When using RC6 timeout mode, the timeout value
should be written to GEN6_RC6_THRESHOLD.
v2: Updated commit message. (Tom)
Signed-off-by: Sagar Arun Kamble <sagar.a.kam...@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a878147..ebde43d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4842,7 +4842,6 @@ static void gen9_enable_rc6(struct drm_device *dev)
for_each_ring(ring, dev_priv, unused)
I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
I915_WRITE(GEN6_RC_SLEEP, 0);
- I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
/* 2c: Program Coarse Power Gating Policies. */
I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 25);
@@ -4854,15 +4853,19 @@ static void gen9_enable_rc6(struct drm_device *dev)
DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ?
"on" : "off");
+ /* WaRsUseTimeoutMode */
if ((IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_D0) ||
- (IS_BROXTON(dev) && INTEL_REVID(dev) <= BXT_REVID_A0))
+ (IS_BROXTON(dev) && INTEL_REVID(dev) <= BXT_REVID_A0)) {
+ I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us */
I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
GEN7_RC_CTL_TO_MODE |
rc6_mask);
- else
+ } else {
+ I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
GEN6_RC_CTL_EI_MODE(1) |
rc6_mask);
+ }
/*
* 3b: Enable Coarse Power Gating only when RC6 is enabled.
--
1.9.1
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