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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, &copy->state);
307 
308 	return &copy->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