From 344df9809f4521c8c11d67c5ef18764b54358950 Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Mon, 7 Dec 2015 18:29:44 +0200 Subject: drm/i915/skl: Disable coarse power gating up until F0 There is conflicting info between E0 and F0 steppings for this workarounds. Trust more authoritative source and be conservative and extend also for F0. This prevents numerous (>50) gpu hangs with SKL GT4e during piglit run. References: HSD: gen9lp/2134184 Cc: Sagar Arun Kamble Signed-off-by: Mika Kuoppala Reviewed-by: Sagar Arun Kamble Link: http://patchwork.freedesktop.org/patch/msgid/1449505785-20812-1-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 6686ece19f7446f0e29c77d9e0402e1d0ce10c48) Cc: stable@vger.kernel.org # v4.3+ Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_pm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/i915/intel_pm.c') diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 071a76b9ac52..183dd77b9681 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4825,7 +4825,7 @@ static void gen9_enable_rc6(struct drm_device *dev) * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6. */ if ((IS_BROXTON(dev) && (INTEL_REVID(dev) < BXT_REVID_B0)) || - ((IS_SKL_GT3(dev) || IS_SKL_GT4(dev)) && (INTEL_REVID(dev) <= SKL_REVID_E0))) + ((IS_SKL_GT3(dev) || IS_SKL_GT4(dev)) && (INTEL_REVID(dev) <= SKL_REVID_F0))) I915_WRITE(GEN9_PG_ENABLE, 0); else I915_WRITE(GEN9_PG_ENABLE, (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? -- cgit v1.2.3 From 6704d45528537ea6088aeea0667d87b605b82d51 Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Mon, 7 Dec 2015 18:29:45 +0200 Subject: drm/i915/skl: Double RC6 WRL always on WaRsDoubleRc6WrlWithCoarsePowerGating should be enabled for all Skylakes. Make it so. Cc: Sagar Arun Kamble Signed-off-by: Mika Kuoppala Reviewed-by: Sagar Arun Kamble Link: http://patchwork.freedesktop.org/patch/msgid/1449505785-20812-2-git-send-email-mika.kuoppala@intel.com (cherry picked from commit e7674b8c31717dd0c58b3a9493d43249722071eb) Cc: stable@vger.kernel.org # v4.3+ Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_pm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_pm.c') diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 183dd77b9681..f091ad12d694 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4782,8 +4782,7 @@ static void gen9_enable_rc6(struct drm_device *dev) /* 2b: Program RC6 thresholds.*/ /* WaRsDoubleRc6WrlWithCoarsePowerGating: Doubling WRL only when CPG is enabled */ - if (IS_SKYLAKE(dev) && !((IS_SKL_GT3(dev) || IS_SKL_GT4(dev)) && - (INTEL_REVID(dev) <= SKL_REVID_E0))) + if (IS_SKYLAKE(dev)) I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 108 << 16); else I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16); -- cgit v1.2.3