2 * Copyright (C) 2012 Texas Instruments Inc
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation version 2.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Manjunath Hadli <manjunath.hadli@ti.com>
19 * Prabhakar Lad <prabhakar.lad@ti.com>
22 #include <linux/module.h>
23 #include <linux/slab.h>
25 #include <media/v4l2-ioctl.h>
28 #include "vpfe_mc_capture.h"
32 /* get v4l2 subdev pointer to external subdev which is active */
33 static struct media_entity *vpfe_get_input_entity
34 (struct vpfe_video_device *video)
36 struct vpfe_device *vpfe_dev = video->vpfe_dev;
37 struct media_pad *remote;
39 remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]);
41 pr_err("Invalid media connection to isif/ccdc\n");
44 return remote->entity;
47 /* updates external subdev(sensor/decoder) which is active */
48 static int vpfe_update_current_ext_subdev(struct vpfe_video_device *video)
50 struct vpfe_device *vpfe_dev = video->vpfe_dev;
51 struct vpfe_config *vpfe_cfg;
52 struct v4l2_subdev *subdev;
53 struct media_pad *remote;
56 remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]);
58 pr_err("Invalid media connection to isif/ccdc\n");
62 subdev = media_entity_to_v4l2_subdev(remote->entity);
63 vpfe_cfg = vpfe_dev->pdev->platform_data;
64 for (i = 0; i < vpfe_cfg->num_subdevs; i++) {
65 if (!strcmp(vpfe_cfg->sub_devs[i].module_name, subdev->name)) {
66 video->current_ext_subdev = &vpfe_cfg->sub_devs[i];
71 /* if user not linked decoder/sensor to isif/ccdc */
72 if (i == vpfe_cfg->num_subdevs) {
73 pr_err("Invalid media chain connection to isif/ccdc\n");
76 /* find the v4l2 subdev pointer */
77 for (i = 0; i < vpfe_dev->num_ext_subdevs; i++) {
78 if (!strcmp(video->current_ext_subdev->module_name,
79 vpfe_dev->sd[i]->name))
80 video->current_ext_subdev->subdev = vpfe_dev->sd[i];
85 /* get the subdev which is connected to the output video node */
86 static struct v4l2_subdev *
87 vpfe_video_remote_subdev(struct vpfe_video_device *video, u32 *pad)
89 struct media_pad *remote = media_entity_remote_pad(&video->pad);
91 if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
95 return media_entity_to_v4l2_subdev(remote->entity);
98 /* get the format set at output pad of the adjacent subdev */
100 __vpfe_video_get_format(struct vpfe_video_device *video,
101 struct v4l2_format *format)
103 struct v4l2_subdev_format fmt;
104 struct v4l2_subdev *subdev;
105 struct media_pad *remote;
109 subdev = vpfe_video_remote_subdev(video, &pad);
113 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
114 remote = media_entity_remote_pad(&video->pad);
115 fmt.pad = remote->index;
117 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
118 if (ret == -ENOIOCTLCMD)
121 format->type = video->type;
122 /* convert mbus_format to v4l2_format */
123 v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
124 mbus_to_pix(&fmt.format, &format->fmt.pix);
129 /* make a note of pipeline details */
130 static int vpfe_prepare_pipeline(struct vpfe_video_device *video)
132 struct media_entity_graph graph;
133 struct media_entity *entity = &video->video_dev.entity;
134 struct media_device *mdev = entity->graph_obj.mdev;
135 struct vpfe_pipeline *pipe = &video->pipe;
136 struct vpfe_video_device *far_end = NULL;
140 pipe->output_num = 0;
142 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
143 pipe->inputs[pipe->input_num++] = video;
145 pipe->outputs[pipe->output_num++] = video;
147 mutex_lock(&mdev->graph_mutex);
148 ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev);
150 mutex_unlock(&mdev->graph_mutex);
153 media_entity_graph_walk_start(&graph, entity);
154 while ((entity = media_entity_graph_walk_next(&graph))) {
155 if (entity == &video->video_dev.entity)
157 if (!is_media_entity_v4l2_video_device(entity))
159 far_end = to_vpfe_video(media_entity_to_video_device(entity));
160 if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
161 pipe->inputs[pipe->input_num++] = far_end;
163 pipe->outputs[pipe->output_num++] = far_end;
165 media_entity_graph_walk_cleanup(&graph);
166 mutex_unlock(&mdev->graph_mutex);
171 /* update pipe state selected by user */
172 static int vpfe_update_pipe_state(struct vpfe_video_device *video)
174 struct vpfe_pipeline *pipe = &video->pipe;
177 ret = vpfe_prepare_pipeline(video);
182 * Find out if there is any input video
183 * if yes, it is single shot.
185 if (pipe->input_num == 0) {
186 pipe->state = VPFE_PIPELINE_STREAM_CONTINUOUS;
187 ret = vpfe_update_current_ext_subdev(video);
189 pr_err("Invalid external subdev\n");
193 pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT;
195 video->initialized = 1;
196 video->skip_frame_count = 1;
197 video->skip_frame_count_init = 1;
201 /* checks wether pipeline is ready for enabling */
202 int vpfe_video_is_pipe_ready(struct vpfe_pipeline *pipe)
206 for (i = 0; i < pipe->input_num; i++)
207 if (!pipe->inputs[i]->started ||
208 pipe->inputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED)
210 for (i = 0; i < pipe->output_num; i++)
211 if (!pipe->outputs[i]->started ||
212 pipe->outputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED)
218 * Validate a pipeline by checking both ends of all links for format
221 * Return 0 if all formats match, or -EPIPE if at least one link is found with
222 * different formats on its two ends.
224 static int vpfe_video_validate_pipeline(struct vpfe_pipeline *pipe)
226 struct v4l2_subdev_format fmt_source;
227 struct v4l2_subdev_format fmt_sink;
228 struct v4l2_subdev *subdev;
229 struct media_pad *pad;
233 * Should not matter if it is output[0] or 1 as
234 * the general ideas is to traverse backwards and
235 * the fact that the out video node always has the
236 * format of the connected pad.
238 subdev = vpfe_video_remote_subdev(pipe->outputs[0], NULL);
243 /* Retrieve the sink format */
244 pad = &subdev->entity.pads[0];
245 if (!(pad->flags & MEDIA_PAD_FL_SINK))
248 fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE;
249 fmt_sink.pad = pad->index;
250 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL,
253 if (ret < 0 && ret != -ENOIOCTLCMD)
256 /* Retrieve the source format */
257 pad = media_entity_remote_pad(pad);
258 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
261 subdev = media_entity_to_v4l2_subdev(pad->entity);
263 fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE;
264 fmt_source.pad = pad->index;
265 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source);
266 if (ret < 0 && ret != -ENOIOCTLCMD)
269 /* Check if the two ends match */
270 if (fmt_source.format.code != fmt_sink.format.code ||
271 fmt_source.format.width != fmt_sink.format.width ||
272 fmt_source.format.height != fmt_sink.format.height)
279 * vpfe_pipeline_enable() - Enable streaming on a pipeline
280 * @vpfe_dev: vpfe device
281 * @pipe: vpfe pipeline
283 * Walk the entities chain starting at the pipeline output video node and start
284 * all modules in the chain in the given mode.
286 * Return 0 if successful, or the return value of the failed video::s_stream
287 * operation otherwise.
289 static int vpfe_pipeline_enable(struct vpfe_pipeline *pipe)
291 struct media_entity *entity;
292 struct v4l2_subdev *subdev;
293 struct media_device *mdev;
296 if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
297 entity = vpfe_get_input_entity(pipe->outputs[0]);
299 entity = &pipe->inputs[0]->video_dev.entity;
301 mdev = entity->graph_obj.mdev;
302 mutex_lock(&mdev->graph_mutex);
303 ret = media_entity_graph_walk_init(&pipe->graph,
304 entity->graph_obj.mdev);
307 media_entity_graph_walk_start(&pipe->graph, entity);
308 while ((entity = media_entity_graph_walk_next(&pipe->graph))) {
310 if (!is_media_entity_v4l2_subdev(entity))
312 subdev = media_entity_to_v4l2_subdev(entity);
313 ret = v4l2_subdev_call(subdev, video, s_stream, 1);
314 if (ret < 0 && ret != -ENOIOCTLCMD)
319 media_entity_graph_walk_cleanup(&pipe->graph);
320 mutex_unlock(&mdev->graph_mutex);
325 * vpfe_pipeline_disable() - Disable streaming on a pipeline
326 * @vpfe_dev: vpfe device
327 * @pipe: VPFE pipeline
329 * Walk the entities chain starting at the pipeline output video node and stop
330 * all modules in the chain.
332 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
335 static int vpfe_pipeline_disable(struct vpfe_pipeline *pipe)
337 struct media_entity *entity;
338 struct v4l2_subdev *subdev;
339 struct media_device *mdev;
342 if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
343 entity = vpfe_get_input_entity(pipe->outputs[0]);
345 entity = &pipe->inputs[0]->video_dev.entity;
347 mdev = entity->graph_obj.mdev;
348 mutex_lock(&mdev->graph_mutex);
349 media_entity_graph_walk_start(&pipe->graph, entity);
351 while ((entity = media_entity_graph_walk_next(&pipe->graph))) {
353 if (!is_media_entity_v4l2_subdev(entity))
355 subdev = media_entity_to_v4l2_subdev(entity);
356 ret = v4l2_subdev_call(subdev, video, s_stream, 0);
357 if (ret < 0 && ret != -ENOIOCTLCMD)
360 mutex_unlock(&mdev->graph_mutex);
362 media_entity_graph_walk_cleanup(&pipe->graph);
363 return ret ? -ETIMEDOUT : 0;
367 * vpfe_pipeline_set_stream() - Enable/disable streaming on a pipeline
368 * @vpfe_dev: VPFE device
369 * @pipe: VPFE pipeline
370 * @state: Stream state (stopped or active)
372 * Set the pipeline to the given stream state.
374 * Return 0 if successful, or the return value of the failed video::s_stream
375 * operation otherwise.
377 static int vpfe_pipeline_set_stream(struct vpfe_pipeline *pipe,
378 enum vpfe_pipeline_stream_state state)
380 if (state == VPFE_PIPELINE_STREAM_STOPPED)
381 return vpfe_pipeline_disable(pipe);
383 return vpfe_pipeline_enable(pipe);
386 static int all_videos_stopped(struct vpfe_video_device *video)
388 struct vpfe_pipeline *pipe = &video->pipe;
391 for (i = 0; i < pipe->input_num; i++)
392 if (pipe->inputs[i]->started)
394 for (i = 0; i < pipe->output_num; i++)
395 if (pipe->outputs[i]->started)
401 * vpfe_open() - open video device
402 * @file: file pointer
404 * initialize media pipeline state, allocate memory for file handle
406 * Return 0 if successful, or the return -ENODEV otherwise.
408 static int vpfe_open(struct file *file)
410 struct vpfe_video_device *video = video_drvdata(file);
411 struct vpfe_fh *handle;
413 /* Allocate memory for the file handle object */
414 handle = kzalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
419 v4l2_fh_init(&handle->vfh, &video->video_dev);
420 v4l2_fh_add(&handle->vfh);
422 mutex_lock(&video->lock);
423 /* If decoder is not initialized. initialize it */
424 if (!video->initialized && vpfe_update_pipe_state(video)) {
425 mutex_unlock(&video->lock);
428 /* Increment device users counter */
430 /* Set io_allowed member to false */
431 handle->io_allowed = 0;
432 handle->video = video;
433 file->private_data = &handle->vfh;
434 mutex_unlock(&video->lock);
439 /* get the next buffer available from dma queue */
441 vpfe_video_get_next_buffer(struct vpfe_video_device *video)
443 video->cur_frm = video->next_frm =
444 list_entry(video->dma_queue.next,
445 struct vpfe_cap_buffer, list);
447 list_del(&video->next_frm->list);
448 video->next_frm->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
449 return vb2_dma_contig_plane_dma_addr(&video->next_frm->vb.vb2_buf, 0);
452 /* schedule the next buffer which is available on dma queue */
453 void vpfe_video_schedule_next_buffer(struct vpfe_video_device *video)
455 struct vpfe_device *vpfe_dev = video->vpfe_dev;
458 if (list_empty(&video->dma_queue))
461 video->next_frm = list_entry(video->dma_queue.next,
462 struct vpfe_cap_buffer, list);
464 if (video->pipe.state == VPFE_PIPELINE_STREAM_SINGLESHOT)
465 video->cur_frm = video->next_frm;
467 list_del(&video->next_frm->list);
468 video->next_frm->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
469 addr = vb2_dma_contig_plane_dma_addr(&video->next_frm->vb.vb2_buf, 0);
470 video->ops->queue(vpfe_dev, addr);
471 video->state = VPFE_VIDEO_BUFFER_QUEUED;
474 /* schedule the buffer for capturing bottom field */
475 void vpfe_video_schedule_bottom_field(struct vpfe_video_device *video)
477 struct vpfe_device *vpfe_dev = video->vpfe_dev;
480 addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb.vb2_buf, 0);
481 addr += video->field_off;
482 video->ops->queue(vpfe_dev, addr);
485 /* make buffer available for dequeue */
486 void vpfe_video_process_buffer_complete(struct vpfe_video_device *video)
488 struct vpfe_pipeline *pipe = &video->pipe;
490 video->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
491 vb2_buffer_done(&video->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
492 if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
493 video->cur_frm = video->next_frm;
496 /* vpfe_stop_capture() - stop streaming */
497 static void vpfe_stop_capture(struct vpfe_video_device *video)
499 struct vpfe_pipeline *pipe = &video->pipe;
503 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
505 if (all_videos_stopped(video))
506 vpfe_pipeline_set_stream(pipe,
507 VPFE_PIPELINE_STREAM_STOPPED);
511 * vpfe_release() - release video device
512 * @file: file pointer
514 * deletes buffer queue, frees the buffers and the vpfe file handle
518 static int vpfe_release(struct file *file)
520 struct vpfe_video_device *video = video_drvdata(file);
521 struct v4l2_fh *vfh = file->private_data;
522 struct vpfe_device *vpfe_dev = video->vpfe_dev;
523 struct vpfe_fh *fh = container_of(vfh, struct vpfe_fh, vfh);
525 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
527 /* Get the device lock */
528 mutex_lock(&video->lock);
529 /* if this instance is doing IO */
530 if (fh->io_allowed) {
531 if (video->started) {
532 vpfe_stop_capture(video);
534 * mark pipe state as stopped in vpfe_release(),
535 * as app might call streamon() after streamoff()
536 * in which case driver has to start streaming.
538 video->pipe.state = VPFE_PIPELINE_STREAM_STOPPED;
539 vb2_streamoff(&video->buffer_queue,
540 video->buffer_queue.type);
543 /* Free buffers allocated */
544 vb2_queue_release(&video->buffer_queue);
546 /* Decrement device users counter */
548 v4l2_fh_del(&fh->vfh);
549 v4l2_fh_exit(&fh->vfh);
550 /* If this is the last file handle */
552 video->initialized = 0;
553 mutex_unlock(&video->lock);
554 file->private_data = NULL;
555 /* Free memory allocated to file handle object */
562 * vpfe_mmap() - It is used to map kernel space buffers
565 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
567 struct vpfe_video_device *video = video_drvdata(file);
568 struct vpfe_device *vpfe_dev = video->vpfe_dev;
570 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
571 return vb2_mmap(&video->buffer_queue, vma);
575 * vpfe_poll() - It is used for select/poll system call
577 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
579 struct vpfe_video_device *video = video_drvdata(file);
580 struct vpfe_device *vpfe_dev = video->vpfe_dev;
582 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
584 return vb2_poll(&video->buffer_queue, file, wait);
588 /* vpfe capture driver file operations */
589 static const struct v4l2_file_operations vpfe_fops = {
590 .owner = THIS_MODULE,
592 .release = vpfe_release,
593 .unlocked_ioctl = video_ioctl2,
599 * vpfe_querycap() - query capabilities of video device
600 * @file: file pointer
601 * @priv: void pointer
602 * @cap: pointer to v4l2_capability structure
604 * fills v4l2 capabilities structure
608 static int vpfe_querycap(struct file *file, void *priv,
609 struct v4l2_capability *cap)
611 struct vpfe_video_device *video = video_drvdata(file);
612 struct vpfe_device *vpfe_dev = video->vpfe_dev;
614 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
616 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
617 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
619 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
620 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
621 V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
622 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
623 strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
624 strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
630 * vpfe_g_fmt() - get the format which is active on video device
631 * @file: file pointer
632 * @priv: void pointer
633 * @fmt: pointer to v4l2_format structure
635 * fills v4l2 format structure with active format
639 static int vpfe_g_fmt(struct file *file, void *priv,
640 struct v4l2_format *fmt)
642 struct vpfe_video_device *video = video_drvdata(file);
643 struct vpfe_device *vpfe_dev = video->vpfe_dev;
645 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt\n");
646 /* Fill in the information about format */
652 * vpfe_enum_fmt() - enum formats supported on media chain
653 * @file: file pointer
654 * @priv: void pointer
655 * @fmt: pointer to v4l2_fmtdesc structure
657 * fills v4l2_fmtdesc structure with output format set on adjacent subdev,
658 * only one format is enumearted as subdevs are already configured
660 * Return 0 if successful, error code otherwise
662 static int vpfe_enum_fmt(struct file *file, void *priv,
663 struct v4l2_fmtdesc *fmt)
665 struct vpfe_video_device *video = video_drvdata(file);
666 struct vpfe_device *vpfe_dev = video->vpfe_dev;
667 struct v4l2_subdev_format sd_fmt;
668 struct v4l2_mbus_framefmt mbus;
669 struct v4l2_subdev *subdev;
670 struct v4l2_format format;
671 struct media_pad *remote;
674 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt\n");
677 * since already subdev pad format is set,
678 * only one pixel format is available
680 if (fmt->index > 0) {
681 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid index\n");
684 /* get the remote pad */
685 remote = media_entity_remote_pad(&video->pad);
687 v4l2_err(&vpfe_dev->v4l2_dev,
688 "invalid remote pad for video node\n");
691 /* get the remote subdev */
692 subdev = vpfe_video_remote_subdev(video, NULL);
694 v4l2_err(&vpfe_dev->v4l2_dev,
695 "invalid remote subdev for video node\n");
698 sd_fmt.pad = remote->index;
699 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
700 /* get output format of remote subdev */
701 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt);
703 v4l2_err(&vpfe_dev->v4l2_dev,
704 "invalid remote subdev for video node\n");
707 /* convert to pix format */
708 mbus.code = sd_fmt.format.code;
709 mbus_to_pix(&mbus, &format.fmt.pix);
710 /* copy the result */
711 fmt->pixelformat = format.fmt.pix.pixelformat;
717 * vpfe_s_fmt() - set the format on video device
718 * @file: file pointer
719 * @priv: void pointer
720 * @fmt: pointer to v4l2_format structure
722 * validate and set the format on video device
724 * Return 0 on success, error code otherwise
726 static int vpfe_s_fmt(struct file *file, void *priv,
727 struct v4l2_format *fmt)
729 struct vpfe_video_device *video = video_drvdata(file);
730 struct vpfe_device *vpfe_dev = video->vpfe_dev;
731 struct v4l2_format format;
734 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt\n");
735 /* If streaming is started, return error */
736 if (video->started) {
737 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
740 /* get adjacent subdev's output pad format */
741 ret = __vpfe_video_get_format(video, &format);
750 * vpfe_try_fmt() - try the format on video device
751 * @file: file pointer
752 * @priv: void pointer
753 * @fmt: pointer to v4l2_format structure
755 * validate the format, update with correct format
756 * based on output format set on adjacent subdev
758 * Return 0 on success, error code otherwise
760 static int vpfe_try_fmt(struct file *file, void *priv,
761 struct v4l2_format *fmt)
763 struct vpfe_video_device *video = video_drvdata(file);
764 struct vpfe_device *vpfe_dev = video->vpfe_dev;
765 struct v4l2_format format;
768 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt\n");
769 /* get adjacent subdev's output pad format */
770 ret = __vpfe_video_get_format(video, &format);
779 * vpfe_enum_input() - enum inputs supported on media chain
780 * @file: file pointer
781 * @priv: void pointer
782 * @fmt: pointer to v4l2_fmtdesc structure
784 * fills v4l2_input structure with input available on media chain,
785 * only one input is enumearted as media chain is setup by this time
787 * Return 0 if successful, -EINVAL is media chain is invalid
789 static int vpfe_enum_input(struct file *file, void *priv,
790 struct v4l2_input *inp)
792 struct vpfe_video_device *video = video_drvdata(file);
793 struct vpfe_ext_subdev_info *sdinfo = video->current_ext_subdev;
794 struct vpfe_device *vpfe_dev = video->vpfe_dev;
796 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
797 /* enumerate from the subdev user has chosen through mc */
798 if (inp->index < sdinfo->num_inputs) {
799 memcpy(inp, &sdinfo->inputs[inp->index],
800 sizeof(struct v4l2_input));
807 * vpfe_g_input() - get index of the input which is active
808 * @file: file pointer
809 * @priv: void pointer
810 * @index: pointer to unsigned int
812 * set index with input index which is active
814 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
816 struct vpfe_video_device *video = video_drvdata(file);
817 struct vpfe_device *vpfe_dev = video->vpfe_dev;
819 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
821 *index = video->current_input;
826 * vpfe_s_input() - set input which is pointed by input index
827 * @file: file pointer
828 * @priv: void pointer
829 * @index: pointer to unsigned int
831 * set input on external subdev
833 * Return 0 on success, error code otherwise
835 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
837 struct vpfe_video_device *video = video_drvdata(file);
838 struct vpfe_device *vpfe_dev = video->vpfe_dev;
839 struct vpfe_ext_subdev_info *sdinfo;
840 struct vpfe_route *route;
841 struct v4l2_input *inps;
847 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
849 ret = mutex_lock_interruptible(&video->lock);
853 * If streaming is started return device busy
856 if (video->started) {
857 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
862 sdinfo = video->current_ext_subdev;
863 if (!sdinfo->registered) {
867 if (vpfe_dev->cfg->setup_input &&
868 vpfe_dev->cfg->setup_input(sdinfo->grp_id) < 0) {
870 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
871 "couldn't setup input for %s\n",
872 sdinfo->module_name);
875 route = &sdinfo->routes[index];
876 if (route && sdinfo->can_route) {
877 input = route->input;
878 output = route->output;
879 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
880 sdinfo->grp_id, video,
881 s_routing, input, output, 0);
883 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
884 "s_input:error in setting input in decoder\n");
889 /* set standards set by subdev in video device */
890 for (i = 0; i < sdinfo->num_inputs; i++) {
891 inps = &sdinfo->inputs[i];
892 video->video_dev.tvnorms |= inps->std;
894 video->current_input = index;
896 mutex_unlock(&video->lock);
901 * vpfe_querystd() - query std which is being input on external subdev
902 * @file: file pointer
903 * @priv: void pointer
904 * @std_id: pointer to v4l2_std_id structure
906 * call external subdev through v4l2_device_call_until_err to
907 * get the std that is being active.
909 * Return 0 on success, error code otherwise
911 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
913 struct vpfe_video_device *video = video_drvdata(file);
914 struct vpfe_device *vpfe_dev = video->vpfe_dev;
915 struct vpfe_ext_subdev_info *sdinfo;
918 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
920 ret = mutex_lock_interruptible(&video->lock);
921 sdinfo = video->current_ext_subdev;
924 /* Call querystd function of decoder device */
925 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
926 video, querystd, std_id);
927 mutex_unlock(&video->lock);
932 * vpfe_s_std() - set std on external subdev
933 * @file: file pointer
934 * @priv: void pointer
935 * @std_id: pointer to v4l2_std_id structure
937 * set std pointed by std_id on external subdev by calling it using
938 * v4l2_device_call_until_err
940 * Return 0 on success, error code otherwise
942 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
944 struct vpfe_video_device *video = video_drvdata(file);
945 struct vpfe_device *vpfe_dev = video->vpfe_dev;
946 struct vpfe_ext_subdev_info *sdinfo;
949 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
951 /* Call decoder driver function to set the standard */
952 ret = mutex_lock_interruptible(&video->lock);
955 sdinfo = video->current_ext_subdev;
956 /* If streaming is started, return device busy error */
957 if (video->started) {
958 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
962 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
963 video, s_std, std_id);
965 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
966 video->stdid = V4L2_STD_UNKNOWN;
969 video->stdid = std_id;
971 mutex_unlock(&video->lock);
975 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *tvnorm)
977 struct vpfe_video_device *video = video_drvdata(file);
978 struct vpfe_device *vpfe_dev = video->vpfe_dev;
980 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
981 *tvnorm = video->stdid;
986 * vpfe_enum_dv_timings() - enumerate dv_timings which are supported by
988 * @file: file pointer
989 * @priv: void pointer
990 * @timings: pointer to v4l2_enum_dv_timings structure
992 * enum dv_timings's which are supported by external subdev through
995 * Return 0 on success, error code otherwise
998 vpfe_enum_dv_timings(struct file *file, void *fh,
999 struct v4l2_enum_dv_timings *timings)
1001 struct vpfe_video_device *video = video_drvdata(file);
1002 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1003 struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
1007 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_dv_timings\n");
1008 return v4l2_subdev_call(subdev, pad, enum_dv_timings, timings);
1012 * vpfe_query_dv_timings() - query the dv_timings which is being input
1013 * to external subdev
1014 * @file: file pointer
1015 * @priv: void pointer
1016 * @timings: pointer to v4l2_dv_timings structure
1018 * get dv_timings which is being input on external subdev through
1021 * Return 0 on success, error code otherwise
1024 vpfe_query_dv_timings(struct file *file, void *fh,
1025 struct v4l2_dv_timings *timings)
1027 struct vpfe_video_device *video = video_drvdata(file);
1028 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1029 struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
1031 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_query_dv_timings\n");
1032 return v4l2_subdev_call(subdev, video, query_dv_timings, timings);
1036 * vpfe_s_dv_timings() - set dv_timings on external subdev
1037 * @file: file pointer
1038 * @priv: void pointer
1039 * @timings: pointer to v4l2_dv_timings structure
1041 * set dv_timings pointed by timings on external subdev through
1042 * v4l2_device_call_until_err, this configures amplifier also
1044 * Return 0 on success, error code otherwise
1047 vpfe_s_dv_timings(struct file *file, void *fh,
1048 struct v4l2_dv_timings *timings)
1050 struct vpfe_video_device *video = video_drvdata(file);
1051 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1053 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_dv_timings\n");
1055 video->stdid = V4L2_STD_UNKNOWN;
1056 return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
1057 video->current_ext_subdev->grp_id,
1058 video, s_dv_timings, timings);
1062 * vpfe_g_dv_timings() - get dv_timings which is set on external subdev
1063 * @file: file pointer
1064 * @priv: void pointer
1065 * @timings: pointer to v4l2_dv_timings structure
1067 * get dv_timings which is set on external subdev through
1070 * Return 0 on success, error code otherwise
1073 vpfe_g_dv_timings(struct file *file, void *fh,
1074 struct v4l2_dv_timings *timings)
1076 struct vpfe_video_device *video = video_drvdata(file);
1077 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1078 struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
1080 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_dv_timings\n");
1081 return v4l2_subdev_call(subdev, video, g_dv_timings, timings);
1085 * Videobuf operations
1088 * vpfe_buffer_queue_setup : Callback function for buffer setup.
1089 * @vq: vb2_queue ptr
1091 * @nbuffers: ptr to number of buffers requested by application
1092 * @nplanes:: contains number of distinct video planes needed to hold a frame
1093 * @sizes[]: contains the size (in bytes) of each plane.
1094 * @alloc_devs: ptr to allocation context
1096 * This callback function is called when reqbuf() is called to adjust
1097 * the buffer nbuffers and buffer size
1100 vpfe_buffer_queue_setup(struct vb2_queue *vq,
1101 unsigned int *nbuffers, unsigned int *nplanes,
1102 unsigned int sizes[], struct device *alloc_devs[])
1104 struct vpfe_fh *fh = vb2_get_drv_priv(vq);
1105 struct vpfe_video_device *video = fh->video;
1106 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1109 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue_setup\n");
1110 size = video->fmt.fmt.pix.sizeimage;
1112 if (vq->num_buffers + *nbuffers < 3)
1113 *nbuffers = 3 - vq->num_buffers;
1117 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1118 "nbuffers=%d, size=%lu\n", *nbuffers, size);
1123 * vpfe_buffer_prepare : callback function for buffer prepare
1124 * @vb: ptr to vb2_buffer
1126 * This is the callback function for buffer prepare when vb2_qbuf()
1127 * function is called. The buffer is prepared and user space virtual address
1128 * or user address is converted into physical address
1130 static int vpfe_buffer_prepare(struct vb2_buffer *vb)
1132 struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
1133 struct vpfe_video_device *video = fh->video;
1134 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1137 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1139 if (vb->state != VB2_BUF_STATE_ACTIVE &&
1140 vb->state != VB2_BUF_STATE_PREPARED)
1143 /* Initialize buffer */
1144 vb2_set_plane_payload(vb, 0, video->fmt.fmt.pix.sizeimage);
1145 if (vb2_plane_vaddr(vb, 0) &&
1146 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
1149 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
1150 /* Make sure user addresses are aligned to 32 bytes */
1151 if (!ALIGN(addr, 32))
1157 static void vpfe_buffer_queue(struct vb2_buffer *vb)
1159 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1160 /* Get the file handle object and device object */
1161 struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
1162 struct vpfe_video_device *video = fh->video;
1163 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1164 struct vpfe_pipeline *pipe = &video->pipe;
1165 struct vpfe_cap_buffer *buf = container_of(vbuf,
1166 struct vpfe_cap_buffer, vb);
1167 unsigned long flags;
1168 unsigned long empty;
1171 spin_lock_irqsave(&video->dma_queue_lock, flags);
1172 empty = list_empty(&video->dma_queue);
1173 /* add the buffer to the DMA queue */
1174 list_add_tail(&buf->list, &video->dma_queue);
1175 spin_unlock_irqrestore(&video->dma_queue_lock, flags);
1176 /* this case happens in case of single shot */
1177 if (empty && video->started && pipe->state ==
1178 VPFE_PIPELINE_STREAM_SINGLESHOT &&
1179 video->state == VPFE_VIDEO_BUFFER_NOT_QUEUED) {
1180 spin_lock(&video->dma_queue_lock);
1181 addr = vpfe_video_get_next_buffer(video);
1182 video->ops->queue(vpfe_dev, addr);
1184 video->state = VPFE_VIDEO_BUFFER_QUEUED;
1185 spin_unlock(&video->dma_queue_lock);
1187 /* enable h/w each time in single shot */
1188 if (vpfe_video_is_pipe_ready(pipe))
1189 vpfe_pipeline_set_stream(pipe,
1190 VPFE_PIPELINE_STREAM_SINGLESHOT);
1194 /* vpfe_start_capture() - start streaming on all the subdevs */
1195 static int vpfe_start_capture(struct vpfe_video_device *video)
1197 struct vpfe_pipeline *pipe = &video->pipe;
1201 if (vpfe_video_is_pipe_ready(pipe))
1202 ret = vpfe_pipeline_set_stream(pipe, pipe->state);
1207 static int vpfe_start_streaming(struct vb2_queue *vq, unsigned int count)
1209 struct vpfe_fh *fh = vb2_get_drv_priv(vq);
1210 struct vpfe_video_device *video = fh->video;
1211 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1215 ret = mutex_lock_interruptible(&video->lock);
1219 /* Get the next frame from the buffer queue */
1220 video->cur_frm = video->next_frm =
1221 list_entry(video->dma_queue.next, struct vpfe_cap_buffer, list);
1222 /* Remove buffer from the buffer queue */
1223 list_del(&video->cur_frm->list);
1224 /* Mark state of the current frame to active */
1225 video->cur_frm->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
1226 /* Initialize field_id and started member */
1227 video->field_id = 0;
1228 addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb.vb2_buf, 0);
1229 video->ops->queue(vpfe_dev, addr);
1230 video->state = VPFE_VIDEO_BUFFER_QUEUED;
1232 ret = vpfe_start_capture(video);
1234 struct vpfe_cap_buffer *buf, *tmp;
1236 vb2_buffer_done(&video->cur_frm->vb.vb2_buf,
1237 VB2_BUF_STATE_QUEUED);
1238 list_for_each_entry_safe(buf, tmp, &video->dma_queue, list) {
1239 list_del(&buf->list);
1240 vb2_buffer_done(&buf->vb.vb2_buf,
1241 VB2_BUF_STATE_QUEUED);
1246 mutex_unlock(&video->lock);
1250 mutex_unlock(&video->lock);
1252 ret = vb2_streamoff(&video->buffer_queue, video->buffer_queue.type);
1256 static int vpfe_buffer_init(struct vb2_buffer *vb)
1258 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1259 struct vpfe_cap_buffer *buf = container_of(vbuf,
1260 struct vpfe_cap_buffer, vb);
1262 INIT_LIST_HEAD(&buf->list);
1266 /* abort streaming and wait for last buffer */
1267 static void vpfe_stop_streaming(struct vb2_queue *vq)
1269 struct vpfe_fh *fh = vb2_get_drv_priv(vq);
1270 struct vpfe_video_device *video = fh->video;
1272 /* release all active buffers */
1273 if (video->cur_frm == video->next_frm) {
1274 vb2_buffer_done(&video->cur_frm->vb.vb2_buf,
1275 VB2_BUF_STATE_ERROR);
1277 if (video->cur_frm != NULL)
1278 vb2_buffer_done(&video->cur_frm->vb.vb2_buf,
1279 VB2_BUF_STATE_ERROR);
1280 if (video->next_frm != NULL)
1281 vb2_buffer_done(&video->next_frm->vb.vb2_buf,
1282 VB2_BUF_STATE_ERROR);
1285 while (!list_empty(&video->dma_queue)) {
1286 video->next_frm = list_entry(video->dma_queue.next,
1287 struct vpfe_cap_buffer, list);
1288 list_del(&video->next_frm->list);
1289 vb2_buffer_done(&video->next_frm->vb.vb2_buf,
1290 VB2_BUF_STATE_ERROR);
1294 static void vpfe_buf_cleanup(struct vb2_buffer *vb)
1296 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1297 struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
1298 struct vpfe_video_device *video = fh->video;
1299 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1300 struct vpfe_cap_buffer *buf = container_of(vbuf,
1301 struct vpfe_cap_buffer, vb);
1303 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buf_cleanup\n");
1304 if (vb->state == VB2_BUF_STATE_ACTIVE)
1305 list_del_init(&buf->list);
1308 static struct vb2_ops video_qops = {
1309 .queue_setup = vpfe_buffer_queue_setup,
1310 .buf_init = vpfe_buffer_init,
1311 .buf_prepare = vpfe_buffer_prepare,
1312 .start_streaming = vpfe_start_streaming,
1313 .stop_streaming = vpfe_stop_streaming,
1314 .buf_cleanup = vpfe_buf_cleanup,
1315 .buf_queue = vpfe_buffer_queue,
1319 * vpfe_reqbufs() - supported REQBUF only once opening
1322 static int vpfe_reqbufs(struct file *file, void *priv,
1323 struct v4l2_requestbuffers *req_buf)
1325 struct vpfe_video_device *video = video_drvdata(file);
1326 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1327 struct vpfe_fh *fh = file->private_data;
1328 struct vb2_queue *q;
1331 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1333 if (req_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1334 req_buf->type != V4L2_BUF_TYPE_VIDEO_OUTPUT){
1335 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1339 ret = mutex_lock_interruptible(&video->lock);
1343 if (video->io_usrs != 0) {
1344 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1348 video->memory = req_buf->memory;
1350 /* Initialize videobuf2 queue as per the buffer type */
1351 q = &video->buffer_queue;
1352 q->type = req_buf->type;
1353 q->io_modes = VB2_MMAP | VB2_USERPTR;
1355 q->min_buffers_needed = 1;
1356 q->ops = &video_qops;
1357 q->mem_ops = &vb2_dma_contig_memops;
1358 q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
1359 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1360 q->dev = vpfe_dev->pdev;
1362 ret = vb2_queue_init(q);
1364 v4l2_err(&vpfe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1370 INIT_LIST_HEAD(&video->dma_queue);
1371 ret = vb2_reqbufs(&video->buffer_queue, req_buf);
1374 mutex_unlock(&video->lock);
1379 * vpfe_querybuf() - query buffers for exchange
1381 static int vpfe_querybuf(struct file *file, void *priv,
1382 struct v4l2_buffer *buf)
1384 struct vpfe_video_device *video = video_drvdata(file);
1385 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1387 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1389 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1390 buf->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1391 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1395 if (video->memory != V4L2_MEMORY_MMAP) {
1396 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1400 /* Call vb2_querybuf to get information */
1401 return vb2_querybuf(&video->buffer_queue, buf);
1405 * vpfe_qbuf() - queue buffers for capture or processing
1407 static int vpfe_qbuf(struct file *file, void *priv,
1408 struct v4l2_buffer *p)
1410 struct vpfe_video_device *video = video_drvdata(file);
1411 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1412 struct vpfe_fh *fh = file->private_data;
1414 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1416 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1417 p->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1418 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1422 * If this file handle is not allowed to do IO,
1425 if (!fh->io_allowed) {
1426 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1430 return vb2_qbuf(&video->buffer_queue, p);
1434 * vpfe_dqbuf() - deque buffer which is done with processing
1436 static int vpfe_dqbuf(struct file *file, void *priv,
1437 struct v4l2_buffer *buf)
1439 struct vpfe_video_device *video = video_drvdata(file);
1440 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1442 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1444 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1445 buf->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1446 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1450 return vb2_dqbuf(&video->buffer_queue,
1451 buf, (file->f_flags & O_NONBLOCK));
1455 * vpfe_streamon() - start streaming
1456 * @file: file pointer
1457 * @priv: void pointer
1458 * @buf_type: enum v4l2_buf_type
1460 * queue buffer onto hardware for capture/processing and
1461 * start all the subdevs which are in media chain
1463 * Return 0 on success, error code otherwise
1465 static int vpfe_streamon(struct file *file, void *priv,
1466 enum v4l2_buf_type buf_type)
1468 struct vpfe_video_device *video = video_drvdata(file);
1469 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1470 struct vpfe_pipeline *pipe = &video->pipe;
1471 struct vpfe_fh *fh = file->private_data;
1472 struct vpfe_ext_subdev_info *sdinfo;
1475 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1477 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1478 buf_type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1479 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1482 /* If file handle is not allowed IO, return error */
1483 if (!fh->io_allowed) {
1484 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1487 sdinfo = video->current_ext_subdev;
1488 /* If buffer queue is empty, return error */
1489 if (list_empty(&video->buffer_queue.queued_list)) {
1490 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1493 /* Validate the pipeline */
1494 if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1495 ret = vpfe_video_validate_pipeline(pipe);
1499 /* Call vb2_streamon to start streaming */
1500 return vb2_streamon(&video->buffer_queue, buf_type);
1504 * vpfe_streamoff() - stop streaming
1505 * @file: file pointer
1506 * @priv: void pointer
1507 * @buf_type: enum v4l2_buf_type
1509 * stop all the subdevs which are in media chain
1511 * Return 0 on success, error code otherwise
1513 static int vpfe_streamoff(struct file *file, void *priv,
1514 enum v4l2_buf_type buf_type)
1516 struct vpfe_video_device *video = video_drvdata(file);
1517 struct vpfe_device *vpfe_dev = video->vpfe_dev;
1518 struct vpfe_fh *fh = file->private_data;
1521 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1523 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1524 buf_type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1525 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "Invalid buf type\n");
1529 /* If io is allowed for this file handle, return error */
1530 if (!fh->io_allowed) {
1531 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1535 /* If streaming is not started, return error */
1536 if (!video->started) {
1537 v4l2_err(&vpfe_dev->v4l2_dev, "device is not started\n");
1541 ret = mutex_lock_interruptible(&video->lock);
1545 vpfe_stop_capture(video);
1546 ret = vb2_streamoff(&video->buffer_queue, buf_type);
1547 mutex_unlock(&video->lock);
1552 /* vpfe capture ioctl operations */
1553 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1554 .vidioc_querycap = vpfe_querycap,
1555 .vidioc_g_fmt_vid_cap = vpfe_g_fmt,
1556 .vidioc_s_fmt_vid_cap = vpfe_s_fmt,
1557 .vidioc_try_fmt_vid_cap = vpfe_try_fmt,
1558 .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt,
1559 .vidioc_g_fmt_vid_out = vpfe_g_fmt,
1560 .vidioc_s_fmt_vid_out = vpfe_s_fmt,
1561 .vidioc_try_fmt_vid_out = vpfe_try_fmt,
1562 .vidioc_enum_fmt_vid_out = vpfe_enum_fmt,
1563 .vidioc_enum_input = vpfe_enum_input,
1564 .vidioc_g_input = vpfe_g_input,
1565 .vidioc_s_input = vpfe_s_input,
1566 .vidioc_querystd = vpfe_querystd,
1567 .vidioc_s_std = vpfe_s_std,
1568 .vidioc_g_std = vpfe_g_std,
1569 .vidioc_enum_dv_timings = vpfe_enum_dv_timings,
1570 .vidioc_query_dv_timings = vpfe_query_dv_timings,
1571 .vidioc_s_dv_timings = vpfe_s_dv_timings,
1572 .vidioc_g_dv_timings = vpfe_g_dv_timings,
1573 .vidioc_reqbufs = vpfe_reqbufs,
1574 .vidioc_querybuf = vpfe_querybuf,
1575 .vidioc_qbuf = vpfe_qbuf,
1576 .vidioc_dqbuf = vpfe_dqbuf,
1577 .vidioc_streamon = vpfe_streamon,
1578 .vidioc_streamoff = vpfe_streamoff,
1581 /* VPFE video init function */
1582 int vpfe_video_init(struct vpfe_video_device *video, const char *name)
1584 const char *direction;
1587 switch (video->type) {
1588 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1589 direction = "output";
1590 video->pad.flags = MEDIA_PAD_FL_SINK;
1591 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1594 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1595 direction = "input";
1596 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1597 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1603 /* Initialize field of video device */
1604 video->video_dev.release = video_device_release;
1605 video->video_dev.fops = &vpfe_fops;
1606 video->video_dev.ioctl_ops = &vpfe_ioctl_ops;
1607 video->video_dev.minor = -1;
1608 video->video_dev.tvnorms = 0;
1609 snprintf(video->video_dev.name, sizeof(video->video_dev.name),
1610 "DAVINCI VIDEO %s %s", name, direction);
1612 spin_lock_init(&video->irqlock);
1613 spin_lock_init(&video->dma_queue_lock);
1614 mutex_init(&video->lock);
1615 ret = media_entity_pads_init(&video->video_dev.entity,
1620 video_set_drvdata(&video->video_dev, video);
1625 /* vpfe video device register function */
1626 int vpfe_video_register(struct vpfe_video_device *video,
1627 struct v4l2_device *vdev)
1631 video->video_dev.v4l2_dev = vdev;
1633 ret = video_register_device(&video->video_dev, VFL_TYPE_GRABBER, -1);
1635 pr_err("%s: could not register video device (%d)\n",
1640 /* vpfe video device unregister function */
1641 void vpfe_video_unregister(struct vpfe_video_device *video)
1643 if (video_is_registered(&video->video_dev)) {
1644 video_unregister_device(&video->video_dev);
1645 media_entity_cleanup(&video->video_dev.entity);