1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * R-Car Display Unit VSP-Based Compositor
4 *
5 * Copyright (C) 2015 Renesas Electronics Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <drm/drm_atomic.h>
11 #include <drm/drm_atomic_helper.h>
12 #include <drm/drm_blend.h>
13 #include <drm/drm_crtc.h>
14 #include <drm/drm_fb_dma_helper.h>
15 #include <drm/drm_fourcc.h>
16 #include <drm/drm_framebuffer.h>
17 #include <drm/drm_gem_atomic_helper.h>
18 #include <drm/drm_gem_dma_helper.h>
19 #include <drm/drm_managed.h>
20 #include <drm/drm_vblank.h>
21
22 #include <linux/bitops.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/of_platform.h>
25 #include <linux/platform_device.h>
26 #include <linux/scatterlist.h>
27 #include <linux/slab.h>
28 #include <linux/videodev2.h>
29
30 #include <media/vsp1.h>
31
32 #include "rcar_du_drv.h"
33 #include "rcar_du_kms.h"
34 #include "rcar_du_vsp.h"
35 #include "rcar_du_writeback.h"
36
rcar_du_vsp_complete(void * private,unsigned int status,u32 crc)37 static void rcar_du_vsp_complete(void *private, unsigned int status, u32 crc)
38 {
39 struct rcar_du_crtc *crtc = private;
40
41 if (crtc->vblank_enable)
42 drm_crtc_handle_vblank(&crtc->crtc);
43
44 if (status & VSP1_DU_STATUS_COMPLETE)
45 rcar_du_crtc_finish_page_flip(crtc);
46 if (status & VSP1_DU_STATUS_WRITEBACK)
47 rcar_du_writeback_complete(crtc);
48
49 drm_crtc_add_crc_entry(&crtc->crtc, false, 0, &crc);
50 }
51
rcar_du_vsp_enable(struct rcar_du_crtc * crtc)52 void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
53 {
54 const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
55 struct rcar_du_device *rcdu = crtc->dev;
56 struct vsp1_du_lif_config cfg = {
57 .width = mode->hdisplay,
58 .height = mode->vdisplay,
59 .interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE,
60 .callback = rcar_du_vsp_complete,
61 .callback_data = crtc,
62 };
63 struct rcar_du_plane_state state = {
64 .state = {
65 .alpha = DRM_BLEND_ALPHA_OPAQUE,
66 .crtc = &crtc->crtc,
67 .dst.x1 = 0,
68 .dst.y1 = 0,
69 .dst.x2 = mode->hdisplay,
70 .dst.y2 = mode->vdisplay,
71 .src.x1 = 0,
72 .src.y1 = 0,
73 .src.x2 = mode->hdisplay << 16,
74 .src.y2 = mode->vdisplay << 16,
75 .zpos = 0,
76 },
77 .format = rcar_du_format_info(DRM_FORMAT_XRGB8888),
78 .source = RCAR_DU_PLANE_VSPD1,
79 .colorkey = 0,
80 };
81
82 if (rcdu->info->gen >= 3)
83 state.hwindex = (crtc->index % 2) ? 2 : 0;
84 else
85 state.hwindex = crtc->index % 2;
86
87 __rcar_du_plane_setup(crtc->group, &state);
88
89 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
90 }
91
rcar_du_vsp_disable(struct rcar_du_crtc * crtc)92 void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
93 {
94 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
95 }
96
rcar_du_vsp_atomic_begin(struct rcar_du_crtc * crtc)97 void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
98 {
99 vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
100 }
101
rcar_du_vsp_atomic_flush(struct rcar_du_crtc * crtc)102 void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
103 {
104 struct vsp1_du_atomic_pipe_config cfg = { { 0, } };
105 struct rcar_du_crtc_state *state;
106
107 state = to_rcar_crtc_state(crtc->crtc.state);
108 cfg.crc = state->crc;
109
110 rcar_du_writeback_setup(crtc, &cfg.writeback);
111
112 vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
113 }
114
115 static const u32 rcar_du_vsp_formats[] = {
116 DRM_FORMAT_RGB332,
117 DRM_FORMAT_ARGB4444,
118 DRM_FORMAT_XRGB4444,
119 DRM_FORMAT_ARGB1555,
120 DRM_FORMAT_XRGB1555,
121 DRM_FORMAT_RGB565,
122 DRM_FORMAT_BGR888,
123 DRM_FORMAT_RGB888,
124 DRM_FORMAT_BGRA8888,
125 DRM_FORMAT_BGRX8888,
126 DRM_FORMAT_ABGR8888,
127 DRM_FORMAT_XBGR8888,
128 DRM_FORMAT_ARGB8888,
129 DRM_FORMAT_XRGB8888,
130 DRM_FORMAT_UYVY,
131 DRM_FORMAT_YUYV,
132 DRM_FORMAT_YVYU,
133 DRM_FORMAT_NV12,
134 DRM_FORMAT_NV21,
135 DRM_FORMAT_NV16,
136 DRM_FORMAT_NV61,
137 DRM_FORMAT_YUV420,
138 DRM_FORMAT_YVU420,
139 DRM_FORMAT_YUV422,
140 DRM_FORMAT_YVU422,
141 DRM_FORMAT_YUV444,
142 DRM_FORMAT_YVU444,
143 };
144
145 /*
146 * Gen4 supports the same formats as above, and additionally 2-10-10-10 RGB
147 * formats and Y210 & Y212 formats.
148 */
149 static const u32 rcar_du_vsp_formats_gen4[] = {
150 DRM_FORMAT_RGB332,
151 DRM_FORMAT_ARGB4444,
152 DRM_FORMAT_XRGB4444,
153 DRM_FORMAT_ARGB1555,
154 DRM_FORMAT_XRGB1555,
155 DRM_FORMAT_RGB565,
156 DRM_FORMAT_BGR888,
157 DRM_FORMAT_RGB888,
158 DRM_FORMAT_BGRA8888,
159 DRM_FORMAT_BGRX8888,
160 DRM_FORMAT_ABGR8888,
161 DRM_FORMAT_XBGR8888,
162 DRM_FORMAT_ARGB8888,
163 DRM_FORMAT_XRGB8888,
164 DRM_FORMAT_RGBX1010102,
165 DRM_FORMAT_RGBA1010102,
166 DRM_FORMAT_ARGB2101010,
167 DRM_FORMAT_UYVY,
168 DRM_FORMAT_YUYV,
169 DRM_FORMAT_YVYU,
170 DRM_FORMAT_NV12,
171 DRM_FORMAT_NV21,
172 DRM_FORMAT_NV16,
173 DRM_FORMAT_NV61,
174 DRM_FORMAT_YUV420,
175 DRM_FORMAT_YVU420,
176 DRM_FORMAT_YUV422,
177 DRM_FORMAT_YVU422,
178 DRM_FORMAT_YUV444,
179 DRM_FORMAT_YVU444,
180 DRM_FORMAT_Y210,
181 DRM_FORMAT_Y212,
182 };
183
rcar_du_vsp_state_get_format(struct rcar_du_vsp_plane_state * state)184 static u32 rcar_du_vsp_state_get_format(struct rcar_du_vsp_plane_state *state)
185 {
186 u32 fourcc = state->format->fourcc;
187
188 if (state->state.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
189 switch (fourcc) {
190 case DRM_FORMAT_ARGB1555:
191 fourcc = DRM_FORMAT_XRGB1555;
192 break;
193
194 case DRM_FORMAT_ARGB4444:
195 fourcc = DRM_FORMAT_XRGB4444;
196 break;
197
198 case DRM_FORMAT_ARGB8888:
199 fourcc = DRM_FORMAT_XRGB8888;
200 break;
201
202 case DRM_FORMAT_ABGR8888:
203 fourcc = DRM_FORMAT_XBGR8888;
204 break;
205
206 case DRM_FORMAT_BGRA8888:
207 fourcc = DRM_FORMAT_BGRX8888;
208 break;
209
210 case DRM_FORMAT_RGBA1010102:
211 fourcc = DRM_FORMAT_RGBX1010102;
212 break;
213 }
214 }
215
216 return fourcc;
217 }
218
rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane * plane)219 static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
220 {
221 struct rcar_du_vsp_plane_state *state =
222 to_rcar_vsp_plane_state(plane->plane.state);
223 struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
224 struct drm_framebuffer *fb = plane->plane.state->fb;
225 const struct rcar_du_format_info *format;
226 struct vsp1_du_atomic_config cfg = {
227 .pixelformat = 0,
228 .pitch = fb->pitches[0],
229 .alpha = state->state.alpha >> 8,
230 .zpos = state->state.zpos,
231 };
232 u32 fourcc = rcar_du_vsp_state_get_format(state);
233 unsigned int i;
234
235 cfg.src.left = state->state.src.x1 >> 16;
236 cfg.src.top = state->state.src.y1 >> 16;
237 cfg.src.width = drm_rect_width(&state->state.src) >> 16;
238 cfg.src.height = drm_rect_height(&state->state.src) >> 16;
239
240 cfg.dst.left = state->state.dst.x1;
241 cfg.dst.top = state->state.dst.y1;
242 cfg.dst.width = drm_rect_width(&state->state.dst);
243 cfg.dst.height = drm_rect_height(&state->state.dst);
244
245 for (i = 0; i < state->format->planes; ++i)
246 cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
247 + fb->offsets[i];
248
249 format = rcar_du_format_info(fourcc);
250 cfg.pixelformat = format->v4l2;
251
252 cfg.premult = state->state.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI;
253
254 vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
255 plane->index, &cfg);
256 }
257
rcar_du_vsp_map_fb(struct rcar_du_vsp * vsp,struct drm_framebuffer * fb,struct sg_table sg_tables[3])258 int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
259 struct sg_table sg_tables[3])
260 {
261 struct rcar_du_device *rcdu = vsp->dev;
262 unsigned int i, j;
263 int ret;
264
265 for (i = 0; i < fb->format->num_planes; ++i) {
266 struct drm_gem_dma_object *gem = drm_fb_dma_get_gem_obj(fb, i);
267 struct sg_table *sgt = &sg_tables[i];
268
269 if (gem->sgt) {
270 struct scatterlist *src;
271 struct scatterlist *dst;
272
273 /*
274 * If the GEM buffer has a scatter gather table, it has
275 * been imported from a dma-buf and has no physical
276 * address as it might not be physically contiguous.
277 * Copy the original scatter gather table to map it to
278 * the VSP.
279 */
280 ret = sg_alloc_table(sgt, gem->sgt->orig_nents,
281 GFP_KERNEL);
282 if (ret)
283 goto fail;
284
285 src = gem->sgt->sgl;
286 dst = sgt->sgl;
287 for (j = 0; j < gem->sgt->orig_nents; ++j) {
288 sg_set_page(dst, sg_page(src), src->length,
289 src->offset);
290 src = sg_next(src);
291 dst = sg_next(dst);
292 }
293 } else {
294 ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr,
295 gem->dma_addr, gem->base.size);
296 if (ret)
297 goto fail;
298 }
299
300 ret = vsp1_du_map_sg(vsp->vsp, sgt);
301 if (ret) {
302 sg_free_table(sgt);
303 goto fail;
304 }
305 }
306
307 return 0;
308
309 fail:
310 while (i--) {
311 struct sg_table *sgt = &sg_tables[i];
312
313 vsp1_du_unmap_sg(vsp->vsp, sgt);
314 sg_free_table(sgt);
315 }
316
317 return ret;
318 }
319
rcar_du_vsp_plane_prepare_fb(struct drm_plane * plane,struct drm_plane_state * state)320 static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
321 struct drm_plane_state *state)
322 {
323 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
324 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
325 int ret;
326
327 /*
328 * There's no need to prepare (and unprepare) the framebuffer when the
329 * plane is not visible, as it will not be displayed.
330 */
331 if (!state->visible)
332 return 0;
333
334 ret = rcar_du_vsp_map_fb(vsp, state->fb, rstate->sg_tables);
335 if (ret < 0)
336 return ret;
337
338 return drm_gem_plane_helper_prepare_fb(plane, state);
339 }
340
rcar_du_vsp_unmap_fb(struct rcar_du_vsp * vsp,struct drm_framebuffer * fb,struct sg_table sg_tables[3])341 void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
342 struct sg_table sg_tables[3])
343 {
344 unsigned int i;
345
346 for (i = 0; i < fb->format->num_planes; ++i) {
347 struct sg_table *sgt = &sg_tables[i];
348
349 vsp1_du_unmap_sg(vsp->vsp, sgt);
350 sg_free_table(sgt);
351 }
352 }
353
rcar_du_vsp_plane_cleanup_fb(struct drm_plane * plane,struct drm_plane_state * state)354 static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
355 struct drm_plane_state *state)
356 {
357 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
358 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
359
360 if (!state->visible)
361 return;
362
363 rcar_du_vsp_unmap_fb(vsp, state->fb, rstate->sg_tables);
364 }
365
rcar_du_vsp_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)366 static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
367 struct drm_atomic_state *state)
368 {
369 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
370 plane);
371 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(new_plane_state);
372
373 return __rcar_du_plane_atomic_check(plane, new_plane_state,
374 &rstate->format);
375 }
376
rcar_du_vsp_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)377 static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
378 struct drm_atomic_state *state)
379 {
380 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
381 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
382 struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
383 struct rcar_du_crtc *crtc = to_rcar_crtc(old_state->crtc);
384
385 if (new_state->visible)
386 rcar_du_vsp_plane_setup(rplane);
387 else if (old_state->crtc)
388 vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
389 rplane->index, NULL);
390 }
391
392 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
393 .prepare_fb = rcar_du_vsp_plane_prepare_fb,
394 .cleanup_fb = rcar_du_vsp_plane_cleanup_fb,
395 .atomic_check = rcar_du_vsp_plane_atomic_check,
396 .atomic_update = rcar_du_vsp_plane_atomic_update,
397 };
398
399 static struct drm_plane_state *
rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane * plane)400 rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
401 {
402 struct rcar_du_vsp_plane_state *copy;
403
404 if (WARN_ON(!plane->state))
405 return NULL;
406
407 copy = kzalloc(sizeof(*copy), GFP_KERNEL);
408 if (copy == NULL)
409 return NULL;
410
411 __drm_atomic_helper_plane_duplicate_state(plane, ©->state);
412
413 return ©->state;
414 }
415
rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)416 static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
417 struct drm_plane_state *state)
418 {
419 __drm_atomic_helper_plane_destroy_state(state);
420 kfree(to_rcar_vsp_plane_state(state));
421 }
422
rcar_du_vsp_plane_reset(struct drm_plane * plane)423 static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
424 {
425 struct rcar_du_vsp_plane_state *state;
426
427 if (plane->state) {
428 rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
429 plane->state = NULL;
430 }
431
432 state = kzalloc(sizeof(*state), GFP_KERNEL);
433 if (state == NULL)
434 return;
435
436 __drm_atomic_helper_plane_reset(plane, &state->state);
437 }
438
439 static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
440 .update_plane = drm_atomic_helper_update_plane,
441 .disable_plane = drm_atomic_helper_disable_plane,
442 .reset = rcar_du_vsp_plane_reset,
443 .destroy = drm_plane_cleanup,
444 .atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
445 .atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
446 };
447
rcar_du_vsp_cleanup(struct drm_device * dev,void * res)448 static void rcar_du_vsp_cleanup(struct drm_device *dev, void *res)
449 {
450 struct rcar_du_vsp *vsp = res;
451 unsigned int i;
452
453 for (i = 0; i < vsp->num_planes; ++i) {
454 struct rcar_du_vsp_plane *plane = &vsp->planes[i];
455
456 drm_plane_cleanup(&plane->plane);
457 }
458
459 kfree(vsp->planes);
460
461 put_device(vsp->vsp);
462 }
463
rcar_du_vsp_init(struct rcar_du_vsp * vsp,struct device_node * np,unsigned int crtcs)464 int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
465 unsigned int crtcs)
466 {
467 struct rcar_du_device *rcdu = vsp->dev;
468 struct platform_device *pdev;
469 unsigned int num_crtcs = hweight32(crtcs);
470 unsigned int num_planes;
471 unsigned int i;
472 int ret;
473
474 /* Find the VSP device and initialize it. */
475 pdev = of_find_device_by_node(np);
476 if (!pdev)
477 return -ENXIO;
478
479 vsp->vsp = &pdev->dev;
480
481 ret = drmm_add_action_or_reset(&rcdu->ddev, rcar_du_vsp_cleanup, vsp);
482 if (ret < 0)
483 return ret;
484
485 ret = vsp1_du_init(vsp->vsp);
486 if (ret < 0)
487 return ret;
488
489 num_planes = rcdu->info->num_rpf;
490
491 vsp->planes = kcalloc(num_planes, sizeof(*vsp->planes), GFP_KERNEL);
492 if (!vsp->planes)
493 return -ENOMEM;
494
495 for (i = 0; i < num_planes; ++i) {
496 enum drm_plane_type type = i < num_crtcs
497 ? DRM_PLANE_TYPE_PRIMARY
498 : DRM_PLANE_TYPE_OVERLAY;
499 struct rcar_du_vsp_plane *plane = &vsp->planes[i];
500 unsigned int num_formats;
501 const u32 *formats;
502
503 if (rcdu->info->gen < 4) {
504 num_formats = ARRAY_SIZE(rcar_du_vsp_formats);
505 formats = rcar_du_vsp_formats;
506 } else {
507 num_formats = ARRAY_SIZE(rcar_du_vsp_formats_gen4);
508 formats = rcar_du_vsp_formats_gen4;
509 }
510
511 plane->vsp = vsp;
512 plane->index = i;
513
514 ret = drm_universal_plane_init(&rcdu->ddev, &plane->plane,
515 crtcs, &rcar_du_vsp_plane_funcs,
516 formats, num_formats,
517 NULL, type, NULL);
518 if (ret < 0)
519 return ret;
520
521 drm_plane_helper_add(&plane->plane,
522 &rcar_du_vsp_plane_helper_funcs);
523
524 drm_plane_create_alpha_property(&plane->plane);
525 drm_plane_create_zpos_property(&plane->plane, i, 0,
526 num_planes - 1);
527
528 drm_plane_create_blend_mode_property(&plane->plane,
529 BIT(DRM_MODE_BLEND_PIXEL_NONE) |
530 BIT(DRM_MODE_BLEND_PREMULTI) |
531 BIT(DRM_MODE_BLEND_COVERAGE));
532
533 vsp->num_planes++;
534 }
535
536 return 0;
537 }
538