This patch reverts the changes made in this commit:
deadcb36f49b ("drm/radeon: Use two-ended allocation by size, v2")
That patch caused a regression on my system where the bottom of the
screen flickers after my laptop goes thorough a suspend and resume.
This is reproducible 100% of the time.
This patch applies cleanly to v3.19, and fixes the screen flicker issue
on my system. Here is the hardware that I'm using (from lspci):
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] Seymour [Radeon HD 6400M/7400M Series]
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Lauri Kasanen <cand@xxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
drivers/gpu/drm/radeon/radeon_object.c | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 86fc564..dea1baf 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -173,17 +173,6 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
else
rbo->placements[i].lpfn = 0;
}
-
- /*
- * Use two-ended allocation depending on the buffer size to
- * improve fragmentation quality.
- * 512kb was measured as the most optimal number.
- */
- if (rbo->tbo.mem.size > 512 * 1024) {
- for (i = 0; i < c; i++) {
- rbo->placements[i].flags |= TTM_PL_FLAG_TOPDOWN;
- }
- }
}
int radeon_bo_create(struct radeon_device *rdev,
--
1.9.3
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