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[media] usb: Make use of media_bus_format enum
[mirror_ubuntu-artful-kernel.git] / drivers / staging / media / omap4iss / iss_video.c
CommitLineData
fc96d58c
SA		 1/*
2 * TI OMAP4 ISS V4L2 Driver - Generic video node
3 *
4 * Copyright (C) 2012 Texas Instruments, Inc.
5 *
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.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 <asm/cacheflush.h>
15#include <linux/clk.h>
16#include <linux/mm.h>
17#include <linux/pagemap.h>
18#include <linux/sched.h>
19#include <linux/slab.h>
20#include <linux/vmalloc.h>
21#include <linux/module.h>
22#include <media/v4l2-dev.h>
23#include <media/v4l2-ioctl.h>
24
25#include "iss_video.h"
26#include "iss.h"
27
18661234
LP		 28static unsigned debug;
29module_param(debug, uint, 0644);
30MODULE_PARM_DESC(debug, "activates debug info");
fc96d58c
SA		 31
32/* -----------------------------------------------------------------------------
33 * Helper functions
34 */
35
36static struct iss_format_info formats[] = {
37 { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
38 V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
a1d4eab0 39 V4L2_PIX_FMT_GREY, 8, "Greyscale 8 bpp", },
fc96d58c
SA		 40 { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10,
41 V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8,
a1d4eab0 42 V4L2_PIX_FMT_Y10, 10, "Greyscale 10 bpp", },
fc96d58c
SA		 43 { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10,
44 V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8,
a1d4eab0 45 V4L2_PIX_FMT_Y12, 12, "Greyscale 12 bpp", },
fc96d58c
SA		 46 { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
47 V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
a1d4eab0 48 V4L2_PIX_FMT_SBGGR8, 8, "BGGR Bayer 8 bpp", },
fc96d58c
SA		 49 { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
50 V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
a1d4eab0 51 V4L2_PIX_FMT_SGBRG8, 8, "GBRG Bayer 8 bpp", },
fc96d58c
SA		 52 { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
53 V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
a1d4eab0 54 V4L2_PIX_FMT_SGRBG8, 8, "GRBG Bayer 8 bpp", },
fc96d58c
SA		 55 { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
56 V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
a1d4eab0 57 V4L2_PIX_FMT_SRGGB8, 8, "RGGB Bayer 8 bpp", },
fc96d58c
SA		 58 { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
59 V4L2_MBUS_FMT_SGRBG10_1X10, 0,
a1d4eab0 60 V4L2_PIX_FMT_SGRBG10DPCM8, 8, "GRBG Bayer 10 bpp DPCM8", },
fc96d58c
SA		 61 { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10,
62 V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8,
a1d4eab0 63 V4L2_PIX_FMT_SBGGR10, 10, "BGGR Bayer 10 bpp", },
fc96d58c
SA		 64 { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10,
65 V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8,
a1d4eab0 66 V4L2_PIX_FMT_SGBRG10, 10, "GBRG Bayer 10 bpp", },
fc96d58c
SA		 67 { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10,
68 V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8,
a1d4eab0 69 V4L2_PIX_FMT_SGRBG10, 10, "GRBG Bayer 10 bpp", },
fc96d58c
SA		 70 { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10,
71 V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8,
a1d4eab0 72 V4L2_PIX_FMT_SRGGB10, 10, "RGGB Bayer 10 bpp", },
fc96d58c
SA		 73 { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10,
74 V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8,
a1d4eab0 75 V4L2_PIX_FMT_SBGGR12, 12, "BGGR Bayer 12 bpp", },
fc96d58c
SA		 76 { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10,
77 V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8,
a1d4eab0 78 V4L2_PIX_FMT_SGBRG12, 12, "GBRG Bayer 12 bpp", },
fc96d58c
SA		 79 { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10,
80 V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8,
a1d4eab0 81 V4L2_PIX_FMT_SGRBG12, 12, "GRBG Bayer 12 bpp", },
fc96d58c
SA		 82 { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10,
83 V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8,
a1d4eab0 84 V4L2_PIX_FMT_SRGGB12, 12, "RGGB Bayer 12 bpp", },
fc96d58c
SA		 85 { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16,
86 V4L2_MBUS_FMT_UYVY8_1X16, 0,
a1d4eab0 87 V4L2_PIX_FMT_UYVY, 16, "YUV 4:2:2 (UYVY)", },
fc96d58c
SA		 88 { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16,
89 V4L2_MBUS_FMT_YUYV8_1X16, 0,
a1d4eab0 90 V4L2_PIX_FMT_YUYV, 16, "YUV 4:2:2 (YUYV)", },
fc96d58c
SA		 91 { V4L2_MBUS_FMT_YUYV8_1_5X8, V4L2_MBUS_FMT_YUYV8_1_5X8,
92 V4L2_MBUS_FMT_YUYV8_1_5X8, 0,
a1d4eab0 93 V4L2_PIX_FMT_NV12, 8, "YUV 4:2:0 (NV12)", },
fc96d58c
SA		 94};
95
96const struct iss_format_info *
97omap4iss_video_format_info(enum v4l2_mbus_pixelcode code)
98{
99 unsigned int i;
100
101 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
102 if (formats[i].code == code)
103 return &formats[i];
104 }
105
106 return NULL;
107}
108
109/*
110 * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
111 * @video: ISS video instance
112 * @mbus: v4l2_mbus_framefmt format (input)
113 * @pix: v4l2_pix_format format (output)
114 *
115 * Fill the output pix structure with information from the input mbus format.
116 * The bytesperline and sizeimage fields are computed from the requested bytes
117 * per line value in the pix format and information from the video instance.
118 *
119 * Return the number of padding bytes at end of line.
120 */
121static unsigned int iss_video_mbus_to_pix(const struct iss_video *video,
122 const struct v4l2_mbus_framefmt *mbus,
123 struct v4l2_pix_format *pix)
124{
125 unsigned int bpl = pix->bytesperline;
126 unsigned int min_bpl;
127 unsigned int i;
128
129 memset(pix, 0, sizeof(*pix));
130 pix->width = mbus->width;
131 pix->height = mbus->height;
132
133 /* Skip the last format in the loop so that it will be selected if no
134 * match is found.
135 */
136 for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
137 if (formats[i].code == mbus->code)
138 break;
139 }
140
141 min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8;
142
143 /* Clamp the requested bytes per line value. If the maximum bytes per
144 * line value is zero, the module doesn't support user configurable line
145 * sizes. Override the requested value with the minimum in that case.
146 */
147 if (video->bpl_max)
148 bpl = clamp(bpl, min_bpl, video->bpl_max);
149 else
150 bpl = min_bpl;
151
152 if (!video->bpl_zero_padding || bpl != min_bpl)
153 bpl = ALIGN(bpl, video->bpl_alignment);
154
155 pix->pixelformat = formats[i].pixelformat;
156 pix->bytesperline = bpl;
157 pix->sizeimage = pix->bytesperline * pix->height;
158 pix->colorspace = mbus->colorspace;
159 pix->field = mbus->field;
160
161 /* FIXME: Special case for NV12! We should make this nicer... */
162 if (pix->pixelformat == V4L2_PIX_FMT_NV12)
163 pix->sizeimage += (pix->bytesperline * pix->height) / 2;
164
165 return bpl - min_bpl;
166}
167
168static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix,
169 struct v4l2_mbus_framefmt *mbus)
170{
171 unsigned int i;
172
173 memset(mbus, 0, sizeof(*mbus));
174 mbus->width = pix->width;
175 mbus->height = pix->height;
176
177 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
178 if (formats[i].pixelformat == pix->pixelformat)
179 break;
180 }
181
182 if (WARN_ON(i == ARRAY_SIZE(formats)))
183 return;
184
185 mbus->code = formats[i].code;
186 mbus->colorspace = pix->colorspace;
187 mbus->field = pix->field;
188}
189
190static struct v4l2_subdev *
191iss_video_remote_subdev(struct iss_video *video, u32 *pad)
192{
193 struct media_pad *remote;
194
195 remote = media_entity_remote_pad(&video->pad);
196
197 if (remote == NULL ||
198 media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
199 return NULL;
200
201 if (pad)
202 *pad = remote->index;
203
204 return media_entity_to_v4l2_subdev(remote->entity);
205}
206
207/* Return a pointer to the ISS video instance at the far end of the pipeline. */
208static struct iss_video *
209iss_video_far_end(struct iss_video *video)
210{
211 struct media_entity_graph graph;
212 struct media_entity *entity = &video->video.entity;
213 struct media_device *mdev = entity->parent;
214 struct iss_video *far_end = NULL;
215
216 mutex_lock(&mdev->graph_mutex);
217 media_entity_graph_walk_start(&graph, entity);
218
219 while ((entity = media_entity_graph_walk_next(&graph))) {
220 if (entity == &video->video.entity)
221 continue;
222
223 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
224 continue;
225
226 far_end = to_iss_video(media_entity_to_video_device(entity));
227 if (far_end->type != video->type)
228 break;
229
230 far_end = NULL;
231 }
232
233 mutex_unlock(&mdev->graph_mutex);
234 return far_end;
235}
236
237static int
cc3c2ac2
LP		 238__iss_video_get_format(struct iss_video *video,
239 struct v4l2_mbus_framefmt *format)
fc96d58c
SA		 240{
241 struct v4l2_subdev_format fmt;
242 struct v4l2_subdev *subdev;
243 u32 pad;
244 int ret;
245
246 subdev = iss_video_remote_subdev(video, &pad);
247 if (subdev == NULL)
248 return -EINVAL;
249
cc3c2ac2 250 memset(&fmt, 0, sizeof(fmt));
fc96d58c
SA		 251 fmt.pad = pad;
252 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
fc96d58c 253
c3dbc70d
LP		 254 mutex_lock(&video->mutex);
255 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
fc96d58c
SA		 256 mutex_unlock(&video->mutex);
257
258 if (ret)
259 return ret;
260
cc3c2ac2
LP		 261 *format = fmt.format;
262 return 0;
fc96d58c
SA		 263}
264
265static int
266iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh)
267{
cc3c2ac2
LP		 268 struct v4l2_mbus_framefmt format;
269 struct v4l2_pix_format pixfmt;
fc96d58c
SA		 270 int ret;
271
fc96d58c
SA		 272 ret = __iss_video_get_format(video, &format);
273 if (ret < 0)
274 return ret;
275
cc3c2ac2
LP		 276 pixfmt.bytesperline = 0;
277 ret = iss_video_mbus_to_pix(video, &format, &pixfmt);
278
279 if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat ||
280 vfh->format.fmt.pix.height != pixfmt.height ||
281 vfh->format.fmt.pix.width != pixfmt.width ||
282 vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline ||
283 vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage)
fc96d58c
SA		 284 return -EINVAL;
285
286 return ret;
287}
288
289/* -----------------------------------------------------------------------------
290 * Video queue operations
291 */
292
a0fe029c
LP		 293static int iss_video_queue_setup(struct vb2_queue *vq,
294 const struct v4l2_format *fmt,
fc96d58c
SA		 295 unsigned int *count, unsigned int *num_planes,
296 unsigned int sizes[], void *alloc_ctxs[])
297{
298 struct iss_video_fh *vfh = vb2_get_drv_priv(vq);
299 struct iss_video *video = vfh->video;
300
301 /* Revisit multi-planar support for NV12 */
302 *num_planes = 1;
303
304 sizes[0] = vfh->format.fmt.pix.sizeimage;
305 if (sizes[0] == 0)
306 return -EINVAL;
307
308 alloc_ctxs[0] = video->alloc_ctx;
309
a0fe029c 310 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
fc96d58c
SA		 311
312 return 0;
313}
314
315static void iss_video_buf_cleanup(struct vb2_buffer *vb)
316{
317 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
318
319 if (buffer->iss_addr)
320 buffer->iss_addr = 0;
321}
322
323static int iss_video_buf_prepare(struct vb2_buffer *vb)
324{
325 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
326 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
327 struct iss_video *video = vfh->video;
328 unsigned long size = vfh->format.fmt.pix.sizeimage;
329 dma_addr_t addr;
330
331 if (vb2_plane_size(vb, 0) < size)
332 return -ENOBUFS;
333
334 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
335 if (!IS_ALIGNED(addr, 32)) {
499226fb
LP		 336 dev_dbg(video->iss->dev,
337 "Buffer address must be aligned to 32 bytes boundary.\n");
fc96d58c
SA		 338 return -EINVAL;
339 }
340
341 vb2_set_plane_payload(vb, 0, size);
342 buffer->iss_addr = addr;
343 return 0;
344}
345
346static void iss_video_buf_queue(struct vb2_buffer *vb)
347{
348 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
349 struct iss_video *video = vfh->video;
350 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
351 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
fc96d58c 352 unsigned long flags;
112da085 353 bool empty;
fc96d58c
SA		 354
355 spin_lock_irqsave(&video->qlock, flags);
112da085 356
cb766937
LP		 357 /* Mark the buffer is faulty and give it back to the queue immediately
358 * if the video node has registered an error. vb2 will perform the same
359 * check when preparing the buffer, but that is inherently racy, so we
360 * need to handle the race condition with an authoritative check here.
361 */
112da085
LP		 362 if (unlikely(video->error)) {
363 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
364 spin_unlock_irqrestore(&video->qlock, flags);
365 return;
366 }
367
fc96d58c
SA		 368 empty = list_empty(&video->dmaqueue);
369 list_add_tail(&buffer->list, &video->dmaqueue);
112da085 370
fc96d58c
SA		 371 spin_unlock_irqrestore(&video->qlock, flags);
372
373 if (empty) {
374 enum iss_pipeline_state state;
375 unsigned int start;
376
377 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
378 state = ISS_PIPELINE_QUEUE_OUTPUT;
379 else
380 state = ISS_PIPELINE_QUEUE_INPUT;
381
382 spin_lock_irqsave(&pipe->lock, flags);
383 pipe->state |= state;
384 video->ops->queue(video, buffer);
385 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED;
386
387 start = iss_pipeline_ready(pipe);
388 if (start)
389 pipe->state |= ISS_PIPELINE_STREAM;
390 spin_unlock_irqrestore(&pipe->lock, flags);
391
392 if (start)
393 omap4iss_pipeline_set_stream(pipe,
394 ISS_PIPELINE_STREAM_SINGLESHOT);
395 }
396}
397
fbac1400 398static const struct vb2_ops iss_video_vb2ops = {
fc96d58c
SA		 399 .queue_setup = iss_video_queue_setup,
400 .buf_prepare = iss_video_buf_prepare,
401 .buf_queue = iss_video_buf_queue,
402 .buf_cleanup = iss_video_buf_cleanup,
403};
404
405/*
406 * omap4iss_video_buffer_next - Complete the current buffer and return the next
407 * @video: ISS video object
408 *
409 * Remove the current video buffer from the DMA queue and fill its timestamp,
410 * field count and state fields before waking up its completion handler.
411 *
412 * For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no
413 * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
414 *
415 * The DMA queue is expected to contain at least one buffer.
416 *
417 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
418 * empty.
419 */
420struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
421{
422 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
423 enum iss_pipeline_state state;
424 struct iss_buffer *buf;
425 unsigned long flags;
426 struct timespec ts;
427
428 spin_lock_irqsave(&video->qlock, flags);
429 if (WARN_ON(list_empty(&video->dmaqueue))) {
430 spin_unlock_irqrestore(&video->qlock, flags);
431 return NULL;
432 }
433
434 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
435 list);
436 list_del(&buf->list);
437 spin_unlock_irqrestore(&video->qlock, flags);
438
439 ktime_get_ts(&ts);
440 buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
441 buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
442
443 /* Do frame number propagation only if this is the output video node.
444 * Frame number either comes from the CSI receivers or it gets
445 * incremented here if H3A is not active.
446 * Note: There is no guarantee that the output buffer will finish
447 * first, so the input number might lag behind by 1 in some cases.
448 */
449 if (video == pipe->output && !pipe->do_propagation)
a0fe029c
LP		 450 buf->vb.v4l2_buf.sequence =
451 atomic_inc_return(&pipe->frame_number);
fc96d58c
SA		 452 else
453 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
454
a0fe029c
LP		 455 vb2_buffer_done(&buf->vb, pipe->error ?
456 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
fc96d58c
SA		 457 pipe->error = false;
458
459 spin_lock_irqsave(&video->qlock, flags);
460 if (list_empty(&video->dmaqueue)) {
461 spin_unlock_irqrestore(&video->qlock, flags);
462 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
463 state = ISS_PIPELINE_QUEUE_OUTPUT
464 | ISS_PIPELINE_STREAM;
465 else
466 state = ISS_PIPELINE_QUEUE_INPUT
467 | ISS_PIPELINE_STREAM;
468
469 spin_lock_irqsave(&pipe->lock, flags);
470 pipe->state &= ~state;
471 if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS)
472 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
473 spin_unlock_irqrestore(&pipe->lock, flags);
474 return NULL;
475 }
476
477 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
f7d40eea 478 spin_lock(&pipe->lock);
fc96d58c 479 pipe->state &= ~ISS_PIPELINE_STREAM;
f7d40eea 480 spin_unlock(&pipe->lock);
fc96d58c
SA		 481 }
482
483 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
484 list);
485 spin_unlock_irqrestore(&video->qlock, flags);
486 buf->vb.state = VB2_BUF_STATE_ACTIVE;
487 return buf;
488}
489
112da085
LP		 490/*
491 * omap4iss_video_cancel_stream - Cancel stream on a video node
492 * @video: ISS video object
493 *
494 * Cancelling a stream mark all buffers on the video node as erroneous and makes
495 * sure no new buffer can be queued.
496 */
497void omap4iss_video_cancel_stream(struct iss_video *video)
498{
499 unsigned long flags;
500
501 spin_lock_irqsave(&video->qlock, flags);
502
503 while (!list_empty(&video->dmaqueue)) {
504 struct iss_buffer *buf;
505
506 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
507 list);
508 list_del(&buf->list);
509 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
510 }
511
cb766937 512 vb2_queue_error(video->queue);
112da085
LP		 513 video->error = true;
514
515 spin_unlock_irqrestore(&video->qlock, flags);
516}
517
fc96d58c
SA		 518/* -----------------------------------------------------------------------------
519 * V4L2 ioctls
520 */
521
522static int
523iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
524{
525 struct iss_video *video = video_drvdata(file);
526
527 strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver));
528 strlcpy(cap->card, video->video.name, sizeof(cap->card));
529 strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
530
531 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
35c71be8 532 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
fc96d58c 533 else
35c71be8
LP		 534 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
535
536 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
537 | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT;
fc96d58c
SA		 538
539 return 0;
540}
541
0b1d4249
LP		 542static int
543iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
544{
545 struct iss_video *video = video_drvdata(file);
546 struct v4l2_mbus_framefmt format;
547 unsigned int index = f->index;
548 unsigned int i;
549 int ret;
550
551 if (f->type != video->type)
552 return -EINVAL;
553
554 ret = __iss_video_get_format(video, &format);
555 if (ret < 0)
556 return ret;
557
558 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
559 const struct iss_format_info *info = &formats[i];
560
561 if (format.code != info->code)
562 continue;
563
564 if (index == 0) {
565 f->pixelformat = info->pixelformat;
566 strlcpy(f->description, info->description,
567 sizeof(f->description));
568 return 0;
569 }
570
571 index--;
572 }
573
574 return -EINVAL;
575}
576
fc96d58c
SA		 577static int
578iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
579{
580 struct iss_video_fh *vfh = to_iss_video_fh(fh);
581 struct iss_video *video = video_drvdata(file);
582
583 if (format->type != video->type)
584 return -EINVAL;
585
586 mutex_lock(&video->mutex);
587 *format = vfh->format;
588 mutex_unlock(&video->mutex);
589
590 return 0;
591}
592
593static int
594iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
595{
596 struct iss_video_fh *vfh = to_iss_video_fh(fh);
597 struct iss_video *video = video_drvdata(file);
598 struct v4l2_mbus_framefmt fmt;
599
600 if (format->type != video->type)
601 return -EINVAL;
602
603 mutex_lock(&video->mutex);
604
605 /* Fill the bytesperline and sizeimage fields by converting to media bus
606 * format and back to pixel format.
607 */
608 iss_video_pix_to_mbus(&format->fmt.pix, &fmt);
609 iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
610
611 vfh->format = *format;
612
613 mutex_unlock(&video->mutex);
614 return 0;
615}
616
617static int
618iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
619{
620 struct iss_video *video = video_drvdata(file);
621 struct v4l2_subdev_format fmt;
622 struct v4l2_subdev *subdev;
623 u32 pad;
624 int ret;
625
626 if (format->type != video->type)
627 return -EINVAL;
628
629 subdev = iss_video_remote_subdev(video, &pad);
630 if (subdev == NULL)
631 return -EINVAL;
632
633 iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
634
635 fmt.pad = pad;
636 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
637 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
638 if (ret)
e43484e4 639 return ret;
fc96d58c
SA		 640
641 iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
642 return 0;
643}
644
645static int
646iss_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
647{
648 struct iss_video *video = video_drvdata(file);
649 struct v4l2_subdev *subdev;
650 int ret;
651
652 subdev = iss_video_remote_subdev(video, NULL);
653 if (subdev == NULL)
654 return -EINVAL;
655
656 mutex_lock(&video->mutex);
657 ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
658 mutex_unlock(&video->mutex);
659
4a62361f 660 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
fc96d58c
SA		 661}
662
663static int
664iss_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
665{
666 struct iss_video *video = video_drvdata(file);
667 struct v4l2_subdev_format format;
668 struct v4l2_subdev *subdev;
669 u32 pad;
670 int ret;
671
672 subdev = iss_video_remote_subdev(video, &pad);
673 if (subdev == NULL)
674 return -EINVAL;
675
676 /* Try the get crop operation first and fallback to get format if not
677 * implemented.
678 */
679 ret = v4l2_subdev_call(subdev, video, g_crop, crop);
680 if (ret != -ENOIOCTLCMD)
681 return ret;
682
683 format.pad = pad;
684 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
685 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
686 if (ret < 0)
4a62361f 687 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
fc96d58c
SA		 688
689 crop->c.left = 0;
690 crop->c.top = 0;
691 crop->c.width = format.format.width;
692 crop->c.height = format.format.height;
693
694 return 0;
695}
696
697static int
698iss_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
699{
700 struct iss_video *video = video_drvdata(file);
701 struct v4l2_subdev *subdev;
702 int ret;
703
704 subdev = iss_video_remote_subdev(video, NULL);
705 if (subdev == NULL)
706 return -EINVAL;
707
708 mutex_lock(&video->mutex);
709 ret = v4l2_subdev_call(subdev, video, s_crop, crop);
710 mutex_unlock(&video->mutex);
711
4a62361f 712 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
fc96d58c
SA		 713}
714
715static int
716iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
717{
718 struct iss_video_fh *vfh = to_iss_video_fh(fh);
719 struct iss_video *video = video_drvdata(file);
720
721 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
722 video->type != a->type)
723 return -EINVAL;
724
725 memset(a, 0, sizeof(*a));
726 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
727 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
728 a->parm.output.timeperframe = vfh->timeperframe;
729
730 return 0;
731}
732
733static int
734iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
735{
736 struct iss_video_fh *vfh = to_iss_video_fh(fh);
737 struct iss_video *video = video_drvdata(file);
738
739 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
740 video->type != a->type)
741 return -EINVAL;
742
743 if (a->parm.output.timeperframe.denominator == 0)
744 a->parm.output.timeperframe.denominator = 1;
745
746 vfh->timeperframe = a->parm.output.timeperframe;
747
748 return 0;
749}
750
751static int
752iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
753{
754 struct iss_video_fh *vfh = to_iss_video_fh(fh);
755
756 return vb2_reqbufs(&vfh->queue, rb);
757}
758
759static int
760iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
761{
762 struct iss_video_fh *vfh = to_iss_video_fh(fh);
763
764 return vb2_querybuf(&vfh->queue, b);
765}
766
767static int
768iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
769{
770 struct iss_video_fh *vfh = to_iss_video_fh(fh);
771
772 return vb2_qbuf(&vfh->queue, b);
773}
774
775static int
776iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
777{
778 struct iss_video_fh *vfh = to_iss_video_fh(fh);
779
780 return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
781}
782
783/*
784 * Stream management
785 *
786 * Every ISS pipeline has a single input and a single output. The input can be
787 * either a sensor or a video node. The output is always a video node.
788 *
789 * As every pipeline has an output video node, the ISS video objects at the
790 * pipeline output stores the pipeline state. It tracks the streaming state of
791 * both the input and output, as well as the availability of buffers.
792 *
793 * In sensor-to-memory mode, frames are always available at the pipeline input.
794 * Starting the sensor usually requires I2C transfers and must be done in
795 * interruptible context. The pipeline is started and stopped synchronously
796 * to the stream on/off commands. All modules in the pipeline will get their
797 * subdev set stream handler called. The module at the end of the pipeline must
798 * delay starting the hardware until buffers are available at its output.
799 *
800 * In memory-to-memory mode, starting/stopping the stream requires
801 * synchronization between the input and output. ISS modules can't be stopped
802 * in the middle of a frame, and at least some of the modules seem to become
803 * busy as soon as they're started, even if they don't receive a frame start
804 * event. For that reason frames need to be processed in single-shot mode. The
805 * driver needs to wait until a frame is completely processed and written to
806 * memory before restarting the pipeline for the next frame. Pipelined
807 * processing might be possible but requires more testing.
808 *
809 * Stream start must be delayed until buffers are available at both the input
810 * and output. The pipeline must be started in the videobuf queue callback with
811 * the buffers queue spinlock held. The modules subdev set stream operation must
812 * not sleep.
813 */
814static int
815iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
816{
817 struct iss_video_fh *vfh = to_iss_video_fh(fh);
818 struct iss_video *video = video_drvdata(file);
f3632ba8
LP		 819 struct media_entity_graph graph;
820 struct media_entity *entity;
fc96d58c
SA		 821 enum iss_pipeline_state state;
822 struct iss_pipeline *pipe;
823 struct iss_video *far_end;
824 unsigned long flags;
825 int ret;
826
827 if (type != video->type)
828 return -EINVAL;
829
830 mutex_lock(&video->stream_lock);
831
fc96d58c
SA		 832 /* Start streaming on the pipeline. No link touching an entity in the
833 * pipeline can be activated or deactivated once streaming is started.
834 */
835 pipe = video->video.entity.pipe
836 ? to_iss_pipeline(&video->video.entity) : &video->pipe;
837 pipe->external = NULL;
838 pipe->external_rate = 0;
839 pipe->external_bpp = 0;
f3632ba8 840 pipe->entities = 0;
fc96d58c
SA		 841
842 if (video->iss->pdata->set_constraints)
843 video->iss->pdata->set_constraints(video->iss, true);
844
845 ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
846 if (ret < 0)
847 goto err_media_entity_pipeline_start;
848
f3632ba8
LP		 849 entity = &video->video.entity;
850 media_entity_graph_walk_start(&graph, entity);
851 while ((entity = media_entity_graph_walk_next(&graph)))
852 pipe->entities |= 1 << entity->id;
853
fc96d58c
SA		 854 /* Verify that the currently configured format matches the output of
855 * the connected subdev.
856 */
857 ret = iss_video_check_format(video, vfh);
858 if (ret < 0)
859 goto err_iss_video_check_format;
860
861 video->bpl_padding = ret;
862 video->bpl_value = vfh->format.fmt.pix.bytesperline;
863
864 /* Find the ISS video node connected at the far end of the pipeline and
865 * update the pipeline.
866 */
867 far_end = iss_video_far_end(video);
868
869 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
870 state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT;
871 pipe->input = far_end;
872 pipe->output = video;
873 } else {
874 if (far_end == NULL) {
875 ret = -EPIPE;
876 goto err_iss_video_check_format;
877 }
878
879 state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT;
880 pipe->input = video;
881 pipe->output = far_end;
882 }
883
884 spin_lock_irqsave(&pipe->lock, flags);
885 pipe->state &= ~ISS_PIPELINE_STREAM;
886 pipe->state |= state;
887 spin_unlock_irqrestore(&pipe->lock, flags);
888
889 /* Set the maximum time per frame as the value requested by userspace.
890 * This is a soft limit that can be overridden if the hardware doesn't
891 * support the request limit.
892 */
893 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
894 pipe->max_timeperframe = vfh->timeperframe;
895
896 video->queue = &vfh->queue;
897 INIT_LIST_HEAD(&video->dmaqueue);
112da085 898 video->error = false;
fc96d58c
SA		 899 atomic_set(&pipe->frame_number, -1);
900
901 ret = vb2_streamon(&vfh->queue, type);
902 if (ret < 0)
903 goto err_iss_video_check_format;
904
905 /* In sensor-to-memory mode, the stream can be started synchronously
906 * to the stream on command. In memory-to-memory mode, it will be
907 * started when buffers are queued on both the input and output.
908 */
909 if (pipe->input == NULL) {
910 unsigned long flags;
00ef07e3 911
fc96d58c
SA		 912 ret = omap4iss_pipeline_set_stream(pipe,
913 ISS_PIPELINE_STREAM_CONTINUOUS);
914 if (ret < 0)
915 goto err_omap4iss_set_stream;
916 spin_lock_irqsave(&video->qlock, flags);
917 if (list_empty(&video->dmaqueue))
918 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
919 spin_unlock_irqrestore(&video->qlock, flags);
920 }
921
2b16b44a
LP		 922 mutex_unlock(&video->stream_lock);
923 return 0;
924
fc96d58c 925err_omap4iss_set_stream:
2b16b44a 926 vb2_streamoff(&vfh->queue, type);
fc96d58c 927err_iss_video_check_format:
2b16b44a 928 media_entity_pipeline_stop(&video->video.entity);
fc96d58c 929err_media_entity_pipeline_start:
2b16b44a
LP		 930 if (video->iss->pdata->set_constraints)
931 video->iss->pdata->set_constraints(video->iss, false);
932 video->queue = NULL;
fc96d58c 933
fc96d58c
SA		 934 mutex_unlock(&video->stream_lock);
935 return ret;
936}
937
938static int
939iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
940{
941 struct iss_video_fh *vfh = to_iss_video_fh(fh);
942 struct iss_video *video = video_drvdata(file);
943 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
944 enum iss_pipeline_state state;
945 unsigned long flags;
946
947 if (type != video->type)
948 return -EINVAL;
949
950 mutex_lock(&video->stream_lock);
951
952 if (!vb2_is_streaming(&vfh->queue))
953 goto done;
954
955 /* Update the pipeline state. */
956 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
957 state = ISS_PIPELINE_STREAM_OUTPUT
958 | ISS_PIPELINE_QUEUE_OUTPUT;
959 else
960 state = ISS_PIPELINE_STREAM_INPUT
961 | ISS_PIPELINE_QUEUE_INPUT;
962
963 spin_lock_irqsave(&pipe->lock, flags);
964 pipe->state &= ~state;
965 spin_unlock_irqrestore(&pipe->lock, flags);
966
967 /* Stop the stream. */
968 omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED);
969 vb2_streamoff(&vfh->queue, type);
970 video->queue = NULL;
fc96d58c
SA		 971
972 if (video->iss->pdata->set_constraints)
973 video->iss->pdata->set_constraints(video->iss, false);
974 media_entity_pipeline_stop(&video->video.entity);
975
976done:
977 mutex_unlock(&video->stream_lock);
978 return 0;
979}
980
981static int
982iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
983{
984 if (input->index > 0)
985 return -EINVAL;
986
987 strlcpy(input->name, "camera", sizeof(input->name));
988 input->type = V4L2_INPUT_TYPE_CAMERA;
989
990 return 0;
991}
992
993static int
994iss_video_g_input(struct file *file, void *fh, unsigned int *input)
995{
996 *input = 0;
997
998 return 0;
999}
1000
16422f55
LP		 1001static int
1002iss_video_s_input(struct file *file, void *fh, unsigned int input)
1003{
1004 return input == 0 ? 0 : -EINVAL;
1005}
1006
fc96d58c
SA		 1007static const struct v4l2_ioctl_ops iss_video_ioctl_ops = {
1008 .vidioc_querycap = iss_video_querycap,
0b1d4249 1009 .vidioc_enum_fmt_vid_cap = iss_video_enum_format,
fc96d58c
SA		 1010 .vidioc_g_fmt_vid_cap = iss_video_get_format,
1011 .vidioc_s_fmt_vid_cap = iss_video_set_format,
1012 .vidioc_try_fmt_vid_cap = iss_video_try_format,
1013 .vidioc_g_fmt_vid_out = iss_video_get_format,
1014 .vidioc_s_fmt_vid_out = iss_video_set_format,
1015 .vidioc_try_fmt_vid_out = iss_video_try_format,
1016 .vidioc_cropcap = iss_video_cropcap,
1017 .vidioc_g_crop = iss_video_get_crop,
1018 .vidioc_s_crop = iss_video_set_crop,
1019 .vidioc_g_parm = iss_video_get_param,
1020 .vidioc_s_parm = iss_video_set_param,
1021 .vidioc_reqbufs = iss_video_reqbufs,
1022 .vidioc_querybuf = iss_video_querybuf,
1023 .vidioc_qbuf = iss_video_qbuf,
1024 .vidioc_dqbuf = iss_video_dqbuf,
1025 .vidioc_streamon = iss_video_streamon,
1026 .vidioc_streamoff = iss_video_streamoff,
1027 .vidioc_enum_input = iss_video_enum_input,
1028 .vidioc_g_input = iss_video_g_input,
16422f55 1029 .vidioc_s_input = iss_video_s_input,
fc96d58c
SA		 1030};
1031
1032/* -----------------------------------------------------------------------------
1033 * V4L2 file operations
1034 */
1035
1036static int iss_video_open(struct file *file)
1037{
1038 struct iss_video *video = video_drvdata(file);
1039 struct iss_video_fh *handle;
1040 struct vb2_queue *q;
1041 int ret = 0;
1042
1043 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1044 if (handle == NULL)
1045 return -ENOMEM;
1046
18661234
LP		 1047 video->video.debug = debug;
1048
fc96d58c
SA		 1049 v4l2_fh_init(&handle->vfh, &video->video);
1050 v4l2_fh_add(&handle->vfh);
1051
1052 /* If this is the first user, initialise the pipeline. */
1053 if (omap4iss_get(video->iss) == NULL) {
1054 ret = -EBUSY;
1055 goto done;
1056 }
1057
1058 ret = omap4iss_pipeline_pm_use(&video->video.entity, 1);
1059 if (ret < 0) {
1060 omap4iss_put(video->iss);
1061 goto done;
1062 }
1063
1064 video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev);
1065 if (IS_ERR(video->alloc_ctx)) {
1066 ret = PTR_ERR(video->alloc_ctx);
1067 omap4iss_put(video->iss);
1068 goto done;
1069 }
1070
1071 q = &handle->queue;
1072
1073 q->type = video->type;
1074 q->io_modes = VB2_MMAP;
1075 q->drv_priv = handle;
1076 q->ops = &iss_video_vb2ops;
1077 q->mem_ops = &vb2_dma_contig_memops;
1078 q->buf_struct_size = sizeof(struct iss_buffer);
ade48681 1079 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
fc96d58c
SA		 1080
1081 ret = vb2_queue_init(q);
1082 if (ret) {
1083 omap4iss_put(video->iss);
1084 goto done;
1085 }
1086
1087 memset(&handle->format, 0, sizeof(handle->format));
1088 handle->format.type = video->type;
1089 handle->timeperframe.denominator = 1;
1090
1091 handle->video = video;
1092 file->private_data = &handle->vfh;
1093
1094done:
1095 if (ret < 0) {
1096 v4l2_fh_del(&handle->vfh);
1097 kfree(handle);
1098 }
1099
1100 return ret;
1101}
1102
1103static int iss_video_release(struct file *file)
1104{
1105 struct iss_video *video = video_drvdata(file);
1106 struct v4l2_fh *vfh = file->private_data;
1107 struct iss_video_fh *handle = to_iss_video_fh(vfh);
1108
1109 /* Disable streaming and free the buffers queue resources. */
1110 iss_video_streamoff(file, vfh, video->type);
1111
1112 omap4iss_pipeline_pm_use(&video->video.entity, 0);
1113
1114 /* Release the videobuf2 queue */
1115 vb2_queue_release(&handle->queue);
1116
1117 /* Release the file handle. */
1118 v4l2_fh_del(vfh);
1119 kfree(handle);
1120 file->private_data = NULL;
1121
1122 omap4iss_put(video->iss);
1123
1124 return 0;
1125}
1126
1127static unsigned int iss_video_poll(struct file *file, poll_table *wait)
1128{
1129 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1130
1131 return vb2_poll(&vfh->queue, file, wait);
1132}
1133
1134static int iss_video_mmap(struct file *file, struct vm_area_struct *vma)
1135{
1136 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1137
29ee6261 1138 return vb2_mmap(&vfh->queue, vma);
fc96d58c
SA		 1139}
1140
1141static struct v4l2_file_operations iss_video_fops = {
1142 .owner = THIS_MODULE,
1143 .unlocked_ioctl = video_ioctl2,
1144 .open = iss_video_open,
1145 .release = iss_video_release,
1146 .poll = iss_video_poll,
1147 .mmap = iss_video_mmap,
1148};
1149
1150/* -----------------------------------------------------------------------------
1151 * ISS video core
1152 */
1153
1154static const struct iss_video_operations iss_video_dummy_ops = {
1155};
1156
1157int omap4iss_video_init(struct iss_video *video, const char *name)
1158{
1159 const char *direction;
1160 int ret;
1161
1162 switch (video->type) {
1163 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1164 direction = "output";
1165 video->pad.flags = MEDIA_PAD_FL_SINK;
1166 break;
1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1168 direction = "input";
1169 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1170 break;
1171
1172 default:
1173 return -EINVAL;
1174 }
1175
1176 ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1177 if (ret < 0)
1178 return ret;
1179
2b44ac9e 1180 spin_lock_init(&video->qlock);
fc96d58c
SA		 1181 mutex_init(&video->mutex);
1182 atomic_set(&video->active, 0);
1183
1184 spin_lock_init(&video->pipe.lock);
1185 mutex_init(&video->stream_lock);
1186
1187 /* Initialize the video device. */
1188 if (video->ops == NULL)
1189 video->ops = &iss_video_dummy_ops;
1190
1191 video->video.fops = &iss_video_fops;
1192 snprintf(video->video.name, sizeof(video->video.name),
1193 "OMAP4 ISS %s %s", name, direction);
1194 video->video.vfl_type = VFL_TYPE_GRABBER;
1195 video->video.release = video_device_release_empty;
1196 video->video.ioctl_ops = &iss_video_ioctl_ops;
1197 video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED;
1198
1199 video_set_drvdata(&video->video, video);
1200
1201 return 0;
1202}
1203
1204void omap4iss_video_cleanup(struct iss_video *video)
1205{
1206 media_entity_cleanup(&video->video.entity);
1207 mutex_destroy(&video->stream_lock);
1208 mutex_destroy(&video->mutex);
1209}
1210
1211int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev)
1212{
1213 int ret;
1214
1215 video->video.v4l2_dev = vdev;
1216
1217 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1218 if (ret < 0)
4cd89e91
LP		 1219 dev_err(video->iss->dev,
1220 "%s: could not register video device (%d)\n",
fc96d58c
SA		 1221 __func__, ret);
1222
1223 return ret;
1224}
1225
1226void omap4iss_video_unregister(struct iss_video *video)
1227{
2b7f0b64 1228 video_unregister_device(&video->video);
fc96d58c 1229}
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