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WIP FPC-III support
[linux/fpc-iii.git] / drivers / media / platform / omap3isp / ispvideo.c
blob8811d6dd4ee747fc76374b9da7a832ba1bed7e94
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ispvideo.c
4 *
5 * TI OMAP3 ISP - Generic video node
6 *
7 * Copyright (C) 2009-2010 Nokia Corporation
8 *
9 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * Sakari Ailus <sakari.ailus@iki.fi>
11 */
12
13 #include <linux/clk.h>
14 #include <linux/mm.h>
15 #include <linux/module.h>
16 #include <linux/pagemap.h>
17 #include <linux/scatterlist.h>
18 #include <linux/sched.h>
19 #include <linux/slab.h>
20 #include <linux/vmalloc.h>
21
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-mc.h>
25 #include <media/videobuf2-dma-contig.h>
26
27 #include "ispvideo.h"
28 #include "isp.h"
29
30
31 /* -----------------------------------------------------------------------------
32 * Helper functions
33 */
34
35 /*
36 * NOTE: When adding new media bus codes, always remember to add
37 * corresponding in-memory formats to the table below!!!
38 */
39 static struct isp_format_info formats[] = {
40 { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
41 MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
42 V4L2_PIX_FMT_GREY, 8, 1, },
43 { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
44 MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
45 V4L2_PIX_FMT_Y10, 10, 2, },
46 { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
47 MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
48 V4L2_PIX_FMT_Y12, 12, 2, },
49 { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
50 MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
51 V4L2_PIX_FMT_SBGGR8, 8, 1, },
52 { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
53 MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
54 V4L2_PIX_FMT_SGBRG8, 8, 1, },
55 { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
56 MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
57 V4L2_PIX_FMT_SGRBG8, 8, 1, },
58 { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
59 MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
60 V4L2_PIX_FMT_SRGGB8, 8, 1, },
61 { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
62 MEDIA_BUS_FMT_SBGGR10_1X10, 0,
63 V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
64 { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
65 MEDIA_BUS_FMT_SGBRG10_1X10, 0,
66 V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
67 { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
68 MEDIA_BUS_FMT_SGRBG10_1X10, 0,
69 V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
70 { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
71 MEDIA_BUS_FMT_SRGGB10_1X10, 0,
72 V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
73 { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
74 MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
75 V4L2_PIX_FMT_SBGGR10, 10, 2, },
76 { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
77 MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
78 V4L2_PIX_FMT_SGBRG10, 10, 2, },
79 { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
80 MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
81 V4L2_PIX_FMT_SGRBG10, 10, 2, },
82 { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
83 MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
84 V4L2_PIX_FMT_SRGGB10, 10, 2, },
85 { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
86 MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
87 V4L2_PIX_FMT_SBGGR12, 12, 2, },
88 { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
89 MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
90 V4L2_PIX_FMT_SGBRG12, 12, 2, },
91 { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
92 MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
93 V4L2_PIX_FMT_SGRBG12, 12, 2, },
94 { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
95 MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
96 V4L2_PIX_FMT_SRGGB12, 12, 2, },
97 { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
98 MEDIA_BUS_FMT_UYVY8_1X16, 0,
99 V4L2_PIX_FMT_UYVY, 16, 2, },
100 { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
101 MEDIA_BUS_FMT_YUYV8_1X16, 0,
102 V4L2_PIX_FMT_YUYV, 16, 2, },
103 { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
104 MEDIA_BUS_FMT_UYVY8_2X8, 0,
105 V4L2_PIX_FMT_UYVY, 8, 2, },
106 { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8,
107 MEDIA_BUS_FMT_YUYV8_2X8, 0,
108 V4L2_PIX_FMT_YUYV, 8, 2, },
109 /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
110 * module and avoid NULL pointer dereferences.
111 */
112 { 0, }
113 };
114
115 const struct isp_format_info *omap3isp_video_format_info(u32 code)
116 {
117 unsigned int i;
118
119 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
120 if (formats[i].code == code)
121 return &formats[i];
122 }
123
124 return NULL;
125 }
126
127 /*
128 * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
129 * @video: ISP video instance
130 * @mbus: v4l2_mbus_framefmt format (input)
131 * @pix: v4l2_pix_format format (output)
132 *
133 * Fill the output pix structure with information from the input mbus format.
134 * The bytesperline and sizeimage fields are computed from the requested bytes
135 * per line value in the pix format and information from the video instance.
136 *
137 * Return the number of padding bytes at end of line.
138 */
139 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
140 const struct v4l2_mbus_framefmt *mbus,
141 struct v4l2_pix_format *pix)
142 {
143 unsigned int bpl = pix->bytesperline;
144 unsigned int min_bpl;
145 unsigned int i;
146
147 memset(pix, 0, sizeof(*pix));
148 pix->width = mbus->width;
149 pix->height = mbus->height;
150
151 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
152 if (formats[i].code == mbus->code)
153 break;
154 }
155
156 if (WARN_ON(i == ARRAY_SIZE(formats)))
157 return 0;
158
159 min_bpl = pix->width * formats[i].bpp;
160
161 /* Clamp the requested bytes per line value. If the maximum bytes per
162 * line value is zero, the module doesn't support user configurable line
163 * sizes. Override the requested value with the minimum in that case.
164 */
165 if (video->bpl_max)
166 bpl = clamp(bpl, min_bpl, video->bpl_max);
167 else
168 bpl = min_bpl;
169
170 if (!video->bpl_zero_padding || bpl != min_bpl)
171 bpl = ALIGN(bpl, video->bpl_alignment);
172
173 pix->pixelformat = formats[i].pixelformat;
174 pix->bytesperline = bpl;
175 pix->sizeimage = pix->bytesperline * pix->height;
176 pix->colorspace = mbus->colorspace;
177 pix->field = mbus->field;
178
179 return bpl - min_bpl;
180 }
181
182 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
183 struct v4l2_mbus_framefmt *mbus)
184 {
185 unsigned int i;
186
187 memset(mbus, 0, sizeof(*mbus));
188 mbus->width = pix->width;
189 mbus->height = pix->height;
190
191 /* Skip the last format in the loop so that it will be selected if no
192 * match is found.
193 */
194 for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
195 if (formats[i].pixelformat == pix->pixelformat)
196 break;
197 }
198
199 mbus->code = formats[i].code;
200 mbus->colorspace = pix->colorspace;
201 mbus->field = pix->field;
202 }
203
204 static struct v4l2_subdev *
205 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
206 {
207 struct media_pad *remote;
208
209 remote = media_entity_remote_pad(&video->pad);
210
211 if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
212 return NULL;
213
214 if (pad)
215 *pad = remote->index;
216
217 return media_entity_to_v4l2_subdev(remote->entity);
218 }
219
220 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
221 static int isp_video_get_graph_data(struct isp_video *video,
222 struct isp_pipeline *pipe)
223 {
224 struct media_graph graph;
225 struct media_entity *entity = &video->video.entity;
226 struct media_device *mdev = entity->graph_obj.mdev;
227 struct isp_video *far_end = NULL;
228 int ret;
229
230 mutex_lock(&mdev->graph_mutex);
231 ret = media_graph_walk_init(&graph, mdev);
232 if (ret) {
233 mutex_unlock(&mdev->graph_mutex);
234 return ret;
235 }
236
237 media_graph_walk_start(&graph, entity);
238
239 while ((entity = media_graph_walk_next(&graph))) {
240 struct isp_video *__video;
241
242 media_entity_enum_set(&pipe->ent_enum, entity);
243
244 if (far_end != NULL)
245 continue;
246
247 if (entity == &video->video.entity)
248 continue;
249
250 if (!is_media_entity_v4l2_video_device(entity))
251 continue;
252
253 __video = to_isp_video(media_entity_to_video_device(entity));
254 if (__video->type != video->type)
255 far_end = __video;
256 }
257
258 mutex_unlock(&mdev->graph_mutex);
259
260 media_graph_walk_cleanup(&graph);
261
262 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
263 pipe->input = far_end;
264 pipe->output = video;
265 } else {
266 if (far_end == NULL)
267 return -EPIPE;
268
269 pipe->input = video;
270 pipe->output = far_end;
271 }
272
273 return 0;
274 }
275
276 static int
277 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
278 {
279 struct v4l2_subdev_format fmt;
280 struct v4l2_subdev *subdev;
281 u32 pad;
282 int ret;
283
284 subdev = isp_video_remote_subdev(video, &pad);
285 if (subdev == NULL)
286 return -EINVAL;
287
288 fmt.pad = pad;
289 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
290
291 mutex_lock(&video->mutex);
292 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
293 mutex_unlock(&video->mutex);
294
295 if (ret)
296 return ret;
297
298 format->type = video->type;
299 return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
300 }
301
302 static int
303 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
304 {
305 struct v4l2_format format;
306 int ret;
307
308 memcpy(&format, &vfh->format, sizeof(format));
309 ret = __isp_video_get_format(video, &format);
310 if (ret < 0)
311 return ret;
312
313 if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
314 vfh->format.fmt.pix.height != format.fmt.pix.height ||
315 vfh->format.fmt.pix.width != format.fmt.pix.width ||
316 vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
317 vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage ||
318 vfh->format.fmt.pix.field != format.fmt.pix.field)
319 return -EINVAL;
320
321 return 0;
322 }
323
324 /* -----------------------------------------------------------------------------
325 * Video queue operations
326 */
327
328 static int isp_video_queue_setup(struct vb2_queue *queue,
329 unsigned int *count, unsigned int *num_planes,
330 unsigned int sizes[], struct device *alloc_devs[])
331 {
332 struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
333 struct isp_video *video = vfh->video;
334
335 *num_planes = 1;
336
337 sizes[0] = vfh->format.fmt.pix.sizeimage;
338 if (sizes[0] == 0)
339 return -EINVAL;
340
341 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
342
343 return 0;
344 }
345
346 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
347 {
348 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
349 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
350 struct isp_buffer *buffer = to_isp_buffer(vbuf);
351 struct isp_video *video = vfh->video;
352 dma_addr_t addr;
353
354 /* Refuse to prepare the buffer is the video node has registered an
355 * error. We don't need to take any lock here as the operation is
356 * inherently racy. The authoritative check will be performed in the
357 * queue handler, which can't return an error, this check is just a best
358 * effort to notify userspace as early as possible.
359 */
360 if (unlikely(video->error))
361 return -EIO;
362
363 addr = vb2_dma_contig_plane_dma_addr(buf, 0);
364 if (!IS_ALIGNED(addr, 32)) {
365 dev_dbg(video->isp->dev,
366 "Buffer address must be aligned to 32 bytes boundary.\n");
367 return -EINVAL;
368 }
369
370 vb2_set_plane_payload(&buffer->vb.vb2_buf, 0,
371 vfh->format.fmt.pix.sizeimage);
372 buffer->dma = addr;
373
374 return 0;
375 }
376
377 /*
378 * isp_video_buffer_queue - Add buffer to streaming queue
379 * @buf: Video buffer
380 *
381 * In memory-to-memory mode, start streaming on the pipeline if buffers are
382 * queued on both the input and the output, if the pipeline isn't already busy.
383 * If the pipeline is busy, it will be restarted in the output module interrupt
384 * handler.
385 */
386 static void isp_video_buffer_queue(struct vb2_buffer *buf)
387 {
388 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
389 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
390 struct isp_buffer *buffer = to_isp_buffer(vbuf);
391 struct isp_video *video = vfh->video;
392 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
393 enum isp_pipeline_state state;
394 unsigned long flags;
395 unsigned int empty;
396 unsigned int start;
397
398 spin_lock_irqsave(&video->irqlock, flags);
399
400 if (unlikely(video->error)) {
401 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
402 spin_unlock_irqrestore(&video->irqlock, flags);
403 return;
404 }
405
406 empty = list_empty(&video->dmaqueue);
407 list_add_tail(&buffer->irqlist, &video->dmaqueue);
408
409 spin_unlock_irqrestore(&video->irqlock, flags);
410
411 if (empty) {
412 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
413 state = ISP_PIPELINE_QUEUE_OUTPUT;
414 else
415 state = ISP_PIPELINE_QUEUE_INPUT;
416
417 spin_lock_irqsave(&pipe->lock, flags);
418 pipe->state |= state;
419 video->ops->queue(video, buffer);
420 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
421
422 start = isp_pipeline_ready(pipe);
423 if (start)
424 pipe->state |= ISP_PIPELINE_STREAM;
425 spin_unlock_irqrestore(&pipe->lock, flags);
426
427 if (start)
428 omap3isp_pipeline_set_stream(pipe,
429 ISP_PIPELINE_STREAM_SINGLESHOT);
430 }
431 }
432
433 /*
434 * omap3isp_video_return_buffers - Return all queued buffers to videobuf2
435 * @video: ISP video object
436 * @state: new state for the returned buffers
437 *
438 * Return all buffers queued on the video node to videobuf2 in the given state.
439 * The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error
440 * when starting the stream, or VB2_BUF_STATE_ERROR otherwise.
441 *
442 * The function must be called with the video irqlock held.
443 */
444 static void omap3isp_video_return_buffers(struct isp_video *video,
445 enum vb2_buffer_state state)
446 {
447 while (!list_empty(&video->dmaqueue)) {
448 struct isp_buffer *buf;
449
450 buf = list_first_entry(&video->dmaqueue,
451 struct isp_buffer, irqlist);
452 list_del(&buf->irqlist);
453 vb2_buffer_done(&buf->vb.vb2_buf, state);
454 }
455 }
456
457 static int isp_video_start_streaming(struct vb2_queue *queue,
458 unsigned int count)
459 {
460 struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
461 struct isp_video *video = vfh->video;
462 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
463 unsigned long flags;
464 int ret;
465
466 /* In sensor-to-memory mode, the stream can be started synchronously
467 * to the stream on command. In memory-to-memory mode, it will be
468 * started when buffers are queued on both the input and output.
469 */
470 if (pipe->input)
471 return 0;
472
473 ret = omap3isp_pipeline_set_stream(pipe,
474 ISP_PIPELINE_STREAM_CONTINUOUS);
475 if (ret < 0) {
476 spin_lock_irqsave(&video->irqlock, flags);
477 omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED);
478 spin_unlock_irqrestore(&video->irqlock, flags);
479 return ret;
480 }
481
482 spin_lock_irqsave(&video->irqlock, flags);
483 if (list_empty(&video->dmaqueue))
484 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
485 spin_unlock_irqrestore(&video->irqlock, flags);
486
487 return 0;
488 }
489
490 static const struct vb2_ops isp_video_queue_ops = {
491 .queue_setup = isp_video_queue_setup,
492 .buf_prepare = isp_video_buffer_prepare,
493 .buf_queue = isp_video_buffer_queue,
494 .start_streaming = isp_video_start_streaming,
495 };
496
497 /*
498 * omap3isp_video_buffer_next - Complete the current buffer and return the next
499 * @video: ISP video object
500 *
501 * Remove the current video buffer from the DMA queue and fill its timestamp and
502 * field count before handing it back to videobuf2.
503 *
504 * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
505 * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
506 * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
507 *
508 * The DMA queue is expected to contain at least one buffer.
509 *
510 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
511 * empty.
512 */
513 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
514 {
515 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
516 enum vb2_buffer_state vb_state;
517 struct isp_buffer *buf;
518 unsigned long flags;
519
520 spin_lock_irqsave(&video->irqlock, flags);
521 if (WARN_ON(list_empty(&video->dmaqueue))) {
522 spin_unlock_irqrestore(&video->irqlock, flags);
523 return NULL;
524 }
525
526 buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
527 irqlist);
528 list_del(&buf->irqlist);
529 spin_unlock_irqrestore(&video->irqlock, flags);
530
531 buf->vb.vb2_buf.timestamp = ktime_get_ns();
532
533 /* Do frame number propagation only if this is the output video node.
534 * Frame number either comes from the CSI receivers or it gets
535 * incremented here if H3A is not active.
536 * Note: There is no guarantee that the output buffer will finish
537 * first, so the input number might lag behind by 1 in some cases.
538 */
539 if (video == pipe->output && !pipe->do_propagation)
540 buf->vb.sequence =
541 atomic_inc_return(&pipe->frame_number);
542 else
543 buf->vb.sequence = atomic_read(&pipe->frame_number);
544
545 if (pipe->field != V4L2_FIELD_NONE)
546 buf->vb.sequence /= 2;
547
548 buf->vb.field = pipe->field;
549
550 /* Report pipeline errors to userspace on the capture device side. */
551 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
552 vb_state = VB2_BUF_STATE_ERROR;
553 pipe->error = false;
554 } else {
555 vb_state = VB2_BUF_STATE_DONE;
556 }
557
558 vb2_buffer_done(&buf->vb.vb2_buf, vb_state);
559
560 spin_lock_irqsave(&video->irqlock, flags);
561
562 if (list_empty(&video->dmaqueue)) {
563 enum isp_pipeline_state state;
564
565 spin_unlock_irqrestore(&video->irqlock, flags);
566
567 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
568 state = ISP_PIPELINE_QUEUE_OUTPUT
569 | ISP_PIPELINE_STREAM;
570 else
571 state = ISP_PIPELINE_QUEUE_INPUT
572 | ISP_PIPELINE_STREAM;
573
574 spin_lock_irqsave(&pipe->lock, flags);
575 pipe->state &= ~state;
576 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
577 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
578 spin_unlock_irqrestore(&pipe->lock, flags);
579 return NULL;
580 }
581
582 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
583 spin_lock(&pipe->lock);
584 pipe->state &= ~ISP_PIPELINE_STREAM;
585 spin_unlock(&pipe->lock);
586 }
587
588 buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
589 irqlist);
590
591 spin_unlock_irqrestore(&video->irqlock, flags);
592
593 return buf;
594 }
595
596 /*
597 * omap3isp_video_cancel_stream - Cancel stream on a video node
598 * @video: ISP video object
599 *
600 * Cancelling a stream returns all buffers queued on the video node to videobuf2
601 * in the erroneous state and makes sure no new buffer can be queued.
602 */
603 void omap3isp_video_cancel_stream(struct isp_video *video)
604 {
605 unsigned long flags;
606
607 spin_lock_irqsave(&video->irqlock, flags);
608 omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR);
609 video->error = true;
610 spin_unlock_irqrestore(&video->irqlock, flags);
611 }
612
613 /*
614 * omap3isp_video_resume - Perform resume operation on the buffers
615 * @video: ISP video object
616 * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
617 *
618 * This function is intended to be used on suspend/resume scenario. It
619 * requests video queue layer to discard buffers marked as DONE if it's in
620 * continuous mode and requests ISP modules to queue again the ACTIVE buffer
621 * if there's any.
622 */
623 void omap3isp_video_resume(struct isp_video *video, int continuous)
624 {
625 struct isp_buffer *buf = NULL;
626
627 if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
628 mutex_lock(&video->queue_lock);
629 vb2_discard_done(video->queue);
630 mutex_unlock(&video->queue_lock);
631 }
632
633 if (!list_empty(&video->dmaqueue)) {
634 buf = list_first_entry(&video->dmaqueue,
635 struct isp_buffer, irqlist);
636 video->ops->queue(video, buf);
637 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
638 } else {
639 if (continuous)
640 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
641 }
642 }
643
644 /* -----------------------------------------------------------------------------
645 * V4L2 ioctls
646 */
647
648 static int
649 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
650 {
651 struct isp_video *video = video_drvdata(file);
652
653 strscpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
654 strscpy(cap->card, video->video.name, sizeof(cap->card));
655 strscpy(cap->bus_info, "media", sizeof(cap->bus_info));
656
657 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
658 | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
659
660
661 return 0;
662 }
663
664 static int
665 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
666 {
667 struct isp_video_fh *vfh = to_isp_video_fh(fh);
668 struct isp_video *video = video_drvdata(file);
669
670 if (format->type != video->type)
671 return -EINVAL;
672
673 mutex_lock(&video->mutex);
674 *format = vfh->format;
675 mutex_unlock(&video->mutex);
676
677 return 0;
678 }
679
680 static int
681 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
682 {
683 struct isp_video_fh *vfh = to_isp_video_fh(fh);
684 struct isp_video *video = video_drvdata(file);
685 struct v4l2_mbus_framefmt fmt;
686
687 if (format->type != video->type)
688 return -EINVAL;
689
690 /* Replace unsupported field orders with sane defaults. */
691 switch (format->fmt.pix.field) {
692 case V4L2_FIELD_NONE:
693 /* Progressive is supported everywhere. */
694 break;
695 case V4L2_FIELD_ALTERNATE:
696 /* ALTERNATE is not supported on output nodes. */
697 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
698 format->fmt.pix.field = V4L2_FIELD_NONE;
699 break;
700 case V4L2_FIELD_INTERLACED:
701 /* The ISP has no concept of video standard, select the
702 * top-bottom order when the unqualified interlaced order is
703 * requested.
704 */
705 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
706 fallthrough;
707 case V4L2_FIELD_INTERLACED_TB:
708 case V4L2_FIELD_INTERLACED_BT:
709 /* Interlaced orders are only supported at the CCDC output. */
710 if (video != &video->isp->isp_ccdc.video_out)
711 format->fmt.pix.field = V4L2_FIELD_NONE;
712 break;
713 case V4L2_FIELD_TOP:
714 case V4L2_FIELD_BOTTOM:
715 case V4L2_FIELD_SEQ_TB:
716 case V4L2_FIELD_SEQ_BT:
717 default:
718 /* All other field orders are currently unsupported, default to
719 * progressive.
720 */
721 format->fmt.pix.field = V4L2_FIELD_NONE;
722 break;
723 }
724
725 /* Fill the bytesperline and sizeimage fields by converting to media bus
726 * format and back to pixel format.
727 */
728 isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
729 isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
730
731 mutex_lock(&video->mutex);
732 vfh->format = *format;
733 mutex_unlock(&video->mutex);
734
735 return 0;
736 }
737
738 static int
739 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
740 {
741 struct isp_video *video = video_drvdata(file);
742 struct v4l2_subdev_format fmt;
743 struct v4l2_subdev *subdev;
744 u32 pad;
745 int ret;
746
747 if (format->type != video->type)
748 return -EINVAL;
749
750 subdev = isp_video_remote_subdev(video, &pad);
751 if (subdev == NULL)
752 return -EINVAL;
753
754 isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
755
756 fmt.pad = pad;
757 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
758 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
759 if (ret)
760 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
761
762 isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
763 return 0;
764 }
765
766 static int
767 isp_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel)
768 {
769 struct isp_video *video = video_drvdata(file);
770 struct v4l2_subdev_format format;
771 struct v4l2_subdev *subdev;
772 struct v4l2_subdev_selection sdsel = {
773 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
774 .target = sel->target,
775 };
776 u32 pad;
777 int ret;
778
779 switch (sel->target) {
780 case V4L2_SEL_TGT_CROP:
781 case V4L2_SEL_TGT_CROP_BOUNDS:
782 case V4L2_SEL_TGT_CROP_DEFAULT:
783 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
784 return -EINVAL;
785 break;
786 case V4L2_SEL_TGT_COMPOSE:
787 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
788 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
789 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
790 return -EINVAL;
791 break;
792 default:
793 return -EINVAL;
794 }
795 subdev = isp_video_remote_subdev(video, &pad);
796 if (subdev == NULL)
797 return -EINVAL;
798
799 /* Try the get selection operation first and fallback to get format if not
800 * implemented.
801 */
802 sdsel.pad = pad;
803 ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
804 if (!ret)
805 sel->r = sdsel.r;
806 if (ret != -ENOIOCTLCMD)
807 return ret;
808
809 format.pad = pad;
810 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
811 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
812 if (ret < 0)
813 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
814
815 sel->r.left = 0;
816 sel->r.top = 0;
817 sel->r.width = format.format.width;
818 sel->r.height = format.format.height;
819
820 return 0;
821 }
822
823 static int
824 isp_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel)
825 {
826 struct isp_video *video = video_drvdata(file);
827 struct v4l2_subdev *subdev;
828 struct v4l2_subdev_selection sdsel = {
829 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
830 .target = sel->target,
831 .flags = sel->flags,
832 .r = sel->r,
833 };
834 u32 pad;
835 int ret;
836
837 switch (sel->target) {
838 case V4L2_SEL_TGT_CROP:
839 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
840 return -EINVAL;
841 break;
842 case V4L2_SEL_TGT_COMPOSE:
843 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
844 return -EINVAL;
845 break;
846 default:
847 return -EINVAL;
848 }
849 subdev = isp_video_remote_subdev(video, &pad);
850 if (subdev == NULL)
851 return -EINVAL;
852
853 sdsel.pad = pad;
854 mutex_lock(&video->mutex);
855 ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
856 mutex_unlock(&video->mutex);
857 if (!ret)
858 sel->r = sdsel.r;
859
860 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
861 }
862
863 static int
864 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
865 {
866 struct isp_video_fh *vfh = to_isp_video_fh(fh);
867 struct isp_video *video = video_drvdata(file);
868
869 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
870 video->type != a->type)
871 return -EINVAL;
872
873 memset(a, 0, sizeof(*a));
874 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
875 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
876 a->parm.output.timeperframe = vfh->timeperframe;
877
878 return 0;
879 }
880
881 static int
882 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
883 {
884 struct isp_video_fh *vfh = to_isp_video_fh(fh);
885 struct isp_video *video = video_drvdata(file);
886
887 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
888 video->type != a->type)
889 return -EINVAL;
890
891 if (a->parm.output.timeperframe.denominator == 0)
892 a->parm.output.timeperframe.denominator = 1;
893
894 vfh->timeperframe = a->parm.output.timeperframe;
895
896 return 0;
897 }
898
899 static int
900 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
901 {
902 struct isp_video_fh *vfh = to_isp_video_fh(fh);
903 struct isp_video *video = video_drvdata(file);
904 int ret;
905
906 mutex_lock(&video->queue_lock);
907 ret = vb2_reqbufs(&vfh->queue, rb);
908 mutex_unlock(&video->queue_lock);
909
910 return ret;
911 }
912
913 static int
914 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
915 {
916 struct isp_video_fh *vfh = to_isp_video_fh(fh);
917 struct isp_video *video = video_drvdata(file);
918 int ret;
919
920 mutex_lock(&video->queue_lock);
921 ret = vb2_querybuf(&vfh->queue, b);
922 mutex_unlock(&video->queue_lock);
923
924 return ret;
925 }
926
927 static int
928 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
929 {
930 struct isp_video_fh *vfh = to_isp_video_fh(fh);
931 struct isp_video *video = video_drvdata(file);
932 int ret;
933
934 mutex_lock(&video->queue_lock);
935 ret = vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b);
936 mutex_unlock(&video->queue_lock);
937
938 return ret;
939 }
940
941 static int
942 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
943 {
944 struct isp_video_fh *vfh = to_isp_video_fh(fh);
945 struct isp_video *video = video_drvdata(file);
946 int ret;
947
948 mutex_lock(&video->queue_lock);
949 ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
950 mutex_unlock(&video->queue_lock);
951
952 return ret;
953 }
954
955 static int isp_video_check_external_subdevs(struct isp_video *video,
956 struct isp_pipeline *pipe)
957 {
958 struct isp_device *isp = video->isp;
959 struct media_entity *ents[] = {
960 &isp->isp_csi2a.subdev.entity,
961 &isp->isp_csi2c.subdev.entity,
962 &isp->isp_ccp2.subdev.entity,
963 &isp->isp_ccdc.subdev.entity
964 };
965 struct media_pad *source_pad;
966 struct media_entity *source = NULL;
967 struct media_entity *sink;
968 struct v4l2_subdev_format fmt;
969 struct v4l2_ext_controls ctrls;
970 struct v4l2_ext_control ctrl;
971 unsigned int i;
972 int ret;
973
974 /* Memory-to-memory pipelines have no external subdev. */
975 if (pipe->input != NULL)
976 return 0;
977
978 for (i = 0; i < ARRAY_SIZE(ents); i++) {
979 /* Is the entity part of the pipeline? */
980 if (!media_entity_enum_test(&pipe->ent_enum, ents[i]))
981 continue;
982
983 /* ISP entities have always sink pad == 0. Find source. */
984 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
985 if (source_pad == NULL)
986 continue;
987
988 source = source_pad->entity;
989 sink = ents[i];
990 break;
991 }
992
993 if (!source) {
994 dev_warn(isp->dev, "can't find source, failing now\n");
995 return -EINVAL;
996 }
997
998 if (!is_media_entity_v4l2_subdev(source))
999 return 0;
1000
1001 pipe->external = media_entity_to_v4l2_subdev(source);
1002
1003 fmt.pad = source_pad->index;
1004 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
1005 ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
1006 pad, get_fmt, NULL, &fmt);
1007 if (unlikely(ret < 0)) {
1008 dev_warn(isp->dev, "get_fmt returned null!\n");
1009 return ret;
1010 }
1011
1012 pipe->external_width =
1013 omap3isp_video_format_info(fmt.format.code)->width;
1014
1015 memset(&ctrls, 0, sizeof(ctrls));
1016 memset(&ctrl, 0, sizeof(ctrl));
1017
1018 ctrl.id = V4L2_CID_PIXEL_RATE;
1019
1020 ctrls.count = 1;
1021 ctrls.controls = &ctrl;
1022 ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &video->video,
1023 NULL, &ctrls);
1024 if (ret < 0) {
1025 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
1026 pipe->external->name);
1027 return ret;
1028 }
1029
1030 pipe->external_rate = ctrl.value64;
1031
1032 if (media_entity_enum_test(&pipe->ent_enum,
1033 &isp->isp_ccdc.subdev.entity)) {
1034 unsigned int rate = UINT_MAX;
1035 /*
1036 * Check that maximum allowed CCDC pixel rate isn't
1037 * exceeded by the pixel rate.
1038 */
1039 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
1040 if (pipe->external_rate > rate)
1041 return -ENOSPC;
1042 }
1043
1044 return 0;
1045 }
1046
1047 /*
1048 * Stream management
1049 *
1050 * Every ISP pipeline has a single input and a single output. The input can be
1051 * either a sensor or a video node. The output is always a video node.
1052 *
1053 * As every pipeline has an output video node, the ISP video objects at the
1054 * pipeline output stores the pipeline state. It tracks the streaming state of
1055 * both the input and output, as well as the availability of buffers.
1056 *
1057 * In sensor-to-memory mode, frames are always available at the pipeline input.
1058 * Starting the sensor usually requires I2C transfers and must be done in
1059 * interruptible context. The pipeline is started and stopped synchronously
1060 * to the stream on/off commands. All modules in the pipeline will get their
1061 * subdev set stream handler called. The module at the end of the pipeline must
1062 * delay starting the hardware until buffers are available at its output.
1063 *
1064 * In memory-to-memory mode, starting/stopping the stream requires
1065 * synchronization between the input and output. ISP modules can't be stopped
1066 * in the middle of a frame, and at least some of the modules seem to become
1067 * busy as soon as they're started, even if they don't receive a frame start
1068 * event. For that reason frames need to be processed in single-shot mode. The
1069 * driver needs to wait until a frame is completely processed and written to
1070 * memory before restarting the pipeline for the next frame. Pipelined
1071 * processing might be possible but requires more testing.
1072 *
1073 * Stream start must be delayed until buffers are available at both the input
1074 * and output. The pipeline must be started in the videobuf queue callback with
1075 * the buffers queue spinlock held. The modules subdev set stream operation must
1076 * not sleep.
1077 */
1078 static int
1079 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1080 {
1081 struct isp_video_fh *vfh = to_isp_video_fh(fh);
1082 struct isp_video *video = video_drvdata(file);
1083 enum isp_pipeline_state state;
1084 struct isp_pipeline *pipe;
1085 unsigned long flags;
1086 int ret;
1087
1088 if (type != video->type)
1089 return -EINVAL;
1090
1091 mutex_lock(&video->stream_lock);
1092
1093 /* Start streaming on the pipeline. No link touching an entity in the
1094 * pipeline can be activated or deactivated once streaming is started.
1095 */
1096 pipe = video->video.entity.pipe
1097 ? to_isp_pipeline(&video->video.entity) : &video->pipe;
1098
1099 ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev);
1100 if (ret)
1101 goto err_enum_init;
1102
1103 /* TODO: Implement PM QoS */
1104 pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1105 pipe->max_rate = pipe->l3_ick;
1106
1107 ret = media_pipeline_start(&video->video.entity, &pipe->pipe);
1108 if (ret < 0)
1109 goto err_pipeline_start;
1110
1111 /* Verify that the currently configured format matches the output of
1112 * the connected subdev.
1113 */
1114 ret = isp_video_check_format(video, vfh);
1115 if (ret < 0)
1116 goto err_check_format;
1117
1118 video->bpl_padding = ret;
1119 video->bpl_value = vfh->format.fmt.pix.bytesperline;
1120
1121 ret = isp_video_get_graph_data(video, pipe);
1122 if (ret < 0)
1123 goto err_check_format;
1124
1125 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1126 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1127 else
1128 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1129
1130 ret = isp_video_check_external_subdevs(video, pipe);
1131 if (ret < 0)
1132 goto err_check_format;
1133
1134 pipe->error = false;
1135
1136 spin_lock_irqsave(&pipe->lock, flags);
1137 pipe->state &= ~ISP_PIPELINE_STREAM;
1138 pipe->state |= state;
1139 spin_unlock_irqrestore(&pipe->lock, flags);
1140
1141 /* Set the maximum time per frame as the value requested by userspace.
1142 * This is a soft limit that can be overridden if the hardware doesn't
1143 * support the request limit.
1144 */
1145 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1146 pipe->max_timeperframe = vfh->timeperframe;
1147
1148 video->queue = &vfh->queue;
1149 INIT_LIST_HEAD(&video->dmaqueue);
1150 atomic_set(&pipe->frame_number, -1);
1151 pipe->field = vfh->format.fmt.pix.field;
1152
1153 mutex_lock(&video->queue_lock);
1154 ret = vb2_streamon(&vfh->queue, type);
1155 mutex_unlock(&video->queue_lock);
1156 if (ret < 0)
1157 goto err_check_format;
1158
1159 mutex_unlock(&video->stream_lock);
1160
1161 return 0;
1162
1163 err_check_format:
1164 media_pipeline_stop(&video->video.entity);
1165 err_pipeline_start:
1166 /* TODO: Implement PM QoS */
1167 /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1168 * will get triggered the next time the CCDC is powered up will try to
1169 * access buffers that might have been freed but still present in the
1170 * DMA queue. This can easily get triggered if the above
1171 * omap3isp_pipeline_set_stream() call fails on a system with a
1172 * free-running sensor.
1173 */
1174 INIT_LIST_HEAD(&video->dmaqueue);
1175 video->queue = NULL;
1176
1177 media_entity_enum_cleanup(&pipe->ent_enum);
1178
1179 err_enum_init:
1180 mutex_unlock(&video->stream_lock);
1181
1182 return ret;
1183 }
1184
1185 static int
1186 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1187 {
1188 struct isp_video_fh *vfh = to_isp_video_fh(fh);
1189 struct isp_video *video = video_drvdata(file);
1190 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1191 enum isp_pipeline_state state;
1192 unsigned int streaming;
1193 unsigned long flags;
1194
1195 if (type != video->type)
1196 return -EINVAL;
1197
1198 mutex_lock(&video->stream_lock);
1199
1200 /* Make sure we're not streaming yet. */
1201 mutex_lock(&video->queue_lock);
1202 streaming = vb2_is_streaming(&vfh->queue);
1203 mutex_unlock(&video->queue_lock);
1204
1205 if (!streaming)
1206 goto done;
1207
1208 /* Update the pipeline state. */
1209 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1210 state = ISP_PIPELINE_STREAM_OUTPUT
1211 | ISP_PIPELINE_QUEUE_OUTPUT;
1212 else
1213 state = ISP_PIPELINE_STREAM_INPUT
1214 | ISP_PIPELINE_QUEUE_INPUT;
1215
1216 spin_lock_irqsave(&pipe->lock, flags);
1217 pipe->state &= ~state;
1218 spin_unlock_irqrestore(&pipe->lock, flags);
1219
1220 /* Stop the stream. */
1221 omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1222 omap3isp_video_cancel_stream(video);
1223
1224 mutex_lock(&video->queue_lock);
1225 vb2_streamoff(&vfh->queue, type);
1226 mutex_unlock(&video->queue_lock);
1227 video->queue = NULL;
1228 video->error = false;
1229
1230 /* TODO: Implement PM QoS */
1231 media_pipeline_stop(&video->video.entity);
1232
1233 media_entity_enum_cleanup(&pipe->ent_enum);
1234
1235 done:
1236 mutex_unlock(&video->stream_lock);
1237 return 0;
1238 }
1239
1240 static int
1241 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1242 {
1243 if (input->index > 0)
1244 return -EINVAL;
1245
1246 strscpy(input->name, "camera", sizeof(input->name));
1247 input->type = V4L2_INPUT_TYPE_CAMERA;
1248
1249 return 0;
1250 }
1251
1252 static int
1253 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1254 {
1255 *input = 0;
1256
1257 return 0;
1258 }
1259
1260 static int
1261 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1262 {
1263 return input == 0 ? 0 : -EINVAL;
1264 }
1265
1266 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1267 .vidioc_querycap = isp_video_querycap,
1268 .vidioc_g_fmt_vid_cap = isp_video_get_format,
1269 .vidioc_s_fmt_vid_cap = isp_video_set_format,
1270 .vidioc_try_fmt_vid_cap = isp_video_try_format,
1271 .vidioc_g_fmt_vid_out = isp_video_get_format,
1272 .vidioc_s_fmt_vid_out = isp_video_set_format,
1273 .vidioc_try_fmt_vid_out = isp_video_try_format,
1274 .vidioc_g_selection = isp_video_get_selection,
1275 .vidioc_s_selection = isp_video_set_selection,
1276 .vidioc_g_parm = isp_video_get_param,
1277 .vidioc_s_parm = isp_video_set_param,
1278 .vidioc_reqbufs = isp_video_reqbufs,
1279 .vidioc_querybuf = isp_video_querybuf,
1280 .vidioc_qbuf = isp_video_qbuf,
1281 .vidioc_dqbuf = isp_video_dqbuf,
1282 .vidioc_streamon = isp_video_streamon,
1283 .vidioc_streamoff = isp_video_streamoff,
1284 .vidioc_enum_input = isp_video_enum_input,
1285 .vidioc_g_input = isp_video_g_input,
1286 .vidioc_s_input = isp_video_s_input,
1287 };
1288
1289 /* -----------------------------------------------------------------------------
1290 * V4L2 file operations
1291 */
1292
1293 static int isp_video_open(struct file *file)
1294 {
1295 struct isp_video *video = video_drvdata(file);
1296 struct isp_video_fh *handle;
1297 struct vb2_queue *queue;
1298 int ret = 0;
1299
1300 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1301 if (handle == NULL)
1302 return -ENOMEM;
1303
1304 v4l2_fh_init(&handle->vfh, &video->video);
1305 v4l2_fh_add(&handle->vfh);
1306
1307 /* If this is the first user, initialise the pipeline. */
1308 if (omap3isp_get(video->isp) == NULL) {
1309 ret = -EBUSY;
1310 goto done;
1311 }
1312
1313 ret = v4l2_pipeline_pm_get(&video->video.entity);
1314 if (ret < 0) {
1315 omap3isp_put(video->isp);
1316 goto done;
1317 }
1318
1319 queue = &handle->queue;
1320 queue->type = video->type;
1321 queue->io_modes = VB2_MMAP | VB2_USERPTR;
1322 queue->drv_priv = handle;
1323 queue->ops = &isp_video_queue_ops;
1324 queue->mem_ops = &vb2_dma_contig_memops;
1325 queue->buf_struct_size = sizeof(struct isp_buffer);
1326 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1327 queue->dev = video->isp->dev;
1328
1329 ret = vb2_queue_init(&handle->queue);
1330 if (ret < 0) {
1331 omap3isp_put(video->isp);
1332 goto done;
1333 }
1334
1335 memset(&handle->format, 0, sizeof(handle->format));
1336 handle->format.type = video->type;
1337 handle->timeperframe.denominator = 1;
1338
1339 handle->video = video;
1340 file->private_data = &handle->vfh;
1341
1342 done:
1343 if (ret < 0) {
1344 v4l2_fh_del(&handle->vfh);
1345 v4l2_fh_exit(&handle->vfh);
1346 kfree(handle);
1347 }
1348
1349 return ret;
1350 }
1351
1352 static int isp_video_release(struct file *file)
1353 {
1354 struct isp_video *video = video_drvdata(file);
1355 struct v4l2_fh *vfh = file->private_data;
1356 struct isp_video_fh *handle = to_isp_video_fh(vfh);
1357
1358 /* Disable streaming and free the buffers queue resources. */
1359 isp_video_streamoff(file, vfh, video->type);
1360
1361 mutex_lock(&video->queue_lock);
1362 vb2_queue_release(&handle->queue);
1363 mutex_unlock(&video->queue_lock);
1364
1365 v4l2_pipeline_pm_put(&video->video.entity);
1366
1367 /* Release the file handle. */
1368 v4l2_fh_del(vfh);
1369 v4l2_fh_exit(vfh);
1370 kfree(handle);
1371 file->private_data = NULL;
1372
1373 omap3isp_put(video->isp);
1374
1375 return 0;
1376 }
1377
1378 static __poll_t isp_video_poll(struct file *file, poll_table *wait)
1379 {
1380 struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1381 struct isp_video *video = video_drvdata(file);
1382 __poll_t ret;
1383
1384 mutex_lock(&video->queue_lock);
1385 ret = vb2_poll(&vfh->queue, file, wait);
1386 mutex_unlock(&video->queue_lock);
1387
1388 return ret;
1389 }
1390
1391 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1392 {
1393 struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1394
1395 return vb2_mmap(&vfh->queue, vma);
1396 }
1397
1398 static const struct v4l2_file_operations isp_video_fops = {
1399 .owner = THIS_MODULE,
1400 .unlocked_ioctl = video_ioctl2,
1401 .open = isp_video_open,
1402 .release = isp_video_release,
1403 .poll = isp_video_poll,
1404 .mmap = isp_video_mmap,
1405 };
1406
1407 /* -----------------------------------------------------------------------------
1408 * ISP video core
1409 */
1410
1411 static const struct isp_video_operations isp_video_dummy_ops = {
1412 };
1413
1414 int omap3isp_video_init(struct isp_video *video, const char *name)
1415 {
1416 const char *direction;
1417 int ret;
1418
1419 switch (video->type) {
1420 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1421 direction = "output";
1422 video->pad.flags = MEDIA_PAD_FL_SINK
1423 | MEDIA_PAD_FL_MUST_CONNECT;
1424 break;
1425 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1426 direction = "input";
1427 video->pad.flags = MEDIA_PAD_FL_SOURCE
1428 | MEDIA_PAD_FL_MUST_CONNECT;
1429 video->video.vfl_dir = VFL_DIR_TX;
1430 break;
1431
1432 default:
1433 return -EINVAL;
1434 }
1435
1436 ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1437 if (ret < 0)
1438 return ret;
1439
1440 mutex_init(&video->mutex);
1441 atomic_set(&video->active, 0);
1442
1443 spin_lock_init(&video->pipe.lock);
1444 mutex_init(&video->stream_lock);
1445 mutex_init(&video->queue_lock);
1446 spin_lock_init(&video->irqlock);
1447
1448 /* Initialize the video device. */
1449 if (video->ops == NULL)
1450 video->ops = &isp_video_dummy_ops;
1451
1452 video->video.fops = &isp_video_fops;
1453 snprintf(video->video.name, sizeof(video->video.name),
1454 "OMAP3 ISP %s %s", name, direction);
1455 video->video.vfl_type = VFL_TYPE_VIDEO;
1456 video->video.release = video_device_release_empty;
1457 video->video.ioctl_ops = &isp_video_ioctl_ops;
1458 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1459 video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE
1460 | V4L2_CAP_STREAMING;
1461 else
1462 video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT
1463 | V4L2_CAP_STREAMING;
1464
1465 video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1466
1467 video_set_drvdata(&video->video, video);
1468
1469 return 0;
1470 }
1471
1472 void omap3isp_video_cleanup(struct isp_video *video)
1473 {
1474 media_entity_cleanup(&video->video.entity);
1475 mutex_destroy(&video->queue_lock);
1476 mutex_destroy(&video->stream_lock);
1477 mutex_destroy(&video->mutex);
1478 }
1479
1480 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1481 {
1482 int ret;
1483
1484 video->video.v4l2_dev = vdev;
1485
1486 ret = video_register_device(&video->video, VFL_TYPE_VIDEO, -1);
1487 if (ret < 0)
1488 dev_err(video->isp->dev,
1489 "%s: could not register video device (%d)\n",
1490 __func__, ret);
1491
1492 return ret;
1493 }
1494
1495 void omap3isp_video_unregister(struct isp_video *video)
1496 {
1497 video_unregister_device(&video->video);
1498 }
Linux with added FPC-III support