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[media] v4l: omap3isp: Return buffers back to videobuf2 if pipeline streamon fails

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When the video buffer queue was stopped before the stream source was started
in omap3isp_streamon(), the buffers were not returned back to videobuf2.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Sakari Ailus 2014-09-18 18:57:49 -03:00 committed by Mauro Carvalho Chehab
parent 35c5f63773
commit 87e062d4a9
1 changed files with 32 additions and 14 deletions
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46
drivers/media/platform/omap3isp/ispvideo.c
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@ -434,6 +434,30 @@ static void isp_video_buffer_queue(struct vb2_buffer *buf)
}
}
/*
* omap3isp_video_return_buffers - Return all queued buffers to videobuf2
* @video: ISP video object
* @state: new state for the returned buffers
*
* Return all buffers queued on the video node to videobuf2 in the given state.
* The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error
* when starting the stream, or VB2_BUF_STATE_ERROR otherwise.
*
* The function must be called with the video irqlock held.
*/
static void omap3isp_video_return_buffers(struct isp_video *video,
enum vb2_buffer_state state)
{
while (!list_empty(&video->dmaqueue)) {
struct isp_buffer *buf;
buf = list_first_entry(&video->dmaqueue,
struct isp_buffer, irqlist);
list_del(&buf->irqlist);
vb2_buffer_done(&buf->vb.vb2_buf, state);
}
}
static int isp_video_start_streaming(struct vb2_queue *queue,
unsigned int count)
{
@ -452,8 +476,12 @@ static int isp_video_start_streaming(struct vb2_queue *queue,
ret = omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_CONTINUOUS);
if (ret < 0)
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))
@ -571,26 +599,16 @@ struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
* omap3isp_video_cancel_stream - Cancel stream on a video node
* @video: ISP video object
*
* Cancelling a stream mark all buffers on the video node as erroneous and makes
* sure no new buffer can be queued.
* Cancelling a stream returns all buffers queued on the video node to videobuf2
* in the erroneous state and makes sure no new buffer can be queued.
*/
void omap3isp_video_cancel_stream(struct isp_video *video)
{
unsigned long flags;
spin_lock_irqsave(&video->irqlock, flags);
while (!list_empty(&video->dmaqueue)) {
struct isp_buffer *buf;
buf = list_first_entry(&video->dmaqueue,
struct isp_buffer, irqlist);
list_del(&buf->irqlist);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR);
video->error = true;
spin_unlock_irqrestore(&video->irqlock, flags);
}