From: Sagar Arun Kamble Date: Thu, 1 Oct 2015 14:59:27 +0000 (+0530) Subject: drm/i915: Update Promotion timer for RC6 TO Mode X-Git-Tag: firefly_0821_release~176^2~721^2~21^2~39 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3e7732a05d3b14e2ae33013622ae9c691b419312;p=firefly-linux-kernel-4.4.55.git drm/i915: Update Promotion timer for RC6 TO Mode When using RC6 timeout mode, the timeout value should be written to GEN6_RC6_THRESHOLD. v2: Updated commit message. (Tom) v3: Rebase over whitespace differences. (Daniel) Cc: Tom O'Rourke Signed-off-by: Sagar Arun Kamble Reviewed-by: Tom O'Rourke Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index eb9a66d3a477..60d120c472ab 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4730,7 +4730,6 @@ static void gen9_enable_rc6(struct drm_device *dev) I915_WRITE(GUC_MAX_IDLE_COUNT, 0xA); 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); @@ -4741,16 +4740,19 @@ static void gen9_enable_rc6(struct drm_device *dev) rc6_mask = GEN6_RC_CTL_RC6_ENABLE; 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.