[Intel-gfx] [PATCH 1/2] drm/i915/gen6+: Clear upper data byte during PCODE write

[Chris Wilson]

On Thu, Nov 24, 2016 at 05:32:58PM +0200, Imre Deak wrote:
> The spec calls for the upper data byte to be cleared before most of the
> PCODE write commands, for others like IPS control it doesn't say
> anything about this byte. Let's clear it in case it's clobbered somehow,
> especially that there are places where we only do a PCODE write without
> a preceeding PCODE read.
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Imre Deak <imre.deak at intel.com>

Seems sensible to me.
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre