From 2856f9e3167564d214a51c6958305f4289246c69 Mon Sep 17 00:00:00 2001 From: Arun Siluvery Date: Mon, 3 Aug 2015 20:24:56 +0100 Subject: [PATCH] drm/i915:skl: Add WaEnableGapsTsvCreditFix Cc: Ben Widawsky Cc: Joonas Lahtinen Signed-off-by: Arun Siluvery --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_pm.c | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3a77678..be87e3b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6851,6 +6851,9 @@ enum skl_disp_power_wells { #define GEN7_MISCCPCTL (0x9424) #define GEN7_DOP_CLOCK_GATE_ENABLE (1<<0) +#define GEN8_GARBCNTL 0xB004 +#define GEN9_GAPS_TSV_CREDIT_DISABLE (1<<7) + /* IVYBRIDGE DPF */ #define GEN7_L3CDERRST1 0xB008 /* L3CD Error Status 1 */ #define HSW_L3CDERRST11 0xB208 /* L3CD Error Status register 1 slice 1 */ diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 4150bf8..fff0c22 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -102,6 +102,12 @@ static void skl_init_clock_gating(struct drm_device *dev) /* WaDisableLSQCROPERFforOCL:skl */ I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) | GEN8_LQSC_RO_PERF_DIS); + + /* WaEnableGapsTsvCreditFix:skl */ + if (IS_SKYLAKE(dev) && (INTEL_REVID(dev) >= SKL_REVID_C0)) { + I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | + GEN9_GAPS_TSV_CREDIT_DISABLE)); + } } static void bxt_init_clock_gating(struct drm_device *dev) -- 2.1.4