[PATCH 03/33] HACK: drm/omap: fix memory barrier bug in DMM driver

2016-02-24 Thread Tomi Valkeinen
On 23/02/16 23:13, Laurent Pinchart wrote: > Hi Tomi, > > Thank you for the patch. > > On Friday 19 February 2016 11:47:38 Tomi Valkeinen wrote: >> A DMM timeout "timed out waiting for done" has been observed on DRA7 >> devices. The timeout happens rarely, and only when the system is under >> hea

[PATCH 03/33] HACK: drm/omap: fix memory barrier bug in DMM driver

2016-02-23 Thread Laurent Pinchart
Hi Tomi, Thank you for the patch. On Friday 19 February 2016 11:47:38 Tomi Valkeinen wrote: > A DMM timeout "timed out waiting for done" has been observed on DRA7 > devices. The timeout happens rarely, and only when the system is under > heavy load. > > Debugging showed that the timeout can be m

[PATCH 03/33] HACK: drm/omap: fix memory barrier bug in DMM driver

2016-02-19 Thread Tomi Valkeinen
A DMM timeout "timed out waiting for done" has been observed on DRA7 devices. The timeout happens rarely, and only when the system is under heavy load. Debugging showed that the timeout can be made to happen much more frequently by optimizing the DMM driver, so that there's almost no code between