drm/i915/gen9: Reintroduce WaEnableYV12BugFixInHalfSliceChicken7
This basically reverts commit 465418c6 ("drm/i915/gen9: Remove WaEnableYV12BugFixInHalfSliceChicken7") with small addition - marking it as affecting GLK as well. It was incorrectly considered fixed in production steppings. References: HSD#2126385, HSD#2131381, HSDES#1504433555, BSID#0764 Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Jeff McGee <jeff.mcgee@intel.com> Signed-off-by: NArkadiusz Hiler <arkadiusz.hiler@intel.com> Reviewed-by: NMika Kuoppala <mika.kuoppala@intel.com> [Mika: s/KBL/GLK on commit message] Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170512112015.19082-1-arkadiusz.hiler@intel.com
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