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1 /*
2  * vsp1_video.c  --  R-Car VSP1 Video Node
3  *
4  * Copyright (C) 2013-2014 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 <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/v4l2-mediabus.h>
20 #include <linux/videodev2.h>
21 
22 #include <media/media-entity.h>
23 #include <media/v4l2-dev.h>
24 #include <media/v4l2-fh.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-subdev.h>
27 #include <media/videobuf2-core.h>
28 #include <media/videobuf2-dma-contig.h>
29 
30 #include "vsp1.h"
31 #include "vsp1_bru.h"
32 #include "vsp1_entity.h"
33 #include "vsp1_rwpf.h"
34 #include "vsp1_uds.h"
35 #include "vsp1_video.h"
36 
37 #define VSP1_VIDEO_DEF_FORMAT		V4L2_PIX_FMT_YUYV
38 #define VSP1_VIDEO_DEF_WIDTH		1024
39 #define VSP1_VIDEO_DEF_HEIGHT		768
40 
41 #define VSP1_VIDEO_MIN_WIDTH		2U
42 #define VSP1_VIDEO_MAX_WIDTH		8190U
43 #define VSP1_VIDEO_MIN_HEIGHT		2U
44 #define VSP1_VIDEO_MAX_HEIGHT		8190U
45 
46 /* -----------------------------------------------------------------------------
47  * Helper functions
48  */
49 
50 static const struct vsp1_format_info vsp1_video_formats[] = {
51 	{ V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32,
52 	  VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
53 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
54 	  1, { 8, 0, 0 }, false, false, 1, 1, false },
55 	{ V4L2_PIX_FMT_ARGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
56 	  VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
57 	  VI6_RPF_DSWAP_P_WDS,
58 	  1, { 16, 0, 0 }, false, false, 1, 1, true },
59 	{ V4L2_PIX_FMT_XRGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
60 	  VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
61 	  VI6_RPF_DSWAP_P_WDS,
62 	  1, { 16, 0, 0 }, false, false, 1, 1, true },
63 	{ V4L2_PIX_FMT_ARGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
64 	  VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
65 	  VI6_RPF_DSWAP_P_WDS,
66 	  1, { 16, 0, 0 }, false, false, 1, 1, true },
67 	{ V4L2_PIX_FMT_XRGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
68 	  VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
69 	  VI6_RPF_DSWAP_P_WDS,
70 	  1, { 16, 0, 0 }, false, false, 1, 1, false },
71 	{ V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32,
72 	  VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
73 	  VI6_RPF_DSWAP_P_WDS,
74 	  1, { 16, 0, 0 }, false, false, 1, 1, false },
75 	{ V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32,
76 	  VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
77 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
78 	  1, { 24, 0, 0 }, false, false, 1, 1, false },
79 	{ V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32,
80 	  VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
81 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
82 	  1, { 24, 0, 0 }, false, false, 1, 1, false },
83 	{ V4L2_PIX_FMT_ABGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
84 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
85 	  1, { 32, 0, 0 }, false, false, 1, 1, true },
86 	{ V4L2_PIX_FMT_XBGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
87 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
88 	  1, { 32, 0, 0 }, false, false, 1, 1, false },
89 	{ V4L2_PIX_FMT_ARGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
90 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
91 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
92 	  1, { 32, 0, 0 }, false, false, 1, 1, true },
93 	{ V4L2_PIX_FMT_XRGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
94 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
95 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
96 	  1, { 32, 0, 0 }, false, false, 1, 1, false },
97 	{ V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32,
98 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
99 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
100 	  1, { 16, 0, 0 }, false, false, 2, 1, false },
101 	{ V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32,
102 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
103 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
104 	  1, { 16, 0, 0 }, false, true, 2, 1, false },
105 	{ V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32,
106 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
107 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
108 	  1, { 16, 0, 0 }, true, false, 2, 1, false },
109 	{ V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32,
110 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
111 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
112 	  1, { 16, 0, 0 }, true, true, 2, 1, false },
113 	{ V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32,
114 	  VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
115 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
116 	  2, { 8, 16, 0 }, false, false, 2, 2, false },
117 	{ V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32,
118 	  VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
119 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
120 	  2, { 8, 16, 0 }, false, true, 2, 2, false },
121 	{ V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32,
122 	  VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
123 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
124 	  2, { 8, 16, 0 }, false, false, 2, 1, false },
125 	{ V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32,
126 	  VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
127 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
128 	  2, { 8, 16, 0 }, false, true, 2, 1, false },
129 	{ V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32,
130 	  VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
131 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
132 	  3, { 8, 8, 8 }, false, false, 2, 2, false },
133 };
134 
135 /*
136  * vsp1_get_format_info - Retrieve format information for a 4CC
137  * @fourcc: the format 4CC
138  *
139  * Return a pointer to the format information structure corresponding to the
140  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
141  */
vsp1_get_format_info(u32 fourcc)142 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
143 {
144 	unsigned int i;
145 
146 	for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
147 		const struct vsp1_format_info *info = &vsp1_video_formats[i];
148 
149 		if (info->fourcc == fourcc)
150 			return info;
151 	}
152 
153 	return NULL;
154 }
155 
156 
157 static struct v4l2_subdev *
vsp1_video_remote_subdev(struct media_pad * local,u32 * pad)158 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
159 {
160 	struct media_pad *remote;
161 
162 	remote = media_entity_remote_pad(local);
163 	if (remote == NULL ||
164 	    media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
165 		return NULL;
166 
167 	if (pad)
168 		*pad = remote->index;
169 
170 	return media_entity_to_v4l2_subdev(remote->entity);
171 }
172 
vsp1_video_verify_format(struct vsp1_video * video)173 static int vsp1_video_verify_format(struct vsp1_video *video)
174 {
175 	struct v4l2_subdev_format fmt;
176 	struct v4l2_subdev *subdev;
177 	int ret;
178 
179 	subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
180 	if (subdev == NULL)
181 		return -EINVAL;
182 
183 	fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
184 	ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
185 	if (ret < 0)
186 		return ret == -ENOIOCTLCMD ? -EINVAL : ret;
187 
188 	if (video->fmtinfo->mbus != fmt.format.code ||
189 	    video->format.height != fmt.format.height ||
190 	    video->format.width != fmt.format.width)
191 		return -EINVAL;
192 
193 	return 0;
194 }
195 
__vsp1_video_try_format(struct vsp1_video * video,struct v4l2_pix_format_mplane * pix,const struct vsp1_format_info ** fmtinfo)196 static int __vsp1_video_try_format(struct vsp1_video *video,
197 				   struct v4l2_pix_format_mplane *pix,
198 				   const struct vsp1_format_info **fmtinfo)
199 {
200 	static const u32 xrgb_formats[][2] = {
201 		{ V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
202 		{ V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
203 		{ V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
204 		{ V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
205 	};
206 
207 	const struct vsp1_format_info *info;
208 	unsigned int width = pix->width;
209 	unsigned int height = pix->height;
210 	unsigned int i;
211 
212 	/* Backward compatibility: replace deprecated RGB formats by their XRGB
213 	 * equivalent. This selects the format older userspace applications want
214 	 * while still exposing the new format.
215 	 */
216 	for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
217 		if (xrgb_formats[i][0] == pix->pixelformat) {
218 			pix->pixelformat = xrgb_formats[i][1];
219 			break;
220 		}
221 	}
222 
223 	/* Retrieve format information and select the default format if the
224 	 * requested format isn't supported.
225 	 */
226 	info = vsp1_get_format_info(pix->pixelformat);
227 	if (info == NULL)
228 		info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
229 
230 	pix->pixelformat = info->fourcc;
231 	pix->colorspace = V4L2_COLORSPACE_SRGB;
232 	pix->field = V4L2_FIELD_NONE;
233 	memset(pix->reserved, 0, sizeof(pix->reserved));
234 
235 	/* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
236 	width = round_down(width, info->hsub);
237 	height = round_down(height, info->vsub);
238 
239 	/* Clamp the width and height. */
240 	pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
241 	pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
242 			    VSP1_VIDEO_MAX_HEIGHT);
243 
244 	/* Compute and clamp the stride and image size. While not documented in
245 	 * the datasheet, strides not aligned to a multiple of 128 bytes result
246 	 * in image corruption.
247 	 */
248 	for (i = 0; i < max(info->planes, 2U); ++i) {
249 		unsigned int hsub = i > 0 ? info->hsub : 1;
250 		unsigned int vsub = i > 0 ? info->vsub : 1;
251 		unsigned int align = 128;
252 		unsigned int bpl;
253 
254 		bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
255 			      pix->width / hsub * info->bpp[i] / 8,
256 			      round_down(65535U, align));
257 
258 		pix->plane_fmt[i].bytesperline = round_up(bpl, align);
259 		pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
260 					    * pix->height / vsub;
261 	}
262 
263 	if (info->planes == 3) {
264 		/* The second and third planes must have the same stride. */
265 		pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
266 		pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
267 	}
268 
269 	pix->num_planes = info->planes;
270 
271 	if (fmtinfo)
272 		*fmtinfo = info;
273 
274 	return 0;
275 }
276 
277 static bool
vsp1_video_format_adjust(struct vsp1_video * video,const struct v4l2_pix_format_mplane * format,struct v4l2_pix_format_mplane * adjust)278 vsp1_video_format_adjust(struct vsp1_video *video,
279 			 const struct v4l2_pix_format_mplane *format,
280 			 struct v4l2_pix_format_mplane *adjust)
281 {
282 	unsigned int i;
283 
284 	*adjust = *format;
285 	__vsp1_video_try_format(video, adjust, NULL);
286 
287 	if (format->width != adjust->width ||
288 	    format->height != adjust->height ||
289 	    format->pixelformat != adjust->pixelformat ||
290 	    format->num_planes != adjust->num_planes)
291 		return false;
292 
293 	for (i = 0; i < format->num_planes; ++i) {
294 		if (format->plane_fmt[i].bytesperline !=
295 		    adjust->plane_fmt[i].bytesperline)
296 			return false;
297 
298 		adjust->plane_fmt[i].sizeimage =
299 			max(adjust->plane_fmt[i].sizeimage,
300 			    format->plane_fmt[i].sizeimage);
301 	}
302 
303 	return true;
304 }
305 
306 /* -----------------------------------------------------------------------------
307  * Pipeline Management
308  */
309 
vsp1_pipeline_validate_branch(struct vsp1_pipeline * pipe,struct vsp1_rwpf * input,struct vsp1_rwpf * output)310 static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
311 					 struct vsp1_rwpf *input,
312 					 struct vsp1_rwpf *output)
313 {
314 	struct vsp1_entity *entity;
315 	unsigned int entities = 0;
316 	struct media_pad *pad;
317 	bool bru_found = false;
318 
319 	input->location.left = 0;
320 	input->location.top = 0;
321 
322 	pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
323 
324 	while (1) {
325 		if (pad == NULL)
326 			return -EPIPE;
327 
328 		/* We've reached a video node, that shouldn't have happened. */
329 		if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
330 			return -EPIPE;
331 
332 		entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
333 
334 		/* A BRU is present in the pipeline, store the compose rectangle
335 		 * location in the input RPF for use when configuring the RPF.
336 		 */
337 		if (entity->type == VSP1_ENTITY_BRU) {
338 			struct vsp1_bru *bru = to_bru(&entity->subdev);
339 			struct v4l2_rect *rect =
340 				&bru->inputs[pad->index].compose;
341 
342 			bru->inputs[pad->index].rpf = input;
343 
344 			input->location.left = rect->left;
345 			input->location.top = rect->top;
346 
347 			bru_found = true;
348 		}
349 
350 		/* We've reached the WPF, we're done. */
351 		if (entity->type == VSP1_ENTITY_WPF)
352 			break;
353 
354 		/* Ensure the branch has no loop. */
355 		if (entities & (1 << entity->subdev.entity.id))
356 			return -EPIPE;
357 
358 		entities |= 1 << entity->subdev.entity.id;
359 
360 		/* UDS can't be chained. */
361 		if (entity->type == VSP1_ENTITY_UDS) {
362 			if (pipe->uds)
363 				return -EPIPE;
364 
365 			pipe->uds = entity;
366 			pipe->uds_input = bru_found ? pipe->bru
367 					: &input->entity;
368 		}
369 
370 		/* Follow the source link. The link setup operations ensure
371 		 * that the output fan-out can't be more than one, there is thus
372 		 * no need to verify here that only a single source link is
373 		 * activated.
374 		 */
375 		pad = &entity->pads[entity->source_pad];
376 		pad = media_entity_remote_pad(pad);
377 	}
378 
379 	/* The last entity must be the output WPF. */
380 	if (entity != &output->entity)
381 		return -EPIPE;
382 
383 	return 0;
384 }
385 
__vsp1_pipeline_cleanup(struct vsp1_pipeline * pipe)386 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
387 {
388 	if (pipe->bru) {
389 		struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
390 		unsigned int i;
391 
392 		for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
393 			bru->inputs[i].rpf = NULL;
394 	}
395 
396 	INIT_LIST_HEAD(&pipe->entities);
397 	pipe->state = VSP1_PIPELINE_STOPPED;
398 	pipe->buffers_ready = 0;
399 	pipe->num_video = 0;
400 	pipe->num_inputs = 0;
401 	pipe->output = NULL;
402 	pipe->bru = NULL;
403 	pipe->lif = NULL;
404 	pipe->uds = NULL;
405 }
406 
vsp1_pipeline_validate(struct vsp1_pipeline * pipe,struct vsp1_video * video)407 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
408 				  struct vsp1_video *video)
409 {
410 	struct media_entity_graph graph;
411 	struct media_entity *entity = &video->video.entity;
412 	struct media_device *mdev = entity->parent;
413 	unsigned int i;
414 	int ret;
415 
416 	mutex_lock(&mdev->graph_mutex);
417 
418 	/* Walk the graph to locate the entities and video nodes. */
419 	media_entity_graph_walk_start(&graph, entity);
420 
421 	while ((entity = media_entity_graph_walk_next(&graph))) {
422 		struct v4l2_subdev *subdev;
423 		struct vsp1_rwpf *rwpf;
424 		struct vsp1_entity *e;
425 
426 		if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
427 			pipe->num_video++;
428 			continue;
429 		}
430 
431 		subdev = media_entity_to_v4l2_subdev(entity);
432 		e = to_vsp1_entity(subdev);
433 		list_add_tail(&e->list_pipe, &pipe->entities);
434 
435 		if (e->type == VSP1_ENTITY_RPF) {
436 			rwpf = to_rwpf(subdev);
437 			pipe->inputs[pipe->num_inputs++] = rwpf;
438 			rwpf->video.pipe_index = pipe->num_inputs;
439 		} else if (e->type == VSP1_ENTITY_WPF) {
440 			rwpf = to_rwpf(subdev);
441 			pipe->output = to_rwpf(subdev);
442 			rwpf->video.pipe_index = 0;
443 		} else if (e->type == VSP1_ENTITY_LIF) {
444 			pipe->lif = e;
445 		} else if (e->type == VSP1_ENTITY_BRU) {
446 			pipe->bru = e;
447 		}
448 	}
449 
450 	mutex_unlock(&mdev->graph_mutex);
451 
452 	/* We need one output and at least one input. */
453 	if (pipe->num_inputs == 0 || !pipe->output) {
454 		ret = -EPIPE;
455 		goto error;
456 	}
457 
458 	/* Follow links downstream for each input and make sure the graph
459 	 * contains no loop and that all branches end at the output WPF.
460 	 */
461 	for (i = 0; i < pipe->num_inputs; ++i) {
462 		ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
463 						    pipe->output);
464 		if (ret < 0)
465 			goto error;
466 	}
467 
468 	return 0;
469 
470 error:
471 	__vsp1_pipeline_cleanup(pipe);
472 	return ret;
473 }
474 
vsp1_pipeline_init(struct vsp1_pipeline * pipe,struct vsp1_video * video)475 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
476 			      struct vsp1_video *video)
477 {
478 	int ret;
479 
480 	mutex_lock(&pipe->lock);
481 
482 	/* If we're the first user validate and initialize the pipeline. */
483 	if (pipe->use_count == 0) {
484 		ret = vsp1_pipeline_validate(pipe, video);
485 		if (ret < 0)
486 			goto done;
487 	}
488 
489 	pipe->use_count++;
490 	ret = 0;
491 
492 done:
493 	mutex_unlock(&pipe->lock);
494 	return ret;
495 }
496 
vsp1_pipeline_cleanup(struct vsp1_pipeline * pipe)497 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
498 {
499 	mutex_lock(&pipe->lock);
500 
501 	/* If we're the last user clean up the pipeline. */
502 	if (--pipe->use_count == 0)
503 		__vsp1_pipeline_cleanup(pipe);
504 
505 	mutex_unlock(&pipe->lock);
506 }
507 
vsp1_pipeline_run(struct vsp1_pipeline * pipe)508 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
509 {
510 	struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
511 
512 	vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
513 	pipe->state = VSP1_PIPELINE_RUNNING;
514 	pipe->buffers_ready = 0;
515 }
516 
vsp1_pipeline_stop(struct vsp1_pipeline * pipe)517 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
518 {
519 	struct vsp1_entity *entity;
520 	unsigned long flags;
521 	int ret;
522 
523 	spin_lock_irqsave(&pipe->irqlock, flags);
524 	if (pipe->state == VSP1_PIPELINE_RUNNING)
525 		pipe->state = VSP1_PIPELINE_STOPPING;
526 	spin_unlock_irqrestore(&pipe->irqlock, flags);
527 
528 	ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
529 				 msecs_to_jiffies(500));
530 	ret = ret == 0 ? -ETIMEDOUT : 0;
531 
532 	list_for_each_entry(entity, &pipe->entities, list_pipe) {
533 		if (entity->route && entity->route->reg)
534 			vsp1_write(entity->vsp1, entity->route->reg,
535 				   VI6_DPR_NODE_UNUSED);
536 
537 		v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
538 	}
539 
540 	return ret;
541 }
542 
vsp1_pipeline_ready(struct vsp1_pipeline * pipe)543 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
544 {
545 	unsigned int mask;
546 
547 	mask = ((1 << pipe->num_inputs) - 1) << 1;
548 	if (!pipe->lif)
549 		mask |= 1 << 0;
550 
551 	return pipe->buffers_ready == mask;
552 }
553 
554 /*
555  * vsp1_video_complete_buffer - Complete the current buffer
556  * @video: the video node
557  *
558  * This function completes the current buffer by filling its sequence number,
559  * time stamp and payload size, and hands it back to the videobuf core.
560  *
561  * When operating in DU output mode (deep pipeline to the DU through the LIF),
562  * the VSP1 needs to constantly supply frames to the display. In that case, if
563  * no other buffer is queued, reuse the one that has just been processed instead
564  * of handing it back to the videobuf core.
565  *
566  * Return the next queued buffer or NULL if the queue is empty.
567  */
568 static struct vsp1_video_buffer *
vsp1_video_complete_buffer(struct vsp1_video * video)569 vsp1_video_complete_buffer(struct vsp1_video *video)
570 {
571 	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
572 	struct vsp1_video_buffer *next = NULL;
573 	struct vsp1_video_buffer *done;
574 	unsigned long flags;
575 	unsigned int i;
576 
577 	spin_lock_irqsave(&video->irqlock, flags);
578 
579 	if (list_empty(&video->irqqueue)) {
580 		spin_unlock_irqrestore(&video->irqlock, flags);
581 		return NULL;
582 	}
583 
584 	done = list_first_entry(&video->irqqueue,
585 				struct vsp1_video_buffer, queue);
586 
587 	/* In DU output mode reuse the buffer if the list is singular. */
588 	if (pipe->lif && list_is_singular(&video->irqqueue)) {
589 		spin_unlock_irqrestore(&video->irqlock, flags);
590 		return done;
591 	}
592 
593 	list_del(&done->queue);
594 
595 	if (!list_empty(&video->irqqueue))
596 		next = list_first_entry(&video->irqqueue,
597 					struct vsp1_video_buffer, queue);
598 
599 	spin_unlock_irqrestore(&video->irqlock, flags);
600 
601 	done->buf.v4l2_buf.sequence = video->sequence++;
602 	v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
603 	for (i = 0; i < done->buf.num_planes; ++i)
604 		vb2_set_plane_payload(&done->buf, i, done->length[i]);
605 	vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
606 
607 	return next;
608 }
609 
vsp1_video_frame_end(struct vsp1_pipeline * pipe,struct vsp1_video * video)610 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
611 				 struct vsp1_video *video)
612 {
613 	struct vsp1_video_buffer *buf;
614 	unsigned long flags;
615 
616 	buf = vsp1_video_complete_buffer(video);
617 	if (buf == NULL)
618 		return;
619 
620 	spin_lock_irqsave(&pipe->irqlock, flags);
621 
622 	video->ops->queue(video, buf);
623 	pipe->buffers_ready |= 1 << video->pipe_index;
624 
625 	spin_unlock_irqrestore(&pipe->irqlock, flags);
626 }
627 
vsp1_pipeline_frame_end(struct vsp1_pipeline * pipe)628 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
629 {
630 	enum vsp1_pipeline_state state;
631 	unsigned long flags;
632 	unsigned int i;
633 
634 	if (pipe == NULL)
635 		return;
636 
637 	/* Complete buffers on all video nodes. */
638 	for (i = 0; i < pipe->num_inputs; ++i)
639 		vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
640 
641 	if (!pipe->lif)
642 		vsp1_video_frame_end(pipe, &pipe->output->video);
643 
644 	spin_lock_irqsave(&pipe->irqlock, flags);
645 
646 	state = pipe->state;
647 	pipe->state = VSP1_PIPELINE_STOPPED;
648 
649 	/* If a stop has been requested, mark the pipeline as stopped and
650 	 * return.
651 	 */
652 	if (state == VSP1_PIPELINE_STOPPING) {
653 		wake_up(&pipe->wq);
654 		goto done;
655 	}
656 
657 	/* Restart the pipeline if ready. */
658 	if (vsp1_pipeline_ready(pipe))
659 		vsp1_pipeline_run(pipe);
660 
661 done:
662 	spin_unlock_irqrestore(&pipe->irqlock, flags);
663 }
664 
665 /*
666  * Propagate the alpha value through the pipeline.
667  *
668  * As the UDS has restricted scaling capabilities when the alpha component needs
669  * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
670  * value. The UDS then outputs a fixed alpha value which needs to be programmed
671  * from the input RPF alpha.
672  */
vsp1_pipeline_propagate_alpha(struct vsp1_pipeline * pipe,struct vsp1_entity * input,unsigned int alpha)673 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
674 				   struct vsp1_entity *input,
675 				   unsigned int alpha)
676 {
677 	struct vsp1_entity *entity;
678 	struct media_pad *pad;
679 
680 	pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
681 
682 	while (pad) {
683 		if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
684 			break;
685 
686 		entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
687 
688 		/* The BRU background color has a fixed alpha value set to 255,
689 		 * the output alpha value is thus always equal to 255.
690 		 */
691 		if (entity->type == VSP1_ENTITY_BRU)
692 			alpha = 255;
693 
694 		if (entity->type == VSP1_ENTITY_UDS) {
695 			struct vsp1_uds *uds = to_uds(&entity->subdev);
696 
697 			vsp1_uds_set_alpha(uds, alpha);
698 			break;
699 		}
700 
701 		pad = &entity->pads[entity->source_pad];
702 		pad = media_entity_remote_pad(pad);
703 	}
704 }
705 
706 /* -----------------------------------------------------------------------------
707  * videobuf2 Queue Operations
708  */
709 
710 static int
vsp1_video_queue_setup(struct vb2_queue * vq,const struct v4l2_format * fmt,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])711 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
712 		     unsigned int *nbuffers, unsigned int *nplanes,
713 		     unsigned int sizes[], void *alloc_ctxs[])
714 {
715 	struct vsp1_video *video = vb2_get_drv_priv(vq);
716 	const struct v4l2_pix_format_mplane *format;
717 	struct v4l2_pix_format_mplane pix_mp;
718 	unsigned int i;
719 
720 	if (fmt) {
721 		/* Make sure the format is valid and adjust the sizeimage field
722 		 * if needed.
723 		 */
724 		if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
725 			return -EINVAL;
726 
727 		format = &pix_mp;
728 	} else {
729 		format = &video->format;
730 	}
731 
732 	*nplanes = format->num_planes;
733 
734 	for (i = 0; i < format->num_planes; ++i) {
735 		sizes[i] = format->plane_fmt[i].sizeimage;
736 		alloc_ctxs[i] = video->alloc_ctx;
737 	}
738 
739 	return 0;
740 }
741 
vsp1_video_buffer_prepare(struct vb2_buffer * vb)742 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
743 {
744 	struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
745 	struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
746 	const struct v4l2_pix_format_mplane *format = &video->format;
747 	unsigned int i;
748 
749 	if (vb->num_planes < format->num_planes)
750 		return -EINVAL;
751 
752 	for (i = 0; i < vb->num_planes; ++i) {
753 		buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
754 		buf->length[i] = vb2_plane_size(vb, i);
755 
756 		if (buf->length[i] < format->plane_fmt[i].sizeimage)
757 			return -EINVAL;
758 	}
759 
760 	return 0;
761 }
762 
vsp1_video_buffer_queue(struct vb2_buffer * vb)763 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
764 {
765 	struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
766 	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
767 	struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
768 	unsigned long flags;
769 	bool empty;
770 
771 	spin_lock_irqsave(&video->irqlock, flags);
772 	empty = list_empty(&video->irqqueue);
773 	list_add_tail(&buf->queue, &video->irqqueue);
774 	spin_unlock_irqrestore(&video->irqlock, flags);
775 
776 	if (!empty)
777 		return;
778 
779 	spin_lock_irqsave(&pipe->irqlock, flags);
780 
781 	video->ops->queue(video, buf);
782 	pipe->buffers_ready |= 1 << video->pipe_index;
783 
784 	if (vb2_is_streaming(&video->queue) &&
785 	    vsp1_pipeline_ready(pipe))
786 		vsp1_pipeline_run(pipe);
787 
788 	spin_unlock_irqrestore(&pipe->irqlock, flags);
789 }
790 
vsp1_entity_route_setup(struct vsp1_entity * source)791 static void vsp1_entity_route_setup(struct vsp1_entity *source)
792 {
793 	struct vsp1_entity *sink;
794 
795 	if (source->route->reg == 0)
796 		return;
797 
798 	sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
799 	vsp1_write(source->vsp1, source->route->reg,
800 		   sink->route->inputs[source->sink_pad]);
801 }
802 
vsp1_video_start_streaming(struct vb2_queue * vq,unsigned int count)803 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
804 {
805 	struct vsp1_video *video = vb2_get_drv_priv(vq);
806 	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
807 	struct vsp1_entity *entity;
808 	unsigned long flags;
809 	int ret;
810 
811 	mutex_lock(&pipe->lock);
812 	if (pipe->stream_count == pipe->num_video - 1) {
813 		if (pipe->uds) {
814 			struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
815 
816 			/* If a BRU is present in the pipeline before the UDS,
817 			 * the alpha component doesn't need to be scaled as the
818 			 * BRU output alpha value is fixed to 255. Otherwise we
819 			 * need to scale the alpha component only when available
820 			 * at the input RPF.
821 			 */
822 			if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
823 				uds->scale_alpha = false;
824 			} else {
825 				struct vsp1_rwpf *rpf =
826 					to_rwpf(&pipe->uds_input->subdev);
827 
828 				uds->scale_alpha = rpf->video.fmtinfo->alpha;
829 			}
830 		}
831 
832 		list_for_each_entry(entity, &pipe->entities, list_pipe) {
833 			vsp1_entity_route_setup(entity);
834 
835 			ret = v4l2_subdev_call(&entity->subdev, video,
836 					       s_stream, 1);
837 			if (ret < 0) {
838 				mutex_unlock(&pipe->lock);
839 				return ret;
840 			}
841 		}
842 	}
843 
844 	pipe->stream_count++;
845 	mutex_unlock(&pipe->lock);
846 
847 	spin_lock_irqsave(&pipe->irqlock, flags);
848 	if (vsp1_pipeline_ready(pipe))
849 		vsp1_pipeline_run(pipe);
850 	spin_unlock_irqrestore(&pipe->irqlock, flags);
851 
852 	return 0;
853 }
854 
vsp1_video_stop_streaming(struct vb2_queue * vq)855 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
856 {
857 	struct vsp1_video *video = vb2_get_drv_priv(vq);
858 	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
859 	struct vsp1_video_buffer *buffer;
860 	unsigned long flags;
861 	int ret;
862 
863 	mutex_lock(&pipe->lock);
864 	if (--pipe->stream_count == 0) {
865 		/* Stop the pipeline. */
866 		ret = vsp1_pipeline_stop(pipe);
867 		if (ret == -ETIMEDOUT)
868 			dev_err(video->vsp1->dev, "pipeline stop timeout\n");
869 	}
870 	mutex_unlock(&pipe->lock);
871 
872 	vsp1_pipeline_cleanup(pipe);
873 	media_entity_pipeline_stop(&video->video.entity);
874 
875 	/* Remove all buffers from the IRQ queue. */
876 	spin_lock_irqsave(&video->irqlock, flags);
877 	list_for_each_entry(buffer, &video->irqqueue, queue)
878 		vb2_buffer_done(&buffer->buf, VB2_BUF_STATE_ERROR);
879 	INIT_LIST_HEAD(&video->irqqueue);
880 	spin_unlock_irqrestore(&video->irqlock, flags);
881 }
882 
883 static struct vb2_ops vsp1_video_queue_qops = {
884 	.queue_setup = vsp1_video_queue_setup,
885 	.buf_prepare = vsp1_video_buffer_prepare,
886 	.buf_queue = vsp1_video_buffer_queue,
887 	.wait_prepare = vb2_ops_wait_prepare,
888 	.wait_finish = vb2_ops_wait_finish,
889 	.start_streaming = vsp1_video_start_streaming,
890 	.stop_streaming = vsp1_video_stop_streaming,
891 };
892 
893 /* -----------------------------------------------------------------------------
894  * V4L2 ioctls
895  */
896 
897 static int
vsp1_video_querycap(struct file * file,void * fh,struct v4l2_capability * cap)898 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
899 {
900 	struct v4l2_fh *vfh = file->private_data;
901 	struct vsp1_video *video = to_vsp1_video(vfh->vdev);
902 
903 	cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
904 			  | V4L2_CAP_VIDEO_CAPTURE_MPLANE
905 			  | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
906 
907 	if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
908 		cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
909 				 | V4L2_CAP_STREAMING;
910 	else
911 		cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
912 				 | V4L2_CAP_STREAMING;
913 
914 	strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
915 	strlcpy(cap->card, video->video.name, sizeof(cap->card));
916 	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
917 		 dev_name(video->vsp1->dev));
918 
919 	return 0;
920 }
921 
922 static int
vsp1_video_get_format(struct file * file,void * fh,struct v4l2_format * format)923 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
924 {
925 	struct v4l2_fh *vfh = file->private_data;
926 	struct vsp1_video *video = to_vsp1_video(vfh->vdev);
927 
928 	if (format->type != video->queue.type)
929 		return -EINVAL;
930 
931 	mutex_lock(&video->lock);
932 	format->fmt.pix_mp = video->format;
933 	mutex_unlock(&video->lock);
934 
935 	return 0;
936 }
937 
938 static int
vsp1_video_try_format(struct file * file,void * fh,struct v4l2_format * format)939 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
940 {
941 	struct v4l2_fh *vfh = file->private_data;
942 	struct vsp1_video *video = to_vsp1_video(vfh->vdev);
943 
944 	if (format->type != video->queue.type)
945 		return -EINVAL;
946 
947 	return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
948 }
949 
950 static int
vsp1_video_set_format(struct file * file,void * fh,struct v4l2_format * format)951 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
952 {
953 	struct v4l2_fh *vfh = file->private_data;
954 	struct vsp1_video *video = to_vsp1_video(vfh->vdev);
955 	const struct vsp1_format_info *info;
956 	int ret;
957 
958 	if (format->type != video->queue.type)
959 		return -EINVAL;
960 
961 	ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
962 	if (ret < 0)
963 		return ret;
964 
965 	mutex_lock(&video->lock);
966 
967 	if (vb2_is_busy(&video->queue)) {
968 		ret = -EBUSY;
969 		goto done;
970 	}
971 
972 	video->format = format->fmt.pix_mp;
973 	video->fmtinfo = info;
974 
975 done:
976 	mutex_unlock(&video->lock);
977 	return ret;
978 }
979 
980 static int
vsp1_video_streamon(struct file * file,void * fh,enum v4l2_buf_type type)981 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
982 {
983 	struct v4l2_fh *vfh = file->private_data;
984 	struct vsp1_video *video = to_vsp1_video(vfh->vdev);
985 	struct vsp1_pipeline *pipe;
986 	int ret;
987 
988 	if (video->queue.owner && video->queue.owner != file->private_data)
989 		return -EBUSY;
990 
991 	video->sequence = 0;
992 
993 	/* Start streaming on the pipeline. No link touching an entity in the
994 	 * pipeline can be activated or deactivated once streaming is started.
995 	 *
996 	 * Use the VSP1 pipeline object embedded in the first video object that
997 	 * starts streaming.
998 	 */
999 	pipe = video->video.entity.pipe
1000 	     ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1001 
1002 	ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1003 	if (ret < 0)
1004 		return ret;
1005 
1006 	/* Verify that the configured format matches the output of the connected
1007 	 * subdev.
1008 	 */
1009 	ret = vsp1_video_verify_format(video);
1010 	if (ret < 0)
1011 		goto err_stop;
1012 
1013 	ret = vsp1_pipeline_init(pipe, video);
1014 	if (ret < 0)
1015 		goto err_stop;
1016 
1017 	/* Start the queue. */
1018 	ret = vb2_streamon(&video->queue, type);
1019 	if (ret < 0)
1020 		goto err_cleanup;
1021 
1022 	return 0;
1023 
1024 err_cleanup:
1025 	vsp1_pipeline_cleanup(pipe);
1026 err_stop:
1027 	media_entity_pipeline_stop(&video->video.entity);
1028 	return ret;
1029 }
1030 
1031 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1032 	.vidioc_querycap		= vsp1_video_querycap,
1033 	.vidioc_g_fmt_vid_cap_mplane	= vsp1_video_get_format,
1034 	.vidioc_s_fmt_vid_cap_mplane	= vsp1_video_set_format,
1035 	.vidioc_try_fmt_vid_cap_mplane	= vsp1_video_try_format,
1036 	.vidioc_g_fmt_vid_out_mplane	= vsp1_video_get_format,
1037 	.vidioc_s_fmt_vid_out_mplane	= vsp1_video_set_format,
1038 	.vidioc_try_fmt_vid_out_mplane	= vsp1_video_try_format,
1039 	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
1040 	.vidioc_querybuf		= vb2_ioctl_querybuf,
1041 	.vidioc_qbuf			= vb2_ioctl_qbuf,
1042 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
1043 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
1044 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
1045 	.vidioc_streamon		= vsp1_video_streamon,
1046 	.vidioc_streamoff		= vb2_ioctl_streamoff,
1047 };
1048 
1049 /* -----------------------------------------------------------------------------
1050  * V4L2 File Operations
1051  */
1052 
vsp1_video_open(struct file * file)1053 static int vsp1_video_open(struct file *file)
1054 {
1055 	struct vsp1_video *video = video_drvdata(file);
1056 	struct v4l2_fh *vfh;
1057 	int ret = 0;
1058 
1059 	vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1060 	if (vfh == NULL)
1061 		return -ENOMEM;
1062 
1063 	v4l2_fh_init(vfh, &video->video);
1064 	v4l2_fh_add(vfh);
1065 
1066 	file->private_data = vfh;
1067 
1068 	ret = vsp1_device_get(video->vsp1);
1069 	if (ret < 0) {
1070 		v4l2_fh_del(vfh);
1071 		kfree(vfh);
1072 	}
1073 
1074 	return ret;
1075 }
1076 
vsp1_video_release(struct file * file)1077 static int vsp1_video_release(struct file *file)
1078 {
1079 	struct vsp1_video *video = video_drvdata(file);
1080 	struct v4l2_fh *vfh = file->private_data;
1081 
1082 	mutex_lock(&video->lock);
1083 	if (video->queue.owner == vfh) {
1084 		vb2_queue_release(&video->queue);
1085 		video->queue.owner = NULL;
1086 	}
1087 	mutex_unlock(&video->lock);
1088 
1089 	vsp1_device_put(video->vsp1);
1090 
1091 	v4l2_fh_release(file);
1092 
1093 	file->private_data = NULL;
1094 
1095 	return 0;
1096 }
1097 
1098 static struct v4l2_file_operations vsp1_video_fops = {
1099 	.owner = THIS_MODULE,
1100 	.unlocked_ioctl = video_ioctl2,
1101 	.open = vsp1_video_open,
1102 	.release = vsp1_video_release,
1103 	.poll = vb2_fop_poll,
1104 	.mmap = vb2_fop_mmap,
1105 };
1106 
1107 /* -----------------------------------------------------------------------------
1108  * Initialization and Cleanup
1109  */
1110 
vsp1_video_init(struct vsp1_video * video,struct vsp1_entity * rwpf)1111 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
1112 {
1113 	const char *direction;
1114 	int ret;
1115 
1116 	switch (video->type) {
1117 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1118 		direction = "output";
1119 		video->pad.flags = MEDIA_PAD_FL_SINK;
1120 		break;
1121 
1122 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1123 		direction = "input";
1124 		video->pad.flags = MEDIA_PAD_FL_SOURCE;
1125 		video->video.vfl_dir = VFL_DIR_TX;
1126 		break;
1127 
1128 	default:
1129 		return -EINVAL;
1130 	}
1131 
1132 	video->rwpf = rwpf;
1133 
1134 	mutex_init(&video->lock);
1135 	spin_lock_init(&video->irqlock);
1136 	INIT_LIST_HEAD(&video->irqqueue);
1137 
1138 	mutex_init(&video->pipe.lock);
1139 	spin_lock_init(&video->pipe.irqlock);
1140 	INIT_LIST_HEAD(&video->pipe.entities);
1141 	init_waitqueue_head(&video->pipe.wq);
1142 	video->pipe.state = VSP1_PIPELINE_STOPPED;
1143 
1144 	/* Initialize the media entity... */
1145 	ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1146 	if (ret < 0)
1147 		return ret;
1148 
1149 	/* ... and the format ... */
1150 	video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1151 	video->format.pixelformat = video->fmtinfo->fourcc;
1152 	video->format.colorspace = V4L2_COLORSPACE_SRGB;
1153 	video->format.field = V4L2_FIELD_NONE;
1154 	video->format.width = VSP1_VIDEO_DEF_WIDTH;
1155 	video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1156 	video->format.num_planes = 1;
1157 	video->format.plane_fmt[0].bytesperline =
1158 		video->format.width * video->fmtinfo->bpp[0] / 8;
1159 	video->format.plane_fmt[0].sizeimage =
1160 		video->format.plane_fmt[0].bytesperline * video->format.height;
1161 
1162 	/* ... and the video node... */
1163 	video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1164 	video->video.fops = &vsp1_video_fops;
1165 	snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1166 		 rwpf->subdev.name, direction);
1167 	video->video.vfl_type = VFL_TYPE_GRABBER;
1168 	video->video.release = video_device_release_empty;
1169 	video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1170 
1171 	video_set_drvdata(&video->video, video);
1172 
1173 	/* ... and the buffers queue... */
1174 	video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1175 	if (IS_ERR(video->alloc_ctx)) {
1176 		ret = PTR_ERR(video->alloc_ctx);
1177 		goto error;
1178 	}
1179 
1180 	video->queue.type = video->type;
1181 	video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1182 	video->queue.lock = &video->lock;
1183 	video->queue.drv_priv = video;
1184 	video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1185 	video->queue.ops = &vsp1_video_queue_qops;
1186 	video->queue.mem_ops = &vb2_dma_contig_memops;
1187 	video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1188 	ret = vb2_queue_init(&video->queue);
1189 	if (ret < 0) {
1190 		dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1191 		goto error;
1192 	}
1193 
1194 	/* ... and register the video device. */
1195 	video->video.queue = &video->queue;
1196 	ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1197 	if (ret < 0) {
1198 		dev_err(video->vsp1->dev, "failed to register video device\n");
1199 		goto error;
1200 	}
1201 
1202 	return 0;
1203 
1204 error:
1205 	vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1206 	vsp1_video_cleanup(video);
1207 	return ret;
1208 }
1209 
vsp1_video_cleanup(struct vsp1_video * video)1210 void vsp1_video_cleanup(struct vsp1_video *video)
1211 {
1212 	if (video_is_registered(&video->video))
1213 		video_unregister_device(&video->video);
1214 
1215 	vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1216 	media_entity_cleanup(&video->video.entity);
1217 }
1218