Re: [Intel-gfx] [PATCH 1/3] drm/i915/gen9_bc: Work around DMC bug zeroing power well requests

2018-11-09 Thread Imre Deak
On Fri, Nov 09, 2018 at 05:04:40PM +0200, Ville Syrjälä wrote: > On Fri, Nov 09, 2018 at 04:58:20PM +0200, Imre Deak wrote: > > A DMC bug on GEN9 big core machines fails to restore the driver's > > request bits for the PW1 and MISC_IO power wells after a DC5/6 > > entry->exit sequence. As a

Re: [Intel-gfx] [PATCH 1/3] drm/i915/gen9_bc: Work around DMC bug zeroing power well requests

2018-11-09 Thread Ville Syrjälä
On Fri, Nov 09, 2018 at 04:58:20PM +0200, Imre Deak wrote: > A DMC bug on GEN9 big core machines fails to restore the driver's > request bits for the PW1 and MISC_IO power wells after a DC5/6 > entry->exit sequence. As a consequence the driver's subsequent check for > the enabled status of these

[Intel-gfx] [PATCH 1/3] drm/i915/gen9_bc: Work around DMC bug zeroing power well requests

2018-11-09 Thread Imre Deak
A DMC bug on GEN9 big core machines fails to restore the driver's request bits for the PW1 and MISC_IO power wells after a DC5/6 entry->exit sequence. As a consequence the driver's subsequent check for the enabled status of these power wells will fail, as the check considers the power wells being