From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Apparently we need to disable VCP unit clock gating around media reset
on g4x.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
drivers/gpu/drm/i915/intel_uncore.c | 36 +++++++++++++++++++++++++++++++++++-
2 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6522af4..543f23c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1724,6 +1724,10 @@ enum punit_power_well {
#define VF_UNIT_CLOCK_GATE_DISABLE (1 << 9)
#define GS_UNIT_CLOCK_GATE_DISABLE (1 << 7)
#define CL_UNIT_CLOCK_GATE_DISABLE (1 << 6)
+
+#define VDECCLK_GATE_D 0x620C /* g4x only */
+#define VCP_UNIT_CLOCK_GATE_DISABLE (1 << 4)
+
#define RAMCLK_GATE_D 0x6210 /* CRL only */
#define DEUC 0x6214 /* CRL only */
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index cd0d6e2..67385a9 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -990,6 +990,36 @@ static int i965_do_reset(struct drm_device *dev)
return 0;
}
+static int g4x_do_reset(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
+
+ pci_write_config_byte(dev->pdev, I965_GDRST,
+ GRDOM_RENDER | GRDOM_RESET_ENABLE);
+ ret = wait_for(i965_reset_complete(dev), 500);
+ if (ret)
+ return ret;
+
+ /* WaVcpClkGateDisableForMediaReset:ctg,elk */
+ I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
+ POSTING_READ(VDECCLK_GATE_D);
+
+ pci_write_config_byte(dev->pdev, I965_GDRST,
+ GRDOM_MEDIA | GRDOM_RESET_ENABLE);
+ ret = wait_for(i965_reset_complete(dev), 500);
+ if (ret)
+ return ret;
+
+ /* WaVcpClkGateDisableForMediaReset:ctg,elk */
+ I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
+ POSTING_READ(VDECCLK_GATE_D);
+
+ pci_write_config_byte(dev->pdev, I965_GDRST, 0);
+
+ return 0;
+}
+
static int ironlake_do_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1042,7 +1072,11 @@ int intel_gpu_reset(struct drm_device *dev)
case 7:
case 6: return gen6_do_reset(dev);
case 5: return ironlake_do_reset(dev);
- case 4: return i965_do_reset(dev);
+ case 4:
+ if (IS_G4X(dev))
+ return g4x_do_reset(dev);
+ else
+ return i965_do_reset(dev);
default: return -ENODEV;
}
}
--
1.8.5.5
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