[Mesa-dev] [PATCH] i965: Disable unlit-centroid workaround on Gen < 6.

[Matt Turner]

Back to the original commit (8313f444) adding the workaround, we were
enabling it on gens <= 7, even though gens <= 5 can't do multisampling.

I cannot find documentation that says that Sandybridge needs this
workaround but in practice disabling it causes these piglit tests to
fail:

EXT_framebuffer_multisample/interpolation {2,4} centroid-deriv{,-disabled}
---
 src/mesa/drivers/dri/i965/brw_device_info.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_device_info.c b/src/mesa/drivers/dri/i965/brw_device_info.c
index bbd907b..65942c2 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.c
+++ b/src/mesa/drivers/dri/i965/brw_device_info.c
@@ -28,7 +28,6 @@
 static const struct brw_device_info brw_device_info_i965 = {
    .gen = 4,
    .has_negative_rhw_bug = true,
-   .needs_unlit_centroid_workaround = true,
    .max_vs_threads = 16,
    .max_gs_threads = 2,
    .max_wm_threads = 8 * 4,
@@ -42,7 +41,6 @@ static const struct brw_device_info brw_device_info_g4x = {
    .has_pln = true,
    .has_compr4 = true,
    .has_surface_tile_offset = true,
-   .needs_unlit_centroid_workaround = true,
    .is_g4x = true,
    .max_vs_threads = 32,
    .max_gs_threads = 2,
@@ -57,7 +55,6 @@ static const struct brw_device_info brw_device_info_ilk = {
    .has_pln = true,
    .has_compr4 = true,
    .has_surface_tile_offset = true,
-   .needs_unlit_centroid_workaround = true,
    .max_vs_threads = 72,
    .max_gs_threads = 32,
    .max_wm_threads = 12 * 6,
-- 
2.0.4