[Intel-gfx] [PATCH] drm/i915: fix for WaDisableDopClockGating:bdw

[Robert Bragg]

This workaround for BDW was incomplete as it also requires EUTC clock
gating to be disabled via UCGCTL1.

Signed-off-by: Robert Bragg <robert at sixbynine.org>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 49fa8006c6a2..fa1b400a79d0 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -776,6 +776,7 @@ static int bdw_init_workarounds(struct intel_engine_cs *engine)
 	/* WaDisableDopClockGating:bdw */
 	WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
 			  DOP_CLOCK_GATING_DISABLE);
+	WA_SET_BIT(GEN6_UCGCTL1, GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE);
 
 	WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
 			  GEN8_SAMPLER_POWER_BYPASS_DIS);
-- 
2.11.0