v4l2_m2m_poll didn't support events, but that's essential if you want to
be able to use control events for example.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/video/v4l2-mem2mem.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/media/video/v4l2-mem2mem.c
b/drivers/media/video/v4l2-mem2mem.c
index 975d0fa..97b4831 100644
--- a/drivers/media/video/v4l2-mem2mem.c
+++ b/drivers/media/video/v4l2-mem2mem.c
@@ -19,6 +19,9 @@
#include <media/videobuf2-core.h>
#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
MODULE_DESCRIPTION("Mem to mem device framework for videobuf");
MODULE_AUTHOR("Pawel Osciak, <pa...@osciak.com>");
@@ -407,11 +410,24 @@ EXPORT_SYMBOL_GPL(v4l2_m2m_streamoff);
unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct poll_table_struct *wait)
{
+ struct video_device *vfd = video_devdata(file);
+ unsigned long req_events = poll_requested_events(wait);
struct vb2_queue *src_q, *dst_q;
struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
unsigned int rc = 0;
unsigned long flags;
+ if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
+ struct v4l2_fh *fh = file->private_data;
+
+ if (v4l2_event_pending(fh))
+ rc = POLLPRI;
+ else if (req_events & POLLPRI)
+ poll_wait(file, &fh->wait, wait);
+ if (!(req_events & (POLLOUT | POLLWRNORM | POLLIN |
POLLRDNORM)))
+ return rc;
+ }
+
src_q = v4l2_m2m_get_src_vq(m2m_ctx);
dst_q = v4l2_m2m_get_dst_vq(m2m_ctx);
@@ -422,7 +438,7 @@ unsigned int v4l2_m2m_poll(struct file *file, struct
v4l2_m2m_ctx *m2m_ctx,
*/
if ((!src_q->streaming || list_empty(&src_q->queued_list))
&& (!dst_q->streaming || list_empty(&dst_q->queued_list))) {
- rc = POLLERR;
+ rc |= POLLERR;
goto end;
}
--
1.7.10
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