drm/i915/gen9: Add WaFbcWakeMemOn

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Set bit 8 in 0x43224 to prevent screen corruption and system
hangs on high memory bandwidth conditions. The same wa also suggest
setting bit 31 on ARB_CTL. According to another workaround we gain
better idle power savings when FBC is enabled.

v2: use correct workaround name
v3: split out overlapping wa for corruption avoidance (Ville)

References: HSD#2137218, HSD#2227171, HSD#2136579, BSID#883
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-26-git-send-email-mika.kuoppala@intel.com

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Mika Kuoppala 2016-06-07 17:19:17 +03:00 • committed by Mika Kuoppala

parent 0f78dee6f0

commit 303d4ea522

2 changed files with 5 additions and 2 deletions

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1

drivers/gpu/drm/i915/i915_reg.h

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6

drivers/gpu/drm/i915/intel_pm.c

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