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_io(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
);
545 vb2_dma_contig_cleanup_ctx(video
->alloc_ctx
);
547 /* Decrement device users counter */
549 v4l2_fh_del(&fh
->vfh
);
550 v4l2_fh_exit(&fh
->vfh
);
551 /* If this is the last file handle */
553 video
->initialized
= 0;
554 mutex_unlock(&video
->lock
);
555 file
->private_data
= NULL
;
556 /* Free memory allocated to file handle object */
563 * vpfe_mmap() - It is used to map kernel space buffers
566 static int vpfe_mmap(struct file
*file
, struct vm_area_struct
*vma
)
568 struct vpfe_video_device
*video
= video_drvdata(file
);
569 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
571 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_mmap\n");
572 return vb2_mmap(&video
->buffer_queue
, vma
);
576 * vpfe_poll() - It is used for select/poll system call
578 static unsigned int vpfe_poll(struct file
*file
, poll_table
*wait
)
580 struct vpfe_video_device
*video
= video_drvdata(file
);
581 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
583 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_poll\n");
585 return vb2_poll(&video
->buffer_queue
, file
, wait
);
589 /* vpfe capture driver file operations */
590 static const struct v4l2_file_operations vpfe_fops
= {
591 .owner
= THIS_MODULE
,
593 .release
= vpfe_release
,
594 .unlocked_ioctl
= video_ioctl2
,
600 * vpfe_querycap() - query capabilities of video device
601 * @file: file pointer
602 * @priv: void pointer
603 * @cap: pointer to v4l2_capability structure
605 * fills v4l2 capabilities structure
609 static int vpfe_querycap(struct file
*file
, void *priv
,
610 struct v4l2_capability
*cap
)
612 struct vpfe_video_device
*video
= video_drvdata(file
);
613 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
615 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querycap\n");
617 if (video
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
)
618 cap
->device_caps
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
620 cap
->device_caps
= V4L2_CAP_VIDEO_OUTPUT
| V4L2_CAP_STREAMING
;
621 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_VIDEO_OUTPUT
|
622 V4L2_CAP_STREAMING
| V4L2_CAP_DEVICE_CAPS
;
623 strlcpy(cap
->driver
, CAPTURE_DRV_NAME
, sizeof(cap
->driver
));
624 strlcpy(cap
->bus_info
, "VPFE", sizeof(cap
->bus_info
));
625 strlcpy(cap
->card
, vpfe_dev
->cfg
->card_name
, sizeof(cap
->card
));
631 * vpfe_g_fmt() - get the format which is active on video device
632 * @file: file pointer
633 * @priv: void pointer
634 * @fmt: pointer to v4l2_format structure
636 * fills v4l2 format structure with active format
640 static int vpfe_g_fmt(struct file
*file
, void *priv
,
641 struct v4l2_format
*fmt
)
643 struct vpfe_video_device
*video
= video_drvdata(file
);
644 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
646 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_fmt\n");
647 /* Fill in the information about format */
653 * vpfe_enum_fmt() - enum formats supported on media chain
654 * @file: file pointer
655 * @priv: void pointer
656 * @fmt: pointer to v4l2_fmtdesc structure
658 * fills v4l2_fmtdesc structure with output format set on adjacent subdev,
659 * only one format is enumearted as subdevs are already configured
661 * Return 0 if successful, error code otherwise
663 static int vpfe_enum_fmt(struct file
*file
, void *priv
,
664 struct v4l2_fmtdesc
*fmt
)
666 struct vpfe_video_device
*video
= video_drvdata(file
);
667 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
668 struct v4l2_subdev_format sd_fmt
;
669 struct v4l2_mbus_framefmt mbus
;
670 struct v4l2_subdev
*subdev
;
671 struct v4l2_format format
;
672 struct media_pad
*remote
;
675 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_fmt\n");
678 * since already subdev pad format is set,
679 * only one pixel format is available
681 if (fmt
->index
> 0) {
682 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid index\n");
685 /* get the remote pad */
686 remote
= media_entity_remote_pad(&video
->pad
);
687 if (remote
== NULL
) {
688 v4l2_err(&vpfe_dev
->v4l2_dev
,
689 "invalid remote pad for video node\n");
692 /* get the remote subdev */
693 subdev
= vpfe_video_remote_subdev(video
, NULL
);
694 if (subdev
== NULL
) {
695 v4l2_err(&vpfe_dev
->v4l2_dev
,
696 "invalid remote subdev for video node\n");
699 sd_fmt
.pad
= remote
->index
;
700 sd_fmt
.which
= V4L2_SUBDEV_FORMAT_ACTIVE
;
701 /* get output format of remote subdev */
702 ret
= v4l2_subdev_call(subdev
, pad
, get_fmt
, NULL
, &sd_fmt
);
704 v4l2_err(&vpfe_dev
->v4l2_dev
,
705 "invalid remote subdev for video node\n");
708 /* convert to pix format */
709 mbus
.code
= sd_fmt
.format
.code
;
710 mbus_to_pix(&mbus
, &format
.fmt
.pix
);
711 /* copy the result */
712 fmt
->pixelformat
= format
.fmt
.pix
.pixelformat
;
718 * vpfe_s_fmt() - set the format on video device
719 * @file: file pointer
720 * @priv: void pointer
721 * @fmt: pointer to v4l2_format structure
723 * validate and set the format on video device
725 * Return 0 on success, error code otherwise
727 static int vpfe_s_fmt(struct file
*file
, void *priv
,
728 struct v4l2_format
*fmt
)
730 struct vpfe_video_device
*video
= video_drvdata(file
);
731 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
732 struct v4l2_format format
;
735 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_fmt\n");
736 /* If streaming is started, return error */
737 if (video
->started
) {
738 v4l2_err(&vpfe_dev
->v4l2_dev
, "Streaming is started\n");
741 /* get adjacent subdev's output pad format */
742 ret
= __vpfe_video_get_format(video
, &format
);
751 * vpfe_try_fmt() - try the format on video device
752 * @file: file pointer
753 * @priv: void pointer
754 * @fmt: pointer to v4l2_format structure
756 * validate the format, update with correct format
757 * based on output format set on adjacent subdev
759 * Return 0 on success, error code otherwise
761 static int vpfe_try_fmt(struct file
*file
, void *priv
,
762 struct v4l2_format
*fmt
)
764 struct vpfe_video_device
*video
= video_drvdata(file
);
765 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
766 struct v4l2_format format
;
769 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_try_fmt\n");
770 /* get adjacent subdev's output pad format */
771 ret
= __vpfe_video_get_format(video
, &format
);
780 * vpfe_enum_input() - enum inputs supported on media chain
781 * @file: file pointer
782 * @priv: void pointer
783 * @fmt: pointer to v4l2_fmtdesc structure
785 * fills v4l2_input structure with input available on media chain,
786 * only one input is enumearted as media chain is setup by this time
788 * Return 0 if successful, -EINVAL is media chain is invalid
790 static int vpfe_enum_input(struct file
*file
, void *priv
,
791 struct v4l2_input
*inp
)
793 struct vpfe_video_device
*video
= video_drvdata(file
);
794 struct vpfe_ext_subdev_info
*sdinfo
= video
->current_ext_subdev
;
795 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
797 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_input\n");
798 /* enumerate from the subdev user has chosen through mc */
799 if (inp
->index
< sdinfo
->num_inputs
) {
800 memcpy(inp
, &sdinfo
->inputs
[inp
->index
],
801 sizeof(struct v4l2_input
));
808 * vpfe_g_input() - get index of the input which is active
809 * @file: file pointer
810 * @priv: void pointer
811 * @index: pointer to unsigned int
813 * set index with input index which is active
815 static int vpfe_g_input(struct file
*file
, void *priv
, unsigned int *index
)
817 struct vpfe_video_device
*video
= video_drvdata(file
);
818 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
820 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_input\n");
822 *index
= video
->current_input
;
827 * vpfe_s_input() - set input which is pointed by input index
828 * @file: file pointer
829 * @priv: void pointer
830 * @index: pointer to unsigned int
832 * set input on external subdev
834 * Return 0 on success, error code otherwise
836 static int vpfe_s_input(struct file
*file
, void *priv
, unsigned int index
)
838 struct vpfe_video_device
*video
= video_drvdata(file
);
839 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
840 struct vpfe_ext_subdev_info
*sdinfo
;
841 struct vpfe_route
*route
;
842 struct v4l2_input
*inps
;
848 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_input\n");
850 ret
= mutex_lock_interruptible(&video
->lock
);
854 * If streaming is started return device busy
857 if (video
->started
) {
858 v4l2_err(&vpfe_dev
->v4l2_dev
, "Streaming is on\n");
863 sdinfo
= video
->current_ext_subdev
;
864 if (!sdinfo
->registered
) {
868 if (vpfe_dev
->cfg
->setup_input
&&
869 vpfe_dev
->cfg
->setup_input(sdinfo
->grp_id
) < 0) {
871 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
872 "couldn't setup input for %s\n",
873 sdinfo
->module_name
);
876 route
= &sdinfo
->routes
[index
];
877 if (route
&& sdinfo
->can_route
) {
878 input
= route
->input
;
879 output
= route
->output
;
880 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
,
881 sdinfo
->grp_id
, video
,
882 s_routing
, input
, output
, 0);
884 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
885 "s_input:error in setting input in decoder\n");
890 /* set standards set by subdev in video device */
891 for (i
= 0; i
< sdinfo
->num_inputs
; i
++) {
892 inps
= &sdinfo
->inputs
[i
];
893 video
->video_dev
.tvnorms
|= inps
->std
;
895 video
->current_input
= index
;
897 mutex_unlock(&video
->lock
);
902 * vpfe_querystd() - query std which is being input on external subdev
903 * @file: file pointer
904 * @priv: void pointer
905 * @std_id: pointer to v4l2_std_id structure
907 * call external subdev through v4l2_device_call_until_err to
908 * get the std that is being active.
910 * Return 0 on success, error code otherwise
912 static int vpfe_querystd(struct file
*file
, void *priv
, v4l2_std_id
*std_id
)
914 struct vpfe_video_device
*video
= video_drvdata(file
);
915 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
916 struct vpfe_ext_subdev_info
*sdinfo
;
919 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querystd\n");
921 ret
= mutex_lock_interruptible(&video
->lock
);
922 sdinfo
= video
->current_ext_subdev
;
925 /* Call querystd function of decoder device */
926 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
, sdinfo
->grp_id
,
927 video
, querystd
, std_id
);
928 mutex_unlock(&video
->lock
);
933 * vpfe_s_std() - set std on external subdev
934 * @file: file pointer
935 * @priv: void pointer
936 * @std_id: pointer to v4l2_std_id structure
938 * set std pointed by std_id on external subdev by calling it using
939 * v4l2_device_call_until_err
941 * Return 0 on success, error code otherwise
943 static int vpfe_s_std(struct file
*file
, void *priv
, v4l2_std_id std_id
)
945 struct vpfe_video_device
*video
= video_drvdata(file
);
946 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
947 struct vpfe_ext_subdev_info
*sdinfo
;
950 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_std\n");
952 /* Call decoder driver function to set the standard */
953 ret
= mutex_lock_interruptible(&video
->lock
);
956 sdinfo
= video
->current_ext_subdev
;
957 /* If streaming is started, return device busy error */
958 if (video
->started
) {
959 v4l2_err(&vpfe_dev
->v4l2_dev
, "streaming is started\n");
963 ret
= v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
, sdinfo
->grp_id
,
964 video
, s_std
, std_id
);
966 v4l2_err(&vpfe_dev
->v4l2_dev
, "Failed to set standard\n");
967 video
->stdid
= V4L2_STD_UNKNOWN
;
970 video
->stdid
= std_id
;
972 mutex_unlock(&video
->lock
);
976 static int vpfe_g_std(struct file
*file
, void *priv
, v4l2_std_id
*tvnorm
)
978 struct vpfe_video_device
*video
= video_drvdata(file
);
979 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
981 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_std\n");
982 *tvnorm
= video
->stdid
;
987 * vpfe_enum_dv_timings() - enumerate dv_timings which are supported by
989 * @file: file pointer
990 * @priv: void pointer
991 * @timings: pointer to v4l2_enum_dv_timings structure
993 * enum dv_timings's which are supported by external subdev through
996 * Return 0 on success, error code otherwise
999 vpfe_enum_dv_timings(struct file
*file
, void *fh
,
1000 struct v4l2_enum_dv_timings
*timings
)
1002 struct vpfe_video_device
*video
= video_drvdata(file
);
1003 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1004 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1008 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_enum_dv_timings\n");
1009 return v4l2_subdev_call(subdev
, pad
, enum_dv_timings
, timings
);
1013 * vpfe_query_dv_timings() - query the dv_timings which is being input
1014 * to external subdev
1015 * @file: file pointer
1016 * @priv: void pointer
1017 * @timings: pointer to v4l2_dv_timings structure
1019 * get dv_timings which is being input on external subdev through
1022 * Return 0 on success, error code otherwise
1025 vpfe_query_dv_timings(struct file
*file
, void *fh
,
1026 struct v4l2_dv_timings
*timings
)
1028 struct vpfe_video_device
*video
= video_drvdata(file
);
1029 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1030 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1032 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_query_dv_timings\n");
1033 return v4l2_subdev_call(subdev
, video
, query_dv_timings
, timings
);
1037 * vpfe_s_dv_timings() - set dv_timings on external subdev
1038 * @file: file pointer
1039 * @priv: void pointer
1040 * @timings: pointer to v4l2_dv_timings structure
1042 * set dv_timings pointed by timings on external subdev through
1043 * v4l2_device_call_until_err, this configures amplifier also
1045 * Return 0 on success, error code otherwise
1048 vpfe_s_dv_timings(struct file
*file
, void *fh
,
1049 struct v4l2_dv_timings
*timings
)
1051 struct vpfe_video_device
*video
= video_drvdata(file
);
1052 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1054 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_s_dv_timings\n");
1056 video
->stdid
= V4L2_STD_UNKNOWN
;
1057 return v4l2_device_call_until_err(&vpfe_dev
->v4l2_dev
,
1058 video
->current_ext_subdev
->grp_id
,
1059 video
, s_dv_timings
, timings
);
1063 * vpfe_g_dv_timings() - get dv_timings which is set on external subdev
1064 * @file: file pointer
1065 * @priv: void pointer
1066 * @timings: pointer to v4l2_dv_timings structure
1068 * get dv_timings which is set on external subdev through
1071 * Return 0 on success, error code otherwise
1074 vpfe_g_dv_timings(struct file
*file
, void *fh
,
1075 struct v4l2_dv_timings
*timings
)
1077 struct vpfe_video_device
*video
= video_drvdata(file
);
1078 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1079 struct v4l2_subdev
*subdev
= video
->current_ext_subdev
->subdev
;
1081 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_g_dv_timings\n");
1082 return v4l2_subdev_call(subdev
, video
, g_dv_timings
, timings
);
1086 * Videobuf operations
1089 * vpfe_buffer_queue_setup : Callback function for buffer setup.
1090 * @vq: vb2_queue ptr
1092 * @nbuffers: ptr to number of buffers requested by application
1093 * @nplanes:: contains number of distinct video planes needed to hold a frame
1094 * @sizes[]: contains the size (in bytes) of each plane.
1095 * @alloc_ctxs: ptr to allocation context
1097 * This callback function is called when reqbuf() is called to adjust
1098 * the buffer nbuffers and buffer size
1101 vpfe_buffer_queue_setup(struct vb2_queue
*vq
,
1102 unsigned int *nbuffers
, unsigned int *nplanes
,
1103 unsigned int sizes
[], void *alloc_ctxs
[])
1105 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1106 struct vpfe_video_device
*video
= fh
->video
;
1107 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1110 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buffer_queue_setup\n");
1111 size
= video
->fmt
.fmt
.pix
.sizeimage
;
1113 if (vq
->num_buffers
+ *nbuffers
< 3)
1114 *nbuffers
= 3 - vq
->num_buffers
;
1118 alloc_ctxs
[0] = video
->alloc_ctx
;
1119 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
,
1120 "nbuffers=%d, size=%lu\n", *nbuffers
, size
);
1125 * vpfe_buffer_prepare : callback function for buffer prepare
1126 * @vb: ptr to vb2_buffer
1128 * This is the callback function for buffer prepare when vb2_qbuf()
1129 * function is called. The buffer is prepared and user space virtual address
1130 * or user address is converted into physical address
1132 static int vpfe_buffer_prepare(struct vb2_buffer
*vb
)
1134 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1135 struct vpfe_video_device
*video
= fh
->video
;
1136 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1139 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buffer_prepare\n");
1141 if (vb
->state
!= VB2_BUF_STATE_ACTIVE
&&
1142 vb
->state
!= VB2_BUF_STATE_PREPARED
)
1145 /* Initialize buffer */
1146 vb2_set_plane_payload(vb
, 0, video
->fmt
.fmt
.pix
.sizeimage
);
1147 if (vb2_plane_vaddr(vb
, 0) &&
1148 vb2_get_plane_payload(vb
, 0) > vb2_plane_size(vb
, 0))
1151 addr
= vb2_dma_contig_plane_dma_addr(vb
, 0);
1152 /* Make sure user addresses are aligned to 32 bytes */
1153 if (!ALIGN(addr
, 32))
1159 static void vpfe_buffer_queue(struct vb2_buffer
*vb
)
1161 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1162 /* Get the file handle object and device object */
1163 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1164 struct vpfe_video_device
*video
= fh
->video
;
1165 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1166 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1167 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1168 struct vpfe_cap_buffer
, vb
);
1169 unsigned long flags
;
1170 unsigned long empty
;
1173 spin_lock_irqsave(&video
->dma_queue_lock
, flags
);
1174 empty
= list_empty(&video
->dma_queue
);
1175 /* add the buffer to the DMA queue */
1176 list_add_tail(&buf
->list
, &video
->dma_queue
);
1177 spin_unlock_irqrestore(&video
->dma_queue_lock
, flags
);
1178 /* this case happens in case of single shot */
1179 if (empty
&& video
->started
&& pipe
->state
==
1180 VPFE_PIPELINE_STREAM_SINGLESHOT
&&
1181 video
->state
== VPFE_VIDEO_BUFFER_NOT_QUEUED
) {
1182 spin_lock(&video
->dma_queue_lock
);
1183 addr
= vpfe_video_get_next_buffer(video
);
1184 video
->ops
->queue(vpfe_dev
, addr
);
1186 video
->state
= VPFE_VIDEO_BUFFER_QUEUED
;
1187 spin_unlock(&video
->dma_queue_lock
);
1189 /* enable h/w each time in single shot */
1190 if (vpfe_video_is_pipe_ready(pipe
))
1191 vpfe_pipeline_set_stream(pipe
,
1192 VPFE_PIPELINE_STREAM_SINGLESHOT
);
1196 /* vpfe_start_capture() - start streaming on all the subdevs */
1197 static int vpfe_start_capture(struct vpfe_video_device
*video
)
1199 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1203 if (vpfe_video_is_pipe_ready(pipe
))
1204 ret
= vpfe_pipeline_set_stream(pipe
, pipe
->state
);
1209 static int vpfe_start_streaming(struct vb2_queue
*vq
, unsigned int count
)
1211 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1212 struct vpfe_video_device
*video
= fh
->video
;
1213 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1217 ret
= mutex_lock_interruptible(&video
->lock
);
1221 /* Get the next frame from the buffer queue */
1222 video
->cur_frm
= video
->next_frm
=
1223 list_entry(video
->dma_queue
.next
, struct vpfe_cap_buffer
, list
);
1224 /* Remove buffer from the buffer queue */
1225 list_del(&video
->cur_frm
->list
);
1226 /* Mark state of the current frame to active */
1227 video
->cur_frm
->vb
.vb2_buf
.state
= VB2_BUF_STATE_ACTIVE
;
1228 /* Initialize field_id and started member */
1229 video
->field_id
= 0;
1230 addr
= vb2_dma_contig_plane_dma_addr(&video
->cur_frm
->vb
.vb2_buf
, 0);
1231 video
->ops
->queue(vpfe_dev
, addr
);
1232 video
->state
= VPFE_VIDEO_BUFFER_QUEUED
;
1234 ret
= vpfe_start_capture(video
);
1236 struct vpfe_cap_buffer
*buf
, *tmp
;
1238 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1239 VB2_BUF_STATE_QUEUED
);
1240 list_for_each_entry_safe(buf
, tmp
, &video
->dma_queue
, list
) {
1241 list_del(&buf
->list
);
1242 vb2_buffer_done(&buf
->vb
.vb2_buf
,
1243 VB2_BUF_STATE_QUEUED
);
1248 mutex_unlock(&video
->lock
);
1252 mutex_unlock(&video
->lock
);
1254 ret
= vb2_streamoff(&video
->buffer_queue
, video
->buffer_queue
.type
);
1258 static int vpfe_buffer_init(struct vb2_buffer
*vb
)
1260 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1261 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1262 struct vpfe_cap_buffer
, vb
);
1264 INIT_LIST_HEAD(&buf
->list
);
1268 /* abort streaming and wait for last buffer */
1269 static void vpfe_stop_streaming(struct vb2_queue
*vq
)
1271 struct vpfe_fh
*fh
= vb2_get_drv_priv(vq
);
1272 struct vpfe_video_device
*video
= fh
->video
;
1274 /* release all active buffers */
1275 if (video
->cur_frm
== video
->next_frm
) {
1276 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1277 VB2_BUF_STATE_ERROR
);
1279 if (video
->cur_frm
!= NULL
)
1280 vb2_buffer_done(&video
->cur_frm
->vb
.vb2_buf
,
1281 VB2_BUF_STATE_ERROR
);
1282 if (video
->next_frm
!= NULL
)
1283 vb2_buffer_done(&video
->next_frm
->vb
.vb2_buf
,
1284 VB2_BUF_STATE_ERROR
);
1287 while (!list_empty(&video
->dma_queue
)) {
1288 video
->next_frm
= list_entry(video
->dma_queue
.next
,
1289 struct vpfe_cap_buffer
, list
);
1290 list_del(&video
->next_frm
->list
);
1291 vb2_buffer_done(&video
->next_frm
->vb
.vb2_buf
,
1292 VB2_BUF_STATE_ERROR
);
1296 static void vpfe_buf_cleanup(struct vb2_buffer
*vb
)
1298 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
1299 struct vpfe_fh
*fh
= vb2_get_drv_priv(vb
->vb2_queue
);
1300 struct vpfe_video_device
*video
= fh
->video
;
1301 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1302 struct vpfe_cap_buffer
*buf
= container_of(vbuf
,
1303 struct vpfe_cap_buffer
, vb
);
1305 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_buf_cleanup\n");
1306 if (vb
->state
== VB2_BUF_STATE_ACTIVE
)
1307 list_del_init(&buf
->list
);
1310 static struct vb2_ops video_qops
= {
1311 .queue_setup
= vpfe_buffer_queue_setup
,
1312 .buf_init
= vpfe_buffer_init
,
1313 .buf_prepare
= vpfe_buffer_prepare
,
1314 .start_streaming
= vpfe_start_streaming
,
1315 .stop_streaming
= vpfe_stop_streaming
,
1316 .buf_cleanup
= vpfe_buf_cleanup
,
1317 .buf_queue
= vpfe_buffer_queue
,
1321 * vpfe_reqbufs() - supported REQBUF only once opening
1324 static int vpfe_reqbufs(struct file
*file
, void *priv
,
1325 struct v4l2_requestbuffers
*req_buf
)
1327 struct vpfe_video_device
*video
= video_drvdata(file
);
1328 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1329 struct vpfe_fh
*fh
= file
->private_data
;
1330 struct vb2_queue
*q
;
1333 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_reqbufs\n");
1335 if (req_buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1336 req_buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
){
1337 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buffer type\n");
1341 ret
= mutex_lock_interruptible(&video
->lock
);
1345 if (video
->io_usrs
!= 0) {
1346 v4l2_err(&vpfe_dev
->v4l2_dev
, "Only one IO user allowed\n");
1350 video
->memory
= req_buf
->memory
;
1352 /* Initialize videobuf2 queue as per the buffer type */
1353 video
->alloc_ctx
= vb2_dma_contig_init_ctx(vpfe_dev
->pdev
);
1354 if (IS_ERR(video
->alloc_ctx
)) {
1355 v4l2_err(&vpfe_dev
->v4l2_dev
, "Failed to get the context\n");
1356 return PTR_ERR(video
->alloc_ctx
);
1359 q
= &video
->buffer_queue
;
1360 q
->type
= req_buf
->type
;
1361 q
->io_modes
= VB2_MMAP
| VB2_USERPTR
;
1363 q
->min_buffers_needed
= 1;
1364 q
->ops
= &video_qops
;
1365 q
->mem_ops
= &vb2_dma_contig_memops
;
1366 q
->buf_struct_size
= sizeof(struct vpfe_cap_buffer
);
1367 q
->timestamp_flags
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
1369 ret
= vb2_queue_init(q
);
1371 v4l2_err(&vpfe_dev
->v4l2_dev
, "vb2_queue_init() failed\n");
1372 vb2_dma_contig_cleanup_ctx(vpfe_dev
->pdev
);
1378 INIT_LIST_HEAD(&video
->dma_queue
);
1379 ret
= vb2_reqbufs(&video
->buffer_queue
, req_buf
);
1382 mutex_unlock(&video
->lock
);
1387 * vpfe_querybuf() - query buffers for exchange
1389 static int vpfe_querybuf(struct file
*file
, void *priv
,
1390 struct v4l2_buffer
*buf
)
1392 struct vpfe_video_device
*video
= video_drvdata(file
);
1393 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1395 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_querybuf\n");
1397 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1398 buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1399 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1403 if (video
->memory
!= V4L2_MEMORY_MMAP
) {
1404 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid memory\n");
1408 /* Call vb2_querybuf to get information */
1409 return vb2_querybuf(&video
->buffer_queue
, buf
);
1413 * vpfe_qbuf() - queue buffers for capture or processing
1415 static int vpfe_qbuf(struct file
*file
, void *priv
,
1416 struct v4l2_buffer
*p
)
1418 struct vpfe_video_device
*video
= video_drvdata(file
);
1419 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1420 struct vpfe_fh
*fh
= file
->private_data
;
1422 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_qbuf\n");
1424 if (p
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1425 p
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1426 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1430 * If this file handle is not allowed to do IO,
1433 if (!fh
->io_allowed
) {
1434 v4l2_err(&vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1438 return vb2_qbuf(&video
->buffer_queue
, p
);
1442 * vpfe_dqbuf() - deque buffer which is done with processing
1444 static int vpfe_dqbuf(struct file
*file
, void *priv
,
1445 struct v4l2_buffer
*buf
)
1447 struct vpfe_video_device
*video
= video_drvdata(file
);
1448 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1450 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_dqbuf\n");
1452 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1453 buf
->type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1454 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1458 return vb2_dqbuf(&video
->buffer_queue
,
1459 buf
, (file
->f_flags
& O_NONBLOCK
));
1463 * vpfe_streamon() - start streaming
1464 * @file: file pointer
1465 * @priv: void pointer
1466 * @buf_type: enum v4l2_buf_type
1468 * queue buffer onto hardware for capture/processing and
1469 * start all the subdevs which are in media chain
1471 * Return 0 on success, error code otherwise
1473 static int vpfe_streamon(struct file
*file
, void *priv
,
1474 enum v4l2_buf_type buf_type
)
1476 struct vpfe_video_device
*video
= video_drvdata(file
);
1477 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1478 struct vpfe_pipeline
*pipe
= &video
->pipe
;
1479 struct vpfe_fh
*fh
= file
->private_data
;
1480 struct vpfe_ext_subdev_info
*sdinfo
;
1483 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_streamon\n");
1485 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1486 buf_type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1487 v4l2_err(&vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1490 /* If file handle is not allowed IO, return error */
1491 if (!fh
->io_allowed
) {
1492 v4l2_err(&vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1495 sdinfo
= video
->current_ext_subdev
;
1496 /* If buffer queue is empty, return error */
1497 if (list_empty(&video
->buffer_queue
.queued_list
)) {
1498 v4l2_err(&vpfe_dev
->v4l2_dev
, "buffer queue is empty\n");
1501 /* Validate the pipeline */
1502 if (buf_type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1503 ret
= vpfe_video_validate_pipeline(pipe
);
1507 /* Call vb2_streamon to start streaming */
1508 return vb2_streamon(&video
->buffer_queue
, buf_type
);
1512 * vpfe_streamoff() - stop streaming
1513 * @file: file pointer
1514 * @priv: void pointer
1515 * @buf_type: enum v4l2_buf_type
1517 * stop all the subdevs which are in media chain
1519 * Return 0 on success, error code otherwise
1521 static int vpfe_streamoff(struct file
*file
, void *priv
,
1522 enum v4l2_buf_type buf_type
)
1524 struct vpfe_video_device
*video
= video_drvdata(file
);
1525 struct vpfe_device
*vpfe_dev
= video
->vpfe_dev
;
1526 struct vpfe_fh
*fh
= file
->private_data
;
1529 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "vpfe_streamoff\n");
1531 if (buf_type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
&&
1532 buf_type
!= V4L2_BUF_TYPE_VIDEO_OUTPUT
) {
1533 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "Invalid buf type\n");
1537 /* If io is allowed for this file handle, return error */
1538 if (!fh
->io_allowed
) {
1539 v4l2_dbg(1, debug
, &vpfe_dev
->v4l2_dev
, "fh->io_allowed\n");
1543 /* If streaming is not started, return error */
1544 if (!video
->started
) {
1545 v4l2_err(&vpfe_dev
->v4l2_dev
, "device is not started\n");
1549 ret
= mutex_lock_interruptible(&video
->lock
);
1553 vpfe_stop_capture(video
);
1554 ret
= vb2_streamoff(&video
->buffer_queue
, buf_type
);
1555 mutex_unlock(&video
->lock
);
1560 /* vpfe capture ioctl operations */
1561 static const struct v4l2_ioctl_ops vpfe_ioctl_ops
= {
1562 .vidioc_querycap
= vpfe_querycap
,
1563 .vidioc_g_fmt_vid_cap
= vpfe_g_fmt
,
1564 .vidioc_s_fmt_vid_cap
= vpfe_s_fmt
,
1565 .vidioc_try_fmt_vid_cap
= vpfe_try_fmt
,
1566 .vidioc_enum_fmt_vid_cap
= vpfe_enum_fmt
,
1567 .vidioc_g_fmt_vid_out
= vpfe_g_fmt
,
1568 .vidioc_s_fmt_vid_out
= vpfe_s_fmt
,
1569 .vidioc_try_fmt_vid_out
= vpfe_try_fmt
,
1570 .vidioc_enum_fmt_vid_out
= vpfe_enum_fmt
,
1571 .vidioc_enum_input
= vpfe_enum_input
,
1572 .vidioc_g_input
= vpfe_g_input
,
1573 .vidioc_s_input
= vpfe_s_input
,
1574 .vidioc_querystd
= vpfe_querystd
,
1575 .vidioc_s_std
= vpfe_s_std
,
1576 .vidioc_g_std
= vpfe_g_std
,
1577 .vidioc_enum_dv_timings
= vpfe_enum_dv_timings
,
1578 .vidioc_query_dv_timings
= vpfe_query_dv_timings
,
1579 .vidioc_s_dv_timings
= vpfe_s_dv_timings
,
1580 .vidioc_g_dv_timings
= vpfe_g_dv_timings
,
1581 .vidioc_reqbufs
= vpfe_reqbufs
,
1582 .vidioc_querybuf
= vpfe_querybuf
,
1583 .vidioc_qbuf
= vpfe_qbuf
,
1584 .vidioc_dqbuf
= vpfe_dqbuf
,
1585 .vidioc_streamon
= vpfe_streamon
,
1586 .vidioc_streamoff
= vpfe_streamoff
,
1589 /* VPFE video init function */
1590 int vpfe_video_init(struct vpfe_video_device
*video
, const char *name
)
1592 const char *direction
;
1595 switch (video
->type
) {
1596 case V4L2_BUF_TYPE_VIDEO_CAPTURE
:
1597 direction
= "output";
1598 video
->pad
.flags
= MEDIA_PAD_FL_SINK
;
1599 video
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1602 case V4L2_BUF_TYPE_VIDEO_OUTPUT
:
1603 direction
= "input";
1604 video
->pad
.flags
= MEDIA_PAD_FL_SOURCE
;
1605 video
->type
= V4L2_BUF_TYPE_VIDEO_OUTPUT
;
1611 /* Initialize field of video device */
1612 video
->video_dev
.release
= video_device_release
;
1613 video
->video_dev
.fops
= &vpfe_fops
;
1614 video
->video_dev
.ioctl_ops
= &vpfe_ioctl_ops
;
1615 video
->video_dev
.minor
= -1;
1616 video
->video_dev
.tvnorms
= 0;
1617 snprintf(video
->video_dev
.name
, sizeof(video
->video_dev
.name
),
1618 "DAVINCI VIDEO %s %s", name
, direction
);
1620 spin_lock_init(&video
->irqlock
);
1621 spin_lock_init(&video
->dma_queue_lock
);
1622 mutex_init(&video
->lock
);
1623 ret
= media_entity_pads_init(&video
->video_dev
.entity
,
1628 video_set_drvdata(&video
->video_dev
, video
);
1633 /* vpfe video device register function */
1634 int vpfe_video_register(struct vpfe_video_device
*video
,
1635 struct v4l2_device
*vdev
)
1639 video
->video_dev
.v4l2_dev
= vdev
;
1641 ret
= video_register_device(&video
->video_dev
, VFL_TYPE_GRABBER
, -1);
1643 pr_err("%s: could not register video device (%d)\n",
1648 /* vpfe video device unregister function */
1649 void vpfe_video_unregister(struct vpfe_video_device
*video
)
1651 if (video_is_registered(&video
->video_dev
)) {
1652 video_unregister_device(&video
->video_dev
);
1653 media_entity_cleanup(&video
->video_dev
.entity
);