1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5 * Fabien Dessenne <fabien.dessenne@st.com>
6 * for STMicroelectronics.
7 */
8
9 #include <linux/dma-mapping.h>
10 #include <linux/seq_file.h>
11
12 #include <drm/drm_atomic.h>
13 #include <drm/drm_device.h>
14 #include <drm/drm_fb_cma_helper.h>
15 #include <drm/drm_fourcc.h>
16 #include <drm/drm_gem_cma_helper.h>
17
18 #include "sti_compositor.h"
19 #include "sti_gdp.h"
20 #include "sti_plane.h"
21 #include "sti_vtg.h"
22
23 #define ALPHASWITCH BIT(6)
24 #define ENA_COLOR_FILL BIT(8)
25 #define BIGNOTLITTLE BIT(23)
26 #define WAIT_NEXT_VSYNC BIT(31)
27
28 /* GDP color formats */
29 #define GDP_RGB565 0x00
30 #define GDP_RGB888 0x01
31 #define GDP_RGB888_32 0x02
32 #define GDP_XBGR8888 (GDP_RGB888_32 | BIGNOTLITTLE | ALPHASWITCH)
33 #define GDP_ARGB8565 0x04
34 #define GDP_ARGB8888 0x05
35 #define GDP_ABGR8888 (GDP_ARGB8888 | BIGNOTLITTLE | ALPHASWITCH)
36 #define GDP_ARGB1555 0x06
37 #define GDP_ARGB4444 0x07
38
39 #define GDP2STR(fmt) { GDP_ ## fmt, #fmt }
40
41 static struct gdp_format_to_str {
42 int format;
43 char name[20];
44 } gdp_format_to_str[] = {
45 GDP2STR(RGB565),
46 GDP2STR(RGB888),
47 GDP2STR(RGB888_32),
48 GDP2STR(XBGR8888),
49 GDP2STR(ARGB8565),
50 GDP2STR(ARGB8888),
51 GDP2STR(ABGR8888),
52 GDP2STR(ARGB1555),
53 GDP2STR(ARGB4444)
54 };
55
56 #define GAM_GDP_CTL_OFFSET 0x00
57 #define GAM_GDP_AGC_OFFSET 0x04
58 #define GAM_GDP_VPO_OFFSET 0x0C
59 #define GAM_GDP_VPS_OFFSET 0x10
60 #define GAM_GDP_PML_OFFSET 0x14
61 #define GAM_GDP_PMP_OFFSET 0x18
62 #define GAM_GDP_SIZE_OFFSET 0x1C
63 #define GAM_GDP_NVN_OFFSET 0x24
64 #define GAM_GDP_KEY1_OFFSET 0x28
65 #define GAM_GDP_KEY2_OFFSET 0x2C
66 #define GAM_GDP_PPT_OFFSET 0x34
67 #define GAM_GDP_CML_OFFSET 0x3C
68 #define GAM_GDP_MST_OFFSET 0x68
69
70 #define GAM_GDP_ALPHARANGE_255 BIT(5)
71 #define GAM_GDP_AGC_FULL_RANGE 0x00808080
72 #define GAM_GDP_PPT_IGNORE (BIT(1) | BIT(0))
73
74 #define GAM_GDP_SIZE_MAX_WIDTH 3840
75 #define GAM_GDP_SIZE_MAX_HEIGHT 2160
76
77 #define GDP_NODE_NB_BANK 2
78 #define GDP_NODE_PER_FIELD 2
79
80 struct sti_gdp_node {
81 u32 gam_gdp_ctl;
82 u32 gam_gdp_agc;
83 u32 reserved1;
84 u32 gam_gdp_vpo;
85 u32 gam_gdp_vps;
86 u32 gam_gdp_pml;
87 u32 gam_gdp_pmp;
88 u32 gam_gdp_size;
89 u32 reserved2;
90 u32 gam_gdp_nvn;
91 u32 gam_gdp_key1;
92 u32 gam_gdp_key2;
93 u32 reserved3;
94 u32 gam_gdp_ppt;
95 u32 reserved4;
96 u32 gam_gdp_cml;
97 };
98
99 struct sti_gdp_node_list {
100 struct sti_gdp_node *top_field;
101 dma_addr_t top_field_paddr;
102 struct sti_gdp_node *btm_field;
103 dma_addr_t btm_field_paddr;
104 };
105
106 /*
107 * STI GDP structure
108 *
109 * @sti_plane: sti_plane structure
110 * @dev: driver device
111 * @regs: gdp registers
112 * @clk_pix: pixel clock for the current gdp
113 * @clk_main_parent: gdp parent clock if main path used
114 * @clk_aux_parent: gdp parent clock if aux path used
115 * @vtg_field_nb: callback for VTG FIELD (top or bottom) notification
116 * @is_curr_top: true if the current node processed is the top field
117 * @node_list: array of node list
118 * @vtg: registered vtg
119 */
120 struct sti_gdp {
121 struct sti_plane plane;
122 struct device *dev;
123 void __iomem *regs;
124 struct clk *clk_pix;
125 struct clk *clk_main_parent;
126 struct clk *clk_aux_parent;
127 struct notifier_block vtg_field_nb;
128 bool is_curr_top;
129 struct sti_gdp_node_list node_list[GDP_NODE_NB_BANK];
130 struct sti_vtg *vtg;
131 };
132
133 #define to_sti_gdp(x) container_of(x, struct sti_gdp, plane)
134
135 static const uint32_t gdp_supported_formats[] = {
136 DRM_FORMAT_XRGB8888,
137 DRM_FORMAT_XBGR8888,
138 DRM_FORMAT_ARGB8888,
139 DRM_FORMAT_ABGR8888,
140 DRM_FORMAT_ARGB4444,
141 DRM_FORMAT_ARGB1555,
142 DRM_FORMAT_RGB565,
143 DRM_FORMAT_RGB888,
144 };
145
146 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
147 readl(gdp->regs + reg ## _OFFSET))
148
gdp_dbg_ctl(struct seq_file * s,int val)149 static void gdp_dbg_ctl(struct seq_file *s, int val)
150 {
151 int i;
152
153 seq_puts(s, "\tColor:");
154 for (i = 0; i < ARRAY_SIZE(gdp_format_to_str); i++) {
155 if (gdp_format_to_str[i].format == (val & 0x1F)) {
156 seq_puts(s, gdp_format_to_str[i].name);
157 break;
158 }
159 }
160 if (i == ARRAY_SIZE(gdp_format_to_str))
161 seq_puts(s, "<UNKNOWN>");
162
163 seq_printf(s, "\tWaitNextVsync:%d", val & WAIT_NEXT_VSYNC ? 1 : 0);
164 }
165
gdp_dbg_vpo(struct seq_file * s,int val)166 static void gdp_dbg_vpo(struct seq_file *s, int val)
167 {
168 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF);
169 }
170
gdp_dbg_vps(struct seq_file * s,int val)171 static void gdp_dbg_vps(struct seq_file *s, int val)
172 {
173 seq_printf(s, "\txds:%4d\tyds:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF);
174 }
175
gdp_dbg_size(struct seq_file * s,int val)176 static void gdp_dbg_size(struct seq_file *s, int val)
177 {
178 seq_printf(s, "\t%d x %d", val & 0xFFFF, (val >> 16) & 0xFFFF);
179 }
180
gdp_dbg_nvn(struct seq_file * s,struct sti_gdp * gdp,int val)181 static void gdp_dbg_nvn(struct seq_file *s, struct sti_gdp *gdp, int val)
182 {
183 void *base = NULL;
184 unsigned int i;
185
186 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
187 if (gdp->node_list[i].top_field_paddr == val) {
188 base = gdp->node_list[i].top_field;
189 break;
190 }
191 if (gdp->node_list[i].btm_field_paddr == val) {
192 base = gdp->node_list[i].btm_field;
193 break;
194 }
195 }
196
197 if (base)
198 seq_printf(s, "\tVirt @: %p", base);
199 }
200
gdp_dbg_ppt(struct seq_file * s,int val)201 static void gdp_dbg_ppt(struct seq_file *s, int val)
202 {
203 if (val & GAM_GDP_PPT_IGNORE)
204 seq_puts(s, "\tNot displayed on mixer!");
205 }
206
gdp_dbg_mst(struct seq_file * s,int val)207 static void gdp_dbg_mst(struct seq_file *s, int val)
208 {
209 if (val & 1)
210 seq_puts(s, "\tBUFFER UNDERFLOW!");
211 }
212
gdp_dbg_show(struct seq_file * s,void * data)213 static int gdp_dbg_show(struct seq_file *s, void *data)
214 {
215 struct drm_info_node *node = s->private;
216 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data;
217 struct drm_plane *drm_plane = &gdp->plane.drm_plane;
218 struct drm_crtc *crtc;
219
220 drm_modeset_lock(&drm_plane->mutex, NULL);
221 crtc = drm_plane->state->crtc;
222 drm_modeset_unlock(&drm_plane->mutex);
223
224 seq_printf(s, "%s: (vaddr = 0x%p)",
225 sti_plane_to_str(&gdp->plane), gdp->regs);
226
227 DBGFS_DUMP(GAM_GDP_CTL);
228 gdp_dbg_ctl(s, readl(gdp->regs + GAM_GDP_CTL_OFFSET));
229 DBGFS_DUMP(GAM_GDP_AGC);
230 DBGFS_DUMP(GAM_GDP_VPO);
231 gdp_dbg_vpo(s, readl(gdp->regs + GAM_GDP_VPO_OFFSET));
232 DBGFS_DUMP(GAM_GDP_VPS);
233 gdp_dbg_vps(s, readl(gdp->regs + GAM_GDP_VPS_OFFSET));
234 DBGFS_DUMP(GAM_GDP_PML);
235 DBGFS_DUMP(GAM_GDP_PMP);
236 DBGFS_DUMP(GAM_GDP_SIZE);
237 gdp_dbg_size(s, readl(gdp->regs + GAM_GDP_SIZE_OFFSET));
238 DBGFS_DUMP(GAM_GDP_NVN);
239 gdp_dbg_nvn(s, gdp, readl(gdp->regs + GAM_GDP_NVN_OFFSET));
240 DBGFS_DUMP(GAM_GDP_KEY1);
241 DBGFS_DUMP(GAM_GDP_KEY2);
242 DBGFS_DUMP(GAM_GDP_PPT);
243 gdp_dbg_ppt(s, readl(gdp->regs + GAM_GDP_PPT_OFFSET));
244 DBGFS_DUMP(GAM_GDP_CML);
245 DBGFS_DUMP(GAM_GDP_MST);
246 gdp_dbg_mst(s, readl(gdp->regs + GAM_GDP_MST_OFFSET));
247
248 seq_puts(s, "\n\n");
249 if (!crtc)
250 seq_puts(s, " Not connected to any DRM CRTC\n");
251 else
252 seq_printf(s, " Connected to DRM CRTC #%d (%s)\n",
253 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)));
254
255 return 0;
256 }
257
gdp_node_dump_node(struct seq_file * s,struct sti_gdp_node * node)258 static void gdp_node_dump_node(struct seq_file *s, struct sti_gdp_node *node)
259 {
260 seq_printf(s, "\t@:0x%p", node);
261 seq_printf(s, "\n\tCTL 0x%08X", node->gam_gdp_ctl);
262 gdp_dbg_ctl(s, node->gam_gdp_ctl);
263 seq_printf(s, "\n\tAGC 0x%08X", node->gam_gdp_agc);
264 seq_printf(s, "\n\tVPO 0x%08X", node->gam_gdp_vpo);
265 gdp_dbg_vpo(s, node->gam_gdp_vpo);
266 seq_printf(s, "\n\tVPS 0x%08X", node->gam_gdp_vps);
267 gdp_dbg_vps(s, node->gam_gdp_vps);
268 seq_printf(s, "\n\tPML 0x%08X", node->gam_gdp_pml);
269 seq_printf(s, "\n\tPMP 0x%08X", node->gam_gdp_pmp);
270 seq_printf(s, "\n\tSIZE 0x%08X", node->gam_gdp_size);
271 gdp_dbg_size(s, node->gam_gdp_size);
272 seq_printf(s, "\n\tNVN 0x%08X", node->gam_gdp_nvn);
273 seq_printf(s, "\n\tKEY1 0x%08X", node->gam_gdp_key1);
274 seq_printf(s, "\n\tKEY2 0x%08X", node->gam_gdp_key2);
275 seq_printf(s, "\n\tPPT 0x%08X", node->gam_gdp_ppt);
276 gdp_dbg_ppt(s, node->gam_gdp_ppt);
277 seq_printf(s, "\n\tCML 0x%08X\n", node->gam_gdp_cml);
278 }
279
gdp_node_dbg_show(struct seq_file * s,void * arg)280 static int gdp_node_dbg_show(struct seq_file *s, void *arg)
281 {
282 struct drm_info_node *node = s->private;
283 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data;
284 unsigned int b;
285
286 for (b = 0; b < GDP_NODE_NB_BANK; b++) {
287 seq_printf(s, "\n%s[%d].top", sti_plane_to_str(&gdp->plane), b);
288 gdp_node_dump_node(s, gdp->node_list[b].top_field);
289 seq_printf(s, "\n%s[%d].btm", sti_plane_to_str(&gdp->plane), b);
290 gdp_node_dump_node(s, gdp->node_list[b].btm_field);
291 }
292
293 return 0;
294 }
295
296 static struct drm_info_list gdp0_debugfs_files[] = {
297 { "gdp0", gdp_dbg_show, 0, NULL },
298 { "gdp0_node", gdp_node_dbg_show, 0, NULL },
299 };
300
301 static struct drm_info_list gdp1_debugfs_files[] = {
302 { "gdp1", gdp_dbg_show, 0, NULL },
303 { "gdp1_node", gdp_node_dbg_show, 0, NULL },
304 };
305
306 static struct drm_info_list gdp2_debugfs_files[] = {
307 { "gdp2", gdp_dbg_show, 0, NULL },
308 { "gdp2_node", gdp_node_dbg_show, 0, NULL },
309 };
310
311 static struct drm_info_list gdp3_debugfs_files[] = {
312 { "gdp3", gdp_dbg_show, 0, NULL },
313 { "gdp3_node", gdp_node_dbg_show, 0, NULL },
314 };
315
gdp_debugfs_init(struct sti_gdp * gdp,struct drm_minor * minor)316 static int gdp_debugfs_init(struct sti_gdp *gdp, struct drm_minor *minor)
317 {
318 unsigned int i;
319 struct drm_info_list *gdp_debugfs_files;
320 int nb_files;
321
322 switch (gdp->plane.desc) {
323 case STI_GDP_0:
324 gdp_debugfs_files = gdp0_debugfs_files;
325 nb_files = ARRAY_SIZE(gdp0_debugfs_files);
326 break;
327 case STI_GDP_1:
328 gdp_debugfs_files = gdp1_debugfs_files;
329 nb_files = ARRAY_SIZE(gdp1_debugfs_files);
330 break;
331 case STI_GDP_2:
332 gdp_debugfs_files = gdp2_debugfs_files;
333 nb_files = ARRAY_SIZE(gdp2_debugfs_files);
334 break;
335 case STI_GDP_3:
336 gdp_debugfs_files = gdp3_debugfs_files;
337 nb_files = ARRAY_SIZE(gdp3_debugfs_files);
338 break;
339 default:
340 return -EINVAL;
341 }
342
343 for (i = 0; i < nb_files; i++)
344 gdp_debugfs_files[i].data = gdp;
345
346 drm_debugfs_create_files(gdp_debugfs_files,
347 nb_files,
348 minor->debugfs_root, minor);
349 return 0;
350 }
351
sti_gdp_fourcc2format(int fourcc)352 static int sti_gdp_fourcc2format(int fourcc)
353 {
354 switch (fourcc) {
355 case DRM_FORMAT_XRGB8888:
356 return GDP_RGB888_32;
357 case DRM_FORMAT_XBGR8888:
358 return GDP_XBGR8888;
359 case DRM_FORMAT_ARGB8888:
360 return GDP_ARGB8888;
361 case DRM_FORMAT_ABGR8888:
362 return GDP_ABGR8888;
363 case DRM_FORMAT_ARGB4444:
364 return GDP_ARGB4444;
365 case DRM_FORMAT_ARGB1555:
366 return GDP_ARGB1555;
367 case DRM_FORMAT_RGB565:
368 return GDP_RGB565;
369 case DRM_FORMAT_RGB888:
370 return GDP_RGB888;
371 }
372 return -1;
373 }
374
sti_gdp_get_alpharange(int format)375 static int sti_gdp_get_alpharange(int format)
376 {
377 switch (format) {
378 case GDP_ARGB8565:
379 case GDP_ARGB8888:
380 case GDP_ABGR8888:
381 return GAM_GDP_ALPHARANGE_255;
382 }
383 return 0;
384 }
385
386 /**
387 * sti_gdp_get_free_nodes
388 * @gdp: gdp pointer
389 *
390 * Look for a GDP node list that is not currently read by the HW.
391 *
392 * RETURNS:
393 * Pointer to the free GDP node list
394 */
sti_gdp_get_free_nodes(struct sti_gdp * gdp)395 static struct sti_gdp_node_list *sti_gdp_get_free_nodes(struct sti_gdp *gdp)
396 {
397 int hw_nvn;
398 unsigned int i;
399
400 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
401 if (!hw_nvn)
402 goto end;
403
404 for (i = 0; i < GDP_NODE_NB_BANK; i++)
405 if ((hw_nvn != gdp->node_list[i].btm_field_paddr) &&
406 (hw_nvn != gdp->node_list[i].top_field_paddr))
407 return &gdp->node_list[i];
408
409 /* in hazardous cases restart with the first node */
410 DRM_ERROR("inconsistent NVN for %s: 0x%08X\n",
411 sti_plane_to_str(&gdp->plane), hw_nvn);
412
413 end:
414 return &gdp->node_list[0];
415 }
416
417 /**
418 * sti_gdp_get_current_nodes
419 * @gdp: gdp pointer
420 *
421 * Look for GDP nodes that are currently read by the HW.
422 *
423 * RETURNS:
424 * Pointer to the current GDP node list
425 */
426 static
sti_gdp_get_current_nodes(struct sti_gdp * gdp)427 struct sti_gdp_node_list *sti_gdp_get_current_nodes(struct sti_gdp *gdp)
428 {
429 int hw_nvn;
430 unsigned int i;
431
432 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
433 if (!hw_nvn)
434 goto end;
435
436 for (i = 0; i < GDP_NODE_NB_BANK; i++)
437 if ((hw_nvn == gdp->node_list[i].btm_field_paddr) ||
438 (hw_nvn == gdp->node_list[i].top_field_paddr))
439 return &gdp->node_list[i];
440
441 end:
442 DRM_DEBUG_DRIVER("Warning, NVN 0x%08X for %s does not match any node\n",
443 hw_nvn, sti_plane_to_str(&gdp->plane));
444
445 return NULL;
446 }
447
448 /**
449 * sti_gdp_disable
450 * @gdp: gdp pointer
451 *
452 * Disable a GDP.
453 */
sti_gdp_disable(struct sti_gdp * gdp)454 static void sti_gdp_disable(struct sti_gdp *gdp)
455 {
456 unsigned int i;
457
458 DRM_DEBUG_DRIVER("%s\n", sti_plane_to_str(&gdp->plane));
459
460 /* Set the nodes as 'to be ignored on mixer' */
461 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
462 gdp->node_list[i].top_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
463 gdp->node_list[i].btm_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
464 }
465
466 if (sti_vtg_unregister_client(gdp->vtg, &gdp->vtg_field_nb))
467 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
468
469 if (gdp->clk_pix)
470 clk_disable_unprepare(gdp->clk_pix);
471
472 gdp->plane.status = STI_PLANE_DISABLED;
473 gdp->vtg = NULL;
474 }
475
476 /**
477 * sti_gdp_field_cb
478 * @nb: notifier block
479 * @event: event message
480 * @data: private data
481 *
482 * Handle VTG top field and bottom field event.
483 *
484 * RETURNS:
485 * 0 on success.
486 */
sti_gdp_field_cb(struct notifier_block * nb,unsigned long event,void * data)487 static int sti_gdp_field_cb(struct notifier_block *nb,
488 unsigned long event, void *data)
489 {
490 struct sti_gdp *gdp = container_of(nb, struct sti_gdp, vtg_field_nb);
491
492 if (gdp->plane.status == STI_PLANE_FLUSHING) {
493 /* disable need to be synchronize on vsync event */
494 DRM_DEBUG_DRIVER("Vsync event received => disable %s\n",
495 sti_plane_to_str(&gdp->plane));
496
497 sti_gdp_disable(gdp);
498 }
499
500 switch (event) {
501 case VTG_TOP_FIELD_EVENT:
502 gdp->is_curr_top = true;
503 break;
504 case VTG_BOTTOM_FIELD_EVENT:
505 gdp->is_curr_top = false;
506 break;
507 default:
508 DRM_ERROR("unsupported event: %lu\n", event);
509 break;
510 }
511
512 return 0;
513 }
514
sti_gdp_init(struct sti_gdp * gdp)515 static void sti_gdp_init(struct sti_gdp *gdp)
516 {
517 struct device_node *np = gdp->dev->of_node;
518 dma_addr_t dma_addr;
519 void *base;
520 unsigned int i, size;
521
522 /* Allocate all the nodes within a single memory page */
523 size = sizeof(struct sti_gdp_node) *
524 GDP_NODE_PER_FIELD * GDP_NODE_NB_BANK;
525 base = dma_alloc_wc(gdp->dev, size, &dma_addr, GFP_KERNEL);
526
527 if (!base) {
528 DRM_ERROR("Failed to allocate memory for GDP node\n");
529 return;
530 }
531 memset(base, 0, size);
532
533 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
534 if (dma_addr & 0xF) {
535 DRM_ERROR("Mem alignment failed\n");
536 return;
537 }
538 gdp->node_list[i].top_field = base;
539 gdp->node_list[i].top_field_paddr = dma_addr;
540
541 DRM_DEBUG_DRIVER("node[%d].top_field=%p\n", i, base);
542 base += sizeof(struct sti_gdp_node);
543 dma_addr += sizeof(struct sti_gdp_node);
544
545 if (dma_addr & 0xF) {
546 DRM_ERROR("Mem alignment failed\n");
547 return;
548 }
549 gdp->node_list[i].btm_field = base;
550 gdp->node_list[i].btm_field_paddr = dma_addr;
551 DRM_DEBUG_DRIVER("node[%d].btm_field=%p\n", i, base);
552 base += sizeof(struct sti_gdp_node);
553 dma_addr += sizeof(struct sti_gdp_node);
554 }
555
556 if (of_device_is_compatible(np, "st,stih407-compositor")) {
557 /* GDP of STiH407 chip have its own pixel clock */
558 char *clk_name;
559
560 switch (gdp->plane.desc) {
561 case STI_GDP_0:
562 clk_name = "pix_gdp1";
563 break;
564 case STI_GDP_1:
565 clk_name = "pix_gdp2";
566 break;
567 case STI_GDP_2:
568 clk_name = "pix_gdp3";
569 break;
570 case STI_GDP_3:
571 clk_name = "pix_gdp4";
572 break;
573 default:
574 DRM_ERROR("GDP id not recognized\n");
575 return;
576 }
577
578 gdp->clk_pix = devm_clk_get(gdp->dev, clk_name);
579 if (IS_ERR(gdp->clk_pix))
580 DRM_ERROR("Cannot get %s clock\n", clk_name);
581
582 gdp->clk_main_parent = devm_clk_get(gdp->dev, "main_parent");
583 if (IS_ERR(gdp->clk_main_parent))
584 DRM_ERROR("Cannot get main_parent clock\n");
585
586 gdp->clk_aux_parent = devm_clk_get(gdp->dev, "aux_parent");
587 if (IS_ERR(gdp->clk_aux_parent))
588 DRM_ERROR("Cannot get aux_parent clock\n");
589 }
590 }
591
592 /**
593 * sti_gdp_get_dst
594 * @dev: device
595 * @dst: requested destination size
596 * @src: source size
597 *
598 * Return the cropped / clamped destination size
599 *
600 * RETURNS:
601 * cropped / clamped destination size
602 */
sti_gdp_get_dst(struct device * dev,int dst,int src)603 static int sti_gdp_get_dst(struct device *dev, int dst, int src)
604 {
605 if (dst == src)
606 return dst;
607
608 if (dst < src) {
609 dev_dbg(dev, "WARNING: GDP scale not supported, will crop\n");
610 return dst;
611 }
612
613 dev_dbg(dev, "WARNING: GDP scale not supported, will clamp\n");
614 return src;
615 }
616
sti_gdp_atomic_check(struct drm_plane * drm_plane,struct drm_atomic_state * state)617 static int sti_gdp_atomic_check(struct drm_plane *drm_plane,
618 struct drm_atomic_state *state)
619 {
620 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
621 drm_plane);
622 struct sti_plane *plane = to_sti_plane(drm_plane);
623 struct sti_gdp *gdp = to_sti_gdp(plane);
624 struct drm_crtc *crtc = new_plane_state->crtc;
625 struct drm_framebuffer *fb = new_plane_state->fb;
626 struct drm_crtc_state *crtc_state;
627 struct sti_mixer *mixer;
628 struct drm_display_mode *mode;
629 int dst_x, dst_y, dst_w, dst_h;
630 int src_x, src_y, src_w, src_h;
631 int format;
632
633 /* no need for further checks if the plane is being disabled */
634 if (!crtc || !fb)
635 return 0;
636
637 mixer = to_sti_mixer(crtc);
638 crtc_state = drm_atomic_get_crtc_state(state, crtc);
639 mode = &crtc_state->mode;
640 dst_x = new_plane_state->crtc_x;
641 dst_y = new_plane_state->crtc_y;
642 dst_w = clamp_val(new_plane_state->crtc_w, 0, mode->hdisplay - dst_x);
643 dst_h = clamp_val(new_plane_state->crtc_h, 0, mode->vdisplay - dst_y);
644 /* src_x are in 16.16 format */
645 src_x = new_plane_state->src_x >> 16;
646 src_y = new_plane_state->src_y >> 16;
647 src_w = clamp_val(new_plane_state->src_w >> 16, 0,
648 GAM_GDP_SIZE_MAX_WIDTH);
649 src_h = clamp_val(new_plane_state->src_h >> 16, 0,
650 GAM_GDP_SIZE_MAX_HEIGHT);
651
652 format = sti_gdp_fourcc2format(fb->format->format);
653 if (format == -1) {
654 DRM_ERROR("Format not supported by GDP %.4s\n",
655 (char *)&fb->format->format);
656 return -EINVAL;
657 }
658
659 if (!drm_fb_cma_get_gem_obj(fb, 0)) {
660 DRM_ERROR("Can't get CMA GEM object for fb\n");
661 return -EINVAL;
662 }
663
664 /* Set gdp clock */
665 if (mode->clock && gdp->clk_pix) {
666 struct clk *clkp;
667 int rate = mode->clock * 1000;
668 int res;
669
670 /*
671 * According to the mixer used, the gdp pixel clock
672 * should have a different parent clock.
673 */
674 if (mixer->id == STI_MIXER_MAIN)
675 clkp = gdp->clk_main_parent;
676 else
677 clkp = gdp->clk_aux_parent;
678
679 if (clkp)
680 clk_set_parent(gdp->clk_pix, clkp);
681
682 res = clk_set_rate(gdp->clk_pix, rate);
683 if (res < 0) {
684 DRM_ERROR("Cannot set rate (%dHz) for gdp\n",
685 rate);
686 return -EINVAL;
687 }
688 }
689
690 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
691 crtc->base.id, sti_mixer_to_str(mixer),
692 drm_plane->base.id, sti_plane_to_str(plane));
693 DRM_DEBUG_KMS("%s dst=(%dx%d)@(%d,%d) - src=(%dx%d)@(%d,%d)\n",
694 sti_plane_to_str(plane),
695 dst_w, dst_h, dst_x, dst_y,
696 src_w, src_h, src_x, src_y);
697
698 return 0;
699 }
700
sti_gdp_atomic_update(struct drm_plane * drm_plane,struct drm_atomic_state * state)701 static void sti_gdp_atomic_update(struct drm_plane *drm_plane,
702 struct drm_atomic_state *state)
703 {
704 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state,
705 drm_plane);
706 struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state,
707 drm_plane);
708 struct sti_plane *plane = to_sti_plane(drm_plane);
709 struct sti_gdp *gdp = to_sti_gdp(plane);
710 struct drm_crtc *crtc = newstate->crtc;
711 struct drm_framebuffer *fb = newstate->fb;
712 struct drm_display_mode *mode;
713 int dst_x, dst_y, dst_w, dst_h;
714 int src_x, src_y, src_w, src_h;
715 struct drm_gem_cma_object *cma_obj;
716 struct sti_gdp_node_list *list;
717 struct sti_gdp_node_list *curr_list;
718 struct sti_gdp_node *top_field, *btm_field;
719 u32 dma_updated_top;
720 u32 dma_updated_btm;
721 int format;
722 unsigned int bpp;
723 u32 ydo, xdo, yds, xds;
724
725 if (!crtc || !fb)
726 return;
727
728 if ((oldstate->fb == newstate->fb) &&
729 (oldstate->crtc_x == newstate->crtc_x) &&
730 (oldstate->crtc_y == newstate->crtc_y) &&
731 (oldstate->crtc_w == newstate->crtc_w) &&
732 (oldstate->crtc_h == newstate->crtc_h) &&
733 (oldstate->src_x == newstate->src_x) &&
734 (oldstate->src_y == newstate->src_y) &&
735 (oldstate->src_w == newstate->src_w) &&
736 (oldstate->src_h == newstate->src_h)) {
737 /* No change since last update, do not post cmd */
738 DRM_DEBUG_DRIVER("No change, not posting cmd\n");
739 plane->status = STI_PLANE_UPDATED;
740 return;
741 }
742
743 if (!gdp->vtg) {
744 struct sti_compositor *compo = dev_get_drvdata(gdp->dev);
745 struct sti_mixer *mixer = to_sti_mixer(crtc);
746
747 /* Register gdp callback */
748 gdp->vtg = compo->vtg[mixer->id];
749 sti_vtg_register_client(gdp->vtg, &gdp->vtg_field_nb, crtc);
750 clk_prepare_enable(gdp->clk_pix);
751 }
752
753 mode = &crtc->mode;
754 dst_x = newstate->crtc_x;
755 dst_y = newstate->crtc_y;
756 dst_w = clamp_val(newstate->crtc_w, 0, mode->hdisplay - dst_x);
757 dst_h = clamp_val(newstate->crtc_h, 0, mode->vdisplay - dst_y);
758 /* src_x are in 16.16 format */
759 src_x = newstate->src_x >> 16;
760 src_y = newstate->src_y >> 16;
761 src_w = clamp_val(newstate->src_w >> 16, 0, GAM_GDP_SIZE_MAX_WIDTH);
762 src_h = clamp_val(newstate->src_h >> 16, 0, GAM_GDP_SIZE_MAX_HEIGHT);
763
764 list = sti_gdp_get_free_nodes(gdp);
765 top_field = list->top_field;
766 btm_field = list->btm_field;
767
768 dev_dbg(gdp->dev, "%s %s top_node:0x%p btm_node:0x%p\n", __func__,
769 sti_plane_to_str(plane), top_field, btm_field);
770
771 /* build the top field */
772 top_field->gam_gdp_agc = GAM_GDP_AGC_FULL_RANGE;
773 top_field->gam_gdp_ctl = WAIT_NEXT_VSYNC;
774 format = sti_gdp_fourcc2format(fb->format->format);
775 top_field->gam_gdp_ctl |= format;
776 top_field->gam_gdp_ctl |= sti_gdp_get_alpharange(format);
777 top_field->gam_gdp_ppt &= ~GAM_GDP_PPT_IGNORE;
778
779 cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
780
781 DRM_DEBUG_DRIVER("drm FB:%d format:%.4s phys@:0x%lx\n", fb->base.id,
782 (char *)&fb->format->format,
783 (unsigned long)cma_obj->paddr);
784
785 /* pixel memory location */
786 bpp = fb->format->cpp[0];
787 top_field->gam_gdp_pml = (u32)cma_obj->paddr + fb->offsets[0];
788 top_field->gam_gdp_pml += src_x * bpp;
789 top_field->gam_gdp_pml += src_y * fb->pitches[0];
790
791 /* output parameters (clamped / cropped) */
792 dst_w = sti_gdp_get_dst(gdp->dev, dst_w, src_w);
793 dst_h = sti_gdp_get_dst(gdp->dev, dst_h, src_h);
794 ydo = sti_vtg_get_line_number(*mode, dst_y);
795 yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1);
796 xdo = sti_vtg_get_pixel_number(*mode, dst_x);
797 xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1);
798 top_field->gam_gdp_vpo = (ydo << 16) | xdo;
799 top_field->gam_gdp_vps = (yds << 16) | xds;
800
801 /* input parameters */
802 src_w = dst_w;
803 top_field->gam_gdp_pmp = fb->pitches[0];
804 top_field->gam_gdp_size = src_h << 16 | src_w;
805
806 /* Same content and chained together */
807 memcpy(btm_field, top_field, sizeof(*btm_field));
808 top_field->gam_gdp_nvn = list->btm_field_paddr;
809 btm_field->gam_gdp_nvn = list->top_field_paddr;
810
811 /* Interlaced mode */
812 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
813 btm_field->gam_gdp_pml = top_field->gam_gdp_pml +
814 fb->pitches[0];
815
816 /* Update the NVN field of the 'right' field of the current GDP node
817 * (being used by the HW) with the address of the updated ('free') top
818 * field GDP node.
819 * - In interlaced mode the 'right' field is the bottom field as we
820 * update frames starting from their top field
821 * - In progressive mode, we update both bottom and top fields which
822 * are equal nodes.
823 * At the next VSYNC, the updated node list will be used by the HW.
824 */
825 curr_list = sti_gdp_get_current_nodes(gdp);
826 dma_updated_top = list->top_field_paddr;
827 dma_updated_btm = list->btm_field_paddr;
828
829 dev_dbg(gdp->dev, "Current NVN:0x%X\n",
830 readl(gdp->regs + GAM_GDP_NVN_OFFSET));
831 dev_dbg(gdp->dev, "Posted buff: %lx current buff: %x\n",
832 (unsigned long)cma_obj->paddr,
833 readl(gdp->regs + GAM_GDP_PML_OFFSET));
834
835 if (!curr_list) {
836 /* First update or invalid node should directly write in the
837 * hw register */
838 DRM_DEBUG_DRIVER("%s first update (or invalid node)\n",
839 sti_plane_to_str(plane));
840
841 writel(gdp->is_curr_top ?
842 dma_updated_btm : dma_updated_top,
843 gdp->regs + GAM_GDP_NVN_OFFSET);
844 goto end;
845 }
846
847 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
848 if (gdp->is_curr_top) {
849 /* Do not update in the middle of the frame, but
850 * postpone the update after the bottom field has
851 * been displayed */
852 curr_list->btm_field->gam_gdp_nvn = dma_updated_top;
853 } else {
854 /* Direct update to avoid one frame delay */
855 writel(dma_updated_top,
856 gdp->regs + GAM_GDP_NVN_OFFSET);
857 }
858 } else {
859 /* Direct update for progressive to avoid one frame delay */
860 writel(dma_updated_top, gdp->regs + GAM_GDP_NVN_OFFSET);
861 }
862
863 end:
864 sti_plane_update_fps(plane, true, false);
865
866 plane->status = STI_PLANE_UPDATED;
867 }
868
sti_gdp_atomic_disable(struct drm_plane * drm_plane,struct drm_atomic_state * state)869 static void sti_gdp_atomic_disable(struct drm_plane *drm_plane,
870 struct drm_atomic_state *state)
871 {
872 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state,
873 drm_plane);
874 struct sti_plane *plane = to_sti_plane(drm_plane);
875
876 if (!oldstate->crtc) {
877 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
878 drm_plane->base.id);
879 return;
880 }
881
882 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
883 oldstate->crtc->base.id,
884 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)),
885 drm_plane->base.id, sti_plane_to_str(plane));
886
887 plane->status = STI_PLANE_DISABLING;
888 }
889
890 static const struct drm_plane_helper_funcs sti_gdp_helpers_funcs = {
891 .atomic_check = sti_gdp_atomic_check,
892 .atomic_update = sti_gdp_atomic_update,
893 .atomic_disable = sti_gdp_atomic_disable,
894 };
895
sti_gdp_late_register(struct drm_plane * drm_plane)896 static int sti_gdp_late_register(struct drm_plane *drm_plane)
897 {
898 struct sti_plane *plane = to_sti_plane(drm_plane);
899 struct sti_gdp *gdp = to_sti_gdp(plane);
900
901 return gdp_debugfs_init(gdp, drm_plane->dev->primary);
902 }
903
904 static const struct drm_plane_funcs sti_gdp_plane_helpers_funcs = {
905 .update_plane = drm_atomic_helper_update_plane,
906 .disable_plane = drm_atomic_helper_disable_plane,
907 .destroy = drm_plane_cleanup,
908 .reset = drm_atomic_helper_plane_reset,
909 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
910 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
911 .late_register = sti_gdp_late_register,
912 };
913
sti_gdp_create(struct drm_device * drm_dev,struct device * dev,int desc,void __iomem * baseaddr,unsigned int possible_crtcs,enum drm_plane_type type)914 struct drm_plane *sti_gdp_create(struct drm_device *drm_dev,
915 struct device *dev, int desc,
916 void __iomem *baseaddr,
917 unsigned int possible_crtcs,
918 enum drm_plane_type type)
919 {
920 struct sti_gdp *gdp;
921 int res;
922
923 gdp = devm_kzalloc(dev, sizeof(*gdp), GFP_KERNEL);
924 if (!gdp) {
925 DRM_ERROR("Failed to allocate memory for GDP\n");
926 return NULL;
927 }
928
929 gdp->dev = dev;
930 gdp->regs = baseaddr;
931 gdp->plane.desc = desc;
932 gdp->plane.status = STI_PLANE_DISABLED;
933
934 gdp->vtg_field_nb.notifier_call = sti_gdp_field_cb;
935
936 sti_gdp_init(gdp);
937
938 res = drm_universal_plane_init(drm_dev, &gdp->plane.drm_plane,
939 possible_crtcs,
940 &sti_gdp_plane_helpers_funcs,
941 gdp_supported_formats,
942 ARRAY_SIZE(gdp_supported_formats),
943 NULL, type, NULL);
944 if (res) {
945 DRM_ERROR("Failed to initialize universal plane\n");
946 goto err;
947 }
948
949 drm_plane_helper_add(&gdp->plane.drm_plane, &sti_gdp_helpers_funcs);
950
951 sti_plane_init_property(&gdp->plane, type);
952
953 return &gdp->plane.drm_plane;
954
955 err:
956 devm_kfree(dev, gdp);
957 return NULL;
958 }
959