[PATCH v2 2/2] drm/omap: partial workaround for DRA7xx DMM errata i878

[Laurent Pinchart]

Hi Tomi,

On Wednesday, 4 April 2018 10:37:05 EEST Tomi Valkeinen wrote:
> On 04/04/18 00:11, Laurent Pinchart wrote:
> > I assume access to DMM-mapped buffers to be way more frequent than access
> > to the DMM registers. If that's the case, this partial workaround should
> > only slightly lower the probability of system lock-up. Do you have plans
> > to implement a workaround that will fix the problem completely ?
> 
> CPU only accesses memory via DMM when using TILER 2D buffers, which are
> not officially supported. For non-2D, the pages are mapped directly to
> the CPU without DMM in between.

What is the DMM used for with non-2D then ? Does it need to be setup at all ?

-- 
Regards,

Laurent Pinchart