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From d282719a9c2fb0ee32830aa75b8dfbb9392954ed Mon Sep 17 00:00:00 2001
From: Jerome Glisse <jglisse@redhat.com>
Date: Wed, 04 Apr 2012 21:08:30 +0000
Subject: r6xx-r9xx: force 1D tiling for buffer with height < 64

Due to some old kernel issue, height is 8 aligned insided the ddx
For buffer with height btw 57 & 63 this lead ddx to believe it can
allocate a 2D tiled surface while mesa will not align height and
will assume 1D tiled leading to disagreement and rendering issue.
This patch force buffer with height < 64 to be 1D tiled.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
---
diff --git a/src/radeon_exa.c b/src/radeon_exa.c
index 99a5806..270dad4 100644
--- a/src/radeon_exa.c
+++ b/src/radeon_exa.c
@@ -511,6 +511,13 @@ void *RADEONEXACreatePixmap2(ScreenPtr pScreen, int width, int height,
 			surface.last_level = 0;
 			surface.bpe = cpp;
 			surface.nsamples = 1;
+			if (height < 64) {
+				/* disable 2d tiling for small surface to work around
+				 * the fact that ddx align height to 8 pixel for old
+				 * obscure reason i can't remember
+				 */
+				tiling &= ~RADEON_TILING_MACRO;
+			}
 			surface.flags = RADEON_SURF_SCANOUT;
 			surface.flags |= RADEON_SURF_SET(RADEON_SURF_TYPE_2D, TYPE);
 			surface.flags |= RADEON_SURF_SET(RADEON_SURF_MODE_LINEAR, MODE);
--
cgit v0.9.0.2-2-gbebe