[PATCH] [RFC] drm/radeon: clear WC flag when moving bo from vram to gtt
michel at daenzer.net
Mon Apr 24 10:08:47 UTC 2017
On 24/04/17 07:01 PM, Julien Isorce wrote:
> On 24 April 2017 at 10:51, Christian König <deathsimple at vodafone.de
> <mailto:deathsimple at vodafone.de>> wrote:
> Am 24.04.2017 um 11:42 schrieb Julien Isorce:
> But re-add the flag is the bo is moved back to vram.
> This fixes "ring 0/3 stalled" issue which happens when the driver
> evicts bo from vram to gtt, at least on TAHITI and CAPVERDE.
> Interesting find, but NAK on the approach for fixing it.
> Thx for the comments.
> If WC mappings don't work for TAHITI and CAPVERDE we need to figure
> out why or at least disable them for those hardware generations in
> Should I extend
> to BONAIRE (which will include VERDE and TAHITI) ? (to match
> https://cgit.freedesktop.org/~agd5f/linux/tree/drivers/gpu/drm/radeon/radeon_ib.c?h=amd-staging-4.9#n199 )
Not sure the issue is widespread / systemic enough to justify that
upstream. You can do whatever you deem appropriate in your project, of
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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