On 03/09/2018 09:49 AM, Gustavo Padovan wrote: > From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx> > > Drivers that use videobuf2 are capable of using fences and > should report that to userspace. > > The coding style is following what each drivers was already > doing. I think this can be simplified for most drivers: you can set this flag in the v4l_querycap function if vdev->queue is not NULL or if m2m_ctx is set in struct v4l2_fh. I believe all non-m2m drivers that use vb2 set vdev->queue. But not all m2m drivers will set m2m_ctx, so that will need to be checked. In other words, this way you only need to modify m2m drivers that do not set m2m_ctx. Regards, Hans
