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|
/*
* Copyright (C) 2012 Texas Instruments Inc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contributors:
* Manjunath Hadli <manjunath.hadli@ti.com>
* Prabhakar Lad <prabhakar.lad@ti.com>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <media/v4l2-ioctl.h>
#include "vpfe.h"
#include "vpfe_mc_capture.h"
/* minimum number of buffers needed in cont-mode */
#define MIN_NUM_BUFFERS 3
static int debug;
/* get v4l2 subdev pointer to external subdev which is active */
static struct media_entity *vpfe_get_input_entity
(struct vpfe_video_device *video)
{
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct media_pad *remote;
remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]);
if (remote == NULL) {
pr_err("Invalid media connection to isif/ccdc\n");
return NULL;
}
return remote->entity;
}
/* updates external subdev(sensor/decoder) which is active */
static int vpfe_update_current_ext_subdev(struct vpfe_video_device *video)
{
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_config *vpfe_cfg;
struct v4l2_subdev *subdev;
struct media_pad *remote;
int i;
remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]);
if (remote == NULL) {
pr_err("Invalid media connection to isif/ccdc\n");
return -EINVAL;
}
subdev = media_entity_to_v4l2_subdev(remote->entity);
vpfe_cfg = vpfe_dev->pdev->platform_data;
for (i = 0; i < vpfe_cfg->num_subdevs; i++) {
if (!strcmp(vpfe_cfg->sub_devs[i].module_name, subdev->name)) {
video->current_ext_subdev = &vpfe_cfg->sub_devs[i];
break;
}
}
/* if user not linked decoder/sensor to isif/ccdc */
if (i == vpfe_cfg->num_subdevs) {
pr_err("Invalid media chain connection to isif/ccdc\n");
return -EINVAL;
}
/* find the v4l2 subdev pointer */
for (i = 0; i < vpfe_dev->num_ext_subdevs; i++) {
if (!strcmp(video->current_ext_subdev->module_name,
vpfe_dev->sd[i]->name))
video->current_ext_subdev->subdev = vpfe_dev->sd[i];
}
return 0;
}
/* get the subdev which is connected to the output video node */
static struct v4l2_subdev *
vpfe_video_remote_subdev(struct vpfe_video_device *video, u32 *pad)
{
struct media_pad *remote = media_entity_remote_pad(&video->pad);
if (remote == NULL || remote->entity->type != MEDIA_ENT_T_V4L2_SUBDEV)
return NULL;
if (pad)
*pad = remote->index;
return media_entity_to_v4l2_subdev(remote->entity);
}
/* get the format set at output pad of the adjacent subdev */
static int
__vpfe_video_get_format(struct vpfe_video_device *video,
struct v4l2_format *format)
{
struct v4l2_subdev_format fmt;
struct v4l2_subdev *subdev;
struct media_pad *remote;
u32 pad;
int ret;
subdev = vpfe_video_remote_subdev(video, &pad);
if (subdev == NULL)
return -EINVAL;
fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
remote = media_entity_remote_pad(&video->pad);
fmt.pad = remote->index;
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
if (ret == -ENOIOCTLCMD)
return -EINVAL;
format->type = video->type;
/* convert mbus_format to v4l2_format */
v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
mbus_to_pix(&fmt.format, &format->fmt.pix);
return 0;
}
/* make a note of pipeline details */
static void vpfe_prepare_pipeline(struct vpfe_video_device *video)
{
struct media_entity *entity = &video->video_dev.entity;
struct media_device *mdev = entity->parent;
struct vpfe_pipeline *pipe = &video->pipe;
struct vpfe_video_device *far_end = NULL;
struct media_entity_graph graph;
pipe->input_num = 0;
pipe->output_num = 0;
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = video;
else
pipe->outputs[pipe->output_num++] = video;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (entity == &video->video_dev.entity)
continue;
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
continue;
far_end = to_vpfe_video(media_entity_to_video_device(entity));
if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = far_end;
else
pipe->outputs[pipe->output_num++] = far_end;
}
mutex_unlock(&mdev->graph_mutex);
}
/* update pipe state selected by user */
static int vpfe_update_pipe_state(struct vpfe_video_device *video)
{
struct vpfe_pipeline *pipe = &video->pipe;
int ret;
vpfe_prepare_pipeline(video);
/* Find out if there is any input video
if yes, it is single shot.
*/
if (pipe->input_num == 0) {
pipe->state = VPFE_PIPELINE_STREAM_CONTINUOUS;
ret = vpfe_update_current_ext_subdev(video);
if (ret) {
pr_err("Invalid external subdev\n");
return ret;
}
} else {
pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT;
}
video->initialized = 1;
video->skip_frame_count = 1;
video->skip_frame_count_init = 1;
return 0;
}
/* checks wether pipeline is ready for enabling */
int vpfe_video_is_pipe_ready(struct vpfe_pipeline *pipe)
{
int i;
for (i = 0; i < pipe->input_num; i++)
if (!pipe->inputs[i]->started ||
pipe->inputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED)
return 0;
for (i = 0; i < pipe->output_num; i++)
if (!pipe->outputs[i]->started ||
pipe->outputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED)
return 0;
return 1;
}
/**
* Validate a pipeline by checking both ends of all links for format
* discrepancies.
*
* Return 0 if all formats match, or -EPIPE if at least one link is found with
* different formats on its two ends.
*/
static int vpfe_video_validate_pipeline(struct vpfe_pipeline *pipe)
{
struct v4l2_subdev_format fmt_source;
struct v4l2_subdev_format fmt_sink;
struct v4l2_subdev *subdev;
struct media_pad *pad;
int ret;
/*
* Should not matter if it is output[0] or 1 as
* the general ideas is to traverse backwards and
* the fact that the out video node always has the
* format of the connected pad.
*/
subdev = vpfe_video_remote_subdev(pipe->outputs[0], NULL);
if (subdev == NULL)
return -EPIPE;
while (1) {
/* Retrieve the sink format */
pad = &subdev->entity.pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE;
fmt_sink.pad = pad->index;
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL,
&fmt_sink);
if (ret < 0 && ret != -ENOIOCTLCMD)
return -EPIPE;
/* Retrieve the source format */
pad = media_entity_remote_pad(pad);
if (pad == NULL ||
pad->entity->type != MEDIA_ENT_T_V4L2_SUBDEV)
break;
subdev = media_entity_to_v4l2_subdev(pad->entity);
fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE;
fmt_source.pad = pad->index;
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source);
if (ret < 0 && ret != -ENOIOCTLCMD)
return -EPIPE;
/* Check if the two ends match */
if (fmt_source.format.code != fmt_sink.format.code ||
fmt_source.format.width != fmt_sink.format.width ||
fmt_source.format.height != fmt_sink.format.height)
return -EPIPE;
}
return 0;
}
/*
* vpfe_pipeline_enable() - Enable streaming on a pipeline
* @vpfe_dev: vpfe device
* @pipe: vpfe pipeline
*
* Walk the entities chain starting at the pipeline output video node and start
* all modules in the chain in the given mode.
*
* Return 0 if successful, or the return value of the failed video::s_stream
* operation otherwise.
*/
static int vpfe_pipeline_enable(struct vpfe_pipeline *pipe)
{
struct media_entity_graph graph;
struct media_entity *entity;
struct v4l2_subdev *subdev;
struct media_device *mdev;
int ret = 0;
if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
entity = vpfe_get_input_entity(pipe->outputs[0]);
else
entity = &pipe->inputs[0]->video_dev.entity;
mdev = entity->parent;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
continue;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, 1);
if (ret < 0 && ret != -ENOIOCTLCMD)
break;
}
mutex_unlock(&mdev->graph_mutex);
return ret;
}
/*
* vpfe_pipeline_disable() - Disable streaming on a pipeline
* @vpfe_dev: vpfe device
* @pipe: VPFE pipeline
*
* Walk the entities chain starting at the pipeline output video node and stop
* all modules in the chain.
*
* Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
* can't be stopped.
*/
static int vpfe_pipeline_disable(struct vpfe_pipeline *pipe)
{
struct media_entity_graph graph;
struct media_entity *entity;
struct v4l2_subdev *subdev;
struct media_device *mdev;
int ret = 0;
if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
entity = vpfe_get_input_entity(pipe->outputs[0]);
else
entity = &pipe->inputs[0]->video_dev.entity;
mdev = entity->parent;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
continue;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, 0);
if (ret < 0 && ret != -ENOIOCTLCMD)
break;
}
mutex_unlock(&mdev->graph_mutex);
return ret ? -ETIMEDOUT : 0;
}
/*
* vpfe_pipeline_set_stream() - Enable/disable streaming on a pipeline
* @vpfe_dev: VPFE device
* @pipe: VPFE pipeline
* @state: Stream state (stopped or active)
*
* Set the pipeline to the given stream state.
*
* Return 0 if successful, or the return value of the failed video::s_stream
* operation otherwise.
*/
static int vpfe_pipeline_set_stream(struct vpfe_pipeline *pipe,
enum vpfe_pipeline_stream_state state)
{
if (state == VPFE_PIPELINE_STREAM_STOPPED)
return vpfe_pipeline_disable(pipe);
return vpfe_pipeline_enable(pipe);
}
static int all_videos_stopped(struct vpfe_video_device *video)
{
struct vpfe_pipeline *pipe = &video->pipe;
int i;
for (i = 0; i < pipe->input_num; i++)
if (pipe->inputs[i]->started)
return 0;
for (i = 0; i < pipe->output_num; i++)
if (pipe->outputs[i]->started)
return 0;
return 1;
}
/*
* vpfe_open() - open video device
* @file: file pointer
*
* initialize media pipeline state, allocate memory for file handle
*
* Return 0 if successful, or the return -ENODEV otherwise.
*/
static int vpfe_open(struct file *file)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_fh *handle;
/* Allocate memory for the file handle object */
handle = kzalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
if (handle == NULL)
return -ENOMEM;
v4l2_fh_init(&handle->vfh, &video->video_dev);
v4l2_fh_add(&handle->vfh);
mutex_lock(&video->lock);
/* If decoder is not initialized. initialize it */
if (!video->initialized && vpfe_update_pipe_state(video)) {
mutex_unlock(&video->lock);
return -ENODEV;
}
/* Increment device users counter */
video->usrs++;
/* Set io_allowed member to false */
handle->io_allowed = 0;
v4l2_prio_open(&video->prio, &handle->prio);
handle->video = video;
file->private_data = &handle->vfh;
mutex_unlock(&video->lock);
return 0;
}
/* get the next buffer available from dma queue */
static unsigned long
vpfe_video_get_next_buffer(struct vpfe_video_device *video)
{
video->cur_frm = video->next_frm =
list_entry(video->dma_queue.next,
struct vpfe_cap_buffer, list);
list_del(&video->next_frm->list);
video->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
return vb2_dma_contig_plane_dma_addr(&video->next_frm->vb, 0);
}
/* schedule the next buffer which is available on dma queue */
void vpfe_video_schedule_next_buffer(struct vpfe_video_device *video)
{
struct vpfe_device *vpfe_dev = video->vpfe_dev;
unsigned long addr;
if (list_empty(&video->dma_queue))
return;
video->next_frm = list_entry(video->dma_queue.next,
struct vpfe_cap_buffer, list);
if (VPFE_PIPELINE_STREAM_SINGLESHOT == video->pipe.state)
video->cur_frm = video->next_frm;
list_del(&video->next_frm->list);
video->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
addr = vb2_dma_contig_plane_dma_addr(&video->next_frm->vb, 0);
video->ops->queue(vpfe_dev, addr);
video->state = VPFE_VIDEO_BUFFER_QUEUED;
}
/* schedule the buffer for capturing bottom field */
void vpfe_video_schedule_bottom_field(struct vpfe_video_device *video)
{
struct vpfe_device *vpfe_dev = video->vpfe_dev;
unsigned long addr;
addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb, 0);
addr += video->field_off;
video->ops->queue(vpfe_dev, addr);
}
/* make buffer available for dequeue */
void vpfe_video_process_buffer_complete(struct vpfe_video_device *video)
{
struct vpfe_pipeline *pipe = &video->pipe;
do_gettimeofday(&video->cur_frm->vb.v4l2_buf.timestamp);
vb2_buffer_done(&video->cur_frm->vb, VB2_BUF_STATE_DONE);
if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
video->cur_frm = video->next_frm;
}
/* vpfe_stop_capture() - stop streaming */
static void vpfe_stop_capture(struct vpfe_video_device *video)
{
struct vpfe_pipeline *pipe = &video->pipe;
video->started = 0;
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
return;
if (all_videos_stopped(video))
vpfe_pipeline_set_stream(pipe,
VPFE_PIPELINE_STREAM_STOPPED);
}
/*
* vpfe_release() - release video device
* @file: file pointer
*
* deletes buffer queue, frees the buffers and the vpfe file handle
*
* Return 0
*/
static int vpfe_release(struct file *file)
{
struct vpfe_video_device *video = video_drvdata(file);
struct v4l2_fh *vfh = file->private_data;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_fh *fh = container_of(vfh, struct vpfe_fh, vfh);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
/* Get the device lock */
mutex_lock(&video->lock);
/* if this instance is doing IO */
if (fh->io_allowed) {
if (video->started) {
vpfe_stop_capture(video);
/* mark pipe state as stopped in vpfe_release(),
as app might call streamon() after streamoff()
in which case driver has to start streaming.
*/
video->pipe.state = VPFE_PIPELINE_STREAM_STOPPED;
vb2_streamoff(&video->buffer_queue,
video->buffer_queue.type);
}
video->io_usrs = 0;
/* Free buffers allocated */
vb2_queue_release(&video->buffer_queue);
vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
}
/* Decrement device users counter */
video->usrs--;
/* Close the priority */
v4l2_prio_close(&video->prio, fh->prio);
/* If this is the last file handle */
if (!video->usrs)
video->initialized = 0;
mutex_unlock(&video->lock);
file->private_data = NULL;
/* Free memory allocated to file handle object */
v4l2_fh_del(vfh);
kzfree(fh);
return 0;
}
/*
* vpfe_mmap() - It is used to map kernel space buffers
* into user spaces
*/
static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
return vb2_mmap(&video->buffer_queue, vma);
}
/*
* vpfe_poll() - It is used for select/poll system call
*/
static unsigned int vpfe_poll(struct file *file, poll_table *wait)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
if (video->started)
return vb2_poll(&video->buffer_queue, file, wait);
return 0;
}
/* vpfe capture driver file operations */
static const struct v4l2_file_operations vpfe_fops = {
.owner = THIS_MODULE,
.open = vpfe_open,
.release = vpfe_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vpfe_mmap,
.poll = vpfe_poll
};
/*
* vpfe_querycap() - query capabilities of video device
* @file: file pointer
* @priv: void pointer
* @cap: pointer to v4l2_capability structure
*
* fills v4l2 capabilities structure
*
* Return 0
*/
static int vpfe_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
else
cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
cap->device_caps = cap->capabilities;
cap->version = VPFE_CAPTURE_VERSION_CODE;
strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
return 0;
}
/*
* vpfe_g_fmt() - get the format which is active on video device
* @file: file pointer
* @priv: void pointer
* @fmt: pointer to v4l2_format structure
*
* fills v4l2 format structure with active format
*
* Return 0
*/
static int vpfe_g_fmt(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt\n");
/* Fill in the information about format */
*fmt = video->fmt;
return 0;
}
/*
* vpfe_enum_fmt() - enum formats supported on media chain
* @file: file pointer
* @priv: void pointer
* @fmt: pointer to v4l2_fmtdesc structure
*
* fills v4l2_fmtdesc structure with output format set on adjacent subdev,
* only one format is enumearted as subdevs are already configured
*
* Return 0 if successful, error code otherwise
*/
static int vpfe_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_subdev_format sd_fmt;
struct v4l2_mbus_framefmt mbus;
struct v4l2_subdev *subdev;
struct v4l2_format format;
struct media_pad *remote;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt\n");
/* since already subdev pad format is set,
only one pixel format is available */
if (fmt->index > 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid index\n");
return -EINVAL;
}
/* get the remote pad */
remote = media_entity_remote_pad(&video->pad);
if (remote == NULL) {
v4l2_err(&vpfe_dev->v4l2_dev,
"invalid remote pad for video node\n");
return -EINVAL;
}
/* get the remote subdev */
subdev = vpfe_video_remote_subdev(video, NULL);
if (subdev == NULL) {
v4l2_err(&vpfe_dev->v4l2_dev,
"invalid remote subdev for video node\n");
return -EINVAL;
}
sd_fmt.pad = remote->index;
sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
/* get output format of remote subdev */
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt);
if (ret) {
v4l2_err(&vpfe_dev->v4l2_dev,
"invalid remote subdev for video node\n");
return ret;
}
/* convert to pix format */
mbus.code = sd_fmt.format.code;
mbus_to_pix(&mbus, &format.fmt.pix);
/* copy the result */
fmt->pixelformat = format.fmt.pix.pixelformat;
return 0;
}
/*
* vpfe_s_fmt() - set the format on video device
* @file: file pointer
* @priv: void pointer
* @fmt: pointer to v4l2_format structure
*
* validate and set the format on video device
*
* Return 0 on success, error code otherwise
*/
static int vpfe_s_fmt(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_format format;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt\n");
/* If streaming is started, return error */
if (video->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
return -EBUSY;
}
/* get adjacent subdev's output pad format */
ret = __vpfe_video_get_format(video, &format);
if (ret)
return ret;
*fmt = format;
video->fmt = *fmt;
return 0;
}
/*
* vpfe_try_fmt() - try the format on video device
* @file: file pointer
* @priv: void pointer
* @fmt: pointer to v4l2_format structure
*
* validate the format, update with correct format
* based on output format set on adjacent subdev
*
* Return 0 on success, error code otherwise
*/
static int vpfe_try_fmt(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_format format;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt\n");
/* get adjacent subdev's output pad format */
ret = __vpfe_video_get_format(video, &format);
if (ret)
return ret;
*fmt = format;
return 0;
}
/*
* vpfe_enum_input() - enum inputs supported on media chain
* @file: file pointer
* @priv: void pointer
* @fmt: pointer to v4l2_fmtdesc structure
*
* fills v4l2_input structure with input available on media chain,
* only one input is enumearted as media chain is setup by this time
*
* Return 0 if successful, -EINVAL is media chain is invalid
*/
static int vpfe_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_ext_subdev_info *sdinfo = video->current_ext_subdev;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
/* enumerate from the subdev user has chosen through mc */
if (inp->index < sdinfo->num_inputs) {
memcpy(inp, &sdinfo->inputs[inp->index],
sizeof(struct v4l2_input));
return 0;
}
return -EINVAL;
}
/*
* vpfe_g_input() - get index of the input which is active
* @file: file pointer
* @priv: void pointer
* @index: pointer to unsigned int
*
* set index with input index which is active
*/
static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
*index = video->current_input;
return 0;
}
/*
* vpfe_s_input() - set input which is pointed by input index
* @file: file pointer
* @priv: void pointer
* @index: pointer to unsigned int
*
* set input on external subdev
*
* Return 0 on success, error code otherwise
*/
static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_ext_subdev_info *sdinfo;
struct vpfe_route *route;
struct v4l2_input *inps;
u32 output;
u32 input;
int ret;
int i;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
ret = mutex_lock_interruptible(&video->lock);
if (ret)
return ret;
/*
* If streaming is started return device busy
* error
*/
if (video->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
ret = -EBUSY;
goto unlock_out;
}
sdinfo = video->current_ext_subdev;
if (!sdinfo->registered) {
ret = -EINVAL;
goto unlock_out;
}
if (vpfe_dev->cfg->setup_input &&
vpfe_dev->cfg->setup_input(sdinfo->grp_id) < 0) {
ret = -EFAULT;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"couldn't setup input for %s\n",
sdinfo->module_name);
goto unlock_out;
}
route = &sdinfo->routes[index];
if (route && sdinfo->can_route) {
input = route->input;
output = route->output;
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
sdinfo->grp_id, video,
s_routing, input, output, 0);
if (ret) {
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"s_input:error in setting input in decoder\n");
ret = -EINVAL;
goto unlock_out;
}
}
/* set standards set by subdev in video device */
for (i = 0; i < sdinfo->num_inputs; i++) {
inps = &sdinfo->inputs[i];
video->video_dev.tvnorms |= inps->std;
}
video->current_input = index;
unlock_out:
mutex_unlock(&video->lock);
return ret;
}
/*
* vpfe_querystd() - query std which is being input on external subdev
* @file: file pointer
* @priv: void pointer
* @std_id: pointer to v4l2_std_id structure
*
* call external subdev through v4l2_device_call_until_err to
* get the std that is being active.
*
* Return 0 on success, error code otherwise
*/
static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_ext_subdev_info *sdinfo;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
ret = mutex_lock_interruptible(&video->lock);
sdinfo = video->current_ext_subdev;
if (ret)
return ret;
/* Call querystd function of decoder device */
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
video, querystd, std_id);
mutex_unlock(&video->lock);
return ret;
}
/*
* vpfe_s_std() - set std on external subdev
* @file: file pointer
* @priv: void pointer
* @std_id: pointer to v4l2_std_id structure
*
* set std pointed by std_id on external subdev by calling it using
* v4l2_device_call_until_err
*
* Return 0 on success, error code otherwise
*/
static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_ext_subdev_info *sdinfo;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
/* Call decoder driver function to set the standard */
ret = mutex_lock_interruptible(&video->lock);
if (ret)
return ret;
sdinfo = video->current_ext_subdev;
/* If streaming is started, return device busy error */
if (video->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
ret = -EBUSY;
goto unlock_out;
}
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
core, s_std, std_id);
if (ret < 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
video->stdid = V4L2_STD_UNKNOWN;
goto unlock_out;
}
video->stdid = std_id;
unlock_out:
mutex_unlock(&video->lock);
return ret;
}
static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *tvnorm)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
*tvnorm = video->stdid;
return 0;
}
/*
* vpfe_enum_dv_timings() - enumerate dv_timings which are supported by
* to external subdev
* @file: file pointer
* @priv: void pointer
* @timings: pointer to v4l2_enum_dv_timings structure
*
* enum dv_timings's which are supported by external subdev through
* v4l2_subdev_call
*
* Return 0 on success, error code otherwise
*/
static int
vpfe_enum_dv_timings(struct file *file, void *fh,
struct v4l2_enum_dv_timings *timings)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_dv_timings\n");
return v4l2_subdev_call(subdev, video, enum_dv_timings, timings);
}
/*
* vpfe_query_dv_timings() - query the dv_timings which is being input
* to external subdev
* @file: file pointer
* @priv: void pointer
* @timings: pointer to v4l2_dv_timings structure
*
* get dv_timings which is being input on external subdev through
* v4l2_subdev_call
*
* Return 0 on success, error code otherwise
*/
static int
vpfe_query_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_query_dv_timings\n");
return v4l2_subdev_call(subdev, video, query_dv_timings, timings);
}
/*
* vpfe_s_dv_timings() - set dv_timings on external subdev
* @file: file pointer
* @priv: void pointer
* @timings: pointer to v4l2_dv_timings structure
*
* set dv_timings pointed by timings on external subdev through
* v4l2_device_call_until_err, this configures amplifier also
*
* Return 0 on success, error code otherwise
*/
static int
vpfe_s_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_dv_timings\n");
video->stdid = V4L2_STD_UNKNOWN;
return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
video->current_ext_subdev->grp_id,
video, s_dv_timings, timings);
}
/*
* vpfe_g_dv_timings() - get dv_timings which is set on external subdev
* @file: file pointer
* @priv: void pointer
* @timings: pointer to v4l2_dv_timings structure
*
* get dv_timings which is set on external subdev through
* v4l2_subdev_call
*
* Return 0 on success, error code otherwise
*/
static int
vpfe_g_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_dv_timings\n");
return v4l2_subdev_call(subdev, video, g_dv_timings, timings);
}
/*
* Videobuf operations
*/
/*
* vpfe_buffer_queue_setup : Callback function for buffer setup.
* @vq: vb2_queue ptr
* @fmt: v4l2 format
* @nbuffers: ptr to number of buffers requested by application
* @nplanes:: contains number of distinct video planes needed to hold a frame
* @sizes[]: contains the size (in bytes) of each plane.
* @alloc_ctxs: ptr to allocation context
*
* This callback function is called when reqbuf() is called to adjust
* the buffer nbuffers and buffer size
*/
static int
vpfe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct vpfe_fh *fh = vb2_get_drv_priv(vq);
struct vpfe_video_device *video = fh->video;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_pipeline *pipe = &video->pipe;
unsigned long size;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue_setup\n");
size = video->fmt.fmt.pix.sizeimage;
if (vpfe_dev->video_limit) {
while (size * *nbuffers > vpfe_dev->video_limit)
(*nbuffers)--;
}
if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) {
if (*nbuffers < MIN_NUM_BUFFERS)
*nbuffers = MIN_NUM_BUFFERS;
}
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = video->alloc_ctx;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"nbuffers=%d, size=%lu\n", *nbuffers, size);
return 0;
}
/*
* vpfe_buffer_prepare : callback function for buffer prepare
* @vb: ptr to vb2_buffer
*
* This is the callback function for buffer prepare when vb2_qbuf()
* function is called. The buffer is prepared and user space virtual address
* or user address is converted into physical address
*/
static int vpfe_buffer_prepare(struct vb2_buffer *vb)
{
struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vpfe_video_device *video = fh->video;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
unsigned long addr;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
if (vb->state != VB2_BUF_STATE_ACTIVE &&
vb->state != VB2_BUF_STATE_PREPARED)
return 0;
/* Initialize buffer */
vb2_set_plane_payload(vb, 0, video->fmt.fmt.pix.sizeimage);
if (vb2_plane_vaddr(vb, 0) &&
vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
return -EINVAL;
addr = vb2_dma_contig_plane_dma_addr(vb, 0);
/* Make sure user addresses are aligned to 32 bytes */
if (!ALIGN(addr, 32))
return -EINVAL;
return 0;
}
static void vpfe_buffer_queue(struct vb2_buffer *vb)
{
/* Get the file handle object and device object */
struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vpfe_video_device *video = fh->video;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_pipeline *pipe = &video->pipe;
struct vpfe_cap_buffer *buf = container_of(vb,
struct vpfe_cap_buffer, vb);
unsigned long flags;
unsigned long empty;
unsigned long addr;
spin_lock_irqsave(&video->dma_queue_lock, flags);
empty = list_empty(&video->dma_queue);
/* add the buffer to the DMA queue */
list_add_tail(&buf->list, &video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
/* this case happens in case of single shot */
if (empty && video->started && pipe->state ==
VPFE_PIPELINE_STREAM_SINGLESHOT &&
video->state == VPFE_VIDEO_BUFFER_NOT_QUEUED) {
spin_lock(&video->dma_queue_lock);
addr = vpfe_video_get_next_buffer(video);
video->ops->queue(vpfe_dev, addr);
video->state = VPFE_VIDEO_BUFFER_QUEUED;
spin_unlock(&video->dma_queue_lock);
/* enable h/w each time in single shot */
if (vpfe_video_is_pipe_ready(pipe))
vpfe_pipeline_set_stream(pipe,
VPFE_PIPELINE_STREAM_SINGLESHOT);
}
}
/* vpfe_start_capture() - start streaming on all the subdevs */
static int vpfe_start_capture(struct vpfe_video_device *video)
{
struct vpfe_pipeline *pipe = &video->pipe;
int ret = 0;
video->started = 1;
if (vpfe_video_is_pipe_ready(pipe))
ret = vpfe_pipeline_set_stream(pipe, pipe->state);
return ret;
}
static int vpfe_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct vpfe_fh *fh = vb2_get_drv_priv(vq);
struct vpfe_video_device *video = fh->video;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
unsigned long addr;
int ret;
ret = mutex_lock_interruptible(&video->lock);
if (ret)
goto streamoff;
/* Get the next frame from the buffer queue */
video->cur_frm = video->next_frm =
list_entry(video->dma_queue.next, struct vpfe_cap_buffer, list);
/* Remove buffer from the buffer queue */
list_del(&video->cur_frm->list);
/* Mark state of the current frame to active */
video->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
/* Initialize field_id and started member */
video->field_id = 0;
addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb, 0);
video->ops->queue(vpfe_dev, addr);
video->state = VPFE_VIDEO_BUFFER_QUEUED;
ret = vpfe_start_capture(video);
if (ret)
goto unlock_out;
mutex_unlock(&video->lock);
return ret;
unlock_out:
mutex_unlock(&video->lock);
streamoff:
ret = vb2_streamoff(&video->buffer_queue, video->buffer_queue.type);
return 0;
}
static int vpfe_buffer_init(struct vb2_buffer *vb)
{
struct vpfe_cap_buffer *buf = container_of(vb,
struct vpfe_cap_buffer, vb);
INIT_LIST_HEAD(&buf->list);
return 0;
}
/* abort streaming and wait for last buffer */
static int vpfe_stop_streaming(struct vb2_queue *vq)
{
struct vpfe_fh *fh = vb2_get_drv_priv(vq);
struct vpfe_video_device *video = fh->video;
if (!vb2_is_streaming(vq))
return 0;
/* release all active buffers */
while (!list_empty(&video->dma_queue)) {
video->next_frm = list_entry(video->dma_queue.next,
struct vpfe_cap_buffer, list);
list_del(&video->next_frm->list);
vb2_buffer_done(&video->next_frm->vb, VB2_BUF_STATE_ERROR);
}
return 0;
}
static void vpfe_buf_cleanup(struct vb2_buffer *vb)
{
struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vpfe_video_device *video = fh->video;
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_cap_buffer *buf = container_of(vb,
struct vpfe_cap_buffer, vb);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buf_cleanup\n");
if (vb->state == VB2_BUF_STATE_ACTIVE)
list_del_init(&buf->list);
}
static struct vb2_ops video_qops = {
.queue_setup = vpfe_buffer_queue_setup,
.buf_init = vpfe_buffer_init,
.buf_prepare = vpfe_buffer_prepare,
.start_streaming = vpfe_start_streaming,
.stop_streaming = vpfe_stop_streaming,
.buf_cleanup = vpfe_buf_cleanup,
.buf_queue = vpfe_buffer_queue,
};
/*
* vpfe_reqbufs() - supported REQBUF only once opening
* the device.
*/
static int vpfe_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *req_buf)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_fh *fh = file->private_data;
struct vb2_queue *q;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type &&
V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
return -EINVAL;
}
ret = mutex_lock_interruptible(&video->lock);
if (ret)
return ret;
if (video->io_usrs != 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
ret = -EBUSY;
goto unlock_out;
}
video->memory = req_buf->memory;
/* Initialize videobuf2 queue as per the buffer type */
video->alloc_ctx = vb2_dma_contig_init_ctx(vpfe_dev->pdev);
if (IS_ERR(video->alloc_ctx)) {
v4l2_err(&vpfe_dev->v4l2_dev, "Failed to get the context\n");
return PTR_ERR(video->alloc_ctx);
}
q = &video->buffer_queue;
q->type = req_buf->type;
q->io_modes = VB2_MMAP | VB2_USERPTR;
q->drv_priv = fh;
q->ops = &video_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
ret = vb2_queue_init(q);
if (ret) {
v4l2_err(&vpfe_dev->v4l2_dev, "vb2_queue_init() failed\n");
vb2_dma_contig_cleanup_ctx(vpfe_dev->pdev);
return ret;
}
fh->io_allowed = 1;
video->io_usrs = 1;
INIT_LIST_HEAD(&video->dma_queue);
ret = vb2_reqbufs(&video->buffer_queue, req_buf);
unlock_out:
mutex_unlock(&video->lock);
return ret;
}
/*
* vpfe_querybuf() - query buffers for exchange
*/
static int vpfe_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type &&
V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
if (video->memory != V4L2_MEMORY_MMAP) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
return -EINVAL;
}
/* Call vb2_querybuf to get information */
return vb2_querybuf(&video->buffer_queue, buf);
}
/*
* vpfe_qbuf() - queue buffers for capture or processing
*/
static int vpfe_qbuf(struct file *file, void *priv,
struct v4l2_buffer *p)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_fh *fh = file->private_data;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type &&
V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
/*
* If this file handle is not allowed to do IO,
* return error
*/
if (!fh->io_allowed) {
v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
return vb2_qbuf(&video->buffer_queue, p);
}
/*
* vpfe_dqbuf() - deque buffer which is done with processing
*/
static int vpfe_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type &&
V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
return vb2_dqbuf(&video->buffer_queue,
buf, (file->f_flags & O_NONBLOCK));
}
/*
* vpfe_streamon() - start streaming
* @file: file pointer
* @priv: void pointer
* @buf_type: enum v4l2_buf_type
*
* queue buffer onto hardware for capture/processing and
* start all the subdevs which are in media chain
*
* Return 0 on success, error code otherwise
*/
static int vpfe_streamon(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_pipeline *pipe = &video->pipe;
struct vpfe_fh *fh = file->private_data;
struct vpfe_ext_subdev_info *sdinfo;
int ret = -EINVAL;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type &&
V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return ret;
}
/* If file handle is not allowed IO, return error */
if (!fh->io_allowed) {
v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
sdinfo = video->current_ext_subdev;
/* If buffer queue is empty, return error */
if (list_empty(&video->buffer_queue.queued_list)) {
v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
return -EIO;
}
/* Validate the pipeline */
if (V4L2_BUF_TYPE_VIDEO_CAPTURE == buf_type) {
ret = vpfe_video_validate_pipeline(pipe);
if (ret < 0)
return ret;
}
/* Call vb2_streamon to start streaming */
return vb2_streamon(&video->buffer_queue, buf_type);
}
/*
* vpfe_streamoff() - stop streaming
* @file: file pointer
* @priv: void pointer
* @buf_type: enum v4l2_buf_type
*
* stop all the subdevs which are in media chain
*
* Return 0 on success, error code otherwise
*/
static int vpfe_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct vpfe_video_device *video = video_drvdata(file);
struct vpfe_device *vpfe_dev = video->vpfe_dev;
struct vpfe_fh *fh = file->private_data;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
buf_type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
/* If io is allowed for this file handle, return error */
if (!fh->io_allowed) {
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
/* If streaming is not started, return error */
if (!video->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "device is not started\n");
return -EINVAL;
}
ret = mutex_lock_interruptible(&video->lock);
if (ret)
return ret;
vpfe_stop_capture(video);
ret = vb2_streamoff(&video->buffer_queue, buf_type);
mutex_unlock(&video->lock);
return ret;
}
/* vpfe capture ioctl operations */
static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
.vidioc_querycap = vpfe_querycap,
.vidioc_g_fmt_vid_cap = vpfe_g_fmt,
.vidioc_s_fmt_vid_cap = vpfe_s_fmt,
.vidioc_try_fmt_vid_cap = vpfe_try_fmt,
.vidioc_enum_fmt_vid_cap = vpfe_enum_fmt,
.vidioc_g_fmt_vid_out = vpfe_g_fmt,
.vidioc_s_fmt_vid_out = vpfe_s_fmt,
.vidioc_try_fmt_vid_out = vpfe_try_fmt,
.vidioc_enum_fmt_vid_out = vpfe_enum_fmt,
.vidioc_enum_input = vpfe_enum_input,
.vidioc_g_input = vpfe_g_input,
.vidioc_s_input = vpfe_s_input,
.vidioc_querystd = vpfe_querystd,
.vidioc_s_std = vpfe_s_std,
.vidioc_g_std = vpfe_g_std,
.vidioc_enum_dv_timings = vpfe_enum_dv_timings,
.vidioc_query_dv_timings = vpfe_query_dv_timings,
.vidioc_s_dv_timings = vpfe_s_dv_timings,
.vidioc_g_dv_timings = vpfe_g_dv_timings,
.vidioc_reqbufs = vpfe_reqbufs,
.vidioc_querybuf = vpfe_querybuf,
.vidioc_qbuf = vpfe_qbuf,
.vidioc_dqbuf = vpfe_dqbuf,
.vidioc_streamon = vpfe_streamon,
.vidioc_streamoff = vpfe_streamoff,
};
/* VPFE video init function */
int vpfe_video_init(struct vpfe_video_device *video, const char *name)
{
const char *direction;
int ret;
switch (video->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
direction = "output";
video->pad.flags = MEDIA_PAD_FL_SINK;
video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
direction = "input";
video->pad.flags = MEDIA_PAD_FL_SOURCE;
video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
break;
default:
return -EINVAL;
}
/* Initialize field of video device */
video->video_dev.release = video_device_release;
video->video_dev.fops = &vpfe_fops;
video->video_dev.ioctl_ops = &vpfe_ioctl_ops;
video->video_dev.minor = -1;
video->video_dev.tvnorms = 0;
snprintf(video->video_dev.name, sizeof(video->video_dev.name),
"DAVINCI VIDEO %s %s", name, direction);
/* Initialize prio member of device object */
v4l2_prio_init(&video->prio);
spin_lock_init(&video->irqlock);
spin_lock_init(&video->dma_queue_lock);
mutex_init(&video->lock);
ret = media_entity_init(&video->video_dev.entity,
1, &video->pad, 0);
if (ret < 0)
return ret;
video_set_drvdata(&video->video_dev, video);
return 0;
}
/* vpfe video device register function */
int vpfe_video_register(struct vpfe_video_device *video,
struct v4l2_device *vdev)
{
int ret;
video->video_dev.v4l2_dev = vdev;
ret = video_register_device(&video->video_dev, VFL_TYPE_GRABBER, -1);
if (ret < 0)
pr_err("%s: could not register video device (%d)\n",
__func__, ret);
return ret;
}
/* vpfe video device unregister function */
void vpfe_video_unregister(struct vpfe_video_device *video)
{
if (video_is_registered(&video->video_dev)) {
video_unregister_device(&video->video_dev);
media_entity_cleanup(&video->video_dev.entity);
}
}
|