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_plane_helper.h>
 17#include <drm/drm_vblank.h>
 18
 19#include <linux/bitops.h>
 20#include <linux/dma-mapping.h>
 21#include <linux/of_platform.h>
 22#include <linux/scatterlist.h>
 23#include <linux/videodev2.h>
 24
 25#include <media/vsp1.h>
 26
 27#include "rcar_du_drv.h"
 28#include "rcar_du_kms.h"
 29#include "rcar_du_vsp.h"
 30#include "rcar_du_writeback.h"
 31
 32static void rcar_du_vsp_complete(void *private, unsigned int status, u32 crc)
 33{
 34	struct rcar_du_crtc *crtc = private;
 35
 36	if (crtc->vblank_enable)
 37		drm_crtc_handle_vblank(&crtc->crtc);
 38
 39	if (status & VSP1_DU_STATUS_COMPLETE)
 40		rcar_du_crtc_finish_page_flip(crtc);
 41	if (status & VSP1_DU_STATUS_WRITEBACK)
 42		rcar_du_writeback_complete(crtc);
 43
 44	drm_crtc_add_crc_entry(&crtc->crtc, false, 0, &crc);
 45}
 46
 47void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 48{
 49	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
 50	struct rcar_du_device *rcdu = crtc->dev;
 51	struct vsp1_du_lif_config cfg = {
 52		.width = mode->hdisplay,
 53		.height = mode->vdisplay,
 54		.interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE,
 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
 96void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
 97{
 98	vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
 99}
100
101void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
102{
103	vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
104}
105
106void 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	rcar_du_writeback_setup(crtc, &cfg.writeback);
115
116	vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
117}
118
119static const u32 rcar_du_vsp_formats[] = {
120	DRM_FORMAT_RGB332,
121	DRM_FORMAT_ARGB4444,
122	DRM_FORMAT_XRGB4444,
123	DRM_FORMAT_ARGB1555,
124	DRM_FORMAT_XRGB1555,
125	DRM_FORMAT_RGB565,
126	DRM_FORMAT_BGR888,
127	DRM_FORMAT_RGB888,
128	DRM_FORMAT_BGRA8888,
129	DRM_FORMAT_BGRX8888,
130	DRM_FORMAT_ARGB8888,
131	DRM_FORMAT_XRGB8888,
132	DRM_FORMAT_UYVY,
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
147static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
148{
149	struct rcar_du_vsp_plane_state *state =
150		to_rcar_vsp_plane_state(plane->plane.state);
151	struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
152	struct drm_framebuffer *fb = plane->plane.state->fb;
153	const struct rcar_du_format_info *format;
154	struct vsp1_du_atomic_config cfg = {
155		.pixelformat = 0,
156		.pitch = fb->pitches[0],
157		.alpha = state->state.alpha >> 8,
158		.zpos = state->state.zpos,
159	};
160	unsigned int i;
161
162	cfg.src.left = state->state.src.x1 >> 16;
163	cfg.src.top = state->state.src.y1 >> 16;
164	cfg.src.width = drm_rect_width(&state->state.src) >> 16;
165	cfg.src.height = drm_rect_height(&state->state.src) >> 16;
166
167	cfg.dst.left = state->state.dst.x1;
168	cfg.dst.top = state->state.dst.y1;
169	cfg.dst.width = drm_rect_width(&state->state.dst);
170	cfg.dst.height = drm_rect_height(&state->state.dst);
171
172	for (i = 0; i < state->format->planes; ++i)
173		cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
174			   + fb->offsets[i];
175
176	format = rcar_du_format_info(state->format->fourcc);
177	cfg.pixelformat = format->v4l2;
178
179	vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
180			      plane->index, &cfg);
181}
182
183int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
184		       struct sg_table sg_tables[3])
185{
186	struct rcar_du_device *rcdu = vsp->dev;
187	unsigned int i;
188	int ret;
189
190	for (i = 0; i < fb->format->num_planes; ++i) {
191		struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, i);
192		struct sg_table *sgt = &sg_tables[i];
193
194		ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr, gem->paddr,
195				      gem->base.size);
196		if (ret)
197			goto fail;
198
199		ret = vsp1_du_map_sg(vsp->vsp, sgt);
200		if (!ret) {
201			sg_free_table(sgt);
202			ret = -ENOMEM;
203			goto fail;
204		}
205	}
206
207	return 0;
208
209fail:
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
220static 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
241void 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
254static 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
266static 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
274static 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
283		vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
284				      rplane->index, NULL);
285}
286
287static 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
294static struct drm_plane_state *
295rcar_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
311static 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
318static 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
335static 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
344int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
345		     unsigned int crtcs)
346{
347	struct rcar_du_device *rcdu = vsp->dev;
348	struct platform_device *pdev;
349	unsigned int num_crtcs = hweight32(crtcs);
350	unsigned int i;
351	int ret;
352
353	/* Find the VSP device and initialize it. */
354	pdev = of_find_device_by_node(np);
355	if (!pdev)
356		return -ENXIO;
357
358	vsp->vsp = &pdev->dev;
359
360	ret = vsp1_du_init(vsp->vsp);
361	if (ret < 0)
362		return ret;
363
364	 /*
365	  * The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
366	  * 4 RPFs.
367	  */
368	vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;
369
370	vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
371				   sizeof(*vsp->planes), GFP_KERNEL);
372	if (!vsp->planes)
373		return -ENOMEM;
374
375	for (i = 0; i < vsp->num_planes; ++i) {
376		enum drm_plane_type type = i < num_crtcs
377					 ? DRM_PLANE_TYPE_PRIMARY
378					 : DRM_PLANE_TYPE_OVERLAY;
379		struct rcar_du_vsp_plane *plane = &vsp->planes[i];
380
381		plane->vsp = vsp;
382		plane->index = i;
383
384		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
385					       &rcar_du_vsp_plane_funcs,
386					       rcar_du_vsp_formats,
387					       ARRAY_SIZE(rcar_du_vsp_formats),
388					       NULL, type, NULL);
389		if (ret < 0)
390			return ret;
391
392		drm_plane_helper_add(&plane->plane,
393				     &rcar_du_vsp_plane_helper_funcs);
394
395		if (type == DRM_PLANE_TYPE_PRIMARY)
396			continue;
397
398		drm_plane_create_alpha_property(&plane->plane);
399		drm_plane_create_zpos_property(&plane->plane, 1, 1,
400					       vsp->num_planes - 1);
401	}
402
403	return 0;
404}