From 87e062d4a93f1d78bd765256c826c338f7a0e921 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Thu, 18 Sep 2014 18:57:49 -0300 Subject: [PATCH] [media] v4l: omap3isp: Return buffers back to videobuf2 if pipeline streamon fails 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 Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/omap3isp/ispvideo.c | 46 +++++++++++++++++++++--------- 1 file changed, 32 insertions(+), 14 deletions(-) diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c index bc37467..f82b470 100644 --- a/drivers/media/platform/omap3isp/ispvideo.c +++ b/drivers/media/platform/omap3isp/ispvideo.c @@ -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); } -- 2.7.4