drm/i915: Add frame buffer compression support on Ironlake mobile
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>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 9289803..9ddb7b5 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1257,7 +1257,7 @@
drm_mm_put_block(compressed_fb);
}
- if (!IS_GM45(dev)) {
+ if (!(IS_GM45(dev) || IS_IRONLAKE_M(dev))) {
compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
4096, 0);
if (!compressed_llb) {
@@ -1283,8 +1283,9 @@
intel_disable_fbc(dev);
dev_priv->compressed_fb = compressed_fb;
-
- if (IS_GM45(dev)) {
+ if (IS_IRONLAKE_M(dev))
+ I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
+ else if (IS_GM45(dev)) {
I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
} else {
I915_WRITE(FBC_CFB_BASE, cfb_base);
@@ -1292,7 +1293,7 @@
dev_priv->compressed_llb = compressed_llb;
}
- DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
+ DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
ll_base, size >> 20);
}