t\t\t\t\t");
621 tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
622 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
623 seq_puts(s, "\t\t\t\t\t");
624 tmp = val & HDMI_CFG_422_EN;
625 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
626 }
627
hdmi_dbg_sta(struct seq_file * s,int val)628 static void hdmi_dbg_sta(struct seq_file *s, int val)
629 {
630 int tmp;
631
632 seq_putc(s, '\t');
633 tmp = (val & HDMI_STA_DLL_LCK);
634 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
635 seq_puts(s, "\t\t\t\t\t");
636 tmp = (val & HDMI_STA_HOT_PLUG);
637 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
638 }
639
hdmi_dbg_sw_di_cfg(struct seq_file * s,int val)640 static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
641 {
642 int tmp;
643 char *const en_di[] = {"no transmission",
644 "single transmission",
645 "once every field",
646 "once every frame"};
647
648 seq_putc(s, '\t');
649 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
650 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
651 seq_puts(s, "\t\t\t\t\t");
652 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
653 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
654 seq_puts(s, "\t\t\t\t\t");
655 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
656 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
657 seq_puts(s, "\t\t\t\t\t");
658 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
659 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
660 seq_puts(s, "\t\t\t\t\t");
661 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
662 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
663 seq_puts(s, "\t\t\t\t\t");
664 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
665 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
666 }
667
hdmi_dbg_show(struct seq_file * s,void * data)668 static int hdmi_dbg_show(struct seq_file *s, void *data)
669 {
670 struct drm_info_node *node = s->private;
671 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
672
673 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
674 DBGFS_DUMP("\n", HDMI_CFG);
675 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
676 DBGFS_DUMP("", HDMI_INT_EN);
677 DBGFS_DUMP("\n", HDMI_STA);
678 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
679 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
680 seq_putc(s, '\t');
681 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
682 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
683 seq_putc(s, '\t');
684 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
685 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
686 seq_putc(s, '\t');
687 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
688 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
689 seq_putc(s, '\t');
690 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
691 DBGFS_DUMP("", HDMI_SW_DI_CFG);
692 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
693
694 DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
695 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
696 DBGFS_DUMP("\n", HDMI_AUDN);
697
698 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
699 HDMI_IFRAME_SLOT_AVI);
700 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
701 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
702 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
703 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
704 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
705 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
706 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
707 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
708 seq_printf(s, "\n\n AUDIO Infoframe (Data Island slot N=%d):",
709 HDMI_IFRAME_SLOT_AUDIO);
710 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
711 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
712 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
713 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
714 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
715 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
716 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
717 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
718 seq_printf(s, "\n\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
719 HDMI_IFRAME_SLOT_VENDOR);
720 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
721 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
722 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
723 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
724 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
725 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
726 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
727 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
728 seq_putc(s, '\n');
729 return 0;
730 }
731
732 static struct drm_info_list hdmi_debugfs_files[] = {
733 { "hdmi", hdmi_dbg_show, 0, NULL },
734 };
735
hdmi_debugfs_init(struct sti_hdmi * hdmi,struct drm_minor * minor)736 static void hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
737 {
738 unsigned int i;
739
740 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
741 hdmi_debugfs_files[i].data = hdmi;
742
743 drm_debugfs_create_files(hdmi_debugfs_files,
744 ARRAY_SIZE(hdmi_debugfs_files),
745 minor->debugfs_root, minor);
746 }
747
sti_hdmi_disable(struct drm_bridge * bridge)748 static void sti_hdmi_disable(struct drm_bridge *bridge)
749 {
750 struct sti_hdmi *hdmi = bridge->driver_private;
751
752 u32 val = hdmi_read(hdmi, HDMI_CFG);
753
754 if (!hdmi->enabled)
755 return;
756
757 DRM_DEBUG_DRIVER("\n");
758
759 /* Disable HDMI */
760 val &= ~HDMI_CFG_DEVICE_EN;
761 hdmi_write(hdmi, val, HDMI_CFG);
762
763 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
764
765 /* Stop the phy */
766 hdmi->phy_ops->stop(hdmi);
767
768 /* Reset info frame transmission */
769 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
770 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
771 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
772
773 /* Set the default channel data to be a dark red */
774 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
775 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
776 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
777
778 /* Disable/unprepare hdmi clock */
779 clk_disable_unprepare(hdmi->clk_phy);
780 clk_disable_unprepare(hdmi->clk_tmds);
781 clk_disable_unprepare(hdmi->clk_pix);
782
783 hdmi->enabled = false;
784
785 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
786 }
787
788 /*
789 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
790 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
791 * same source (drifts between clocks). In this case assumption is that CTS is
792 * automatically calculated by hardware.
793 *
794 * @audio_fs: audio frame clock frequency in Hz
795 *
796 * Values computed are based on table described in HDMI specification 1.4b
797 *
798 * Returns n value.
799 */
sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)800 static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
801 {
802 unsigned int n;
803
804 switch (audio_fs) {
805 case 32000:
806 n = 4096;
807 break;
808 case 44100:
809 n = 6272;
810 break;
811 case 48000:
812 n = 6144;
813 break;
814 case 88200:
815 n = 6272 * 2;
816 break;
817 case 96000:
818 n = 6144 * 2;
819 break;
820 case 176400:
821 n = 6272 * 4;
822 break;
823 case 192000:
824 n = 6144 * 4;
825 break;
826 default:
827 /* Not pre-defined, recommended value: 128 * fs / 1000 */
828 n = (audio_fs * 128) / 1000;
829 }
830
831 return n;
832 }
833
hdmi_audio_configure(struct sti_hdmi * hdmi)834 static int hdmi_audio_configure(struct sti_hdmi *hdmi)
835 {
836 int audio_cfg, n;
837 struct hdmi_audio_params *params = &hdmi->audio;
838 struct hdmi_audio_infoframe *info = ¶ms->cea;
839
840 DRM_DEBUG_DRIVER("\n");
841
842 if (!hdmi->enabled)
843 return 0;
844
845 /* update N parameter */
846 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
847
848 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
849 params->sample_rate, hdmi->mode.clock * 1000, n);
850 hdmi_write(hdmi, n, HDMI_AUDN);
851
852 /* update HDMI registers according to configuration */
853 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
854 HDMI_AUD_CFG_ONE_BIT_INVALID;
855
856 switch (info->channels) {
857 case 8:
858 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
859 fallthrough;
860 case 6:
861 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
862 fallthrough;
863 case 4:
864 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
865 fallthrough;
866 case 2:
867 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
868 break;
869 default:
870 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
871 info->channels);
872 return -EINVAL;
873 }
874
875 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
876
877 return hdmi_audio_infoframe_config(hdmi);
878 }
879
sti_hdmi_pre_enable(struct drm_bridge * bridge)880 static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
881 {
882 struct sti_hdmi *hdmi = bridge->driver_private;
883
884 DRM_DEBUG_DRIVER("\n");
885
886 if (hdmi->enabled)
887 return;
888
889 /* Prepare/enable clocks */
890 if (clk_prepare_enable(hdmi->clk_pix))
891 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
892 if (clk_prepare_enable(hdmi->clk_tmds))
893 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
894 if (clk_prepare_enable(hdmi->clk_phy))
895 DRM_ERROR("Failed to prepare/enable hdmi_rejection_pll clk\n");
896
897 hdmi->enabled = true;
898
899 /* Program hdmi serializer and start phy */
900 if (!hdmi->phy_ops->start(hdmi)) {
901 DRM_ERROR("Unable to start hdmi phy\n");
902 return;
903 }
904
905 /* Program hdmi active area */
906 hdmi_active_area(hdmi);
907
908 /* Enable working interrupts */
909 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
910
911 /* Program hdmi config */
912 hdmi_config(hdmi);
913
914 /* Program AVI infoframe */
915 if (hdmi_avi_infoframe_config(hdmi))
916 DRM_ERROR("Unable to configure AVI infoframe\n");
917
918 if (hdmi->audio.enabled) {
919 if (hdmi_audio_configure(hdmi))
920 DRM_ERROR("Unable to configure audio\n");
921 } else {
922 hdmi_audio_infoframe_config(hdmi);
923 }
924
925 /* Program VS infoframe */
926 if (hdmi_vendor_infoframe_config(hdmi))
927 DRM_ERROR("Unable to configure VS infoframe\n");
928
929 /* Sw reset */
930 hdmi_swreset(hdmi);
931 }
932
sti_hdmi_set_mode(struct drm_bridge * bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)933 static void sti_hdmi_set_mode(struct drm_bridge *bridge,
934 const struct drm_display_mode *mode,
935 const struct drm_display_mode *adjusted_mode)
936 {
937 struct sti_hdmi *hdmi = bridge->driver_private;
938 int ret;
939
940 DRM_DEBUG_DRIVER("\n");
941
942 /* Copy the drm display mode in the connector local structure */
943 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
944
945 /* Update clock framerate according to the selected mode */
946 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
947 if (ret < 0) {
948 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
949 mode->clock * 1000);
950 return;
951 }
952 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
953 if (ret < 0) {
954 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
955 mode->clock * 1000);
956 return;
957 }
958 }
959
sti_hdmi_bridge_nope(struct drm_bridge * bridge)960 static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
961 {
962 /* do nothing */
963 }
964
965 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
966 .pre_enable = sti_hdmi_pre_enable,
967 .enable = sti_hdmi_bridge_nope,
968 .disable = sti_hdmi_disable,
969 .post_disable = sti_hdmi_bridge_nope,
970 .mode_set = sti_hdmi_set_mode,
971 };
972
sti_hdmi_connector_get_modes(struct drm_connector * connector)973 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
974 {
975 struct sti_hdmi_connector *hdmi_connector
976 = to_sti_hdmi_connector(connector);
977 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
978 struct edid *edid;
979 int count;
980
981 DRM_DEBUG_DRIVER("\n");
982
983 edid = drm_get_edid(connector, hdmi->ddc_adapt);
984 if (!edid)
985 goto fail;
986
987 hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
988 DRM_DEBUG_KMS("%s : %dx%d cm\n",
989 (hdmi->hdmi_monitor ? "hdmi monitor" : "dvi monitor"),
990 edid->width_cm, edid->height_cm);
991 cec_notifier_set_phys_addr_from_edid(hdmi->notifier, edid);
992
993 count = drm_add_edid_modes(connector, edid);
994 drm_connector_update_edid_property(connector, edid);
995
996 kfree(edid);
997 return count;
998
999 fail:
1000 DRM_ERROR("Can't read HDMI EDID\n");
1001 return 0;
1002 }
1003
1004 #define CLK_TOLERANCE_HZ 50
1005
sti_hdmi_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)1006 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
1007 struct drm_display_mode *mode)
1008 {
1009 int target = mode->clock * 1000;
1010 int target_min = target - CLK_TOLERANCE_HZ;
1011 int target_max = target + CLK_TOLERANCE_HZ;
1012 int result;
1013 struct sti_hdmi_connector *hdmi_connector
1014 = to_sti_hdmi_connector(connector);
1015 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1016
1017
1018 result = clk_round_rate(hdmi->clk_pix, target);
1019
1020 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
1021 target, result);
1022
1023 if ((result < target_min) || (result > target_max)) {
1024 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
1025 return MODE_BAD;
1026 }
1027
1028 return MODE_OK;
1029 }
1030
1031 static const
1032 struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
1033 .get_modes = sti_hdmi_connector_get_modes,
1034 .mode_valid = sti_hdmi_connector_mode_valid,
1035 };
1036
1037 /* get detection status of display device */
1038 static enum drm_connector_status
sti_hdmi_connector_detect(struct drm_connector * connector,bool force)1039 sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
1040 {
1041 struct sti_hdmi_connector *hdmi_connector
1042 = to_sti_hdmi_connector(connector);
1043 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1044
1045 DRM_DEBUG_DRIVER("\n");
1046
1047 if (hdmi->hpd) {
1048 DRM_DEBUG_DRIVER("hdmi cable connected\n");
1049 return connector_status_connected;
1050 }
1051
1052 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
1053 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
1054 return connector_status_disconnected;
1055 }
1056
sti_hdmi_connector_init_property(struct drm_device * drm_dev,struct drm_connector * connector)1057 static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
1058 struct drm_connector *connector)
1059 {
1060 struct sti_hdmi_connector *hdmi_connector
1061 = to_sti_hdmi_connector(connector);
1062 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1063 struct drm_property *prop;
1064
1065 /* colorspace property */
1066 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
1067 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
1068 colorspace_mode_names,
1069 ARRAY_SIZE(colorspace_mode_names));
1070 if (!prop) {
1071 DRM_ERROR("fails to create colorspace property\n");
1072 return;
1073 }
1074 hdmi_connector->colorspace_property = prop;
1075 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
1076 }
1077
1078 static int
sti_hdmi_connector_set_property(struct drm_connector * connector,struct drm_connector_state * state,struct drm_property * property,uint64_t val)1079 sti_hdmi_connector_set_property(struct drm_connector *connector,
1080 struct drm_connector_state *state,
1081 struct drm_property *property,
1082 uint64_t val)
1083 {
1084 struct sti_hdmi_connector *hdmi_connector
1085 = to_sti_hdmi_connector(connector);
1086 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1087
1088 if (property == hdmi_connector->colorspace_property) {
1089 hdmi->colorspace = val;
1090 return 0;
1091 }
1092
1093 DRM_ERROR("failed to set hdmi connector property\n");
1094 return -EINVAL;
1095 }
1096
1097 static int
sti_hdmi_connector_get_property(struct drm_connector * connector,const struct drm_connector_state * state,struct drm_property * property,uint64_t * val)1098 sti_hdmi_connector_get_property(struct drm_connector *connector,
1099 const struct drm_connector_state *state,
1100 struct drm_property *property,
1101 uint64_t *val)
1102 {
1103 struct sti_hdmi_connector *hdmi_connector
1104 = to_sti_hdmi_connector(connector);
1105 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1106
1107 if (property == hdmi_connector->colorspace_property) {
1108 *val = hdmi->colorspace;
1109 return 0;
1110 }
1111
1112 DRM_ERROR("failed to get hdmi connector property\n");
1113 return -EINVAL;
1114 }
1115
sti_hdmi_late_register(struct drm_connector * connector)1116 static int sti_hdmi_late_register(struct drm_connector *connector)
1117 {
1118 struct sti_hdmi_connector *hdmi_connector
1119 = to_sti_hdmi_connector(connector);
1120 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1121
1122 hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary);
1123
1124 return 0;
1125 }
1126
1127 static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1128 .fill_modes = drm_helper_probe_single_connector_modes,
1129 .detect = sti_hdmi_connector_detect,
1130 .destroy = drm_connector_cleanup,
1131 .reset = drm_atomic_helper_connector_reset,
1132 .atomic_set_property = sti_hdmi_connector_set_property,
1133 .atomic_get_property = sti_hdmi_connector_get_property,
1134 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1135 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1136 .late_register = sti_hdmi_late_register,
1137 };
1138
sti_hdmi_find_encoder(struct drm_device * dev)1139 static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1140 {
1141 struct drm_encoder *encoder;
1142
1143 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1144 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1145 return encoder;
1146 }
1147
1148 return NULL;
1149 }
1150
hdmi_audio_shutdown(struct device * dev,void * data)1151 static void hdmi_audio_shutdown(struct device *dev, void *data)
1152 {
1153 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1154 int audio_cfg;
1155
1156 DRM_DEBUG_DRIVER("\n");
1157
1158 /* disable audio */
1159 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1160 HDMI_AUD_CFG_ONE_BIT_INVALID;
1161 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1162
1163 hdmi->audio.enabled = false;
1164 hdmi_audio_infoframe_config(hdmi);
1165 }
1166
hdmi_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)1167 static int hdmi_audio_hw_params(struct device *dev,
1168 void *data,
1169 struct hdmi_codec_daifmt *daifmt,
1170 struct hdmi_codec_params *params)
1171 {
1172 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1173 int ret;
1174
1175 DRM_DEBUG_DRIVER("\n");
1176
1177 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1178 daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1179 daifmt->frame_clk_master) {
1180 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1181 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1182 daifmt->bit_clk_master,
1183 daifmt->frame_clk_master);
1184 return -EINVAL;
1185 }
1186
1187 hdmi->audio.sample_width = params->sample_width;
1188 hdmi->audio.sample_rate = params->sample_rate;
1189 hdmi->audio.cea = params->cea;
1190
1191 hdmi->audio.enabled = true;
1192
1193 ret = hdmi_audio_configure(hdmi);
1194 if (ret < 0)
1195 return ret;
1196
1197 return 0;
1198 }
1199
hdmi_audio_mute(struct device * dev,void * data,bool enable,int direction)1200 static int hdmi_audio_mute(struct device *dev, void *data,
1201 bool enable, int direction)
1202 {
1203 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1204
1205 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1206
1207 if (enable)
1208 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1209 else
1210 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1211
1212 return 0;
1213 }
1214
hdmi_audio_get_eld(struct device * dev,void * data,uint8_t * buf,size_t len)1215 static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1216 {
1217 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1218 struct drm_connector *connector = hdmi->drm_connector;
1219
1220 DRM_DEBUG_DRIVER("\n");
1221 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1222
1223 return 0;
1224 }
1225
1226 static const struct hdmi_codec_ops audio_codec_ops = {
1227 .hw_params = hdmi_audio_hw_params,
1228 .audio_shutdown = hdmi_audio_shutdown,
1229 .mute_stream = hdmi_audio_mute,
1230 .get_eld = hdmi_audio_get_eld,
1231 .no_capture_mute = 1,
1232 };
1233
sti_hdmi_register_audio_driver(struct device * dev,struct sti_hdmi * hdmi)1234 static int sti_hdmi_register_audio_driver(struct device *dev,
1235 struct sti_hdmi *hdmi)
1236 {
1237 struct hdmi_codec_pdata codec_data = {
1238 .ops = &audio_codec_ops,
1239 .max_i2s_channels = 8,
1240 .i2s = 1,
1241 };
1242
1243 DRM_DEBUG_DRIVER("\n");
1244
1245 hdmi->audio.enabled = false;
1246
1247 hdmi->audio_pdev = platform_device_register_data(
1248 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1249 &codec_data, sizeof(codec_data));
1250
1251 if (IS_ERR(hdmi->audio_pdev))
1252 return PTR_ERR(hdmi->audio_pdev);
1253
1254 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1255
1256 return 0;
1257 }
1258
sti_hdmi_bind(struct device * dev,struct device * master,void * data)1259 static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1260 {
1261 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1262 struct drm_device *drm_dev = data;
1263 struct drm_encoder *encoder;
1264 struct sti_hdmi_connector *connector;
1265 struct cec_connector_info conn_info;
1266 struct drm_connector *drm_connector;
1267 struct drm_bridge *bridge;
1268 int err;
1269
1270 /* Set the drm device handle */
1271 hdmi->drm_dev = drm_dev;
1272
1273 encoder = sti_hdmi_find_encoder(drm_dev);
1274 if (!encoder)
1275 return -EINVAL;
1276
1277 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1278 if (!connector)
1279 return -EINVAL;
1280
1281 connector->hdmi = hdmi;
1282
1283 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1284 if (!bridge)
1285 return -EINVAL;
1286
1287 bridge->driver_private = hdmi;
1288 bridge->funcs = &sti_hdmi_bridge_funcs;
1289 drm_bridge_attach(encoder, bridge, NULL, 0);
1290
1291 connector->encoder = encoder;
1292
1293 drm_connector = (struct drm_connector *)connector;
1294
1295 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1296
1297 drm_connector_init_with_ddc(drm_dev, drm_connector,
1298 &sti_hdmi_connector_funcs,
1299 DRM_MODE_CONNECTOR_HDMIA,
1300 hdmi->ddc_adapt);
1301 drm_connector_helper_add(drm_connector,
1302 &sti_hdmi_connector_helper_funcs);
1303
1304 /* initialise property */
1305 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1306
1307 hdmi->drm_connector = drm_connector;
1308
1309 err = drm_connector_attach_encoder(drm_connector, encoder);
1310 if (err) {
1311 DRM_ERROR("Failed to attach a connector to a encoder\n");
1312 goto err_sysfs;
1313 }
1314
1315 err = sti_hdmi_register_audio_driver(dev, hdmi);
1316 if (err) {
1317 DRM_ERROR("Failed to attach an audio codec\n");
1318 goto err_sysfs;
1319 }
1320
1321 /* Initialize audio infoframe */
1322 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1323 if (err) {
1324 DRM_ERROR("Failed to init audio infoframe\n");
1325 goto err_sysfs;
1326 }
1327
1328 cec_fill_conn_info_from_drm(&conn_info, drm_connector);
1329 hdmi->notifier = cec_notifier_conn_register(&hdmi->dev, NULL,
1330 &conn_info);
1331 if (!hdmi->notifier) {
1332 hdmi->drm_connector = NULL;
1333 return -ENOMEM;
1334 }
1335
1336 /* Enable default interrupts */
1337 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1338
1339 return 0;
1340
1341 err_sysfs:
1342 hdmi->drm_connector = NULL;
1343 return -EINVAL;
1344 }
1345
sti_hdmi_unbind(struct device * dev,struct device * master,void * data)1346 static void sti_hdmi_unbind(struct device *dev,
1347 struct device *master, void *data)
1348 {
1349 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1350
1351 cec_notifier_conn_unregister(hdmi->notifier);
1352 }
1353
1354 static const struct component_ops sti_hdmi_ops = {
1355 .bind = sti_hdmi_bind,
1356 .unbind = sti_hdmi_unbind,
1357 };
1358
1359 static const struct of_device_id hdmi_of_match[] = {
1360 {
1361 .compatible = "st,stih407-hdmi",
1362 .data = &tx3g4c28phy_ops,
1363 }, {
1364 /* end node */
1365 }
1366 };
1367 MODULE_DEVICE_TABLE(of, hdmi_of_match);
1368
sti_hdmi_probe(struct platform_device * pdev)1369 static int sti_hdmi_probe(struct platform_device *pdev)
1370 {
1371 struct device *dev = &pdev->dev;
1372 struct sti_hdmi *hdmi;
1373 struct device_node *np = dev->of_node;
1374 struct resource *res;
1375 struct device_node *ddc;
1376 int ret;
1377
1378 DRM_INFO("%s\n", __func__);
1379
1380 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1381 if (!hdmi)
1382 return -ENOMEM;
1383
1384 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1385 if (ddc) {
1386 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1387 of_node_put(ddc);
1388 if (!hdmi->ddc_adapt)
1389 return -EPROBE_DEFER;
1390 }
1391
1392 hdmi->dev = pdev->dev;
1393
1394 /* Get resources */
1395 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1396 if (!res) {
1397 DRM_ERROR("Invalid hdmi resource\n");
1398 ret = -ENOMEM;
1399 goto release_adapter;
1400 }
1401 hdmi->regs = devm_ioremap(dev, res->start, resource_size(res));
1402 if (!hdmi->regs) {
1403 ret = -ENOMEM;
1404 goto release_adapter;
1405 }
1406
1407 hdmi->phy_ops = (struct hdmi_phy_ops *)
1408 of_match_node(hdmi_of_match, np)->data;
1409
1410 /* Get clock resources */
1411 hdmi->clk_pix = devm_clk_get(dev, "pix");
1412 if (IS_ERR(hdmi->clk_pix)) {
1413 DRM_ERROR("Cannot get hdmi_pix clock\n");
1414 ret = PTR_ERR(hdmi->clk_pix);
1415 goto release_adapter;
1416 }
1417
1418 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1419 if (IS_ERR(hdmi->clk_tmds)) {
1420 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1421 ret = PTR_ERR(hdmi->clk_tmds);
1422 goto release_adapter;
1423 }
1424
1425 hdmi->clk_phy = devm_clk_get(dev, "phy");
1426 if (IS_ERR(hdmi->clk_phy)) {
1427 DRM_ERROR("Cannot get hdmi_phy clock\n");
1428 ret = PTR_ERR(hdmi->clk_phy);
1429 goto release_adapter;
1430 }
1431
1432 hdmi->clk_audio = devm_clk_get(dev, "audio");
1433 if (IS_ERR(hdmi->clk_audio)) {
1434 DRM_ERROR("Cannot get hdmi_audio clock\n");
1435 ret = PTR_ERR(hdmi->clk_audio);
1436 goto release_adapter;
1437 }
1438
1439 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1440
1441 init_waitqueue_head(&hdmi->wait_event);
1442
1443 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1444 if (hdmi->irq < 0) {
1445 DRM_ERROR("Cannot get HDMI irq\n");
1446 ret = hdmi->irq;
1447 goto release_adapter;
1448 }
1449
1450 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1451 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1452 if (ret) {
1453 DRM_ERROR("Failed to register HDMI interrupt\n");
1454 goto release_adapter;
1455 }
1456
1457 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1458 /* Take hdmi out of reset */
1459 if (!IS_ERR(hdmi->reset))
1460 reset_control_deassert(hdmi->reset);
1461
1462 platform_set_drvdata(pdev, hdmi);
1463
1464 return component_add(&pdev->dev, &sti_hdmi_ops);
1465
1466 release_adapter:
1467 i2c_put_adapter(hdmi->ddc_adapt);
1468
1469 return ret;
1470 }
1471
sti_hdmi_remove(struct platform_device * pdev)1472 static int sti_hdmi_remove(struct platform_device *pdev)
1473 {
1474 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1475
1476 i2c_put_adapter(hdmi->ddc_adapt);
1477 if (hdmi->audio_pdev)
1478 platform_device_unregister(hdmi->audio_pdev);
1479 component_del(&pdev->dev, &sti_hdmi_ops);
1480
1481 return 0;
1482 }
1483
1484 struct platform_driver sti_hdmi_driver = {
1485 .driver = {
1486 .name = "sti-hdmi",
1487 .owner = THIS_MODULE,
1488 .of_match_table = hdmi_of_match,
1489 },
1490 .probe = sti_hdmi_probe,
1491 .remove = sti_hdmi_remove,
1492 };
1493
1494 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1495 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1496 MODULE_LICENSE("GPL");
1497