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