drm/i915: Enable RC6 on Ironlake.
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>
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@ -5753,7 +5753,8 @@ void intel_init_clock_gating(struct drm_device *dev)
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ILK_DPFC_DIS2 |
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ILK_CLK_FBC);
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}
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return;
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if (IS_GEN6(dev))
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return;
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} else if (IS_G4X(dev)) {
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uint32_t dspclk_gate;
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I915_WRITE(RENCLK_GATE_D1, 0);
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@ -5814,9 +5815,11 @@ void intel_init_clock_gating(struct drm_device *dev)
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OUT_RING(MI_FLUSH);
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ADVANCE_LP_RING();
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}
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} else
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} else {
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DRM_DEBUG_KMS("Failed to allocate render context."
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"Disable RC6\n");
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"Disable RC6\n");
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return;
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}
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}
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if (I915_HAS_RC6(dev) && drm_core_check_feature(dev, DRIVER_MODESET)) {
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