Re: [PATCH v4 3/4] drm/vc4: Detect and ignore underruns caused by out-of-sync dlists

2019-02-20 Thread Paul Kocialkowski
Hi, On Wed, 2019-02-06 at 15:51 -0800, Eric Anholt wrote: > Paul Kocialkowski writes: > > > When the pipeline is reconfigured with a different mode, changes take > > effect immediately for the CRTC and encoder while the HVS takes some > > time to switch the active display list. This results in a

Re: [PATCH v4 3/4] drm/vc4: Detect and ignore underruns caused by out-of-sync dlists

2019-02-06 Thread Eric Anholt
Paul Kocialkowski writes: > When the pipeline is reconfigured with a different mode, changes take > effect immediately for the CRTC and encoder while the HVS takes some > time to switch the active display list. This results in a period of > time where the pipeline is out of sync, that is very lik

[PATCH v4 3/4] drm/vc4: Detect and ignore underruns caused by out-of-sync dlists

2019-02-06 Thread Paul Kocialkowski
When the pipeline is reconfigured with a different mode, changes take effect immediately for the CRTC and encoder while the HVS takes some time to switch the active display list. This results in a period of time where the pipeline is out of sync, that is very likely to cause an underrun to be repor