Re: [PATCH v2 03/12] drm/exynos/decon5433: fix vblank event handling

2017-03-12 Thread Inki Dae
2017년 03월 09일 15:54에 Andrzej Hajda 이(가) 쓴 글: > On 09.03.2017 04:54, Michel Dänzer wrote: >> On 08/03/17 11:58 PM, Andrzej Hajda wrote: >>> Current implementation of event handling assumes that vblank interrupt is >>> always called at the right time. It is not true, it can be delayed due to >>> va

Re: [PATCH v2 03/12] drm/exynos/decon5433: fix vblank event handling

2017-03-08 Thread Andrzej Hajda
On 09.03.2017 04:54, Michel Dänzer wrote: > On 08/03/17 11:58 PM, Andrzej Hajda wrote: >> Current implementation of event handling assumes that vblank interrupt is >> always called at the right time. It is not true, it can be delayed due to >> various reasons. As a result different races can happen

Re: [PATCH v2 03/12] drm/exynos/decon5433: fix vblank event handling

2017-03-08 Thread Michel Dänzer
On 08/03/17 11:58 PM, Andrzej Hajda wrote: > Current implementation of event handling assumes that vblank interrupt is > always called at the right time. It is not true, it can be delayed due to > various reasons. As a result different races can happen. The patch fixes > the issue by using hardware

[PATCH v2 03/12] drm/exynos/decon5433: fix vblank event handling

2017-03-08 Thread Andrzej Hajda
Current implementation of event handling assumes that vblank interrupt is always called at the right time. It is not true, it can be delayed due to various reasons. As a result different races can happen. The patch fixes the issue by using hardware frame counter present in DECON to serialize vblank