i915: Save/restore MCHBAR_RENDER_STANDBY on GM965/GM45
This register is set by the 2D driver to prevent lockups, and so it needs to be preserved across suspend/resume too. This makes my X200s work. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@linux.ie>
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@ -157,6 +157,7 @@ typedef struct drm_i915_private {
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u32 saveDSPACNTR;
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u32 saveDSPBCNTR;
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u32 saveDSPARB;
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u32 saveRENDERSTANDBY;
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u32 savePIPEACONF;
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u32 savePIPEBCONF;
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u32 savePIPEASRC;
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@ -527,6 +527,9 @@
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#define C0DRB3 0x10206
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#define C1DRB3 0x10606
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/** GM965 GM45 render standby register */
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#define MCHBAR_RENDER_STANDBY 0x111B8
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/*
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* Overlay regs
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*/
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@ -240,6 +240,10 @@ int i915_save_state(struct drm_device *dev)
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pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
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/* Render Standby */
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if (IS_I965G(dev) && IS_MOBILE(dev))
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dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);
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/* Display arbitration control */
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dev_priv->saveDSPARB = I915_READ(DSPARB);
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@ -365,6 +369,11 @@ int i915_restore_state(struct drm_device *dev)
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pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
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/* Render Standby */
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if (IS_I965G(dev) && IS_MOBILE(dev))
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I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);
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/* Display arbitration */
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I915_WRITE(DSPARB, dev_priv->saveDSPARB);
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/* Pipe & plane A info */
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