1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * rcar_du_vsp.h -- 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_helper.h>
11 #include <drm/drm_crtc.h>
12 #include <drm/drm_fb_cma_helper.h>
13 #include <drm/drm_fourcc.h>
14 #include <drm/drm_gem_cma_helper.h>
15 #include <drm/drm_gem_framebuffer_helper.h>
16 #include <drm/drm_managed.h>
17 #include <drm/drm_plane_helper.h>
18 #include <drm/drm_vblank.h>
19
20 #include <linux/bitops.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/of_platform.h>
23 #include <linux/scatterlist.h>
24 #include <linux/videodev2.h>
25
26 #include <media/vsp1.h>
27
28 #include "rcar_du_drv.h"
29 #include "rcar_du_kms.h"
30 #include "rcar_du_vsp.h"
31 #include "rcar_du_writeback.h"
32
rcar_du_vsp_complete(void * private,unsigned int status,u32 crc)33 static void rcar_du_vsp_complete(void *private, unsigned int status, u32 crc)
34 {
35 struct rcar_du_crtc *crtc = private;
36
37 if (crtc->vblank_enable)
38 drm_crtc_handle_vblank(&crtc->crtc);
39
40 if (status & VSP1_DU_STATUS_COMPLETE)
41 rcar_du_crtc_finish_page_flip(crtc);
42 if (status & VSP1_DU_STATUS_WRITEBACK)
43 rcar_du_writeback_complete(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->dev;
52 struct vsp1_du_lif_config cfg = {
53 .width = mode->hdisplay,
54 .height = mode->vdisplay,
55 .interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE,
56 .callback = rcar_du_vsp_complete,
57 .callback_data = crtc,
58 };
59 struct rcar_du_plane_state state = {
60 .state = {
61 .alpha = DRM_BLEND_ALPHA_OPAQUE,
62 .crtc = &crtc->crtc,
63 .dst.x1 = 0,
64 .dst.y1 = 0,
65 .dst.x2 = mode->hdisplay,
66 .dst.y2 = mode->vdisplay,
67 .src.x1 = 0,
68 .src.y1 = 0,
69 .src.x2 = mode->hdisplay << 16,
70 .src.y2 = mode->vdisplay << 16,
71 .zpos = 0,
72 },
73 .format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
74 .source = RCAR_DU_PLANE_VSPD1,
75 .colorkey = 0,
76 };
77
78 if (rcdu->info->gen >= 3)
79 state.hwindex = (crtc->index % 2) ? 2 : 0;
80 else
81 state.hwindex = crtc->index % 2;
82
83 __rcar_du_plane_setup(crtc->group, &state);
84
85 /*
86 * Ensure that the plane source configuration takes effect by requesting
87 * a restart of the group. See rcar_du_plane_atomic_update() for a more
88 * detailed explanation.
89 *
90 * TODO: Check whether this is still needed on Gen3.
91 */
92 crtc->group->need_restart = true;
93
94 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
95 }
96
rcar_du_vsp_disable(struct rcar_du_crtc * crtc)97 void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
98 {
99 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
100 }
101
rcar_du_vsp_atomic_begin(struct rcar_du_crtc * crtc)102 void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
103 {
104 vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
105 }
106
rcar_du_vsp_atomic_flush(struct rcar_du_crtc * crtc)107 void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
108 {
109 struct vsp1_du_atomic_pipe_config cfg = { { 0, } };
110 struct rcar_du_crtc_state *state;
111
112 state = to_rcar_crtc_state(crtc->crtc.state);
113 cfg.crc = state->crc;
114
115 rcar_du_writeback_setup(crtc, &cfg.writeback);
116
117 vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
118 }
119
120 static const u32 rcar_du_vsp_formats[] = {
121 DRM_FORMAT_RGB332,
122 DRM_FORMAT_ARGB4444,
123 DRM_FORMAT_XRGB4444,
124 DRM_FORMAT_ARGB1555,
125 DRM_FORMAT_XRGB1555,
126 DRM_FORMAT_RGB565,
127 DRM_FORMAT_BGR888,
128 DRM_FORMAT_RGB888,
129 DRM_FORMAT_BGRA8888,
130 DRM_FORMAT_BGRX8888,
131 DRM_FORMAT_ARGB8888,
132 DRM_FORMAT_XRGB8888,
133 DRM_FORMAT_UYVY,
134 DRM_FORMAT_YUYV,
135 DRM_FORMAT_YVYU,
136 DRM_FORMAT_NV12,
137 DRM_FORMAT_NV21,
138 DRM_FORMAT_NV16,
139 DRM_FORMAT_NV61,
140 DRM_FORMAT_YUV420,
141 DRM_FORMAT_YVU420,
142 DRM_FORMAT_YUV422,
143 DRM_FORMAT_YVU422,
144 DRM_FORMAT_YUV444,
145 DRM_FORMAT_YVU444,
146 };
147
rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane * plane)148 static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
149 {
150 struct rcar_du_vsp_plane_state *state =
151 to_rcar_vsp_plane_state(plane->plane.state);
152 struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
153 struct drm_framebuffer *fb = plane->plane.state->fb;
154 const struct rcar_du_format_info *format;
155 struct vsp1_du_atomic_config cfg = {
156 .pixelformat = 0,
157 .pitch = fb->pitches[0],
158 .alpha = state->state.alpha >> 8,
159 .zpos = state->state.zpos,
160 };
161 unsigned int i;
162
163 cfg.src.left = state->state.src.x1 >> 16;
164 cfg.src.top = state->state.src.y1 >> 16;
165 cfg.src.width = drm_rect_width(&state->state.src) >> 16;
166 cfg.src.height = drm_rect_height(&state->state.src) >> 16;
167
168 cfg.dst.left = state->state.dst.x1;
169 cfg.dst.top = state->state.dst.y1;
170 cfg.dst.width = drm_rect_width(&state->state.dst);
171 cfg.dst.height = drm_rect_height(&state->state.dst);
172
173 for (i = 0; i < state->format->planes; ++i)
174 cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
175 + fb->offsets[i];
176
177 format = rcar_du_format_info(state->format->fourcc);
178 cfg.pixelformat = format->v4l2;
179
180 vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
181 plane->index, &cfg);
182 }
183
rcar_du_vsp_map_fb(struct rcar_du_vsp * vsp,struct drm_framebuffer * fb,struct sg_table sg_tables[3])184 int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
185 struct sg_table sg_tables[3])
186 {
187 struct rcar_du_device *rcdu = vsp->dev;
188 unsigned int i;
189 int ret;
190
191 for (i = 0; i < fb->format->num_planes; ++i) {
192 struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, i);
193 struct sg_table *sgt = &sg_tables[i];
194
195 ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr, gem->paddr,
196 gem->base.size);
197 if (ret)
198 goto fail;
199
200 ret = vsp1_du_map_sg(vsp->vsp, sgt);
201 if (ret) {
202 sg_free_table(sgt);
203 goto fail;
204 }
205 }
206
207 return 0;
208
209 fail:
210 while (i--) {
211 struct sg_table *sgt = &sg_tables[i];
212
213 vsp1_du_unmap_sg(vsp->vsp, sgt);
214 sg_free_table(sgt);
215 }
216
217 return ret;
218 }
219
rcar_du_vsp_plane_prepare_fb(struct drm_plane * plane,struct drm_plane_state * state)220 static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
221 struct drm_plane_state *state)
222 {
223 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
224 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
225 int ret;
226
227 /*
228 * There's no need to prepare (and unprepare) the framebuffer when the
229 * plane is not visible, as it will not be displayed.
230 */
231 if (!state->visible)
232 return 0;
233
234 ret = rcar_du_vsp_map_fb(vsp, state->fb, rstate->sg_tables);
235 if (ret < 0)
236 return ret;
237
238 return drm_gem_fb_prepare_fb(plane, state);
239 }
240
rcar_du_vsp_unmap_fb(struct rcar_du_vsp * vsp,struct drm_framebuffer * fb,struct sg_table sg_tables[3])241 void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
242 struct sg_table sg_tables[3])
243 {
244 unsigned int i;
245
246 for (i = 0; i < fb->format->num_planes; ++i) {
247 struct sg_table *sgt = &sg_tables[i];
248
249 vsp1_du_unmap_sg(vsp->vsp, sgt);
250 sg_free_table(sgt);
251 }
252 }
253
rcar_du_vsp_plane_cleanup_fb(struct drm_plane * plane,struct drm_plane_state * state)254 static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
255 struct drm_plane_state *state)
256 {
257 struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
258 struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
259
260 if (!state->visible)
261 return;
262
263 rcar_du_vsp_unmap_fb(vsp, state->fb, rstate->sg_tables);
264 }
265
rcar_du_vsp_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state)266 static int rcar_du_vsp_plane_atomic_check(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
271 return __rcar_du_plane_atomic_check(plane, state, &rstate->format);
272 }
273
rcar_du_vsp_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)274 static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
275 struct drm_plane_state *old_state)
276 {
277 struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
278 struct rcar_du_crtc *crtc = to_rcar_crtc(old_state->crtc);
279
280 if (plane->state->visible)
281 rcar_du_vsp_plane_setup(rplane);
282 else if (old_state->crtc)
283 vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
284 rplane->index, NULL);
285 }
286
287 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
288 .prepare_fb = rcar_du_vsp_plane_prepare_fb,
289 .cleanup_fb = rcar_du_vsp_plane_cleanup_fb,
290 .atomic_check = rcar_du_vsp_plane_atomic_check,
291 .atomic_update = rcar_du_vsp_plane_atomic_update,
292 };
293
294 static struct drm_plane_state *
rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane * plane)295 rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
296 {
297 struct rcar_du_vsp_plane_state *copy;
298
299 if (WARN_ON(!plane->state))
300 return NULL;
301
302 copy = kzalloc(sizeof(*copy), GFP_KERNEL);
303 if (copy == NULL)
304 return NULL;
305
306 __drm_atomic_helper_plane_duplicate_state(plane, ©->state);
307
308 return ©->state;
309 }
310
rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)311 static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
312 struct drm_plane_state *state)
313 {
314 __drm_atomic_helper_plane_destroy_state(state);
315 kfree(to_rcar_vsp_plane_state(state));
316 }
317
rcar_du_vsp_plane_reset(struct drm_plane * plane)318 static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
319 {
320 struct rcar_du_vsp_plane_state *state;
321
322 if (plane->state) {
323 rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
324 plane->state = NULL;
325 }
326
327 state = kzalloc(sizeof(*state), GFP_KERNEL);
328 if (state == NULL)
329 return;
330
331 __drm_atomic_helper_plane_reset(plane, &state->state);
332 state->state.zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
333 }
334
335 static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
336 .update_plane = drm_atomic_helper_update_plane,
337 .disable_plane = drm_atomic_helper_disable_plane,
338 .reset = rcar_du_vsp_plane_reset,
339 .destroy = drm_plane_cleanup,
340 .atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
341 .atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
342 };
343
rcar_du_vsp_cleanup(struct drm_device * dev,void * res)344 static void rcar_du_vsp_cleanup(struct drm_device *dev, void *res)
345 {
346 struct rcar_du_vsp *vsp = res;
347
348 put_device(vsp->vsp);
349 }
350
rcar_du_vsp_init(struct rcar_du_vsp * vsp,struct device_node * np,unsigned int crtcs)351 int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
352 unsigned int crtcs)
353 {
354 struct rcar_du_device *rcdu = vsp->dev;
355 struct platform_device *pdev;
356 unsigned int num_crtcs = hweight32(crtcs);
357 unsigned int i;
358 int ret;
359
360 /* Find the VSP device and initialize it. */
361 pdev = of_find_device_by_node(np);
362 if (!pdev)
363 return -ENXIO;
364
365 vsp->vsp = &pdev->dev;
366
367 ret = drmm_add_action(rcdu->ddev, rcar_du_vsp_cleanup, vsp);
368 if (ret < 0)
369 return ret;
370
371 ret = vsp1_du_init(vsp->vsp);
372 if (ret < 0)
373 return ret;
374
375 /*
376 * The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
377 * 4 RPFs.
378 */
379 vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;
380
381 vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
382 sizeof(*vsp->planes), GFP_KERNEL);
383 if (!vsp->planes)
384 return -ENOMEM;
385
386 for (i = 0; i < vsp->num_planes; ++i) {
387 enum drm_plane_type type = i < num_crtcs
388 ? DRM_PLANE_TYPE_PRIMARY
389 : DRM_PLANE_TYPE_OVERLAY;
390 struct rcar_du_vsp_plane *plane = &vsp->planes[i];
391
392 plane->vsp = vsp;
393 plane->index = i;
394
395 ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
396 &rcar_du_vsp_plane_funcs,
397 rcar_du_vsp_formats,
398 ARRAY_SIZE(rcar_du_vsp_formats),
399 NULL, type, NULL);
400 if (ret < 0)
401 return ret;
402
403 drm_plane_helper_add(&plane->plane,
404 &rcar_du_vsp_plane_helper_funcs);
405
406 if (type == DRM_PLANE_TYPE_PRIMARY) {
407 drm_plane_create_zpos_immutable_property(&plane->plane,
408 0);
409 } else {
410 drm_plane_create_alpha_property(&plane->plane);
411 drm_plane_create_zpos_property(&plane->plane, 1, 1,
412 vsp->num_planes - 1);
413 }
414 }
415
416 return 0;
417 }
418