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Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[deliverable/linux.git] / drivers / gpu / drm / sti / sti_gdp.c
CommitLineData
ba2d53fb
BG		 1/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
4 * Fabien Dessenne <fabien.dessenne@st.com>
5 * for STMicroelectronics.
6 * License terms: GNU General Public License (GPL), version 2
7 */
0f3e1561 8#include <linux/seq_file.h>
ba2d53fb 9
dd86dc2f 10#include <drm/drm_atomic.h>
29d1dc62
VA		 11#include <drm/drm_fb_cma_helper.h>
12#include <drm/drm_gem_cma_helper.h>
13
d219673d 14#include "sti_compositor.h"
ba2d53fb 15#include "sti_gdp.h"
9e1f05b2 16#include "sti_plane.h"
ba2d53fb
BG		 17#include "sti_vtg.h"
18
4af6b12a 19#define ALPHASWITCH BIT(6)
ba2d53fb 20#define ENA_COLOR_FILL BIT(8)
4af6b12a 21#define BIGNOTLITTLE BIT(23)
ba2d53fb
BG		 22#define WAIT_NEXT_VSYNC BIT(31)
23
24/* GDP color formats */
25#define GDP_RGB565 0x00
26#define GDP_RGB888 0x01
27#define GDP_RGB888_32 0x02
8adb5776 28#define GDP_XBGR8888 (GDP_RGB888_32 | BIGNOTLITTLE | ALPHASWITCH)
ba2d53fb
BG		 29#define GDP_ARGB8565 0x04
30#define GDP_ARGB8888 0x05
29d1dc62 31#define GDP_ABGR8888 (GDP_ARGB8888 | BIGNOTLITTLE | ALPHASWITCH)
ba2d53fb
BG		 32#define GDP_ARGB1555 0x06
33#define GDP_ARGB4444 0x07
ba2d53fb 34
2d61f272
VA		 35#define GDP2STR(fmt) { GDP_ ## fmt, #fmt }
36
37static struct gdp_format_to_str {
38 int format;
39 char name[20];
40} gdp_format_to_str[] = {
41 GDP2STR(RGB565),
42 GDP2STR(RGB888),
43 GDP2STR(RGB888_32),
44 GDP2STR(XBGR8888),
45 GDP2STR(ARGB8565),
46 GDP2STR(ARGB8888),
47 GDP2STR(ABGR8888),
48 GDP2STR(ARGB1555),
49 GDP2STR(ARGB4444)
50 };
ba2d53fb
BG		 51
52#define GAM_GDP_CTL_OFFSET 0x00
53#define GAM_GDP_AGC_OFFSET 0x04
54#define GAM_GDP_VPO_OFFSET 0x0C
55#define GAM_GDP_VPS_OFFSET 0x10
56#define GAM_GDP_PML_OFFSET 0x14
57#define GAM_GDP_PMP_OFFSET 0x18
58#define GAM_GDP_SIZE_OFFSET 0x1C
59#define GAM_GDP_NVN_OFFSET 0x24
60#define GAM_GDP_KEY1_OFFSET 0x28
61#define GAM_GDP_KEY2_OFFSET 0x2C
62#define GAM_GDP_PPT_OFFSET 0x34
63#define GAM_GDP_CML_OFFSET 0x3C
64#define GAM_GDP_MST_OFFSET 0x68
65
66#define GAM_GDP_ALPHARANGE_255 BIT(5)
67#define GAM_GDP_AGC_FULL_RANGE 0x00808080
68#define GAM_GDP_PPT_IGNORE (BIT(1) | BIT(0))
69#define GAM_GDP_SIZE_MAX 0x7FF
70
29d1dc62
VA		 71#define GDP_NODE_NB_BANK 2
72#define GDP_NODE_PER_FIELD 2
ba2d53fb
BG		 73
74struct sti_gdp_node {
75 u32 gam_gdp_ctl;
76 u32 gam_gdp_agc;
77 u32 reserved1;
78 u32 gam_gdp_vpo;
79 u32 gam_gdp_vps;
80 u32 gam_gdp_pml;
81 u32 gam_gdp_pmp;
82 u32 gam_gdp_size;
83 u32 reserved2;
84 u32 gam_gdp_nvn;
85 u32 gam_gdp_key1;
86 u32 gam_gdp_key2;
87 u32 reserved3;
88 u32 gam_gdp_ppt;
89 u32 reserved4;
90 u32 gam_gdp_cml;
91};
92
93struct sti_gdp_node_list {
94 struct sti_gdp_node *top_field;
a51fe84d 95 dma_addr_t top_field_paddr;
ba2d53fb 96 struct sti_gdp_node *btm_field;
a51fe84d 97 dma_addr_t btm_field_paddr;
ba2d53fb
BG		 98};
99
100/**
101 * STI GDP structure
102 *
871bcdfe
VA		 103 * @sti_plane: sti_plane structure
104 * @dev: driver device
105 * @regs: gdp registers
ba2d53fb 106 * @clk_pix: pixel clock for the current gdp
5e03abc5
BG		 107 * @clk_main_parent: gdp parent clock if main path used
108 * @clk_aux_parent: gdp parent clock if aux path used
ba2d53fb
BG		 109 * @vtg_field_nb: callback for VTG FIELD (top or bottom) notification
110 * @is_curr_top: true if the current node processed is the top field
871bcdfe 111 * @node_list: array of node list
20c47601 112 * @vtg: registered vtg
ba2d53fb
BG		 113 */
114struct sti_gdp {
871bcdfe
VA		 115 struct sti_plane plane;
116 struct device *dev;
117 void __iomem *regs;
ba2d53fb 118 struct clk *clk_pix;
5e03abc5
BG		 119 struct clk *clk_main_parent;
120 struct clk *clk_aux_parent;
ba2d53fb
BG		 121 struct notifier_block vtg_field_nb;
122 bool is_curr_top;
123 struct sti_gdp_node_list node_list[GDP_NODE_NB_BANK];
20c47601 124 struct sti_vtg *vtg;
ba2d53fb
BG		 125};
126
871bcdfe 127#define to_sti_gdp(x) container_of(x, struct sti_gdp, plane)
ba2d53fb
BG		 128
129static const uint32_t gdp_supported_formats[] = {
130 DRM_FORMAT_XRGB8888,
8adb5776 131 DRM_FORMAT_XBGR8888,
ba2d53fb 132 DRM_FORMAT_ARGB8888,
4af6b12a 133 DRM_FORMAT_ABGR8888,
ba2d53fb
BG		 134 DRM_FORMAT_ARGB4444,
135 DRM_FORMAT_ARGB1555,
136 DRM_FORMAT_RGB565,
137 DRM_FORMAT_RGB888,
ba2d53fb
BG		 138};
139
2d61f272
VA		 140#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
141 readl(gdp->regs + reg ## _OFFSET))
142
143static void gdp_dbg_ctl(struct seq_file *s, int val)
144{
145 int i;
146
147 seq_puts(s, "\tColor:");
148 for (i = 0; i < ARRAY_SIZE(gdp_format_to_str); i++) {
149 if (gdp_format_to_str[i].format == (val & 0x1F)) {
150 seq_printf(s, gdp_format_to_str[i].name);
151 break;
152 }
153 }
154 if (i == ARRAY_SIZE(gdp_format_to_str))
155 seq_puts(s, "<UNKNOWN>");
156
157 seq_printf(s, "\tWaitNextVsync:%d", val & WAIT_NEXT_VSYNC ? 1 : 0);
158}
159
160static void gdp_dbg_vpo(struct seq_file *s, int val)
161{
162 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF);
163}
164
165static void gdp_dbg_vps(struct seq_file *s, int val)
166{
167 seq_printf(s, "\txds:%4d\tyds:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF);
168}
169
170static void gdp_dbg_size(struct seq_file *s, int val)
171{
172 seq_printf(s, "\t%d x %d", val & 0xFFFF, (val >> 16) & 0xFFFF);
173}
174
175static void gdp_dbg_nvn(struct seq_file *s, struct sti_gdp *gdp, int val)
176{
177 void *base = NULL;
178 unsigned int i;
179
180 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
181 if (gdp->node_list[i].top_field_paddr == val) {
182 base = gdp->node_list[i].top_field;
183 break;
184 }
185 if (gdp->node_list[i].btm_field_paddr == val) {
186 base = gdp->node_list[i].btm_field;
187 break;
188 }
189 }
190
191 if (base)
192 seq_printf(s, "\tVirt @: %p", base);
193}
194
195static void gdp_dbg_ppt(struct seq_file *s, int val)
196{
197 if (val & GAM_GDP_PPT_IGNORE)
198 seq_puts(s, "\tNot displayed on mixer!");
199}
200
201static void gdp_dbg_mst(struct seq_file *s, int val)
202{
203 if (val & 1)
204 seq_puts(s, "\tBUFFER UNDERFLOW!");
205}
206
207static int gdp_dbg_show(struct seq_file *s, void *data)
208{
209 struct drm_info_node *node = s->private;
210 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data;
2d61f272
VA		 211 struct drm_plane *drm_plane = &gdp->plane.drm_plane;
212 struct drm_crtc *crtc = drm_plane->crtc;
2d61f272
VA		 213
214 seq_printf(s, "%s: (vaddr = 0x%p)",
215 sti_plane_to_str(&gdp->plane), gdp->regs);
216
217 DBGFS_DUMP(GAM_GDP_CTL);
218 gdp_dbg_ctl(s, readl(gdp->regs + GAM_GDP_CTL_OFFSET));
219 DBGFS_DUMP(GAM_GDP_AGC);
220 DBGFS_DUMP(GAM_GDP_VPO);
221 gdp_dbg_vpo(s, readl(gdp->regs + GAM_GDP_VPO_OFFSET));
222 DBGFS_DUMP(GAM_GDP_VPS);
223 gdp_dbg_vps(s, readl(gdp->regs + GAM_GDP_VPS_OFFSET));
224 DBGFS_DUMP(GAM_GDP_PML);
225 DBGFS_DUMP(GAM_GDP_PMP);
226 DBGFS_DUMP(GAM_GDP_SIZE);
227 gdp_dbg_size(s, readl(gdp->regs + GAM_GDP_SIZE_OFFSET));
228 DBGFS_DUMP(GAM_GDP_NVN);
229 gdp_dbg_nvn(s, gdp, readl(gdp->regs + GAM_GDP_NVN_OFFSET));
230 DBGFS_DUMP(GAM_GDP_KEY1);
231 DBGFS_DUMP(GAM_GDP_KEY2);
232 DBGFS_DUMP(GAM_GDP_PPT);
233 gdp_dbg_ppt(s, readl(gdp->regs + GAM_GDP_PPT_OFFSET));
234 DBGFS_DUMP(GAM_GDP_CML);
235 DBGFS_DUMP(GAM_GDP_MST);
236 gdp_dbg_mst(s, readl(gdp->regs + GAM_GDP_MST_OFFSET));
237
238 seq_puts(s, "\n\n");
239 if (!crtc)
240 seq_puts(s, " Not connected to any DRM CRTC\n");
241 else
242 seq_printf(s, " Connected to DRM CRTC #%d (%s)\n",
243 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)));
244
2d61f272
VA		 245 return 0;
246}
247
248static void gdp_node_dump_node(struct seq_file *s, struct sti_gdp_node *node)
249{
250 seq_printf(s, "\t@:0x%p", node);
251 seq_printf(s, "\n\tCTL 0x%08X", node->gam_gdp_ctl);
252 gdp_dbg_ctl(s, node->gam_gdp_ctl);
253 seq_printf(s, "\n\tAGC 0x%08X", node->gam_gdp_agc);
254 seq_printf(s, "\n\tVPO 0x%08X", node->gam_gdp_vpo);
255 gdp_dbg_vpo(s, node->gam_gdp_vpo);
256 seq_printf(s, "\n\tVPS 0x%08X", node->gam_gdp_vps);
257 gdp_dbg_vps(s, node->gam_gdp_vps);
258 seq_printf(s, "\n\tPML 0x%08X", node->gam_gdp_pml);
259 seq_printf(s, "\n\tPMP 0x%08X", node->gam_gdp_pmp);
260 seq_printf(s, "\n\tSIZE 0x%08X", node->gam_gdp_size);
261 gdp_dbg_size(s, node->gam_gdp_size);
262 seq_printf(s, "\n\tNVN 0x%08X", node->gam_gdp_nvn);
263 seq_printf(s, "\n\tKEY1 0x%08X", node->gam_gdp_key1);
264 seq_printf(s, "\n\tKEY2 0x%08X", node->gam_gdp_key2);
265 seq_printf(s, "\n\tPPT 0x%08X", node->gam_gdp_ppt);
266 gdp_dbg_ppt(s, node->gam_gdp_ppt);
267 seq_printf(s, "\n\tCML 0x%08X", node->gam_gdp_cml);
268 seq_puts(s, "\n");
269}
270
271static int gdp_node_dbg_show(struct seq_file *s, void *arg)
272{
273 struct drm_info_node *node = s->private;
274 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data;
2d61f272 275 unsigned int b;
2d61f272
VA		 276
277 for (b = 0; b < GDP_NODE_NB_BANK; b++) {
278 seq_printf(s, "\n%s[%d].top", sti_plane_to_str(&gdp->plane), b);
279 gdp_node_dump_node(s, gdp->node_list[b].top_field);
280 seq_printf(s, "\n%s[%d].btm", sti_plane_to_str(&gdp->plane), b);
281 gdp_node_dump_node(s, gdp->node_list[b].btm_field);
282 }
283
2d61f272
VA		 284 return 0;
285}
286
287static struct drm_info_list gdp0_debugfs_files[] = {
288 { "gdp0", gdp_dbg_show, 0, NULL },
289 { "gdp0_node", gdp_node_dbg_show, 0, NULL },
290};
291
292static struct drm_info_list gdp1_debugfs_files[] = {
293 { "gdp1", gdp_dbg_show, 0, NULL },
294 { "gdp1_node", gdp_node_dbg_show, 0, NULL },
295};
296
297static struct drm_info_list gdp2_debugfs_files[] = {
298 { "gdp2", gdp_dbg_show, 0, NULL },
299 { "gdp2_node", gdp_node_dbg_show, 0, NULL },
300};
301
302static struct drm_info_list gdp3_debugfs_files[] = {
303 { "gdp3", gdp_dbg_show, 0, NULL },
304 { "gdp3_node", gdp_node_dbg_show, 0, NULL },
305};
306
307static int gdp_debugfs_init(struct sti_gdp *gdp, struct drm_minor *minor)
308{
309 unsigned int i;
310 struct drm_info_list *gdp_debugfs_files;
311 int nb_files;
312
313 switch (gdp->plane.desc) {
314 case STI_GDP_0:
315 gdp_debugfs_files = gdp0_debugfs_files;
316 nb_files = ARRAY_SIZE(gdp0_debugfs_files);
317 break;
318 case STI_GDP_1:
319 gdp_debugfs_files = gdp1_debugfs_files;
320 nb_files = ARRAY_SIZE(gdp1_debugfs_files);
321 break;
322 case STI_GDP_2:
323 gdp_debugfs_files = gdp2_debugfs_files;
324 nb_files = ARRAY_SIZE(gdp2_debugfs_files);
325 break;
326 case STI_GDP_3:
327 gdp_debugfs_files = gdp3_debugfs_files;
328 nb_files = ARRAY_SIZE(gdp3_debugfs_files);
329 break;
330 default:
331 return -EINVAL;
332 }
333
334 for (i = 0; i < nb_files; i++)
335 gdp_debugfs_files[i].data = gdp;
336
337 return drm_debugfs_create_files(gdp_debugfs_files,
338 nb_files,
339 minor->debugfs_root, minor);
340}
341
ba2d53fb
BG		 342static int sti_gdp_fourcc2format(int fourcc)
343{
344 switch (fourcc) {
345 case DRM_FORMAT_XRGB8888:
346 return GDP_RGB888_32;
8adb5776
FD		 347 case DRM_FORMAT_XBGR8888:
348 return GDP_XBGR8888;
ba2d53fb
BG		 349 case DRM_FORMAT_ARGB8888:
350 return GDP_ARGB8888;
4af6b12a
BG		 351 case DRM_FORMAT_ABGR8888:
352 return GDP_ABGR8888;
ba2d53fb
BG		 353 case DRM_FORMAT_ARGB4444:
354 return GDP_ARGB4444;
355 case DRM_FORMAT_ARGB1555:
356 return GDP_ARGB1555;
357 case DRM_FORMAT_RGB565:
358 return GDP_RGB565;
359 case DRM_FORMAT_RGB888:
360 return GDP_RGB888;
ba2d53fb
BG		 361 }
362 return -1;
363}
364
365static int sti_gdp_get_alpharange(int format)
366{
367 switch (format) {
368 case GDP_ARGB8565:
369 case GDP_ARGB8888:
4af6b12a 370 case GDP_ABGR8888:
ba2d53fb
BG		 371 return GAM_GDP_ALPHARANGE_255;
372 }
373 return 0;
374}
375
376/**
377 * sti_gdp_get_free_nodes
29d1dc62 378 * @gdp: gdp pointer
ba2d53fb
BG		 379 *
380 * Look for a GDP node list that is not currently read by the HW.
381 *
382 * RETURNS:
383 * Pointer to the free GDP node list
384 */
29d1dc62 385static struct sti_gdp_node_list *sti_gdp_get_free_nodes(struct sti_gdp *gdp)
ba2d53fb
BG		 386{
387 int hw_nvn;
ba2d53fb
BG		 388 unsigned int i;
389
871bcdfe 390 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
ba2d53fb
BG		 391 if (!hw_nvn)
392 goto end;
393
ba2d53fb 394 for (i = 0; i < GDP_NODE_NB_BANK; i++)
a51fe84d
BG		 395 if ((hw_nvn != gdp->node_list[i].btm_field_paddr) &&
396 (hw_nvn != gdp->node_list[i].top_field_paddr))
ba2d53fb
BG		 397 return &gdp->node_list[i];
398
d219673d
BG		 399 /* in hazardious cases restart with the first node */
400 DRM_ERROR("inconsistent NVN for %s: 0x%08X\n",
29d1dc62 401 sti_plane_to_str(&gdp->plane), hw_nvn);
d219673d 402
ba2d53fb
BG		 403end:
404 return &gdp->node_list[0];
405}
406
407/**
408 * sti_gdp_get_current_nodes
29d1dc62 409 * @gdp: gdp pointer
ba2d53fb
BG		 410 *
411 * Look for GDP nodes that are currently read by the HW.
412 *
413 * RETURNS:
414 * Pointer to the current GDP node list
415 */
416static
29d1dc62 417struct sti_gdp_node_list *sti_gdp_get_current_nodes(struct sti_gdp *gdp)
ba2d53fb
BG		 418{
419 int hw_nvn;
ba2d53fb
BG		 420 unsigned int i;
421
871bcdfe 422 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
ba2d53fb
BG		 423 if (!hw_nvn)
424 goto end;
425
ba2d53fb 426 for (i = 0; i < GDP_NODE_NB_BANK; i++)
a51fe84d
BG		 427 if ((hw_nvn == gdp->node_list[i].btm_field_paddr) ||
428 (hw_nvn == gdp->node_list[i].top_field_paddr))
ba2d53fb
BG		 429 return &gdp->node_list[i];
430
431end:
d219673d 432 DRM_DEBUG_DRIVER("Warning, NVN 0x%08X for %s does not match any node\n",
29d1dc62 433 hw_nvn, sti_plane_to_str(&gdp->plane));
d219673d 434
ba2d53fb
BG		 435 return NULL;
436}
437
ba2d53fb 438/**
871bcdfe 439 * sti_gdp_disable
29d1dc62 440 * @gdp: gdp pointer
ba2d53fb
BG		 441 *
442 * Disable a GDP.
ba2d53fb 443 */
29d1dc62 444static void sti_gdp_disable(struct sti_gdp *gdp)
ba2d53fb 445{
29d1dc62 446 unsigned int i;
d219673d 447
29d1dc62 448 DRM_DEBUG_DRIVER("%s\n", sti_plane_to_str(&gdp->plane));
ba2d53fb
BG		 449
450 /* Set the nodes as 'to be ignored on mixer' */
451 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
452 gdp->node_list[i].top_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
453 gdp->node_list[i].btm_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
454 }
455
20c47601 456 if (sti_vtg_unregister_client(gdp->vtg, &gdp->vtg_field_nb))
d219673d
BG		 457 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
458
ba2d53fb
BG		 459 if (gdp->clk_pix)
460 clk_disable_unprepare(gdp->clk_pix);
461
29d1dc62 462 gdp->plane.status = STI_PLANE_DISABLED;
ba2d53fb
BG		 463}
464
465/**
466 * sti_gdp_field_cb
467 * @nb: notifier block
468 * @event: event message
469 * @data: private data
470 *
471 * Handle VTG top field and bottom field event.
472 *
473 * RETURNS:
474 * 0 on success.
475 */
476int sti_gdp_field_cb(struct notifier_block *nb,
477 unsigned long event, void *data)
478{
479 struct sti_gdp *gdp = container_of(nb, struct sti_gdp, vtg_field_nb);
480
29d1dc62
VA		 481 if (gdp->plane.status == STI_PLANE_FLUSHING) {
482 /* disable need to be synchronize on vsync event */
483 DRM_DEBUG_DRIVER("Vsync event received => disable %s\n",
484 sti_plane_to_str(&gdp->plane));
485
486 sti_gdp_disable(gdp);
487 }
488
ba2d53fb
BG		 489 switch (event) {
490 case VTG_TOP_FIELD_EVENT:
491 gdp->is_curr_top = true;
492 break;
493 case VTG_BOTTOM_FIELD_EVENT:
494 gdp->is_curr_top = false;
495 break;
496 default:
497 DRM_ERROR("unsupported event: %lu\n", event);
498 break;
499 }
500
501 return 0;
502}
503
871bcdfe 504static void sti_gdp_init(struct sti_gdp *gdp)
ba2d53fb 505{
871bcdfe 506 struct device_node *np = gdp->dev->of_node;
a51fe84d 507 dma_addr_t dma_addr;
ba2d53fb
BG		 508 void *base;
509 unsigned int i, size;
510
511 /* Allocate all the nodes within a single memory page */
512 size = sizeof(struct sti_gdp_node) *
513 GDP_NODE_PER_FIELD * GDP_NODE_NB_BANK;
f6e45661 514 base = dma_alloc_wc(gdp->dev, size, &dma_addr, GFP_KERNEL | GFP_DMA);
a51fe84d 515
ba2d53fb
BG		 516 if (!base) {
517 DRM_ERROR("Failed to allocate memory for GDP node\n");
518 return;
519 }
520 memset(base, 0, size);
521
522 for (i = 0; i < GDP_NODE_NB_BANK; i++) {
a51fe84d 523 if (dma_addr & 0xF) {
ba2d53fb
BG		 524 DRM_ERROR("Mem alignment failed\n");
525 return;
526 }
527 gdp->node_list[i].top_field = base;
a51fe84d
BG		 528 gdp->node_list[i].top_field_paddr = dma_addr;
529
ba2d53fb
BG		 530 DRM_DEBUG_DRIVER("node[%d].top_field=%p\n", i, base);
531 base += sizeof(struct sti_gdp_node);
a51fe84d 532 dma_addr += sizeof(struct sti_gdp_node);
ba2d53fb 533
a51fe84d 534 if (dma_addr & 0xF) {
ba2d53fb
BG		 535 DRM_ERROR("Mem alignment failed\n");
536 return;
537 }
538 gdp->node_list[i].btm_field = base;
a51fe84d 539 gdp->node_list[i].btm_field_paddr = dma_addr;
ba2d53fb
BG		 540 DRM_DEBUG_DRIVER("node[%d].btm_field=%p\n", i, base);
541 base += sizeof(struct sti_gdp_node);
a51fe84d 542 dma_addr += sizeof(struct sti_gdp_node);
ba2d53fb
BG		 543 }
544
545 if (of_device_is_compatible(np, "st,stih407-compositor")) {
546 /* GDP of STiH407 chip have its own pixel clock */
547 char *clk_name;
548
871bcdfe 549 switch (gdp->plane.desc) {
ba2d53fb
BG		 550 case STI_GDP_0:
551 clk_name = "pix_gdp1";
552 break;
553 case STI_GDP_1:
554 clk_name = "pix_gdp2";
555 break;
556 case STI_GDP_2:
557 clk_name = "pix_gdp3";
558 break;
559 case STI_GDP_3:
560 clk_name = "pix_gdp4";
561 break;
562 default:
563 DRM_ERROR("GDP id not recognized\n");
564 return;
565 }
566
871bcdfe 567 gdp->clk_pix = devm_clk_get(gdp->dev, clk_name);
ba2d53fb
BG		 568 if (IS_ERR(gdp->clk_pix))
569 DRM_ERROR("Cannot get %s clock\n", clk_name);
5e03abc5 570
871bcdfe 571 gdp->clk_main_parent = devm_clk_get(gdp->dev, "main_parent");
5e03abc5
BG		 572 if (IS_ERR(gdp->clk_main_parent))
573 DRM_ERROR("Cannot get main_parent clock\n");
574
871bcdfe 575 gdp->clk_aux_parent = devm_clk_get(gdp->dev, "aux_parent");
5e03abc5
BG		 576 if (IS_ERR(gdp->clk_aux_parent))
577 DRM_ERROR("Cannot get aux_parent clock\n");
ba2d53fb
BG		 578 }
579}
580
a5b9a713
BH		 581/**
582 * sti_gdp_get_dst
583 * @dev: device
584 * @dst: requested destination size
585 * @src: source size
586 *
587 * Return the cropped / clamped destination size
588 *
589 * RETURNS:
590 * cropped / clamped destination size
591 */
592static int sti_gdp_get_dst(struct device *dev, int dst, int src)
593{
594 if (dst == src)
595 return dst;
596
597 if (dst < src) {
598 dev_dbg(dev, "WARNING: GDP scale not supported, will crop\n");
599 return dst;
600 }
601
602 dev_dbg(dev, "WARNING: GDP scale not supported, will clamp\n");
603 return src;
604}
605
dd86dc2f
VA		 606static int sti_gdp_atomic_check(struct drm_plane *drm_plane,
607 struct drm_plane_state *state)
29d1dc62 608{
29d1dc62
VA		 609 struct sti_plane *plane = to_sti_plane(drm_plane);
610 struct sti_gdp *gdp = to_sti_gdp(plane);
611 struct drm_crtc *crtc = state->crtc;
612 struct sti_compositor *compo = dev_get_drvdata(gdp->dev);
613 struct drm_framebuffer *fb = state->fb;
614 bool first_prepare = plane->status == STI_PLANE_DISABLED ? true : false;
dd86dc2f 615 struct drm_crtc_state *crtc_state;
29d1dc62
VA		 616 struct sti_mixer *mixer;
617 struct drm_display_mode *mode;
618 int dst_x, dst_y, dst_w, dst_h;
619 int src_x, src_y, src_w, src_h;
dd86dc2f
VA		 620 int format;
621
622 /* no need for further checks if the plane is being disabled */
623 if (!crtc || !fb)
624 return 0;
625
626 mixer = to_sti_mixer(crtc);
627 crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
628 mode = &crtc_state->mode;
629 dst_x = state->crtc_x;
630 dst_y = state->crtc_y;
631 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
632 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
633 /* src_x are in 16.16 format */
634 src_x = state->src_x >> 16;
635 src_y = state->src_y >> 16;
636 src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX);
637 src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX);
638
639 format = sti_gdp_fourcc2format(fb->pixel_format);
640 if (format == -1) {
641 DRM_ERROR("Format not supported by GDP %.4s\n",
642 (char *)&fb->pixel_format);
643 return -EINVAL;
644 }
645
646 if (!drm_fb_cma_get_gem_obj(fb, 0)) {
647 DRM_ERROR("Can't get CMA GEM object for fb\n");
648 return -EINVAL;
649 }
650
651 if (first_prepare) {
652 /* Register gdp callback */
653 gdp->vtg = mixer->id == STI_MIXER_MAIN ?
654 compo->vtg_main : compo->vtg_aux;
655 if (sti_vtg_register_client(gdp->vtg,
656 &gdp->vtg_field_nb, crtc)) {
657 DRM_ERROR("Cannot register VTG notifier\n");
658 return -EINVAL;
659 }
660
661 /* Set and enable gdp clock */
662 if (gdp->clk_pix) {
663 struct clk *clkp;
664 int rate = mode->clock * 1000;
665 int res;
666
667 /*
668 * According to the mixer used, the gdp pixel clock
669 * should have a different parent clock.
670 */
671 if (mixer->id == STI_MIXER_MAIN)
672 clkp = gdp->clk_main_parent;
673 else
674 clkp = gdp->clk_aux_parent;
675
676 if (clkp)
677 clk_set_parent(gdp->clk_pix, clkp);
678
679 res = clk_set_rate(gdp->clk_pix, rate);
680 if (res < 0) {
681 DRM_ERROR("Cannot set rate (%dHz) for gdp\n",
682 rate);
683 return -EINVAL;
684 }
685
686 if (clk_prepare_enable(gdp->clk_pix)) {
687 DRM_ERROR("Failed to prepare/enable gdp\n");
688 return -EINVAL;
689 }
690 }
691 }
692
693 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
694 crtc->base.id, sti_mixer_to_str(mixer),
695 drm_plane->base.id, sti_plane_to_str(plane));
696 DRM_DEBUG_KMS("%s dst=(%dx%d)@(%d,%d) - src=(%dx%d)@(%d,%d)\n",
697 sti_plane_to_str(plane),
698 dst_w, dst_h, dst_x, dst_y,
699 src_w, src_h, src_x, src_y);
700
701 return 0;
702}
703
704static void sti_gdp_atomic_update(struct drm_plane *drm_plane,
705 struct drm_plane_state *oldstate)
706{
707 struct drm_plane_state *state = drm_plane->state;
708 struct sti_plane *plane = to_sti_plane(drm_plane);
709 struct sti_gdp *gdp = to_sti_gdp(plane);
710 struct drm_crtc *crtc = state->crtc;
711 struct drm_framebuffer *fb = state->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;
29d1dc62
VA		 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 depth, bpp;
723 u32 ydo, xdo, yds, xds;
29d1dc62 724
dd86dc2f 725 if (!crtc || !fb)
29d1dc62
VA		 726 return;
727
29d1dc62
VA		 728 mode = &crtc->mode;
729 dst_x = state->crtc_x;
730 dst_y = state->crtc_y;
731 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
732 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
733 /* src_x are in 16.16 format */
734 src_x = state->src_x >> 16;
735 src_y = state->src_y >> 16;
a5b9a713
BH		 736 src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX);
737 src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX);
29d1dc62
VA		 738
739 list = sti_gdp_get_free_nodes(gdp);
740 top_field = list->top_field;
741 btm_field = list->btm_field;
742
743 dev_dbg(gdp->dev, "%s %s top_node:0x%p btm_node:0x%p\n", __func__,
744 sti_plane_to_str(plane), top_field, btm_field);
745
746 /* build the top field */
747 top_field->gam_gdp_agc = GAM_GDP_AGC_FULL_RANGE;
748 top_field->gam_gdp_ctl = WAIT_NEXT_VSYNC;
749 format = sti_gdp_fourcc2format(fb->pixel_format);
29d1dc62
VA		 750 top_field->gam_gdp_ctl |= format;
751 top_field->gam_gdp_ctl |= sti_gdp_get_alpharange(format);
752 top_field->gam_gdp_ppt &= ~GAM_GDP_PPT_IGNORE;
753
754 cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
29d1dc62
VA		 755
756 DRM_DEBUG_DRIVER("drm FB:%d format:%.4s phys@:0x%lx\n", fb->base.id,
757 (char *)&fb->pixel_format,
758 (unsigned long)cma_obj->paddr);
759
760 /* pixel memory location */
761 drm_fb_get_bpp_depth(fb->pixel_format, &depth, &bpp);
762 top_field->gam_gdp_pml = (u32)cma_obj->paddr + fb->offsets[0];
763 top_field->gam_gdp_pml += src_x * (bpp >> 3);
764 top_field->gam_gdp_pml += src_y * fb->pitches[0];
765
a5b9a713
BH		 766 /* output parameters (clamped / cropped) */
767 dst_w = sti_gdp_get_dst(gdp->dev, dst_w, src_w);
768 dst_h = sti_gdp_get_dst(gdp->dev, dst_h, src_h);
29d1dc62
VA		 769 ydo = sti_vtg_get_line_number(*mode, dst_y);
770 yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1);
771 xdo = sti_vtg_get_pixel_number(*mode, dst_x);
772 xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1);
773 top_field->gam_gdp_vpo = (ydo << 16) | xdo;
774 top_field->gam_gdp_vps = (yds << 16) | xds;
775
704cb30c
VA		 776 /* input parameters */
777 src_w = dst_w;
778 top_field->gam_gdp_pmp = fb->pitches[0];
779 top_field->gam_gdp_size = src_h << 16 | src_w;
780
29d1dc62
VA		 781 /* Same content and chained together */
782 memcpy(btm_field, top_field, sizeof(*btm_field));
783 top_field->gam_gdp_nvn = list->btm_field_paddr;
784 btm_field->gam_gdp_nvn = list->top_field_paddr;
785
786 /* Interlaced mode */
787 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
788 btm_field->gam_gdp_pml = top_field->gam_gdp_pml +
789 fb->pitches[0];
790
29d1dc62
VA		 791 /* Update the NVN field of the 'right' field of the current GDP node
792 * (being used by the HW) with the address of the updated ('free') top
793 * field GDP node.
794 * - In interlaced mode the 'right' field is the bottom field as we
795 * update frames starting from their top field
796 * - In progressive mode, we update both bottom and top fields which
797 * are equal nodes.
798 * At the next VSYNC, the updated node list will be used by the HW.
799 */
800 curr_list = sti_gdp_get_current_nodes(gdp);
801 dma_updated_top = list->top_field_paddr;
802 dma_updated_btm = list->btm_field_paddr;
803
804 dev_dbg(gdp->dev, "Current NVN:0x%X\n",
805 readl(gdp->regs + GAM_GDP_NVN_OFFSET));
806 dev_dbg(gdp->dev, "Posted buff: %lx current buff: %x\n",
807 (unsigned long)cma_obj->paddr,
808 readl(gdp->regs + GAM_GDP_PML_OFFSET));
809
810 if (!curr_list) {
811 /* First update or invalid node should directly write in the
812 * hw register */
813 DRM_DEBUG_DRIVER("%s first update (or invalid node)",
814 sti_plane_to_str(plane));
815
816 writel(gdp->is_curr_top ?
817 dma_updated_btm : dma_updated_top,
818 gdp->regs + GAM_GDP_NVN_OFFSET);
819 goto end;
820 }
821
822 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
823 if (gdp->is_curr_top) {
824 /* Do not update in the middle of the frame, but
825 * postpone the update after the bottom field has
826 * been displayed */
827 curr_list->btm_field->gam_gdp_nvn = dma_updated_top;
828 } else {
829 /* Direct update to avoid one frame delay */
830 writel(dma_updated_top,
831 gdp->regs + GAM_GDP_NVN_OFFSET);
832 }
833 } else {
834 /* Direct update for progressive to avoid one frame delay */
835 writel(dma_updated_top, gdp->regs + GAM_GDP_NVN_OFFSET);
836 }
837
838end:
bf8f9e4a
VA		 839 sti_plane_update_fps(plane, true, false);
840
29d1dc62
VA		 841 plane->status = STI_PLANE_UPDATED;
842}
843
844static void sti_gdp_atomic_disable(struct drm_plane *drm_plane,
845 struct drm_plane_state *oldstate)
846{
847 struct sti_plane *plane = to_sti_plane(drm_plane);
29d1dc62
VA		 848
849 if (!drm_plane->crtc) {
850 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
851 drm_plane->base.id);
852 return;
853 }
854
855 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
dd86dc2f
VA		 856 drm_plane->crtc->base.id,
857 sti_mixer_to_str(to_sti_mixer(drm_plane->crtc)),
29d1dc62
VA		 858 drm_plane->base.id, sti_plane_to_str(plane));
859
860 plane->status = STI_PLANE_DISABLING;
861}
862
863static const struct drm_plane_helper_funcs sti_gdp_helpers_funcs = {
dd86dc2f 864 .atomic_check = sti_gdp_atomic_check,
29d1dc62
VA		 865 .atomic_update = sti_gdp_atomic_update,
866 .atomic_disable = sti_gdp_atomic_disable,
ba2d53fb
BG		 867};
868
83af0a48
BG		 869static void sti_gdp_destroy(struct drm_plane *drm_plane)
870{
871 DRM_DEBUG_DRIVER("\n");
872
873 drm_plane_helper_disable(drm_plane);
874 drm_plane_cleanup(drm_plane);
875}
876
877static int sti_gdp_late_register(struct drm_plane *drm_plane)
878{
879 struct sti_plane *plane = to_sti_plane(drm_plane);
880 struct sti_gdp *gdp = to_sti_gdp(plane);
881
882 return gdp_debugfs_init(gdp, drm_plane->dev->primary);
883}
884
885struct drm_plane_funcs sti_gdp_plane_helpers_funcs = {
886 .update_plane = drm_atomic_helper_update_plane,
887 .disable_plane = drm_atomic_helper_disable_plane,
888 .destroy = sti_gdp_destroy,
889 .set_property = sti_plane_set_property,
890 .reset = drm_atomic_helper_plane_reset,
891 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
892 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
893 .late_register = sti_gdp_late_register,
894};
895
29d1dc62
VA		 896struct drm_plane *sti_gdp_create(struct drm_device *drm_dev,
897 struct device *dev, int desc,
898 void __iomem *baseaddr,
899 unsigned int possible_crtcs,
900 enum drm_plane_type type)
ba2d53fb
BG		 901{
902 struct sti_gdp *gdp;
29d1dc62 903 int res;
ba2d53fb
BG		 904
905 gdp = devm_kzalloc(dev, sizeof(*gdp), GFP_KERNEL);
906 if (!gdp) {
907 DRM_ERROR("Failed to allocate memory for GDP\n");
908 return NULL;
909 }
910
871bcdfe
VA		 911 gdp->dev = dev;
912 gdp->regs = baseaddr;
913 gdp->plane.desc = desc;
29d1dc62 914 gdp->plane.status = STI_PLANE_DISABLED;
871bcdfe 915
ba2d53fb
BG		 916 gdp->vtg_field_nb.notifier_call = sti_gdp_field_cb;
917
871bcdfe
VA		 918 sti_gdp_init(gdp);
919
29d1dc62
VA		 920 res = drm_universal_plane_init(drm_dev, &gdp->plane.drm_plane,
921 possible_crtcs,
83af0a48 922 &sti_gdp_plane_helpers_funcs,
29d1dc62
VA		 923 gdp_supported_formats,
924 ARRAY_SIZE(gdp_supported_formats),
b0b3b795 925 type, NULL);
29d1dc62
VA		 926 if (res) {
927 DRM_ERROR("Failed to initialize universal plane\n");
928 goto err;
929 }
930
931 drm_plane_helper_add(&gdp->plane.drm_plane, &sti_gdp_helpers_funcs);
932
933 sti_plane_init_property(&gdp->plane, type);
934
935 return &gdp->plane.drm_plane;
936
937err:
938 devm_kfree(dev, gdp);
939 return NULL;
ba2d53fb 940}
Linux kernel - Deliverables
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