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drm/i915: Enable RC6 on Ironlake.

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RC6 allows the GPU to enter a lower power state when the GPU is idle.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
[anholt: Fixed the !renderctx error path to actually not enable RC6.]
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zou Nan hai 2010-06-25 13:40:22 +08:00 committed by Eric Anholt
parent 8545423a91
commit ce17178094
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/i915/intel_display.c
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@ -5753,7 +5753,8 @@ void intel_init_clock_gating(struct drm_device *dev)
ILK_DPFC_DIS2 |
ILK_CLK_FBC);
}
return;
if (IS_GEN6(dev))
return;
} else if (IS_G4X(dev)) {
uint32_t dspclk_gate;
I915_WRITE(RENCLK_GATE_D1, 0);
@ -5814,9 +5815,11 @@ void intel_init_clock_gating(struct drm_device *dev)
OUT_RING(MI_FLUSH);
ADVANCE_LP_RING();
}
} else
} else {
DRM_DEBUG_KMS("Failed to allocate render context."
"Disable RC6\n");
"Disable RC6\n");
return;
}
}
if (I915_HAS_RC6(dev) && drm_core_check_feature(dev, DRIVER_MODESET)) {