From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Reviewed-by: Ben Widawsky <ben@xxxxxxxxxxxx> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx> [BDW 3.14 backport] Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx> --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_pm.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 1240250..db70031 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4868,6 +4868,9 @@ #define GEN7_UCGCTL4 0x940c #define GEN7_L3BANK2X_CLOCK_GATE_DISABLE (1<<25) +#define GEN8_UCGCTL6 0x9430 +#define GEN8_SDEUNIT_CLOCK_GATE_DISABLE (1<<14) + #define GEN6_RPNSWREQ 0xA008 #define GEN6_TURBO_DISABLE (1<<31) #define GEN6_FREQUENCY(x) ((x)<<25) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 7b79c18..a0c6add 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4758,6 +4758,10 @@ static void gen8_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL, _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE)); + + /* WaDisableSDEUnitClockGating:bdw */ + I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) | + GEN8_SDEUNIT_CLOCK_GATE_DISABLE); } static void haswell_init_clock_gating(struct drm_device *dev) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html