/*
* isp_video_buffer_queue - Add buffer to streaming queue
* @buf: Video buffer
*
* In memory-to-memory mode, start streaming on the pipeline if buffers are
* queued on both the input and the output, if the pipeline isn't already busy.
* If the pipeline is busy, it will be restarted in the output module interrupt
* handler.
*/
static void isp_video_buffer_queue(struct isp_video_buffer *buf)
{
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
enum isp_pipeline_state state;
unsigned long flags;
unsigned int empty;
unsigned int start;
empty = list_empty(&video->dmaqueue);
list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue);
if (empty) {
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
state = ISP_PIPELINE_QUEUE_OUTPUT;
else
state = ISP_PIPELINE_QUEUE_INPUT;
spin_lock_irqsave(&pipe->lock, flags);
pipe->state |= state;
video->ops->queue(video, buffer);
video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
start = isp_pipeline_ready(pipe);
if (start)
pipe->state |= ISP_PIPELINE_STREAM;
spin_unlock_irqrestore(&pipe->lock, flags);
if (start)
omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_SINGLESHOT);
}
}
static int isp_video_start_streaming(struct vb2_queue *queue,
unsigned int count)
{
struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
struct isp_video *video = vfh->video;
struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
unsigned long flags;
int ret;
/* In sensor-to-memory mode, the stream can be started synchronously
* to the stream on command. In memory-to-memory mode, it will be
* started when buffers are queued on both the input and output.
*/
if (pipe->input)
return 0;
ret = omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_CONTINUOUS);
if (ret < 0) {
spin_lock_irqsave(&video->irqlock, flags);
omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED);
spin_unlock_irqrestore(&video->irqlock, flags);
return ret;
}
spin_lock_irqsave(&video->irqlock, flags);
if (list_empty(&video->dmaqueue))
video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
spin_unlock_irqrestore(&video->irqlock, flags);
return 0;
}
/*
* isp_video_buffer_queue - Add buffer to streaming queue
* @buf: Video buffer
*
* In memory-to-memory mode, start streaming on the pipeline if buffers are
* queued on both the input and the output, if the pipeline isn't already busy.
* If the pipeline is busy, it will be restarted in the output module interrupt
* handler.
*/
static void isp_video_buffer_queue(struct vb2_buffer *buf)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
struct isp_buffer *buffer = to_isp_buffer(vbuf);
struct isp_video *video = vfh->video;
struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
enum isp_pipeline_state state;
unsigned long flags;
unsigned int empty;
unsigned int start;
spin_lock_irqsave(&video->irqlock, flags);
if (unlikely(video->error)) {
vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
spin_unlock_irqrestore(&video->irqlock, flags);
return;
}
empty = list_empty(&video->dmaqueue);
list_add_tail(&buffer->irqlist, &video->dmaqueue);
spin_unlock_irqrestore(&video->irqlock, flags);
if (empty) {
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
state = ISP_PIPELINE_QUEUE_OUTPUT;
else
state = ISP_PIPELINE_QUEUE_INPUT;
spin_lock_irqsave(&pipe->lock, flags);
pipe->state |= state;
video->ops->queue(video, buffer);
video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
start = isp_pipeline_ready(pipe);
if (start)
pipe->state |= ISP_PIPELINE_STREAM;
spin_unlock_irqrestore(&pipe->lock, flags);
if (start)
omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_SINGLESHOT);
}
}
