Hello,
I'm writing a driver for a video overlay device and have the problem
that if I first playback a video with a resolution of say 320x240 and
then another one with 640x400 the buffers allocated for the first
playback are too small, but my .queue_setup callback isn't called.
I think the culprit is the following line in vb2_reqbufs()
(drivers/media/video/videobuf2-core.c):
/*
* If the same number of buffers and memory access method is requested
* then return immediately.
*/
if (q->memory == req->memory && req->count == q->num_buffers)
return 0;
which exits vb2_reqbufs before
ret = call_qop(q, queue_setup, q, &num_buffers, &num_planes,
plane_sizes, q->alloc_ctx);
Reading the vb1 code, this shortcut isn't implemented there.
As I'm quite new to all that v4l2 stuff, I'm not sure what to do.
Just removing the return 0 (i.e. reverting 31901a07) seems to do the
right thing for me.
Thoughts?
Thanks and best regards,
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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