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7#include <linux/delay.h>
8#include <linux/fs.h>
9#include <linux/module.h>
10#include <linux/of_platform.h>
11#include <linux/pinctrl/consumer.h>
12#include <linux/platform_device.h>
13#include <linux/sched.h>
14#include <linux/slab.h>
15#include <linux/spinlock.h>
16#include <linux/timer.h>
17#include <media/v4l2-ctrls.h>
18#include <media/v4l2-device.h>
19#include <media/v4l2-event.h>
20#include <media/v4l2-fwnode.h>
21#include <media/v4l2-ioctl.h>
22#include <media/v4l2-mc.h>
23#include <media/v4l2-subdev.h>
24#include <media/videobuf2-dma-contig.h>
25#include <video/imx-ipu-v3.h>
26#include <media/imx.h>
27#include "imx-media.h"
28
29#define IMX_CAPTURE_NAME "imx-capture"
30
31struct capture_priv {
32 struct imx_media_dev *md;
33 struct device *dev;
34
35 struct imx_media_video_dev vdev;
36 struct media_pad vdev_pad;
37
38 struct v4l2_subdev *src_sd;
39 int src_sd_pad;
40
41 struct mutex mutex;
42
43 struct vb2_queue q;
44 struct list_head ready_q;
45 spinlock_t q_lock;
46
47 struct v4l2_ctrl_handler ctrl_hdlr;
48
49 bool legacy_api;
50};
51
52#define to_capture_priv(v) container_of(v, struct capture_priv, vdev)
53
54
55#define VID_MEM_LIMIT SZ_64M
56
57
58
59
60
61static const struct imx_media_pixfmt *capture_find_format(u32 code, u32 fourcc)
62{
63 const struct imx_media_pixfmt *cc;
64
65 cc = imx_media_find_ipu_format(code, PIXFMT_SEL_YUV_RGB);
66 if (cc) {
67 enum imx_pixfmt_sel fmt_sel = cc->cs == IPUV3_COLORSPACE_YUV
68 ? PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
69
70 cc = imx_media_find_pixel_format(fourcc, fmt_sel);
71 if (!cc) {
72 imx_media_enum_pixel_formats(&fourcc, 0, fmt_sel, 0);
73 cc = imx_media_find_pixel_format(fourcc, fmt_sel);
74 }
75
76 return cc;
77 }
78
79 return imx_media_find_mbus_format(code, PIXFMT_SEL_ANY);
80}
81
82static int capture_querycap(struct file *file, void *fh,
83 struct v4l2_capability *cap)
84{
85 struct capture_priv *priv = video_drvdata(file);
86
87 strscpy(cap->driver, IMX_CAPTURE_NAME, sizeof(cap->driver));
88 strscpy(cap->card, IMX_CAPTURE_NAME, sizeof(cap->card));
89 snprintf(cap->bus_info, sizeof(cap->bus_info),
90 "platform:%s", dev_name(priv->dev));
91
92 return 0;
93}
94
95static int capture_enum_fmt_vid_cap(struct file *file, void *fh,
96 struct v4l2_fmtdesc *f)
97{
98 return imx_media_enum_pixel_formats(&f->pixelformat, f->index,
99 PIXFMT_SEL_ANY, f->mbus_code);
100}
101
102static int capture_enum_framesizes(struct file *file, void *fh,
103 struct v4l2_frmsizeenum *fsize)
104{
105 const struct imx_media_pixfmt *cc;
106
107 if (fsize->index > 0)
108 return -EINVAL;
109
110 cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY);
111 if (!cc)
112 return -EINVAL;
113
114
115
116
117
118
119 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
120 fsize->stepwise.min_width = 1;
121 fsize->stepwise.max_width = 65535;
122 fsize->stepwise.min_height = 1;
123 fsize->stepwise.max_height = 65535;
124 fsize->stepwise.step_width = 1;
125 fsize->stepwise.step_height = 1;
126
127 return 0;
128}
129
130static int capture_g_fmt_vid_cap(struct file *file, void *fh,
131 struct v4l2_format *f)
132{
133 struct capture_priv *priv = video_drvdata(file);
134
135 f->fmt.pix = priv->vdev.fmt;
136
137 return 0;
138}
139
140static const struct imx_media_pixfmt *
141__capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose)
142{
143 struct v4l2_mbus_framefmt fmt_src;
144 const struct imx_media_pixfmt *cc;
145
146
147
148
149
150 cc = imx_media_find_pixel_format(pixfmt->pixelformat, PIXFMT_SEL_ANY);
151 if (!cc) {
152 imx_media_enum_pixel_formats(&pixfmt->pixelformat, 0,
153 PIXFMT_SEL_ANY, 0);
154 cc = imx_media_find_pixel_format(pixfmt->pixelformat,
155 PIXFMT_SEL_ANY);
156 }
157
158
159 if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) {
160 switch (pixfmt->field) {
161 case V4L2_FIELD_SEQ_TB:
162 pixfmt->field = V4L2_FIELD_INTERLACED_TB;
163 break;
164 case V4L2_FIELD_SEQ_BT:
165 pixfmt->field = V4L2_FIELD_INTERLACED_BT;
166 break;
167 default:
168 break;
169 }
170 }
171
172 v4l2_fill_mbus_format(&fmt_src, pixfmt, 0);
173 imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src, cc);
174
175 if (compose) {
176 compose->width = fmt_src.width;
177 compose->height = fmt_src.height;
178 }
179
180 return cc;
181}
182
183static int capture_try_fmt_vid_cap(struct file *file, void *fh,
184 struct v4l2_format *f)
185{
186 __capture_try_fmt(&f->fmt.pix, NULL);
187 return 0;
188}
189
190static int capture_s_fmt_vid_cap(struct file *file, void *fh,
191 struct v4l2_format *f)
192{
193 struct capture_priv *priv = video_drvdata(file);
194 const struct imx_media_pixfmt *cc;
195
196 if (vb2_is_busy(&priv->q)) {
197 dev_err(priv->dev, "%s queue busy\n", __func__);
198 return -EBUSY;
199 }
200
201 cc = __capture_try_fmt(&f->fmt.pix, &priv->vdev.compose);
202
203 priv->vdev.cc = cc;
204 priv->vdev.fmt = f->fmt.pix;
205
206 return 0;
207}
208
209static int capture_g_selection(struct file *file, void *fh,
210 struct v4l2_selection *s)
211{
212 struct capture_priv *priv = video_drvdata(file);
213
214 switch (s->target) {
215 case V4L2_SEL_TGT_COMPOSE:
216 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
217 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
218
219 s->r = priv->vdev.compose;
220 break;
221 case V4L2_SEL_TGT_COMPOSE_PADDED:
222
223
224
225
226
227 s->r.left = 0;
228 s->r.top = 0;
229 s->r.width = priv->vdev.fmt.width;
230 s->r.height = priv->vdev.fmt.height;
231 break;
232 default:
233 return -EINVAL;
234 }
235
236 return 0;
237}
238
239static int capture_subscribe_event(struct v4l2_fh *fh,
240 const struct v4l2_event_subscription *sub)
241{
242 switch (sub->type) {
243 case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR:
244 return v4l2_event_subscribe(fh, sub, 0, NULL);
245 default:
246 return -EINVAL;
247 }
248}
249
250static const struct v4l2_ioctl_ops capture_ioctl_ops = {
251 .vidioc_querycap = capture_querycap,
252
253 .vidioc_enum_fmt_vid_cap = capture_enum_fmt_vid_cap,
254 .vidioc_enum_framesizes = capture_enum_framesizes,
255
256 .vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap,
257 .vidioc_try_fmt_vid_cap = capture_try_fmt_vid_cap,
258 .vidioc_s_fmt_vid_cap = capture_s_fmt_vid_cap,
259
260 .vidioc_g_selection = capture_g_selection,
261
262 .vidioc_reqbufs = vb2_ioctl_reqbufs,
263 .vidioc_create_bufs = vb2_ioctl_create_bufs,
264 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
265 .vidioc_querybuf = vb2_ioctl_querybuf,
266 .vidioc_qbuf = vb2_ioctl_qbuf,
267 .vidioc_dqbuf = vb2_ioctl_dqbuf,
268 .vidioc_expbuf = vb2_ioctl_expbuf,
269 .vidioc_streamon = vb2_ioctl_streamon,
270 .vidioc_streamoff = vb2_ioctl_streamoff,
271
272 .vidioc_subscribe_event = capture_subscribe_event,
273 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
274};
275
276
277
278
279
280static int capture_legacy_enum_framesizes(struct file *file, void *fh,
281 struct v4l2_frmsizeenum *fsize)
282{
283 struct capture_priv *priv = video_drvdata(file);
284 const struct imx_media_pixfmt *cc;
285 struct v4l2_subdev_frame_size_enum fse = {
286 .index = fsize->index,
287 .pad = priv->src_sd_pad,
288 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
289 };
290 int ret;
291
292 cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY);
293 if (!cc)
294 return -EINVAL;
295
296 fse.code = cc->codes ? cc->codes[0] : 0;
297
298 ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_size, NULL, &fse);
299 if (ret)
300 return ret;
301
302 if (fse.min_width == fse.max_width &&
303 fse.min_height == fse.max_height) {
304 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
305 fsize->discrete.width = fse.min_width;
306 fsize->discrete.height = fse.min_height;
307 } else {
308 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
309 fsize->stepwise.min_width = fse.min_width;
310 fsize->stepwise.max_width = fse.max_width;
311 fsize->stepwise.min_height = fse.min_height;
312 fsize->stepwise.max_height = fse.max_height;
313 fsize->stepwise.step_width = 1;
314 fsize->stepwise.step_height = 1;
315 }
316
317 return 0;
318}
319
320static int capture_legacy_enum_frameintervals(struct file *file, void *fh,
321 struct v4l2_frmivalenum *fival)
322{
323 struct capture_priv *priv = video_drvdata(file);
324 const struct imx_media_pixfmt *cc;
325 struct v4l2_subdev_frame_interval_enum fie = {
326 .index = fival->index,
327 .pad = priv->src_sd_pad,
328 .width = fival->width,
329 .height = fival->height,
330 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
331 };
332 int ret;
333
334 cc = imx_media_find_pixel_format(fival->pixel_format, PIXFMT_SEL_ANY);
335 if (!cc)
336 return -EINVAL;
337
338 fie.code = cc->codes ? cc->codes[0] : 0;
339
340 ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_interval,
341 NULL, &fie);
342 if (ret)
343 return ret;
344
345 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
346 fival->discrete = fie.interval;
347
348 return 0;
349}
350
351static int capture_legacy_enum_fmt_vid_cap(struct file *file, void *fh,
352 struct v4l2_fmtdesc *f)
353{
354 struct capture_priv *priv = video_drvdata(file);
355 const struct imx_media_pixfmt *cc_src;
356 struct v4l2_subdev_format fmt_src;
357 u32 fourcc;
358 int ret;
359
360 fmt_src.pad = priv->src_sd_pad;
361 fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
362 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
363 if (ret) {
364 dev_err(priv->dev, "failed to get src_sd format\n");
365 return ret;
366 }
367
368 cc_src = imx_media_find_ipu_format(fmt_src.format.code,
369 PIXFMT_SEL_YUV_RGB);
370 if (cc_src) {
371 enum imx_pixfmt_sel fmt_sel =
372 (cc_src->cs == IPUV3_COLORSPACE_YUV) ?
373 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
374
375 ret = imx_media_enum_pixel_formats(&fourcc, f->index, fmt_sel,
376 0);
377 if (ret)
378 return ret;
379 } else {
380 cc_src = imx_media_find_mbus_format(fmt_src.format.code,
381 PIXFMT_SEL_ANY);
382 if (WARN_ON(!cc_src))
383 return -EINVAL;
384
385 if (f->index != 0)
386 return -EINVAL;
387 fourcc = cc_src->fourcc;
388 }
389
390 f->pixelformat = fourcc;
391
392 return 0;
393}
394
395static const struct imx_media_pixfmt *
396__capture_legacy_try_fmt(struct capture_priv *priv,
397 struct v4l2_subdev_format *fmt_src,
398 struct v4l2_pix_format *pixfmt)
399{
400 const struct imx_media_pixfmt *cc;
401
402 cc = capture_find_format(fmt_src->format.code, pixfmt->pixelformat);
403 if (WARN_ON(!cc))
404 return NULL;
405
406
407 if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) {
408 switch (fmt_src->format.field) {
409 case V4L2_FIELD_SEQ_TB:
410 fmt_src->format.field = V4L2_FIELD_INTERLACED_TB;
411 break;
412 case V4L2_FIELD_SEQ_BT:
413 fmt_src->format.field = V4L2_FIELD_INTERLACED_BT;
414 break;
415 default:
416 break;
417 }
418 }
419
420 imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src->format, cc);
421
422 return cc;
423}
424
425static int capture_legacy_try_fmt_vid_cap(struct file *file, void *fh,
426 struct v4l2_format *f)
427{
428 struct capture_priv *priv = video_drvdata(file);
429 struct v4l2_subdev_format fmt_src;
430 int ret;
431
432 fmt_src.pad = priv->src_sd_pad;
433 fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
434 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
435 if (ret)
436 return ret;
437
438 if (!__capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix))
439 return -EINVAL;
440
441 return 0;
442}
443
444static int capture_legacy_s_fmt_vid_cap(struct file *file, void *fh,
445 struct v4l2_format *f)
446{
447 struct capture_priv *priv = video_drvdata(file);
448 struct v4l2_subdev_format fmt_src;
449 const struct imx_media_pixfmt *cc;
450 int ret;
451
452 if (vb2_is_busy(&priv->q)) {
453 dev_err(priv->dev, "%s queue busy\n", __func__);
454 return -EBUSY;
455 }
456
457 fmt_src.pad = priv->src_sd_pad;
458 fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
459 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
460 if (ret)
461 return ret;
462
463 cc = __capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix);
464 if (!cc)
465 return -EINVAL;
466
467 priv->vdev.cc = cc;
468 priv->vdev.fmt = f->fmt.pix;
469 priv->vdev.compose.width = fmt_src.format.width;
470 priv->vdev.compose.height = fmt_src.format.height;
471
472 return 0;
473}
474
475static int capture_legacy_querystd(struct file *file, void *fh,
476 v4l2_std_id *std)
477{
478 struct capture_priv *priv = video_drvdata(file);
479
480 return v4l2_subdev_call(priv->src_sd, video, querystd, std);
481}
482
483static int capture_legacy_g_std(struct file *file, void *fh, v4l2_std_id *std)
484{
485 struct capture_priv *priv = video_drvdata(file);
486
487 return v4l2_subdev_call(priv->src_sd, video, g_std, std);
488}
489
490static int capture_legacy_s_std(struct file *file, void *fh, v4l2_std_id std)
491{
492 struct capture_priv *priv = video_drvdata(file);
493
494 if (vb2_is_busy(&priv->q))
495 return -EBUSY;
496
497 return v4l2_subdev_call(priv->src_sd, video, s_std, std);
498}
499
500static int capture_legacy_g_parm(struct file *file, void *fh,
501 struct v4l2_streamparm *a)
502{
503 struct capture_priv *priv = video_drvdata(file);
504 struct v4l2_subdev_frame_interval fi;
505 int ret;
506
507 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
508 return -EINVAL;
509
510 memset(&fi, 0, sizeof(fi));
511 fi.pad = priv->src_sd_pad;
512 ret = v4l2_subdev_call(priv->src_sd, video, g_frame_interval, &fi);
513 if (ret < 0)
514 return ret;
515
516 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
517 a->parm.capture.timeperframe = fi.interval;
518
519 return 0;
520}
521
522static int capture_legacy_s_parm(struct file *file, void *fh,
523 struct v4l2_streamparm *a)
524{
525 struct capture_priv *priv = video_drvdata(file);
526 struct v4l2_subdev_frame_interval fi;
527 int ret;
528
529 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
530 return -EINVAL;
531
532 memset(&fi, 0, sizeof(fi));
533 fi.pad = priv->src_sd_pad;
534 fi.interval = a->parm.capture.timeperframe;
535 ret = v4l2_subdev_call(priv->src_sd, video, s_frame_interval, &fi);
536 if (ret < 0)
537 return ret;
538
539 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
540 a->parm.capture.timeperframe = fi.interval;
541
542 return 0;
543}
544
545static int capture_legacy_subscribe_event(struct v4l2_fh *fh,
546 const struct v4l2_event_subscription *sub)
547{
548 switch (sub->type) {
549 case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR:
550 return v4l2_event_subscribe(fh, sub, 0, NULL);
551 case V4L2_EVENT_SOURCE_CHANGE:
552 return v4l2_src_change_event_subscribe(fh, sub);
553 case V4L2_EVENT_CTRL:
554 return v4l2_ctrl_subscribe_event(fh, sub);
555 default:
556 return -EINVAL;
557 }
558}
559
560static const struct v4l2_ioctl_ops capture_legacy_ioctl_ops = {
561 .vidioc_querycap = capture_querycap,
562
563 .vidioc_enum_framesizes = capture_legacy_enum_framesizes,
564 .vidioc_enum_frameintervals = capture_legacy_enum_frameintervals,
565
566 .vidioc_enum_fmt_vid_cap = capture_legacy_enum_fmt_vid_cap,
567 .vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap,
568 .vidioc_try_fmt_vid_cap = capture_legacy_try_fmt_vid_cap,
569 .vidioc_s_fmt_vid_cap = capture_legacy_s_fmt_vid_cap,
570
571 .vidioc_querystd = capture_legacy_querystd,
572 .vidioc_g_std = capture_legacy_g_std,
573 .vidioc_s_std = capture_legacy_s_std,
574
575 .vidioc_g_selection = capture_g_selection,
576
577 .vidioc_g_parm = capture_legacy_g_parm,
578 .vidioc_s_parm = capture_legacy_s_parm,
579
580 .vidioc_reqbufs = vb2_ioctl_reqbufs,
581 .vidioc_create_bufs = vb2_ioctl_create_bufs,
582 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
583 .vidioc_querybuf = vb2_ioctl_querybuf,
584 .vidioc_qbuf = vb2_ioctl_qbuf,
585 .vidioc_dqbuf = vb2_ioctl_dqbuf,
586 .vidioc_expbuf = vb2_ioctl_expbuf,
587 .vidioc_streamon = vb2_ioctl_streamon,
588 .vidioc_streamoff = vb2_ioctl_streamoff,
589
590 .vidioc_subscribe_event = capture_legacy_subscribe_event,
591 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
592};
593
594
595
596
597
598static int capture_queue_setup(struct vb2_queue *vq,
599 unsigned int *nbuffers,
600 unsigned int *nplanes,
601 unsigned int sizes[],
602 struct device *alloc_devs[])
603{
604 struct capture_priv *priv = vb2_get_drv_priv(vq);
605 struct v4l2_pix_format *pix = &priv->vdev.fmt;
606 unsigned int count = *nbuffers;
607
608 if (vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
609 return -EINVAL;
610
611 if (*nplanes) {
612 if (*nplanes != 1 || sizes[0] < pix->sizeimage)
613 return -EINVAL;
614 count += vq->num_buffers;
615 }
616
617 count = min_t(__u32, VID_MEM_LIMIT / pix->sizeimage, count);
618
619 if (*nplanes)
620 *nbuffers = (count < vq->num_buffers) ? 0 :
621 count - vq->num_buffers;
622 else
623 *nbuffers = count;
624
625 *nplanes = 1;
626 sizes[0] = pix->sizeimage;
627
628 return 0;
629}
630
631static int capture_buf_init(struct vb2_buffer *vb)
632{
633 struct imx_media_buffer *buf = to_imx_media_vb(vb);
634
635 INIT_LIST_HEAD(&buf->list);
636
637 return 0;
638}
639
640static int capture_buf_prepare(struct vb2_buffer *vb)
641{
642 struct vb2_queue *vq = vb->vb2_queue;
643 struct capture_priv *priv = vb2_get_drv_priv(vq);
644 struct v4l2_pix_format *pix = &priv->vdev.fmt;
645
646 if (vb2_plane_size(vb, 0) < pix->sizeimage) {
647 dev_err(priv->dev,
648 "data will not fit into plane (%lu < %lu)\n",
649 vb2_plane_size(vb, 0), (long)pix->sizeimage);
650 return -EINVAL;
651 }
652
653 vb2_set_plane_payload(vb, 0, pix->sizeimage);
654
655 return 0;
656}
657
658static void capture_buf_queue(struct vb2_buffer *vb)
659{
660 struct capture_priv *priv = vb2_get_drv_priv(vb->vb2_queue);
661 struct imx_media_buffer *buf = to_imx_media_vb(vb);
662 unsigned long flags;
663
664 spin_lock_irqsave(&priv->q_lock, flags);
665
666 list_add_tail(&buf->list, &priv->ready_q);
667
668 spin_unlock_irqrestore(&priv->q_lock, flags);
669}
670
671static int capture_validate_fmt(struct capture_priv *priv)
672{
673 struct v4l2_subdev_format fmt_src;
674 const struct imx_media_pixfmt *cc;
675 int ret;
676
677
678 fmt_src.pad = priv->src_sd_pad;
679 fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
680 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
681 if (ret)
682 return ret;
683
684
685
686
687
688
689
690
691 if (priv->vdev.compose.width != fmt_src.format.width ||
692 priv->vdev.compose.height != fmt_src.format.height)
693 return -EPIPE;
694
695
696
697
698
699 cc = capture_find_format(fmt_src.format.code, 0);
700 if (!cc || priv->vdev.cc->cs != cc->cs)
701 return -EPIPE;
702
703 return 0;
704}
705
706static int capture_start_streaming(struct vb2_queue *vq, unsigned int count)
707{
708 struct capture_priv *priv = vb2_get_drv_priv(vq);
709 struct imx_media_buffer *buf, *tmp;
710 unsigned long flags;
711 int ret;
712
713 ret = capture_validate_fmt(priv);
714 if (ret) {
715 dev_err(priv->dev, "capture format not valid\n");
716 goto return_bufs;
717 }
718
719 ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
720 true);
721 if (ret) {
722 dev_err(priv->dev, "pipeline start failed with %d\n", ret);
723 goto return_bufs;
724 }
725
726 return 0;
727
728return_bufs:
729 spin_lock_irqsave(&priv->q_lock, flags);
730 list_for_each_entry_safe(buf, tmp, &priv->ready_q, list) {
731 list_del(&buf->list);
732 vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED);
733 }
734 spin_unlock_irqrestore(&priv->q_lock, flags);
735 return ret;
736}
737
738static void capture_stop_streaming(struct vb2_queue *vq)
739{
740 struct capture_priv *priv = vb2_get_drv_priv(vq);
741 struct imx_media_buffer *frame;
742 struct imx_media_buffer *tmp;
743 unsigned long flags;
744 int ret;
745
746 ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
747 false);
748 if (ret)
749 dev_warn(priv->dev, "pipeline stop failed with %d\n", ret);
750
751
752 spin_lock_irqsave(&priv->q_lock, flags);
753 list_for_each_entry_safe(frame, tmp, &priv->ready_q, list) {
754 list_del(&frame->list);
755 vb2_buffer_done(&frame->vbuf.vb2_buf, VB2_BUF_STATE_ERROR);
756 }
757 spin_unlock_irqrestore(&priv->q_lock, flags);
758}
759
760static const struct vb2_ops capture_qops = {
761 .queue_setup = capture_queue_setup,
762 .buf_init = capture_buf_init,
763 .buf_prepare = capture_buf_prepare,
764 .buf_queue = capture_buf_queue,
765 .wait_prepare = vb2_ops_wait_prepare,
766 .wait_finish = vb2_ops_wait_finish,
767 .start_streaming = capture_start_streaming,
768 .stop_streaming = capture_stop_streaming,
769};
770
771
772
773
774
775static int capture_open(struct file *file)
776{
777 struct capture_priv *priv = video_drvdata(file);
778 struct video_device *vfd = priv->vdev.vfd;
779 int ret;
780
781 if (mutex_lock_interruptible(&priv->mutex))
782 return -ERESTARTSYS;
783
784 ret = v4l2_fh_open(file);
785 if (ret) {
786 dev_err(priv->dev, "v4l2_fh_open failed\n");
787 goto out;
788 }
789
790 ret = v4l2_pipeline_pm_get(&vfd->entity);
791 if (ret)
792 v4l2_fh_release(file);
793
794out:
795 mutex_unlock(&priv->mutex);
796 return ret;
797}
798
799static int capture_release(struct file *file)
800{
801 struct capture_priv *priv = video_drvdata(file);
802 struct video_device *vfd = priv->vdev.vfd;
803 struct vb2_queue *vq = &priv->q;
804
805 mutex_lock(&priv->mutex);
806
807 if (file->private_data == vq->owner) {
808 vb2_queue_release(vq);
809 vq->owner = NULL;
810 }
811
812 v4l2_pipeline_pm_put(&vfd->entity);
813
814 v4l2_fh_release(file);
815 mutex_unlock(&priv->mutex);
816 return 0;
817}
818
819static const struct v4l2_file_operations capture_fops = {
820 .owner = THIS_MODULE,
821 .open = capture_open,
822 .release = capture_release,
823 .poll = vb2_fop_poll,
824 .unlocked_ioctl = video_ioctl2,
825 .mmap = vb2_fop_mmap,
826};
827
828
829
830
831
832struct imx_media_buffer *
833imx_media_capture_device_next_buf(struct imx_media_video_dev *vdev)
834{
835 struct capture_priv *priv = to_capture_priv(vdev);
836 struct imx_media_buffer *buf = NULL;
837 unsigned long flags;
838
839 spin_lock_irqsave(&priv->q_lock, flags);
840
841
842 if (!list_empty(&priv->ready_q)) {
843 buf = list_entry(priv->ready_q.next, struct imx_media_buffer,
844 list);
845 list_del(&buf->list);
846 }
847
848 spin_unlock_irqrestore(&priv->q_lock, flags);
849
850 return buf;
851}
852EXPORT_SYMBOL_GPL(imx_media_capture_device_next_buf);
853
854void imx_media_capture_device_error(struct imx_media_video_dev *vdev)
855{
856 struct capture_priv *priv = to_capture_priv(vdev);
857 struct vb2_queue *vq = &priv->q;
858 unsigned long flags;
859
860 if (!vb2_is_streaming(vq))
861 return;
862
863 spin_lock_irqsave(&priv->q_lock, flags);
864 vb2_queue_error(vq);
865 spin_unlock_irqrestore(&priv->q_lock, flags);
866}
867EXPORT_SYMBOL_GPL(imx_media_capture_device_error);
868
869static int capture_init_format(struct capture_priv *priv)
870{
871 struct v4l2_subdev_format fmt_src = {
872 .pad = priv->src_sd_pad,
873 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
874 };
875 struct imx_media_video_dev *vdev = &priv->vdev;
876 int ret;
877
878 if (priv->legacy_api) {
879 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL,
880 &fmt_src);
881 if (ret) {
882 dev_err(priv->dev, "failed to get source format\n");
883 return ret;
884 }
885 } else {
886 fmt_src.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
887 fmt_src.format.width = IMX_MEDIA_DEF_PIX_WIDTH;
888 fmt_src.format.height = IMX_MEDIA_DEF_PIX_HEIGHT;
889 }
890
891 imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt, &fmt_src.format, NULL);
892 vdev->compose.width = fmt_src.format.width;
893 vdev->compose.height = fmt_src.format.height;
894
895 vdev->cc = imx_media_find_pixel_format(vdev->fmt.pixelformat,
896 PIXFMT_SEL_ANY);
897
898 return 0;
899}
900
901int imx_media_capture_device_register(struct imx_media_video_dev *vdev,
902 u32 link_flags)
903{
904 struct capture_priv *priv = to_capture_priv(vdev);
905 struct v4l2_subdev *sd = priv->src_sd;
906 struct v4l2_device *v4l2_dev = sd->v4l2_dev;
907 struct video_device *vfd = vdev->vfd;
908 int ret;
909
910
911 priv->md = container_of(v4l2_dev->mdev, struct imx_media_dev, md);
912
913 vfd->v4l2_dev = v4l2_dev;
914
915
916 ret = capture_init_format(priv);
917 if (ret < 0)
918 return ret;
919
920
921 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
922 if (ret) {
923 dev_err(priv->dev, "Failed to register video device\n");
924 return ret;
925 }
926
927 dev_info(priv->dev, "Registered %s as /dev/%s\n", vfd->name,
928 video_device_node_name(vfd));
929
930
931 if (link_flags & MEDIA_LNK_FL_IMMUTABLE)
932 link_flags |= MEDIA_LNK_FL_ENABLED;
933 ret = media_create_pad_link(&sd->entity, priv->src_sd_pad,
934 &vfd->entity, 0, link_flags);
935 if (ret) {
936 dev_err(priv->dev, "failed to create link to device node\n");
937 video_unregister_device(vfd);
938 return ret;
939 }
940
941
942 imx_media_add_video_device(priv->md, vdev);
943
944 return 0;
945}
946EXPORT_SYMBOL_GPL(imx_media_capture_device_register);
947
948void imx_media_capture_device_unregister(struct imx_media_video_dev *vdev)
949{
950 struct capture_priv *priv = to_capture_priv(vdev);
951 struct video_device *vfd = priv->vdev.vfd;
952
953 media_entity_cleanup(&vfd->entity);
954 video_unregister_device(vfd);
955}
956EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister);
957
958struct imx_media_video_dev *
959imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
960 int pad, bool legacy_api)
961{
962 struct capture_priv *priv;
963 struct video_device *vfd;
964 struct vb2_queue *vq;
965 int ret;
966
967 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
968 if (!priv)
969 return ERR_PTR(-ENOMEM);
970
971 priv->src_sd = src_sd;
972 priv->src_sd_pad = pad;
973 priv->dev = dev;
974 priv->legacy_api = legacy_api;
975
976 mutex_init(&priv->mutex);
977 INIT_LIST_HEAD(&priv->ready_q);
978 spin_lock_init(&priv->q_lock);
979
980
981 vfd = video_device_alloc();
982 if (!vfd)
983 return ERR_PTR(-ENOMEM);
984
985 vfd->fops = &capture_fops;
986 vfd->ioctl_ops = legacy_api ? &capture_legacy_ioctl_ops
987 : &capture_ioctl_ops;
988 vfd->minor = -1;
989 vfd->release = video_device_release;
990 vfd->vfl_dir = VFL_DIR_RX;
991 vfd->tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
992 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
993 | (!legacy_api ? V4L2_CAP_IO_MC : 0);
994 vfd->lock = &priv->mutex;
995 vfd->queue = &priv->q;
996
997 snprintf(vfd->name, sizeof(vfd->name), "%s capture", src_sd->name);
998
999 video_set_drvdata(vfd, priv);
1000 priv->vdev.vfd = vfd;
1001 INIT_LIST_HEAD(&priv->vdev.list);
1002
1003
1004 priv->vdev_pad.flags = MEDIA_PAD_FL_SINK;
1005 ret = media_entity_pads_init(&vfd->entity, 1, &priv->vdev_pad);
1006 if (ret) {
1007 video_device_release(vfd);
1008 return ERR_PTR(ret);
1009 }
1010
1011
1012 vq = &priv->q;
1013 vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1014 vq->io_modes = VB2_MMAP | VB2_DMABUF;
1015 vq->drv_priv = priv;
1016 vq->buf_struct_size = sizeof(struct imx_media_buffer);
1017 vq->ops = &capture_qops;
1018 vq->mem_ops = &vb2_dma_contig_memops;
1019 vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1020 vq->lock = &priv->mutex;
1021 vq->min_buffers_needed = 2;
1022 vq->dev = priv->dev;
1023
1024 ret = vb2_queue_init(vq);
1025 if (ret) {
1026 dev_err(priv->dev, "vb2_queue_init failed\n");
1027 video_device_release(vfd);
1028 return ERR_PTR(ret);
1029 }
1030
1031 if (legacy_api) {
1032
1033 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1034 vfd->ctrl_handler = &priv->ctrl_hdlr;
1035 }
1036
1037 return &priv->vdev;
1038}
1039EXPORT_SYMBOL_GPL(imx_media_capture_device_init);
1040
1041void imx_media_capture_device_remove(struct imx_media_video_dev *vdev)
1042{
1043 struct capture_priv *priv = to_capture_priv(vdev);
1044
1045 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1046}
1047EXPORT_SYMBOL_GPL(imx_media_capture_device_remove);
1048
1049MODULE_DESCRIPTION("i.MX5/6 v4l2 video capture interface driver");
1050MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
1051MODULE_LICENSE("GPL");
1052
