i915: GM45 has GM965-style MCH setup.
Fixes tiling swizzling mode failures that manifest in glReadPixels().
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index 6b3f1e4..e8b85ac 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -96,7 +96,8 @@
*/
swizzle_x = I915_BIT_6_SWIZZLE_NONE;
swizzle_y = I915_BIT_6_SWIZZLE_NONE;
- } else if ((!IS_I965G(dev) && !IS_G33(dev)) || IS_I965GM(dev)) {
+ } else if ((!IS_I965G(dev) && !IS_G33(dev)) || IS_I965GM(dev) ||
+ IS_GM45(dev)) {
uint32_t dcc;
/* On 915-945 and GM965, channel interleave by the CPU is
@@ -118,7 +119,7 @@
dcc & DCC_CHANNEL_XOR_DISABLE) {
swizzle_x = I915_BIT_6_SWIZZLE_9_10;
swizzle_y = I915_BIT_6_SWIZZLE_9;
- } else if (IS_I965GM(dev)) {
+ } else if (IS_I965GM(dev) || IS_GM45(dev)) {
/* GM965 only does bit 11-based channel
* randomization
*/