1 /*
2 * rcar_du_vsp.h -- R-Car Display Unit VSP-Based Compositor
3 *
4 * Copyright (C) 2015 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <drm/drmP.h>
15 #include <drm/drm_atomic_helper.h>
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_fb_cma_helper.h>
19 #include <drm/drm_gem_cma_helper.h>
20 #include <drm/drm_gem_framebuffer_helper.h>
21 #include <drm/drm_plane_helper.h>
22
23 #include <linux/bitops.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/of_platform.h>
26 #include <linux/scatterlist.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
rcar_du_vsp_complete(void * private,bool completed,u32 crc)35 static void rcar_du_vsp_complete(void *private, bool completed, u32 crc)
36 {
37 struct rcar_du_crtc *crtc = private;
38
39 if (crtc->vblank_enable)
40 drm_crtc_handle_vblank(&crtc->crtc);
41
42 if (completed)
43 rcar_du_crtc_finish_page_flip(crtc);
44
45 drm_crtc_add_crc_entry(&crtc->crtc, false, 0, &crc);
46 }
47
rcar_du_vsp_enable(struct rcar_du_crtc * crtc)48 void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
49 {
50 const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
51 struct rcar_du_device *rcdu = crtc->group->dev;
52 struct vsp1_du_lif_config cfg = {
53 .width = mode->hdisplay,
54 .height = mode->vdisplay,
55 .callback = rcar_du_vsp_complete,
56 .callback_data = crtc,
57 };
58 struct rcar_du_plane_state state = {
59 .state = {
60 .alpha = DRM_BLEND_ALPHA_OPAQUE,
61 .crtc = &crtc->crtc,
62 .dst.x1 = 0,
63 .dst.y1 = 0,
64 .dst.x2 = mode->hdisplay,
65 .dst.y2 = mode->vdisplay,
66 .src.x1 = 0,
67 .src.y1 = 0,
68 .src.x2 = mode->hdisplay << 16,
69 .src.y2 = mode->vdisplay << 16,
70 .zpos = 0,
71 },
72 .format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
73 .source = RCAR_DU_PLANE_VSPD1,
74 .colorkey = 0,
75 };
76
77 if (rcdu->info->gen >= 3)
78 state.hwindex = (crtc->index % 2) ? 2 : 0;
79 else
80 state.hwindex = crtc->index % 2;
81
82 __rcar_du_plane_setup(crtc->group, &state);
83
84 /*
85 * Ensure that the plane source configuration takes effect by requesting
86 * a restart of the group. See rcar_du_plane_atomic_update() for a more
87 * detailed explanation.
88 *
89 * TODO: Check whether this is still needed on Gen3.
90 */
91 crtc->group->need_restart = true;
92
93 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
94 }
95
rcar_du_vsp_disable(struct rcar_du_crtc * crtc)96 void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
97 {
98 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
99 }
100
rcar_du_vsp_atomic_begin(struct rcar_du_crtc * crtc)101 void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
102 {
103 vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
104 }
105
rcar_du_vsp_atomic_flush(struct rcar_du_crtc * crtc)106 void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
107 {
108 struct vsp1_du_atomic_pipe_config cfg = { { 0, } };
109 struct rcar_du_crtc_state *state;
110
111 state = to_rcar_crtc_state(crtc->crtc.state);
112 cfg.crc = state->crc;
113
114 vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
115 }
116
117 /* Keep the two tables in sync. */
118 static const u32 formats_kms[] = {
119 DRM_FORMAT_RGB332,
120 DRM_FORMAT_ARGB4444,
121 DRM_FORMAT_XRGB4444,
122 DRM_FORMAT_ARGB1555,
123 DRM_FORMAT_XRGB1555,
124 DRM_FORMAT_RGB565,
125 DRM_FORMAT_BGR888,
126 DRM_FORMAT_RGB888,
127 DRM_FORMAT_BGRA8888,
128 DRM_FORMAT_BGRX8888,
129 DRM_FORMAT_ARGB8888,
130 DRM_FORMAT_XRGB8888,
131 DRM_FORMAT_UYVY,
132 DRM_FORMAT_VYUY,
133 DRM_FORMAT_YUYV,
134 DRM_FORMAT_YVYU,
135 DRM_FORMAT_NV12,
136 DRM_FORMAT_NV21,
137 DRM_FORMAT_NV16,
138 DRM_FORMAT_NV61,
139 DRM_FORMAT_YUV420,
140 DRM_FORMAT_YVU420,
141 DRM_FORMAT_YUV422,
142 DRM_FORMAT_YVU422,
143 DRM_FORMAT_YUV444,
144 DRM_FORMAT_YVU444,
145 };
146
147 static const u32 formats_v4l2[] = {
148 V4L2_PIX_FMT_RGB332,
149 V4L2_PIX_FMT_ARGB444,
150 V4L2_PIX_FMT_XRGB444,
151 V4L2_PIX_FMT_ARGB555,
152 V4L2_PIX_FMT_XRGB555,
153 V4L2_PIX_FMT_RGB565,
154 V4L2_PIX_FMT_RGB24,
155 V4L2_PIX_FMT_BGR24,
156 V4L2_PIX_FMT_ARGB32,
157 V4L2_PIX_FMT_XRGB32,
158 V4L2_PIX_FMT_ABGR32,
159 V4L2_PIX_FMT_XBGR32,
160 V4L2_PIX_FMT_UYVY,
161 V4L2_PIX_FMT_VYUY,
162 V4L2_PIX_FMT_YUYV,
163 V4L2_PIX_FMT_YVYU,
164 V4L2_PIX_FMT_NV12M,
165 V4L2_PIX_FMT_NV21M,
166 V4L2_PIX_FMT_NV16M,
167 V4L2_PIX_FMT_NV61M,
168 V4L2_PIX_FMT_YUV420M,
169 V4L2_PIX_FMT_YVU420M,
170 V4L2_PIX_FMT_YUV422M,
171 V4L2_PIX_FMT_YVU422M,
172 V4L2_PIX_FMT_YUV444M,
173 V4L2_PIX_FMT_YVU444M,
174 };
175
rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane * plane)176 static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
177 {
178 struct rcar_du_vsp_plane_state *state =
179 to_rcar_vsp_plane_state(plane->plane.state);
180 struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
181 struct drm_framebuffer *fb = plane->plane.state->fb;
182 struct vsp1_du_atomic_config cfg = {
183 .pixelformat = 0,
184 .pitch = fb->pitches[0],
185 .alpha = state->state.alpha >> 8,
186 .zpos = state->state.zpos,
187 };
188 unsigned int i;
189
190 cfg.src.left = state->state.src.x1 >> 16;
191 cfg.src.top = state->state.src.y1 >> 16;
192 cfg.src.width = drm_rect_width(&state->state.src) >> 16;
193 cfg.src.height = drm_rect_height(&state->state.src) >> 16;
194
195 cfg.dst.left = state->state.dst.x1;
196 cfg.dst.top = state->state.dst.y1;
197 cfg.dst.width = drm_rect_width(&state->state.dst);
198 cfg.dst.height = drm_rect_height(&state->state.dst);
199
200 for (i = 0; i < state->format->planes; ++i)
201 cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
202 + fb->offsets[i];
203
204 for (i = 0; i < ARRAY_SIZE(formats_kms); ++i) {
205 if (formats_kms[i] == state->format->fourcc) {
206 cfg.pixelformat = formats_v4l2[i];
207 break;
208 }
209 }
210
211 vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
212 plane->index, &cfg);
213 }
214
rcar_du_vsp_plane_prepare_fb(struct drm_plane * plane,struct drm_plane_state * state)215 static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
216 struct drm_plane_state *state)
217 {
218 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
219 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
220 struct rcar_du_device *rcdu = vsp->dev;
221 unsigned int i;
222 int ret;
223
224 /*
225 * There's no need to prepare (and unprepare) the framebuffer when the
226 * plane is not visible, as it will not be displayed.
227 */
228 if (!state->visible)
229 return 0;
230
231 for (i = 0; i < rstate->format->planes; ++i) {
232 struct drm_gem_cma_object *gem =
233 drm_fb_cma_get_gem_obj(state->fb, i);
234 struct sg_table *sgt = &rstate->sg_tables[i];
235
236 ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr, gem->paddr,
237 gem->base.size);
238 if (ret)
239 goto fail;
240
241 ret = vsp1_du_map_sg(vsp->vsp, sgt);
242 if (!ret) {
243 sg_free_table(sgt);
244 ret = -ENOMEM;
245 goto fail;
246 }
247 }
248
249 ret = drm_gem_fb_prepare_fb(plane, state);
250 if (ret)
251 goto fail;
252
253 return 0;
254
255 fail:
256 while (i--) {
257 struct sg_table *sgt = &rstate->sg_tables[i];
258
259 vsp1_du_unmap_sg(vsp->vsp, sgt);
260 sg_free_table(sgt);
261 }
262
263 return ret;
264 }
265
rcar_du_vsp_plane_cleanup_fb(struct drm_plane * plane,struct drm_plane_state * state)266 static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
267 struct drm_plane_state *state)
268 {
269 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
270 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
271 unsigned int i;
272
273 if (!state->visible)
274 return;
275
276 for (i = 0; i < rstate->format->planes; ++i) {
277 struct sg_table *sgt = &rstate->sg_tables[i];
278
279 vsp1_du_unmap_sg(vsp->vsp, sgt);
280 sg_free_table(sgt);
281 }
282 }
283
rcar_du_vsp_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state)284 static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
285 struct drm_plane_state *state)
286 {
287 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
288
289 return __rcar_du_plane_atomic_check(plane, state, &rstate->format);
290 }
291
rcar_du_vsp_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)292 static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
293 struct drm_plane_state *old_state)
294 {
295 struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
296 struct rcar_du_crtc *crtc = to_rcar_crtc(old_state->crtc);
297
298 if (plane->state->visible)
299 rcar_du_vsp_plane_setup(rplane);
300 else
301 vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
302 rplane->index, NULL);
303 }
304
305 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
306 .prepare_fb = rcar_du_vsp_plane_prepare_fb,
307 .cleanup_fb = rcar_du_vsp_plane_cleanup_fb,
308 .atomic_check = rcar_du_vsp_plane_atomic_check,
309 .atomic_update = rcar_du_vsp_plane_atomic_update,
310 };
311
312 static struct drm_plane_state *
rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane * plane)313 rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
314 {
315 struct rcar_du_vsp_plane_state *copy;
316
317 if (WARN_ON(!plane->state))
318 return NULL;
319
320 copy = kzalloc(sizeof(*copy), GFP_KERNEL);
321 if (copy == NULL)
322 return NULL;
323
324 __drm_atomic_helper_plane_duplicate_state(plane, ©->state);
325
326 return ©->state;
327 }
328
rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)329 static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
330 struct drm_plane_state *state)
331 {
332 __drm_atomic_helper_plane_destroy_state(state);
333 kfree(to_rcar_vsp_plane_state(state));
334 }
335
rcar_du_vsp_plane_reset(struct drm_plane * plane)336 static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
337 {
338 struct rcar_du_vsp_plane_state *state;
339
340 if (plane->state) {
341 rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
342 plane->state = NULL;
343 }
344
345 state = kzalloc(sizeof(*state), GFP_KERNEL);
346 if (state == NULL)
347 return;
348
349 state->state.alpha = DRM_BLEND_ALPHA_OPAQUE;
350 state->state.zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
351
352 plane->state = &state->state;
353 plane->state->plane = plane;
354 }
355
356 static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
357 .update_plane = drm_atomic_helper_update_plane,
358 .disable_plane = drm_atomic_helper_disable_plane,
359 .reset = rcar_du_vsp_plane_reset,
360 .destroy = drm_plane_cleanup,
361 .atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
362 .atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
363 };
364
rcar_du_vsp_init(struct rcar_du_vsp * vsp,struct device_node * np,unsigned int crtcs)365 int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
366 unsigned int crtcs)
367 {
368 struct rcar_du_device *rcdu = vsp->dev;
369 struct platform_device *pdev;
370 unsigned int num_crtcs = hweight32(crtcs);
371 unsigned int i;
372 int ret;
373
374 /* Find the VSP device and initialize it. */
375 pdev = of_find_device_by_node(np);
376 if (!pdev)
377 return -ENXIO;
378
379 vsp->vsp = &pdev->dev;
380
381 ret = vsp1_du_init(vsp->vsp);
382 if (ret < 0)
383 return ret;
384
385 /*
386 * The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
387 * 4 RPFs.
388 */
389 vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;
390
391 vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
392 sizeof(*vsp->planes), GFP_KERNEL);
393 if (!vsp->planes)
394 return -ENOMEM;
395
396 for (i = 0; i < vsp->num_planes; ++i) {
397 enum drm_plane_type type = i < num_crtcs
398 ? DRM_PLANE_TYPE_PRIMARY
399 : DRM_PLANE_TYPE_OVERLAY;
400 struct rcar_du_vsp_plane *plane = &vsp->planes[i];
401
402 plane->vsp = vsp;
403 plane->index = i;
404
405 ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
406 &rcar_du_vsp_plane_funcs,
407 formats_kms,
408 ARRAY_SIZE(formats_kms),
409 NULL, type, NULL);
410 if (ret < 0)
411 return ret;
412
413 drm_plane_helper_add(&plane->plane,
414 &rcar_du_vsp_plane_helper_funcs);
415
416 if (type == DRM_PLANE_TYPE_PRIMARY)
417 continue;
418
419 drm_plane_create_alpha_property(&plane->plane);
420 drm_plane_create_zpos_property(&plane->plane, 1, 1,
421 vsp->num_planes - 1);
422 }
423
424 return 0;
425 }
426