diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index ca4737e5cdfdec7fa0a439307682c16e295450c6..4e1ee909a80bc81439caaf9a020252b3bab670ff 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3035,6 +3035,10 @@ #define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030 #define GEN7_WA_L3_CHICKEN_MODE 0x20000000 +/* WaCatErrorRejectionIssue */ +#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030 +#define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11) + /* PCH */ /* south display engine interrupt */ diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 928840aaeb064ddaf00be0e43086e2e8d30ec44b..a5276150b8f8e6b901c821fd3646bf688b89d80d 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8478,6 +8478,11 @@ static void ivybridge_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); + /* This is required by WaCatErrorRejectionIssue */ + I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, + I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | + GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); + for_each_pipe(pipe) { I915_WRITE(DSPCNTR(pipe), I915_READ(DSPCNTR(pipe)) |