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_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_graph_walk_init(&graph
, mdev
);
150 mutex_unlock(&mdev
->graph_mutex
);
153 media_graph_walk_start(&graph
, entity
);
154 while ((entity
= media_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_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 whether 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_graph_walk_init(&pipe
->graph
, mdev
);
306 media_graph_walk_start(&pipe
->graph
, entity
);
307 while ((entity
= media_graph_walk_next(&pipe
->graph
))) {
309 if (!is_media_entity_v4l2_subdev(entity
))
311 subdev
= media_entity_to_v4l2_subdev(entity
);
312 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, 1);
313 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
318 media_graph_walk_cleanup(&pipe
->graph
);
319 mutex_unlock(&mdev
->graph_mutex
);
324 * vpfe_pipeline_disable() - Disable streaming on a pipeline
325 * @vpfe_dev: vpfe device
326 * @pipe: VPFE pipeline
328 * Walk the entities chain starting at the pipeline output video node and stop
329 * all modules in the chain.
331 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
334 static int vpfe_pipeline_disable(struct vpfe_pipeline
*pipe
)
336 struct media_entity
*entity
;
337 struct v4l2_subdev
*subdev
;
338 struct media_device
*mdev
;
341 if (pipe
->state
== VPFE_PIPELINE_STREAM_CONTINUOUS
)
342 entity
= vpfe_get_input_entity(pipe
->outputs
[0]);
344 entity
= &pipe
->inputs
[0]->video_dev
.entity
;
346 mdev
= entity
->graph_obj
.mdev
;
347 mutex_lock(&mdev
->graph_mutex
);
348 media_graph_walk_start(&pipe
->graph
, entity
);
350 while ((entity
= media_graph_walk_next(&pipe
->graph
))) {
352 if (!is_media_entity_v4l2_subdev(entity
))
354 subdev
= media_entity_to_v4l2_subdev(entity
);
355 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, 0);
356 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
359 mutex_unlock(&mdev
->graph_mutex
);
361 media_graph_walk_cleanup(&pipe
->graph
);
362 return ret
? -ETIMEDOUT
: 0;
366 * vpfe_pipeline_set_stream() - Enable/disable streaming on a pipeline
367 * @vpfe_dev: VPFE device
368 * @pipe: VPFE pipeline
369 * @state: Stream state (stopped or active)
371 * Set the pipeline to the given stream state.
373 * Return 0 if successful, or the return value of the failed video::s_stream
374 * operation otherwise.
376 static int vpfe_pipeline_set_stream(struct vpfe_pipeline
*pipe
,
377 enum vpfe_pipeline_stream_state state
)
379 if (state
== VPFE_PIPELINE_STREAM_STOPPED
)
380 return vpfe_pipeline_disable(pipe
);
382 return vpfe_pipeline_enable(pipe
);
385 static int all_videos_stopped(struct vpfe_video_device
*video
)
387 struct vpfe_pipeline
*pipe
= &video
->pipe
;
390 for (i
= 0; i
< pipe
->input_num
; i
++)
391 if (pipe
->inputs
[i
]->started
)
393 for (i
= 0; i
< pipe
->output_num
; i
++)
394 if (pipe
->outputs
[i
]->started
)
400 * vpfe_open() - open video device
401 * @file: file pointer
403 * initialize media pipeline state, allocate memory for file handle
405 * Return 0 if successful, or the return -ENODEV otherwise.
407 static int vpfe_open(struct file
*file
)
409 struct vpfe_video_device
*video
= video_drvdata(file
);
410 struct vpfe_fh
*handle
;
412 /* Allocate memory for the file handle object */
413 handle
= kzalloc(sizeof(struct vpfe_fh
), GFP_KERNEL
);
418 v4l2_fh_init(&handle
->vfh
, &video
->video_dev
);
419 v4l2_fh_add(&handle
->vfh
);
421 mutex_lock(&video
->lock
);
422 /* If decoder is not initialized. initialize it */
423 if (!video
->initialized
&& vpfe_update_pipe_state(video
)) {
424 mutex_unlock(&video
->lock
);
427 /* Increment device users counter */
429 /* Set io_allowed member to false */
430 handle
->io_allowed
= 0;
431 handle
->video
= video
;
432 file
->private_data
= &handle
->vfh
;
433 mutex_unlock(&video
->lock
);
438 /* get the next buffer available from dma queue */
440 vpfe_video_get_next_buffer(struct vpfe_video_device
*video
)
442 video
->cur_frm
= video
->next_frm
=
443 list_entry(video
->dma_queue
.next
,
444 struct vpfe_cap_buffer
, list
);
446 list_del(&video
->next_frm
->list
);
447 video
->next_frm
->vb
.vb2_buf
.state
= VB2_BUF_STATE_ACTIVE
;
448 return vb2_dma_contig_plane_dma_addr(&video
->next_frm
->vb
.vb2_buf
, 0);
451 /* schedule the next buffer which is available on dma queue */
452 void vpfe_video_schedule_next_buffer(struct vpfe_video_device
*video
)
454 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
457 if (list_empty(&video
->dma_queue
))
460 video
->next_frm
= list_entry(video
->dma_queue
.next
,
461 struct vpfe_cap_buffer
, list
);
463 if (video
->pipe
.state
== VPFE_PIPELINE_STREAM_SINGLESHOT
)
464 video
->cur_frm
= video
->next_frm
;
466 list_del(&video
->next_frm
->list
);
467 video
->next_frm
->vb
.vb2_buf
.state
= VB2_BUF_STATE_ACTIVE
;
468 addr
= vb2_dma_contig_plane_dma_addr(&video
->next_frm
->vb
.vb2_buf
, 0);
469 video
->ops
->queue(vpfe_dev
, addr
);
470 video
->state
= VPFE_VIDEO_BUFFER_QUEUED
;
473 /* schedule the buffer for capturing bottom field */
474 void vpfe_video_schedule_bottom_field(struct vpfe_video_device
*video
)
476 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
479 addr
= vb2_dma_contig_plane_dma_addr(&video
->cur_frm
->vb
.vb2_buf
, 0);
480 addr
+= video
->field_off
;
481 video
->ops
->queue(vpfe_dev
, addr
);
484 /* make buffer available for dequeue */
485 void vpfe_video_process_buffer_complete(struct vpfe_video_device
*video
)
487 struct vpfe_pipeline
*pipe
= &video
->pipe
;
489 video
->cur_frm
->vb
.vb2_buf
.timestamp
= ktime_get_ns();
490 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
, VB2_BUF_STATE_DONE
);
491 if (pipe
->state
== VPFE_PIPELINE_STREAM_CONTINUOUS
)
492 video
->cur_frm
= video
->next_frm
;
495 /* vpfe_stop_capture() - stop streaming */
496 static void vpfe_stop_capture(struct vpfe_video_device
*video
)
498 struct vpfe_pipeline
*pipe
= &video
->pipe
;
502 if (video
->type
== V4L2_BUF_TYPE_VIDEO_OUTPUT
)
504 if (all_videos_stopped(video
))
505 vpfe_pipeline_set_stream(pipe
,
506 VPFE_PIPELINE_STREAM_STOPPED
);
510 * vpfe_release() - release video device
511 * @file: file pointer
513 * deletes buffer queue, frees the buffers and the vpfe file handle
517 static int vpfe_release(struct file
*file
)
519 struct vpfe_video_device
*video
= video_drvdata(file
);
520 struct v4l2_fh
*vfh
= file
->private_data
;
521 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
522 struct vpfe_fh
*fh
= container_of(vfh
, struct vpfe_fh
, vfh
);
524 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_release\n");
526 /* Get the device lock */
527 mutex_lock(&video
->lock
);
528 /* if this instance is doing IO */
529 if (fh
->io_allowed
) {
530 if (video
->started
) {
531 vpfe_stop_capture(video
);
533 * mark pipe state as stopped in vpfe_release(),
534 * as app might call streamon() after streamoff()
535 * in which case driver has to start streaming.
537 video
->pipe
.state
= VPFE_PIPELINE_STREAM_STOPPED
;
538 vb2_streamoff(&video
->buffer_queue
,
539 video
->buffer_queue
.type
);
542 /* Free buffers allocated */
543 vb2_queue_release(&video
->buffer_queue
);
545 /* Decrement device users counter */
547 v4l2_fh_del(&fh
->vfh
);
548 v4l2_fh_exit(&fh
->vfh
);
549 /* If this is the last file handle */
551 video
->initialized
= 0;
552 mutex_unlock(&video
->lock
);
553 file
->private_data
= NULL
;
554 /* Free memory allocated to file handle object */
561 * vpfe_mmap() - It is used to map kernel space buffers
564 static int vpfe_mmap(struct file
*file
, struct vm_area_struct
*vma
)
566 struct vpfe_video_device
*video
= video_drvdata(file
);
567 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
569 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_mmap\n");
570 return vb2_mmap(&video
->buffer_queue
, vma
);
574 * vpfe_poll() - It is used for select/poll system call
576 static unsigned int vpfe_poll(struct file
*file
, poll_table
*wait
)
578 struct vpfe_video_device
*video
= video_drvdata(file
);
579 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
581 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_poll\n");
583 return vb2_poll(&video
->buffer_queue
, file
, wait
);
587 /* vpfe capture driver file operations */
588 static const struct v4l2_file_operations vpfe_fops
= {
589 .owner
= THIS_MODULE
,
591 .release
= vpfe_release
,
592 .unlocked_ioctl
= video_ioctl2
,
598 * vpfe_querycap() - query capabilities of video device
599 * @file: file pointer
600 * @priv: void pointer
601 * @cap: pointer to v4l2_capability structure
603 * fills v4l2 capabilities structure
607 static int vpfe_querycap(struct file
*file
, void *priv
,
608 struct v4l2_capability
*cap
)
610 struct vpfe_video_device
*video
= video_drvdata(file
);
611 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
613 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querycap\n");
615 if (video
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
)
616 cap
->device_caps
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
618 cap
->device_caps
= V4L2_CAP_VIDEO_OUTPUT
| V4L2_CAP_STREAMING
;
619 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_VIDEO_OUTPUT
|
620 V4L2_CAP_STREAMING
| V4L2_CAP_DEVICE_CAPS
;
621 strlcpy(cap
->driver
, CAPTURE_DRV_NAME
, sizeof(cap
->driver
));
622 strlcpy(cap
->bus_info
, "VPFE", sizeof(cap
->bus_info
));
623 strlcpy(cap
->card
, vpfe_dev
->cfg
->card_name
, sizeof(cap
->card
));
629 * vpfe_g_fmt() - get the format which is active on video device
630 * @file: file pointer
631 * @priv: void pointer
632 * @fmt: pointer to v4l2_format structure
634 * fills v4l2 format structure with active format
638 static int vpfe_g_fmt(struct file
*file
, void *priv
,
639 struct v4l2_format
*fmt
)
641 struct vpfe_video_device
*video
= video_drvdata(file
);
642 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
644 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_fmt\n");
645 /* Fill in the information about format */
651 * vpfe_enum_fmt() - enum formats supported on media chain
652 * @file: file pointer
653 * @priv: void pointer
654 * @fmt: pointer to v4l2_fmtdesc structure
656 * fills v4l2_fmtdesc structure with output format set on adjacent subdev,
657 * only one format is enumearted as subdevs are already configured
659 * Return 0 if successful, error code otherwise
661 static int vpfe_enum_fmt(struct file
*file
, void *priv
,
662 struct v4l2_fmtdesc
*fmt
)
664 struct vpfe_video_device
*video
= video_drvdata(file
);
665 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
666 struct v4l2_subdev_format sd_fmt
;
667 struct v4l2_mbus_framefmt mbus
;
668 struct v4l2_subdev
*subdev
;
669 struct v4l2_format format
;
670 struct media_pad
*remote
;
673 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_fmt\n");
676 * since already subdev pad format is set,
677 * only one pixel format is available
679 if (fmt
->index
> 0) {
680 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid index\n");
683 /* get the remote pad */
684 remote
= media_entity_remote_pad(&video
->pad
);
686 v4l2_err(&vpfe_dev
->v4l2_dev
,
687 "invalid remote pad for video node\n");
690 /* get the remote subdev */
691 subdev
= vpfe_video_remote_subdev(video
, NULL
);
693 v4l2_err(&vpfe_dev
->v4l2_dev
,
694 "invalid remote subdev for video node\n");
697 sd_fmt
.pad
= remote
->index
;
698 sd_fmt
.which
= V4L2_SUBDEV_FORMAT_ACTIVE
;
699 /* get output format of remote subdev */
700 ret
= v4l2_subdev_call(subdev
, pad
, get_fmt
, NULL
, &sd_fmt
);
702 v4l2_err(&vpfe_dev
->v4l2_dev
,
703 "invalid remote subdev for video node\n");
706 /* convert to pix format */
707 mbus
.code
= sd_fmt
.format
.code
;
708 mbus_to_pix(&mbus
, &format
.fmt
.pix
);
709 /* copy the result */
710 fmt
->pixelformat
= format
.fmt
.pix
.pixelformat
;
716 * vpfe_s_fmt() - set the format on video device
717 * @file: file pointer
718 * @priv: void pointer
719 * @fmt: pointer to v4l2_format structure
721 * validate and set the format on video device
723 * Return 0 on success, error code otherwise
725 static int vpfe_s_fmt(struct file
*file
, void *priv
,
726 struct v4l2_format
*fmt
)
728 struct vpfe_video_device
*video
= video_drvdata(file
);
729 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
730 struct v4l2_format format
;
733 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_fmt\n");
734 /* If streaming is started, return error */
735 if (video
->started
) {
736 v4l2_err(&vpfe_dev
->v4l2_dev
, "Streaming is started\n");
739 /* get adjacent subdev's output pad format */
740 ret
= __vpfe_video_get_format(video
, &format
);
749 * vpfe_try_fmt() - try the format on video device
750 * @file: file pointer
751 * @priv: void pointer
752 * @fmt: pointer to v4l2_format structure
754 * validate the format, update with correct format
755 * based on output format set on adjacent subdev
757 * Return 0 on success, error code otherwise
759 static int vpfe_try_fmt(struct file
*file
, void *priv
,
760 struct v4l2_format
*fmt
)
762 struct vpfe_video_device
*video
= video_drvdata(file
);
763 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
764 struct v4l2_format format
;
767 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_try_fmt\n");
768 /* get adjacent subdev's output pad format */
769 ret
= __vpfe_video_get_format(video
, &format
);
778 * vpfe_enum_input() - enum inputs supported on media chain
779 * @file: file pointer
780 * @priv: void pointer
781 * @fmt: pointer to v4l2_fmtdesc structure
783 * fills v4l2_input structure with input available on media chain,
784 * only one input is enumearted as media chain is setup by this time
786 * Return 0 if successful, -EINVAL is media chain is invalid
788 static int vpfe_enum_input(struct file
*file
, void *priv
,
789 struct v4l2_input
*inp
)
791 struct vpfe_video_device
*video
= video_drvdata(file
);
792 struct vpfe_ext_subdev_info
*sdinfo
= video
->current_ext_subdev
;
793 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
795 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_input\n");
796 /* enumerate from the subdev user has chosen through mc */
797 if (inp
->index
< sdinfo
->num_inputs
) {
798 memcpy(inp
, &sdinfo
->inputs
[inp
->index
],
799 sizeof(struct v4l2_input
));
806 * vpfe_g_input() - get index of the input which is active
807 * @file: file pointer
808 * @priv: void pointer
809 * @index: pointer to unsigned int
811 * set index with input index which is active
813 static int vpfe_g_input(struct file
*file
, void *priv
, unsigned int *index
)
815 struct vpfe_video_device
*video
= video_drvdata(file
);
816 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
818 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_input\n");
820 *index
= video
->current_input
;
825 * vpfe_s_input() - set input which is pointed by input index
826 * @file: file pointer
827 * @priv: void pointer
828 * @index: pointer to unsigned int
830 * set input on external subdev
832 * Return 0 on success, error code otherwise
834 static int vpfe_s_input(struct file
*file
, void *priv
, unsigned int index
)
836 struct vpfe_video_device
*video
= video_drvdata(file
);
837 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
838 struct vpfe_ext_subdev_info
*sdinfo
;
839 struct vpfe_route
*route
;
840 struct v4l2_input
*inps
;
846 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_input\n");
848 ret
= mutex_lock_interruptible(&video
->lock
);
852 * If streaming is started return device busy
855 if (video
->started
) {
856 v4l2_err(&vpfe_dev
->v4l2_dev
, "Streaming is on\n");
861 sdinfo
= video
->current_ext_subdev
;
862 if (!sdinfo
->registered
) {
866 if (vpfe_dev
->cfg
->setup_input
&&
867 vpfe_dev
->cfg
->setup_input(sdinfo
->grp_id
) < 0) {
869 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
870 "couldn't setup input for %s\n",
871 sdinfo
->module_name
);
874 route
= &sdinfo
->routes
[index
];
875 if (route
&& sdinfo
->can_route
) {
876 input
= route
->input
;
877 output
= route
->output
;
878 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
,
879 sdinfo
->grp_id
, video
,
880 s_routing
, input
, output
, 0);
882 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
883 "s_input:error in setting input in decoder\n");
888 /* set standards set by subdev in video device */
889 for (i
= 0; i
< sdinfo
->num_inputs
; i
++) {
890 inps
= &sdinfo
->inputs
[i
];
891 video
->video_dev
.tvnorms
|= inps
->std
;
893 video
->current_input
= index
;
895 mutex_unlock(&video
->lock
);
900 * vpfe_querystd() - query std which is being input on external subdev
901 * @file: file pointer
902 * @priv: void pointer
903 * @std_id: pointer to v4l2_std_id structure
905 * call external subdev through v4l2_device_call_until_err to
906 * get the std that is being active.
908 * Return 0 on success, error code otherwise
910 static int vpfe_querystd(struct file
*file
, void *priv
, v4l2_std_id
*std_id
)
912 struct vpfe_video_device
*video
= video_drvdata(file
);
913 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
914 struct vpfe_ext_subdev_info
*sdinfo
;
917 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querystd\n");
919 ret
= mutex_lock_interruptible(&video
->lock
);
920 sdinfo
= video
->current_ext_subdev
;
923 /* Call querystd function of decoder device */
924 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
, sdinfo
->grp_id
,
925 video
, querystd
, std_id
);
926 mutex_unlock(&video
->lock
);
931 * vpfe_s_std() - set std on external subdev
932 * @file: file pointer
933 * @priv: void pointer
934 * @std_id: pointer to v4l2_std_id structure
936 * set std pointed by std_id on external subdev by calling it using
937 * v4l2_device_call_until_err
939 * Return 0 on success, error code otherwise
941 static int vpfe_s_std(struct file
*file
, void *priv
, v4l2_std_id std_id
)
943 struct vpfe_video_device
*video
= video_drvdata(file
);
944 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
945 struct vpfe_ext_subdev_info
*sdinfo
;
948 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_std\n");
950 /* Call decoder driver function to set the standard */
951 ret
= mutex_lock_interruptible(&video
->lock
);
954 sdinfo
= video
->current_ext_subdev
;
955 /* If streaming is started, return device busy error */
956 if (video
->started
) {
957 v4l2_err(&vpfe_dev
->v4l2_dev
, "streaming is started\n");
961 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
, sdinfo
->grp_id
,
962 video
, s_std
, std_id
);
964 v4l2_err(&vpfe_dev
->v4l2_dev
, "Failed to set standard\n");
965 video
->stdid
= V4L2_STD_UNKNOWN
;
968 video
->stdid
= std_id
;
970 mutex_unlock(&video
->lock
);
974 static int vpfe_g_std(struct file
*file
, void *priv
, v4l2_std_id
*tvnorm
)
976 struct vpfe_video_device
*video
= video_drvdata(file
);
977 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
979 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_std\n");
980 *tvnorm
= video
->stdid
;
985 * vpfe_enum_dv_timings() - enumerate dv_timings which are supported by
987 * @file: file pointer
988 * @priv: void pointer
989 * @timings: pointer to v4l2_enum_dv_timings structure
991 * enum dv_timings's which are supported by external subdev through
994 * Return 0 on success, error code otherwise
997 vpfe_enum_dv_timings(struct file
*file
, void *fh
,
998 struct v4l2_enum_dv_timings
*timings
)
1000 struct vpfe_video_device
*video
= video_drvdata(file
);
1001 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1002 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1006 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_dv_timings\n");
1007 return v4l2_subdev_call(subdev
, pad
, enum_dv_timings
, timings
);
1011 * vpfe_query_dv_timings() - query the dv_timings which is being input
1012 * to external subdev
1013 * @file: file pointer
1014 * @priv: void pointer
1015 * @timings: pointer to v4l2_dv_timings structure
1017 * get dv_timings which is being input on external subdev through
1020 * Return 0 on success, error code otherwise
1023 vpfe_query_dv_timings(struct file
*file
, void *fh
,
1024 struct v4l2_dv_timings
*timings
)
1026 struct vpfe_video_device
*video
= video_drvdata(file
);
1027 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1028 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1030 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_query_dv_timings\n");
1031 return v4l2_subdev_call(subdev
, video
, query_dv_timings
, timings
);
1035 * vpfe_s_dv_timings() - set dv_timings on external subdev
1036 * @file: file pointer
1037 * @priv: void pointer
1038 * @timings: pointer to v4l2_dv_timings structure
1040 * set dv_timings pointed by timings on external subdev through
1041 * v4l2_device_call_until_err, this configures amplifier also
1043 * Return 0 on success, error code otherwise
1046 vpfe_s_dv_timings(struct file
*file
, void *fh
,
1047 struct v4l2_dv_timings
*timings
)
1049 struct vpfe_video_device
*video
= video_drvdata(file
);
1050 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1052 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_dv_timings\n");
1054 video
->stdid
= V4L2_STD_UNKNOWN
;
1055 return v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
,
1056 video
->current_ext_subdev
->grp_id
,
1057 video
, s_dv_timings
, timings
);
1061 * vpfe_g_dv_timings() - get dv_timings which is set on external subdev
1062 * @file: file pointer
1063 * @priv: void pointer
1064 * @timings: pointer to v4l2_dv_timings structure
1066 * get dv_timings which is set on external subdev through
1069 * Return 0 on success, error code otherwise
1072 vpfe_g_dv_timings(struct file
*file
, void *fh
,
1073 struct v4l2_dv_timings
*timings
)
1075 struct vpfe_video_device
*video
= video_drvdata(file
);
1076 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1077 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1079 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_dv_timings\n");
1080 return v4l2_subdev_call(subdev
, video
, g_dv_timings
, timings
);
1084 * Videobuf operations
1087 * vpfe_buffer_queue_setup : Callback function for buffer setup.
1088 * @vq: vb2_queue ptr
1090 * @nbuffers: ptr to number of buffers requested by application
1091 * @nplanes:: contains number of distinct video planes needed to hold a frame
1092 * @sizes[]: contains the size (in bytes) of each plane.
1093 * @alloc_devs: ptr to allocation context
1095 * This callback function is called when reqbuf() is called to adjust
1096 * the buffer nbuffers and buffer size
1099 vpfe_buffer_queue_setup(struct vb2_queue
*vq
,
1100 unsigned int *nbuffers
, unsigned int *nplanes
,
1101 unsigned int sizes
[], struct device
*alloc_devs
[])
1103 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1104 struct vpfe_video_device
*video
= fh
->video
;
1105 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1108 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buffer_queue_setup\n");
1109 size
= video
->fmt
.fmt
.pix
.sizeimage
;
1111 if (vq
->num_buffers
+ *nbuffers
< 3)
1112 *nbuffers
= 3 - vq
->num_buffers
;
1116 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
1117 "nbuffers=%d, size=%lu\n", *nbuffers
, size
);
1122 * vpfe_buffer_prepare : callback function for buffer prepare
1123 * @vb: ptr to vb2_buffer
1125 * This is the callback function for buffer prepare when vb2_qbuf()
1126 * function is called. The buffer is prepared and user space virtual address
1127 * or user address is converted into physical address
1129 static int vpfe_buffer_prepare(struct vb2_buffer
*vb
)
1131 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1132 struct vpfe_video_device
*video
= fh
->video
;
1133 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1136 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buffer_prepare\n");
1138 if (vb
->state
!= VB2_BUF_STATE_ACTIVE
&&
1139 vb
->state
!= VB2_BUF_STATE_PREPARED
)
1142 /* Initialize buffer */
1143 vb2_set_plane_payload(vb
, 0, video
->fmt
.fmt
.pix
.sizeimage
);
1144 if (vb2_plane_vaddr(vb
, 0) &&
1145 vb2_get_plane_payload(vb
, 0) > vb2_plane_size(vb
, 0))
1148 addr
= vb2_dma_contig_plane_dma_addr(vb
, 0);
1149 /* Make sure user addresses are aligned to 32 bytes */
1150 if (!ALIGN(addr
, 32))
1156 static void vpfe_buffer_queue(struct vb2_buffer
*vb
)
1158 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1159 /* Get the file handle object and device object */
1160 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1161 struct vpfe_video_device
*video
= fh
->video
;
1162 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1163 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1164 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1165 struct vpfe_cap_buffer
, vb
);
1166 unsigned long flags
;
1167 unsigned long empty
;
1170 spin_lock_irqsave(&video
->dma_queue_lock
, flags
);
1171 empty
= list_empty(&video
->dma_queue
);
1172 /* add the buffer to the DMA queue */
1173 list_add_tail(&buf
->list
, &video
->dma_queue
);
1174 spin_unlock_irqrestore(&video
->dma_queue_lock
, flags
);
1175 /* this case happens in case of single shot */
1176 if (empty
&& video
->started
&& pipe
->state
==
1177 VPFE_PIPELINE_STREAM_SINGLESHOT
&&
1178 video
->state
== VPFE_VIDEO_BUFFER_NOT_QUEUED
) {
1179 spin_lock(&video
->dma_queue_lock
);
1180 addr
= vpfe_video_get_next_buffer(video
);
1181 video
->ops
->queue(vpfe_dev
, addr
);
1183 video
->state
= VPFE_VIDEO_BUFFER_QUEUED
;
1184 spin_unlock(&video
->dma_queue_lock
);
1186 /* enable h/w each time in single shot */
1187 if (vpfe_video_is_pipe_ready(pipe
))
1188 vpfe_pipeline_set_stream(pipe
,
1189 VPFE_PIPELINE_STREAM_SINGLESHOT
);
1193 /* vpfe_start_capture() - start streaming on all the subdevs */
1194 static int vpfe_start_capture(struct vpfe_video_device
*video
)
1196 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1200 if (vpfe_video_is_pipe_ready(pipe
))
1201 ret
= vpfe_pipeline_set_stream(pipe
, pipe
->state
);
1206 static int vpfe_start_streaming(struct vb2_queue
*vq
, unsigned int count
)
1208 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1209 struct vpfe_video_device
*video
= fh
->video
;
1210 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1214 ret
= mutex_lock_interruptible(&video
->lock
);
1218 /* Get the next frame from the buffer queue */
1219 video
->cur_frm
= video
->next_frm
=
1220 list_entry(video
->dma_queue
.next
, struct vpfe_cap_buffer
, list
);
1221 /* Remove buffer from the buffer queue */
1222 list_del(&video
->cur_frm
->list
);
1223 /* Mark state of the current frame to active */
1224 video
->cur_frm
->vb
.vb2_buf
.state
= VB2_BUF_STATE_ACTIVE
;
1225 /* Initialize field_id and started member */
1226 video
->field_id
= 0;
1227 addr
= vb2_dma_contig_plane_dma_addr(&video
->cur_frm
->vb
.vb2_buf
, 0);
1228 video
->ops
->queue(vpfe_dev
, addr
);
1229 video
->state
= VPFE_VIDEO_BUFFER_QUEUED
;
1231 ret
= vpfe_start_capture(video
);
1233 struct vpfe_cap_buffer
*buf
, *tmp
;
1235 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1236 VB2_BUF_STATE_QUEUED
);
1237 list_for_each_entry_safe(buf
, tmp
, &video
->dma_queue
, list
) {
1238 list_del(&buf
->list
);
1239 vb2_buffer_done(&buf
->vb
.vb2_buf
,
1240 VB2_BUF_STATE_QUEUED
);
1245 mutex_unlock(&video
->lock
);
1249 mutex_unlock(&video
->lock
);
1251 ret
= vb2_streamoff(&video
->buffer_queue
, video
->buffer_queue
.type
);
1255 static int vpfe_buffer_init(struct vb2_buffer
*vb
)
1257 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1258 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1259 struct vpfe_cap_buffer
, vb
);
1261 INIT_LIST_HEAD(&buf
->list
);
1265 /* abort streaming and wait for last buffer */
1266 static void vpfe_stop_streaming(struct vb2_queue
*vq
)
1268 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1269 struct vpfe_video_device
*video
= fh
->video
;
1271 /* release all active buffers */
1272 if (video
->cur_frm
== video
->next_frm
) {
1273 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1274 VB2_BUF_STATE_ERROR
);
1276 if (video
->cur_frm
!= NULL
)
1277 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1278 VB2_BUF_STATE_ERROR
);
1279 if (video
->next_frm
!= NULL
)
1280 vb2_buffer_done(&video
->next_frm
->vb
.vb2_buf
,
1281 VB2_BUF_STATE_ERROR
);
1284 while (!list_empty(&video
->dma_queue
)) {
1285 video
->next_frm
= list_entry(video
->dma_queue
.next
,
1286 struct vpfe_cap_buffer
, list
);
1287 list_del(&video
->next_frm
->list
);
1288 vb2_buffer_done(&video
->next_frm
->vb
.vb2_buf
,
1289 VB2_BUF_STATE_ERROR
);
1293 static void vpfe_buf_cleanup(struct vb2_buffer
*vb
)
1295 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1296 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1297 struct vpfe_video_device
*video
= fh
->video
;
1298 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1299 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1300 struct vpfe_cap_buffer
, vb
);
1302 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buf_cleanup\n");
1303 if (vb
->state
== VB2_BUF_STATE_ACTIVE
)
1304 list_del_init(&buf
->list
);
1307 static struct vb2_ops video_qops
= {
1308 .queue_setup
= vpfe_buffer_queue_setup
,
1309 .buf_init
= vpfe_buffer_init
,
1310 .buf_prepare
= vpfe_buffer_prepare
,
1311 .start_streaming
= vpfe_start_streaming
,
1312 .stop_streaming
= vpfe_stop_streaming
,
1313 .buf_cleanup
= vpfe_buf_cleanup
,
1314 .buf_queue
= vpfe_buffer_queue
,
1318 * vpfe_reqbufs() - supported REQBUF only once opening
1321 static int vpfe_reqbufs(struct file
*file
, void *priv
,
1322 struct v4l2_requestbuffers
*req_buf
)
1324 struct vpfe_video_device
*video
= video_drvdata(file
);
1325 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1326 struct vpfe_fh
*fh
= file
->private_data
;
1327 struct vb2_queue
*q
;
1330 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_reqbufs\n");
1332 if (req_buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1333 req_buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
){
1334 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buffer type\n");
1338 ret
= mutex_lock_interruptible(&video
->lock
);
1342 if (video
->io_usrs
!= 0) {
1343 v4l2_err(&vpfe_dev
->v4l2_dev
, "Only one IO user allowed\n");
1347 video
->memory
= req_buf
->memory
;
1349 /* Initialize videobuf2 queue as per the buffer type */
1350 q
= &video
->buffer_queue
;
1351 q
->type
= req_buf
->type
;
1352 q
->io_modes
= VB2_MMAP
| VB2_USERPTR
;
1354 q
->min_buffers_needed
= 1;
1355 q
->ops
= &video_qops
;
1356 q
->mem_ops
= &vb2_dma_contig_memops
;
1357 q
->buf_struct_size
= sizeof(struct vpfe_cap_buffer
);
1358 q
->timestamp_flags
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
1359 q
->dev
= vpfe_dev
->pdev
;
1361 ret
= vb2_queue_init(q
);
1363 v4l2_err(&vpfe_dev
->v4l2_dev
, "vb2_queue_init() failed\n");
1369 INIT_LIST_HEAD(&video
->dma_queue
);
1370 ret
= vb2_reqbufs(&video
->buffer_queue
, req_buf
);
1373 mutex_unlock(&video
->lock
);
1378 * vpfe_querybuf() - query buffers for exchange
1380 static int vpfe_querybuf(struct file
*file
, void *priv
,
1381 struct v4l2_buffer
*buf
)
1383 struct vpfe_video_device
*video
= video_drvdata(file
);
1384 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1386 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querybuf\n");
1388 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1389 buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1390 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1394 if (video
->memory
!= V4L2_MEMORY_MMAP
) {
1395 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid memory\n");
1399 /* Call vb2_querybuf to get information */
1400 return vb2_querybuf(&video
->buffer_queue
, buf
);
1404 * vpfe_qbuf() - queue buffers for capture or processing
1406 static int vpfe_qbuf(struct file
*file
, void *priv
,
1407 struct v4l2_buffer
*p
)
1409 struct vpfe_video_device
*video
= video_drvdata(file
);
1410 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1411 struct vpfe_fh
*fh
= file
->private_data
;
1413 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_qbuf\n");
1415 if (p
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1416 p
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1417 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1421 * If this file handle is not allowed to do IO,
1424 if (!fh
->io_allowed
) {
1425 v4l2_err(&vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1429 return vb2_qbuf(&video
->buffer_queue
, p
);
1433 * vpfe_dqbuf() - deque buffer which is done with processing
1435 static int vpfe_dqbuf(struct file
*file
, void *priv
,
1436 struct v4l2_buffer
*buf
)
1438 struct vpfe_video_device
*video
= video_drvdata(file
);
1439 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1441 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_dqbuf\n");
1443 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1444 buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1445 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1449 return vb2_dqbuf(&video
->buffer_queue
,
1450 buf
, (file
->f_flags
& O_NONBLOCK
));
1454 * vpfe_streamon() - start streaming
1455 * @file: file pointer
1456 * @priv: void pointer
1457 * @buf_type: enum v4l2_buf_type
1459 * queue buffer onto hardware for capture/processing and
1460 * start all the subdevs which are in media chain
1462 * Return 0 on success, error code otherwise
1464 static int vpfe_streamon(struct file
*file
, void *priv
,
1465 enum v4l2_buf_type buf_type
)
1467 struct vpfe_video_device
*video
= video_drvdata(file
);
1468 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1469 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1470 struct vpfe_fh
*fh
= file
->private_data
;
1471 struct vpfe_ext_subdev_info
*sdinfo
;
1474 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_streamon\n");
1476 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1477 buf_type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1478 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1481 /* If file handle is not allowed IO, return error */
1482 if (!fh
->io_allowed
) {
1483 v4l2_err(&vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1486 sdinfo
= video
->current_ext_subdev
;
1487 /* If buffer queue is empty, return error */
1488 if (list_empty(&video
->buffer_queue
.queued_list
)) {
1489 v4l2_err(&vpfe_dev
->v4l2_dev
, "buffer queue is empty\n");
1492 /* Validate the pipeline */
1493 if (buf_type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1494 ret
= vpfe_video_validate_pipeline(pipe
);
1498 /* Call vb2_streamon to start streaming */
1499 return vb2_streamon(&video
->buffer_queue
, buf_type
);
1503 * vpfe_streamoff() - stop streaming
1504 * @file: file pointer
1505 * @priv: void pointer
1506 * @buf_type: enum v4l2_buf_type
1508 * stop all the subdevs which are in media chain
1510 * Return 0 on success, error code otherwise
1512 static int vpfe_streamoff(struct file
*file
, void *priv
,
1513 enum v4l2_buf_type buf_type
)
1515 struct vpfe_video_device
*video
= video_drvdata(file
);
1516 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1517 struct vpfe_fh
*fh
= file
->private_data
;
1520 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_streamoff\n");
1522 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1523 buf_type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1524 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1528 /* If io is allowed for this file handle, return error */
1529 if (!fh
->io_allowed
) {
1530 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1534 /* If streaming is not started, return error */
1535 if (!video
->started
) {
1536 v4l2_err(&vpfe_dev
->v4l2_dev
, "device is not started\n");
1540 ret
= mutex_lock_interruptible(&video
->lock
);
1544 vpfe_stop_capture(video
);
1545 ret
= vb2_streamoff(&video
->buffer_queue
, buf_type
);
1546 mutex_unlock(&video
->lock
);
1551 /* vpfe capture ioctl operations */
1552 static const struct v4l2_ioctl_ops vpfe_ioctl_ops
= {
1553 .vidioc_querycap
= vpfe_querycap
,
1554 .vidioc_g_fmt_vid_cap
= vpfe_g_fmt
,
1555 .vidioc_s_fmt_vid_cap
= vpfe_s_fmt
,
1556 .vidioc_try_fmt_vid_cap
= vpfe_try_fmt
,
1557 .vidioc_enum_fmt_vid_cap
= vpfe_enum_fmt
,
1558 .vidioc_g_fmt_vid_out
= vpfe_g_fmt
,
1559 .vidioc_s_fmt_vid_out
= vpfe_s_fmt
,
1560 .vidioc_try_fmt_vid_out
= vpfe_try_fmt
,
1561 .vidioc_enum_fmt_vid_out
= vpfe_enum_fmt
,
1562 .vidioc_enum_input
= vpfe_enum_input
,
1563 .vidioc_g_input
= vpfe_g_input
,
1564 .vidioc_s_input
= vpfe_s_input
,
1565 .vidioc_querystd
= vpfe_querystd
,
1566 .vidioc_s_std
= vpfe_s_std
,
1567 .vidioc_g_std
= vpfe_g_std
,
1568 .vidioc_enum_dv_timings
= vpfe_enum_dv_timings
,
1569 .vidioc_query_dv_timings
= vpfe_query_dv_timings
,
1570 .vidioc_s_dv_timings
= vpfe_s_dv_timings
,
1571 .vidioc_g_dv_timings
= vpfe_g_dv_timings
,
1572 .vidioc_reqbufs
= vpfe_reqbufs
,
1573 .vidioc_querybuf
= vpfe_querybuf
,
1574 .vidioc_qbuf
= vpfe_qbuf
,
1575 .vidioc_dqbuf
= vpfe_dqbuf
,
1576 .vidioc_streamon
= vpfe_streamon
,
1577 .vidioc_streamoff
= vpfe_streamoff
,
1580 /* VPFE video init function */
1581 int vpfe_video_init(struct vpfe_video_device
*video
, const char *name
)
1583 const char *direction
;
1586 switch (video
->type
) {
1587 case V4L2_BUF_TYPE_VIDEO_CAPTURE
:
1588 direction
= "output";
1589 video
->pad
.flags
= MEDIA_PAD_FL_SINK
;
1590 video
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1593 case V4L2_BUF_TYPE_VIDEO_OUTPUT
:
1594 direction
= "input";
1595 video
->pad
.flags
= MEDIA_PAD_FL_SOURCE
;
1596 video
->type
= V4L2_BUF_TYPE_VIDEO_OUTPUT
;
1602 /* Initialize field of video device */
1603 video
->video_dev
.release
= video_device_release
;
1604 video
->video_dev
.fops
= &vpfe_fops
;
1605 video
->video_dev
.ioctl_ops
= &vpfe_ioctl_ops
;
1606 video
->video_dev
.minor
= -1;
1607 video
->video_dev
.tvnorms
= 0;
1608 snprintf(video
->video_dev
.name
, sizeof(video
->video_dev
.name
),
1609 "DAVINCI VIDEO %s %s", name
, direction
);
1611 spin_lock_init(&video
->irqlock
);
1612 spin_lock_init(&video
->dma_queue_lock
);
1613 mutex_init(&video
->lock
);
1614 ret
= media_entity_pads_init(&video
->video_dev
.entity
,
1619 video_set_drvdata(&video
->video_dev
, video
);
1624 /* vpfe video device register function */
1625 int vpfe_video_register(struct vpfe_video_device
*video
,
1626 struct v4l2_device
*vdev
)
1630 video
->video_dev
.v4l2_dev
= vdev
;
1632 ret
= video_register_device(&video
->video_dev
, VFL_TYPE_GRABBER
, -1);
1634 pr_err("%s: could not register video device (%d)\n",
1639 /* vpfe video device unregister function */
1640 void vpfe_video_unregister(struct vpfe_video_device
*video
)
1642 if (video_is_registered(&video
->video_dev
)) {
1643 video_unregister_device(&video
->video_dev
);
1644 media_entity_cleanup(&video
->video_dev
.entity
);