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_plane_helper.h>
 21
 22#include <linux/of_platform.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
 31void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 32{
 33	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
 34	struct rcar_du_device *rcdu = crtc->group->dev;
 35	struct rcar_du_plane_state state = {
 36		.state = {
 37			.crtc = &crtc->crtc,
 38			.crtc_x = 0,
 39			.crtc_y = 0,
 40			.crtc_w = mode->hdisplay,
 41			.crtc_h = mode->vdisplay,
 42			.src_x = 0,
 43			.src_y = 0,
 44			.src_w = mode->hdisplay << 16,
 45			.src_h = mode->vdisplay << 16,
 46		},
 47		.format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
 48		.source = RCAR_DU_PLANE_VSPD1,
 49		.alpha = 255,
 50		.colorkey = 0,
 51		.zpos = 0,
 52	};
 53
 54	if (rcdu->info->gen >= 3)
 55		state.hwindex = (crtc->index % 2) ? 2 : 0;
 56	else
 57		state.hwindex = crtc->index % 2;
 58
 59	__rcar_du_plane_setup(crtc->group, &state);
 60
 61	/* Ensure that the plane source configuration takes effect by requesting
 62	 * a restart of the group. See rcar_du_plane_atomic_update() for a more
 63	 * detailed explanation.
 64	 *
 65	 * TODO: Check whether this is still needed on Gen3.
 66	 */
 67	crtc->group->need_restart = true;
 68
 69	vsp1_du_setup_lif(crtc->vsp->vsp, mode->hdisplay, mode->vdisplay);
 70}
 71
 72void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
 73{
 74	vsp1_du_setup_lif(crtc->vsp->vsp, 0, 0);
 75}
 76
 77void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
 78{
 79	vsp1_du_atomic_begin(crtc->vsp->vsp);
 80}
 81
 82void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
 83{
 84	vsp1_du_atomic_flush(crtc->vsp->vsp);
 85}
 86
 87/* Keep the two tables in sync. */
 88static const u32 formats_kms[] = {
 89	DRM_FORMAT_RGB332,
 90	DRM_FORMAT_ARGB4444,
 91	DRM_FORMAT_XRGB4444,
 92	DRM_FORMAT_ARGB1555,
 93	DRM_FORMAT_XRGB1555,
 94	DRM_FORMAT_RGB565,
 95	DRM_FORMAT_BGR888,
 96	DRM_FORMAT_RGB888,
 97	DRM_FORMAT_BGRA8888,
 98	DRM_FORMAT_BGRX8888,
 99	DRM_FORMAT_ARGB8888,
100	DRM_FORMAT_XRGB8888,
101	DRM_FORMAT_UYVY,
102	DRM_FORMAT_VYUY,
103	DRM_FORMAT_YUYV,
104	DRM_FORMAT_YVYU,
105	DRM_FORMAT_NV12,
106	DRM_FORMAT_NV21,
107	DRM_FORMAT_NV16,
108	DRM_FORMAT_NV61,
109	DRM_FORMAT_YUV420,
110	DRM_FORMAT_YVU420,
111	DRM_FORMAT_YUV422,
112	DRM_FORMAT_YVU422,
113	DRM_FORMAT_YUV444,
114	DRM_FORMAT_YVU444,
115};
116
117static const u32 formats_v4l2[] = {
118	V4L2_PIX_FMT_RGB332,
119	V4L2_PIX_FMT_ARGB444,
120	V4L2_PIX_FMT_XRGB444,
121	V4L2_PIX_FMT_ARGB555,
122	V4L2_PIX_FMT_XRGB555,
123	V4L2_PIX_FMT_RGB565,
124	V4L2_PIX_FMT_RGB24,
125	V4L2_PIX_FMT_BGR24,
126	V4L2_PIX_FMT_ARGB32,
127	V4L2_PIX_FMT_XRGB32,
128	V4L2_PIX_FMT_ABGR32,
129	V4L2_PIX_FMT_XBGR32,
130	V4L2_PIX_FMT_UYVY,
131	V4L2_PIX_FMT_VYUY,
132	V4L2_PIX_FMT_YUYV,
133	V4L2_PIX_FMT_YVYU,
134	V4L2_PIX_FMT_NV12M,
135	V4L2_PIX_FMT_NV21M,
136	V4L2_PIX_FMT_NV16M,
137	V4L2_PIX_FMT_NV61M,
138	V4L2_PIX_FMT_YUV420M,
139	V4L2_PIX_FMT_YVU420M,
140	V4L2_PIX_FMT_YUV422M,
141	V4L2_PIX_FMT_YVU422M,
142	V4L2_PIX_FMT_YUV444M,
143	V4L2_PIX_FMT_YVU444M,
144};
145
146static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
147{
148	struct rcar_du_vsp_plane_state *state =
149		to_rcar_vsp_plane_state(plane->plane.state);
150	struct drm_framebuffer *fb = plane->plane.state->fb;
151	struct v4l2_rect src;
152	struct v4l2_rect dst;
153	dma_addr_t paddr[2] = { 0, };
154	u32 pixelformat = 0;
155	unsigned int i;
156
157	src.left = state->state.src_x >> 16;
158	src.top = state->state.src_y >> 16;
159	src.width = state->state.src_w >> 16;
160	src.height = state->state.src_h >> 16;
161
162	dst.left = state->state.crtc_x;
163	dst.top = state->state.crtc_y;
164	dst.width = state->state.crtc_w;
165	dst.height = state->state.crtc_h;
166
167	for (i = 0; i < state->format->planes; ++i) {
168		struct drm_gem_cma_object *gem;
169
170		gem = drm_fb_cma_get_gem_obj(fb, i);
171		paddr[i] = gem->paddr + fb->offsets[i];
172	}
173
174	for (i = 0; i < ARRAY_SIZE(formats_kms); ++i) {
175		if (formats_kms[i] == state->format->fourcc) {
176			pixelformat = formats_v4l2[i];
177			break;
178		}
179	}
180
181	WARN_ON(!pixelformat);
182
183	vsp1_du_atomic_update(plane->vsp->vsp, plane->index, pixelformat,
184			      fb->pitches[0], paddr, &src, &dst);
185}
186
187static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
188					  struct drm_plane_state *state)
189{
190	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
191	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
192	struct rcar_du_device *rcdu = rplane->vsp->dev;
193
194	if (!state->fb || !state->crtc) {
195		rstate->format = NULL;
196		return 0;
197	}
198
199	if (state->src_w >> 16 != state->crtc_w ||
200	    state->src_h >> 16 != state->crtc_h) {
201		dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
202		return -EINVAL;
203	}
204
205	rstate->format = rcar_du_format_info(state->fb->pixel_format);
206	if (rstate->format == NULL) {
207		dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
208			state->fb->pixel_format);
209		return -EINVAL;
210	}
211
212	return 0;
213}
214
215static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
216					struct drm_plane_state *old_state)
217{
218	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
219
220	if (plane->state->crtc)
221		rcar_du_vsp_plane_setup(rplane);
222	else
223		vsp1_du_atomic_update(rplane->vsp->vsp, rplane->index, 0, 0, 0,
224				      NULL, NULL);
225}
226
227static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
228	.atomic_check = rcar_du_vsp_plane_atomic_check,
229	.atomic_update = rcar_du_vsp_plane_atomic_update,
230};
231
232static struct drm_plane_state *
233rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
234{
235	struct rcar_du_vsp_plane_state *state;
236	struct rcar_du_vsp_plane_state *copy;
237
238	if (WARN_ON(!plane->state))
239		return NULL;
240
241	state = to_rcar_vsp_plane_state(plane->state);
242	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
243	if (copy == NULL)
244		return NULL;
245
246	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
247
248	return &copy->state;
249}
250
251static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
252						   struct drm_plane_state *state)
253{
254	__drm_atomic_helper_plane_destroy_state(plane, state);
255	kfree(to_rcar_vsp_plane_state(state));
256}
257
258static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
259{
260	struct rcar_du_vsp_plane_state *state;
261
262	if (plane->state) {
263		rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
264		plane->state = NULL;
265	}
266
267	state = kzalloc(sizeof(*state), GFP_KERNEL);
268	if (state == NULL)
269		return;
270
271	state->alpha = 255;
272
273	plane->state = &state->state;
274	plane->state->plane = plane;
275}
276
277static int rcar_du_vsp_plane_atomic_set_property(struct drm_plane *plane,
278	struct drm_plane_state *state, struct drm_property *property,
279	uint64_t val)
280{
281	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
282	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;
283
284	if (property == rcdu->props.alpha)
285		rstate->alpha = val;
286	else
287		return -EINVAL;
288
289	return 0;
290}
291
292static int rcar_du_vsp_plane_atomic_get_property(struct drm_plane *plane,
293	const struct drm_plane_state *state, struct drm_property *property,
294	uint64_t *val)
295{
296	const struct rcar_du_vsp_plane_state *rstate =
297		container_of(state, const struct rcar_du_vsp_plane_state, state);
298	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;
299
300	if (property == rcdu->props.alpha)
301		*val = rstate->alpha;
302	else
303		return -EINVAL;
304
305	return 0;
306}
307
308static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
309	.update_plane = drm_atomic_helper_update_plane,
310	.disable_plane = drm_atomic_helper_disable_plane,
311	.reset = rcar_du_vsp_plane_reset,
312	.set_property = drm_atomic_helper_plane_set_property,
313	.destroy = drm_plane_cleanup,
314	.atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
315	.atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
316	.atomic_set_property = rcar_du_vsp_plane_atomic_set_property,
317	.atomic_get_property = rcar_du_vsp_plane_atomic_get_property,
318};
319
320int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
321{
322	struct rcar_du_device *rcdu = vsp->dev;
323	struct platform_device *pdev;
324	struct device_node *np;
325	unsigned int i;
326	int ret;
327
328	/* Find the VSP device and initialize it. */
329	np = of_parse_phandle(rcdu->dev->of_node, "vsps", vsp->index);
330	if (!np) {
331		dev_err(rcdu->dev, "vsps node not found\n");
332		return -ENXIO;
333	}
334
335	pdev = of_find_device_by_node(np);
336	of_node_put(np);
337	if (!pdev)
338		return -ENXIO;
339
340	vsp->vsp = &pdev->dev;
341
342	ret = vsp1_du_init(vsp->vsp);
343	if (ret < 0)
344		return ret;
345
346	 /* The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
347	  * 4 RPFs.
348	  */
349	vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;
350
351	vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
352				   sizeof(*vsp->planes), GFP_KERNEL);
353	if (!vsp->planes)
354		return -ENOMEM;
355
356	for (i = 0; i < vsp->num_planes; ++i) {
357		enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY
358					 : DRM_PLANE_TYPE_PRIMARY;
359		struct rcar_du_vsp_plane *plane = &vsp->planes[i];
360
361		plane->vsp = vsp;
362		plane->index = i;
363
364		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane,
365					       1 << vsp->index,
366					       &rcar_du_vsp_plane_funcs,
367					       formats_kms,
368					       ARRAY_SIZE(formats_kms), type,
369					       NULL);
370		if (ret < 0)
371			return ret;
372
373		drm_plane_helper_add(&plane->plane,
374				     &rcar_du_vsp_plane_helper_funcs);
375
376		if (type == DRM_PLANE_TYPE_PRIMARY)
377			continue;
378
379		drm_object_attach_property(&plane->plane.base,
380					   rcdu->props.alpha, 255);
381	}
382
383	return 0;
384}