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drm/i915: Add frame buffer compression support on Ironlake mobile

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About 0.2W power can be saved on one HP laptop.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhao Yakui
2010-06-12 14:32:27 +08:00
committed by Eric Anholt
parent c936f44d1b
commit b52eb4dcab
6 changed files with 125 additions and 8 deletions
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drivers/gpu/drm/i915/i915_suspend.c
+7 -2
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@@ -602,7 +602,9 @@ void i915_save_display(struct drm_device *dev)
/* Only save FBC state on the platform that supports FBC */
if (I915_HAS_FBC(dev)) {
if (IS_GM45(dev)) {
if (IS_IRONLAKE_M(dev)) {
dev_priv->saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE);
} else if (IS_GM45(dev)) {
dev_priv->saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE);
} else {
dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
@@ -706,7 +708,10 @@ void i915_restore_display(struct drm_device *dev)
/* only restore FBC info on the platform that supports FBC*/
if (I915_HAS_FBC(dev)) {
if (IS_GM45(dev)) {
if (IS_IRONLAKE_M(dev)) {
ironlake_disable_fbc(dev);
I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
} else if (IS_GM45(dev)) {
g4x_disable_fbc(dev);
I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
} else {