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drm/i915/guc: Don't forward flip interrupts to GuC 

Due to flip interrupts GuC stays awake always and GT does not enter
RC6. Do not route those interrupts to GuC for now. Driver won't touch
DE_GUCRMR register and leave it as what default value.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sagar Arun Kamble 2015-09-30 09:57:37 -07:00 committed by Daniel Vetter
parent 923c124107
commit 9d91a1bfae
1 changed files with 0 additions and 10 deletions
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10
drivers/gpu/drm/i915/intel_guc_loader.c
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@ -90,9 +90,6 @@ static void direct_interrupts_to_host(struct drm_i915_private *dev_priv)
for_each_ring(ring, dev_priv, i)
I915_WRITE(RING_MODE_GEN7(ring), irqs);
/* tell DE to send nothing to GuC */
I915_WRITE(DE_GUCRMR, ~0);
/* route all GT interrupts to the host */
I915_WRITE(GUC_BCS_RCS_IER, 0);
I915_WRITE(GUC_VCS2_VCS1_IER, 0);
@ -110,13 +107,6 @@ static void direct_interrupts_to_guc(struct drm_i915_private *dev_priv)
for_each_ring(ring, dev_priv, i)
I915_WRITE(RING_MODE_GEN7(ring), irqs);
/* tell DE to send (all) flip_done to GuC */
irqs = DERRMR_PIPEA_PRI_FLIP_DONE | DERRMR_PIPEA_SPR_FLIP_DONE |
DERRMR_PIPEB_PRI_FLIP_DONE | DERRMR_PIPEB_SPR_FLIP_DONE |
DERRMR_PIPEC_PRI_FLIP_DONE | DERRMR_PIPEC_SPR_FLIP_DONE;
/* Unmasked bits will cause GuC response message to be sent */
I915_WRITE(DE_GUCRMR, ~irqs);
/* route USER_INTERRUPT to Host, all others are sent to GuC. */
irqs = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;