Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel into drm-fixes

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel:
  drm/i915: do not enable RC6p on Sandy Bridge
  drm/i915: gen7: Disable the RHWO optimization as it can cause GPU hangs.
  drm/i915: gen7: work around a system hang on IVB
  drm/i915: gen7: Implement an L3 caching workaround.
  drm/i915: gen7: implement rczunit workaround

1 files changed, 22 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 00fbff5ddd81..f425b23e3803 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8184,8 +8184,8 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv)
         I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
 
         if (intel_enable_rc6(dev_priv->dev))
-                rc6_mask = GEN6_RC_CTL_RC6p_ENABLE |
-                        GEN6_RC_CTL_RC6_ENABLE;
+                rc6_mask = GEN6_RC_CTL_RC6_ENABLE |
+                        (IS_GEN7(dev_priv->dev)) ? GEN6_RC_CTL_RC6p_ENABLE : 0;
 
         I915_WRITE(GEN6_RC_CONTROL,
                    rc6_mask |
@@ -8463,12 +8463,32 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
         I915_WRITE(WM2_LP_ILK, 0);
         I915_WRITE(WM1_LP_ILK, 0);
 
+        /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
+         * This implements the WaDisableRCZUnitClockGating workaround.
+         */
+        I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
+
         I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE);
 
         I915_WRITE(IVB_CHICKEN3,
                    CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
                    CHICKEN3_DGMG_DONE_FIX_DISABLE);
 
+        /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
+        I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
+                   GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
+
+        /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
+        I915_WRITE(GEN7_L3CNTLREG1,
+                        GEN7_WA_FOR_GEN7_L3_CONTROL);
+        I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
+                        GEN7_WA_L3_CHICKEN_MODE);
+
+        /* This is required by WaCatErrorRejectionIssue */
+        I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
+                        I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
+                        GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
+
         for_each_pipe(pipe) {
                 I915_WRITE(DSPCNTR(pipe),
                            I915_READ(DSPCNTR(pipe)) |