diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 072211bf99e3..39770f7b333f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4471,9 +4471,15 @@ i915_gem_init_hw(struct drm_device *dev) LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED); if (HAS_PCH_NOP(dev)) { - u32 temp = I915_READ(GEN7_MSG_CTL); - temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); - I915_WRITE(GEN7_MSG_CTL, temp); + if (IS_IVYBRIDGE(dev)) { + u32 temp = I915_READ(GEN7_MSG_CTL); + temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); + I915_WRITE(GEN7_MSG_CTL, temp); + } else if (INTEL_INFO(dev)->gen >= 7) { + u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT); + temp &= ~RESET_PCH_HANDSHAKE_ENABLE; + I915_WRITE(HSW_NDE_RSTWRN_OPT, temp); + } } i915_gem_init_swizzling(dev); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 8a82c018d874..b958e854acb0 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4119,6 +4119,8 @@ #define GEN7_MSG_CTL 0x45010 #define WAIT_FOR_PCH_RESET_ACK (1<<1) #define WAIT_FOR_PCH_FLR_ACK (1<<0) +#define HSW_NDE_RSTWRN_OPT 0x46408 +#define RESET_PCH_HANDSHAKE_ENABLE (1<<4) /* GEN7 chicken */ #define GEN7_COMMON_SLICE_CHICKEN1 0x7010