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drm/i915: Disable semaphore wait event idle message on BDW 

According to BSpec we need to always set this magic bit in ring buffer
mode.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-02-27 21:59:01 +02:00 committed by Daniel Vetter
parent 619d4d0472
commit 295e8bb73a
2 changed files with 6 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -949,6 +949,9 @@
#define GEN6_BLITTER_LOCK_SHIFT 16
#define GEN6_BLITTER_FBC_NOTIFY (1<<3)
#define GEN6_RC_SLEEP_PSMI_CONTROL 0x2050
#define GEN8_RC_SEMA_IDLE_MSG_DISABLE (1 << 12)
#define GEN6_BSD_SLEEP_PSMI_CONTROL 0x12050
#define GEN6_BSD_SLEEP_MSG_DISABLE (1 << 0)
#define GEN6_BSD_SLEEP_FLUSH_DISABLE (1 << 2)

3
drivers/gpu/drm/i915/intel_pm.c
View File

@ -4867,6 +4867,9 @@ static void gen8_init_clock_gating(struct drm_device *dev)
*/
I915_WRITE(GEN7_GT_MODE,
GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4);
I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
_MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
}
static void haswell_init_clock_gating(struct drm_device *dev)