08.04.2020 00:08, Sowjanya Komatineni пишет: ... >>> I think you need a semaphore with resource count = 2. >> we hold on to issuing capture if more than 2 buffers are queued and it >> continues only after fifo has min 1 slot empty > > > Just want to close on this part of feedback. Hope above explanation is > clear regarding triggering/issuing at max 2 frame capture to VI HW and > also regarding capture threads where they use wait_event_interruptible > to prevent blocking waiting for buffers to be available for captures. > > So no changes related to this part are needed in v7. >From what I see in the code, you "hold on" by making kthread to spin in a busy-loop while caps_inflight >= SYNCPT_FIFO_DEPTH. So some change should be needed to prevent this. The wait_event_interruptible seems should be okay.
