According to the V4L2 specification, poll() should set POLLOUT | POLLWRNORM flags for output devices after the frame has been displayed.
Signed-off-by: Pawel Osciak <[email protected]> Reviewed-by: Kyungmin Park <[email protected]> --- drivers/media/video/videobuf-core.c | 10 ++++++++-- 1 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c index 37afb4e..e93672a 100644 --- a/drivers/media/video/videobuf-core.c +++ b/drivers/media/video/videobuf-core.c @@ -1075,8 +1075,14 @@ unsigned int videobuf_poll_stream(struct file *file, if (0 == rc) { poll_wait(file, &buf->done, wait); if (buf->state == VIDEOBUF_DONE || - buf->state == VIDEOBUF_ERROR) - rc = POLLIN|POLLRDNORM; + buf->state == VIDEOBUF_ERROR) { + if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + rc = POLLIN | POLLRDNORM; + else if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) + rc = POLLOUT | POLLWRNORM; + else + BUG(); + } } mutex_unlock(&q->vb_lock); return rc; -- 1.7.0.31.g1df487 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
