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
 36static 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
 51void 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
 91void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
 92{
 93	vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
 94}
 95
 96void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
 97{
 98	vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
 99}
100
101void 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
114static 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
142static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
143{
144	struct rcar_du_vsp_plane_state *state =
145		to_rcar_vsp_plane_state(plane->plane.state);
146	struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
147	struct drm_framebuffer *fb = plane->plane.state->fb;
148	const struct rcar_du_format_info *format;
149	struct vsp1_du_atomic_config cfg = {
150		.pixelformat = 0,
151		.pitch = fb->pitches[0],
152		.alpha = state->state.alpha >> 8,
153		.zpos = state->state.zpos,
154	};
155	u32 fourcc = state->format->fourcc;
156	unsigned int i;
157
158	cfg.src.left = state->state.src.x1 >> 16;
159	cfg.src.top = state->state.src.y1 >> 16;
160	cfg.src.width = drm_rect_width(&state->state.src) >> 16;
161	cfg.src.height = drm_rect_height(&state->state.src) >> 16;
162
163	cfg.dst.left = state->state.dst.x1;
164	cfg.dst.top = state->state.dst.y1;
165	cfg.dst.width = drm_rect_width(&state->state.dst);
166	cfg.dst.height = drm_rect_height(&state->state.dst);
167
168	for (i = 0; i < state->format->planes; ++i)
169		cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
170			   + fb->offsets[i];
171
172	if (state->state.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
173		switch (fourcc) {
174		case DRM_FORMAT_ARGB1555:
175			fourcc = DRM_FORMAT_XRGB1555;
176			break;
177
178		case DRM_FORMAT_ARGB4444:
179			fourcc = DRM_FORMAT_XRGB4444;
180			break;
181
182		case DRM_FORMAT_ARGB8888:
183			fourcc = DRM_FORMAT_XRGB8888;
184			break;
185		}
186	}
187
188	format = rcar_du_format_info(fourcc);
189	cfg.pixelformat = format->v4l2;
190
191	cfg.premult = state->state.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI;
192
193	vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
194			      plane->index, &cfg);
195}
196
197int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
198		       struct sg_table sg_tables[3])
199{
200	struct rcar_du_device *rcdu = vsp->dev;
201	unsigned int i, j;
202	int ret;
203
204	for (i = 0; i < fb->format->num_planes; ++i) {
205		struct drm_gem_dma_object *gem = drm_fb_dma_get_gem_obj(fb, i);
206		struct sg_table *sgt = &sg_tables[i];
207
208		if (gem->sgt) {
209			struct scatterlist *src;
210			struct scatterlist *dst;
211
212			/*
213			 * If the GEM buffer has a scatter gather table, it has
214			 * been imported from a dma-buf and has no physical
215			 * address as it might not be physically contiguous.
216			 * Copy the original scatter gather table to map it to
217			 * the VSP.
218			 */
219			ret = sg_alloc_table(sgt, gem->sgt->orig_nents,
220					     GFP_KERNEL);
221			if (ret)
222				goto fail;
223
224			src = gem->sgt->sgl;
225			dst = sgt->sgl;
226			for (j = 0; j < gem->sgt->orig_nents; ++j) {
227				sg_set_page(dst, sg_page(src), src->length,
228					    src->offset);
229				src = sg_next(src);
230				dst = sg_next(dst);
231			}
232		} else {
233			ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr,
234					      gem->dma_addr, gem->base.size);
235			if (ret)
236				goto fail;
237		}
238
239		ret = vsp1_du_map_sg(vsp->vsp, sgt);
240		if (ret) {
241			sg_free_table(sgt);
242			goto fail;
243		}
244	}
245
246	return 0;
247
248fail:
249	while (i--) {
250		struct sg_table *sgt = &sg_tables[i];
251
252		vsp1_du_unmap_sg(vsp->vsp, sgt);
253		sg_free_table(sgt);
254	}
255
256	return ret;
257}
258
259static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
260					struct drm_plane_state *state)
261{
262	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
263	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
264	int ret;
265
266	/*
267	 * There's no need to prepare (and unprepare) the framebuffer when the
268	 * plane is not visible, as it will not be displayed.
269	 */
270	if (!state->visible)
271		return 0;
272
273	ret = rcar_du_vsp_map_fb(vsp, state->fb, rstate->sg_tables);
274	if (ret < 0)
275		return ret;
276
277	return drm_gem_plane_helper_prepare_fb(plane, state);
278}
279
280void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
281			  struct sg_table sg_tables[3])
282{
283	unsigned int i;
284
285	for (i = 0; i < fb->format->num_planes; ++i) {
286		struct sg_table *sgt = &sg_tables[i];
287
288		vsp1_du_unmap_sg(vsp->vsp, sgt);
289		sg_free_table(sgt);
290	}
291}
292
293static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
294					 struct drm_plane_state *state)
295{
296	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
297	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
298
299	if (!state->visible)
300		return;
301
302	rcar_du_vsp_unmap_fb(vsp, state->fb, rstate->sg_tables);
303}
304
305static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
306					  struct drm_atomic_state *state)
307{
308	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
309										 plane);
310	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(new_plane_state);
311
312	return __rcar_du_plane_atomic_check(plane, new_plane_state,
313					    &rstate->format);
314}
315
316static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
317					struct drm_atomic_state *state)
318{
319	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
320	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
321	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
322	struct rcar_du_crtc *crtc = to_rcar_crtc(old_state->crtc);
323
324	if (new_state->visible)
325		rcar_du_vsp_plane_setup(rplane);
326	else if (old_state->crtc)
327		vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
328				      rplane->index, NULL);
329}
330
331static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
332	.prepare_fb = rcar_du_vsp_plane_prepare_fb,
333	.cleanup_fb = rcar_du_vsp_plane_cleanup_fb,
334	.atomic_check = rcar_du_vsp_plane_atomic_check,
335	.atomic_update = rcar_du_vsp_plane_atomic_update,
336};
337
338static struct drm_plane_state *
339rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
340{
341	struct rcar_du_vsp_plane_state *copy;
342
343	if (WARN_ON(!plane->state))
344		return NULL;
345
346	copy = kzalloc(sizeof(*copy), GFP_KERNEL);
347	if (copy == NULL)
348		return NULL;
349
350	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
351
352	return &copy->state;
353}
354
355static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
356						   struct drm_plane_state *state)
357{
358	__drm_atomic_helper_plane_destroy_state(state);
359	kfree(to_rcar_vsp_plane_state(state));
360}
361
362static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
363{
364	struct rcar_du_vsp_plane_state *state;
365
366	if (plane->state) {
367		rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
368		plane->state = NULL;
369	}
370
371	state = kzalloc(sizeof(*state), GFP_KERNEL);
372	if (state == NULL)
373		return;
374
375	__drm_atomic_helper_plane_reset(plane, &state->state);
376}
377
378static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
379	.update_plane = drm_atomic_helper_update_plane,
380	.disable_plane = drm_atomic_helper_disable_plane,
381	.reset = rcar_du_vsp_plane_reset,
382	.destroy = drm_plane_cleanup,
383	.atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
384	.atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
385};
386
387static void rcar_du_vsp_cleanup(struct drm_device *dev, void *res)
388{
389	struct rcar_du_vsp *vsp = res;
390	unsigned int i;
391
392	for (i = 0; i < vsp->num_planes; ++i) {
393		struct rcar_du_vsp_plane *plane = &vsp->planes[i];
394
395		drm_plane_cleanup(&plane->plane);
396	}
397
398	kfree(vsp->planes);
399
400	put_device(vsp->vsp);
401}
402
403int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
404		     unsigned int crtcs)
405{
406	struct rcar_du_device *rcdu = vsp->dev;
407	struct platform_device *pdev;
408	unsigned int num_crtcs = hweight32(crtcs);
409	unsigned int num_planes;
410	unsigned int i;
411	int ret;
412
413	/* Find the VSP device and initialize it. */
414	pdev = of_find_device_by_node(np);
415	if (!pdev)
416		return -ENXIO;
417
418	vsp->vsp = &pdev->dev;
419
420	ret = drmm_add_action_or_reset(&rcdu->ddev, rcar_du_vsp_cleanup, vsp);
421	if (ret < 0)
422		return ret;
423
424	ret = vsp1_du_init(vsp->vsp);
425	if (ret < 0)
426		return ret;
427
428	num_planes = rcdu->info->num_rpf;
429
430	vsp->planes = kcalloc(num_planes, sizeof(*vsp->planes), GFP_KERNEL);
431	if (!vsp->planes)
432		return -ENOMEM;
433
434	for (i = 0; i < num_planes; ++i) {
435		enum drm_plane_type type = i < num_crtcs
436					 ? DRM_PLANE_TYPE_PRIMARY
437					 : DRM_PLANE_TYPE_OVERLAY;
438		struct rcar_du_vsp_plane *plane = &vsp->planes[i];
439
440		plane->vsp = vsp;
441		plane->index = i;
442
443		ret = drm_universal_plane_init(&rcdu->ddev, &plane->plane,
444					       crtcs, &rcar_du_vsp_plane_funcs,
445					       rcar_du_vsp_formats,
446					       ARRAY_SIZE(rcar_du_vsp_formats),
447					       NULL, type, NULL);
448		if (ret < 0)
449			return ret;
450
451		drm_plane_helper_add(&plane->plane,
452				     &rcar_du_vsp_plane_helper_funcs);
453
454		drm_plane_create_alpha_property(&plane->plane);
455		drm_plane_create_zpos_property(&plane->plane, i, 0,
456					       num_planes - 1);
457
458		drm_plane_create_blend_mode_property(&plane->plane,
459					BIT(DRM_MODE_BLEND_PIXEL_NONE) |
460					BIT(DRM_MODE_BLEND_PREMULTI) |
461					BIT(DRM_MODE_BLEND_COVERAGE));
462
463		vsp->num_planes++;
464	}
465
466	return 0;
467}