Re: [PATCH v4 31/78] drm/vc4: crtc: Clear the PixelValve FIFO during configuration

2020-07-28 Thread Dave Stevenson
Hi Maxime On Wed, 8 Jul 2020 at 18:43, Maxime Ripard wrote: > > Even though it's not really clear why we need to flush the PV FIFO during > the configuration even though we started by flushing it, experience shows > that without it we get a stale pixel stuck in the FIFO between the HVS and > the

[PATCH v4 31/78] drm/vc4: crtc: Clear the PixelValve FIFO during configuration

2020-07-09 Thread Maxime Ripard
Even though it's not really clear why we need to flush the PV FIFO during the configuration even though we started by flushing it, experience shows that without it we get a stale pixel stuck in the FIFO between the HVS and the PV. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_crtc.c