This is a note to let you know that I've just added the patch titled
drm/radeon: Fix sideport problems on certain RS690 boards
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-fix-sideport-problems-on-certain-rs690-boards.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8333f0fe133be420ce3fcddfd568c3a559ab274e Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Mon, 2 Dec 2013 18:15:51 -0500
Subject: drm/radeon: Fix sideport problems on certain RS690 boards
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 8333f0fe133be420ce3fcddfd568c3a559ab274e upstream.
Some RS690 boards with 64MB of sideport memory show up as
having 128MB sideport + 256MB of UMA. In this case,
just skip the sideport memory and use UMA. This fixes
rendering corruption and should improve performance.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=35457
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/rs690.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -162,6 +162,16 @@ static void rs690_mc_init(struct radeon_
base = RREG32_MC(R_000100_MCCFG_FB_LOCATION);
base = G_000100_MC_FB_START(base) << 16;
rdev->mc.igp_sideport_enabled = radeon_atombios_sideport_present(rdev);
+ /* Some boards seem to be configured for 128MB of sideport memory,
+ * but really only have 64MB. Just skip the sideport and use
+ * UMA memory.
+ */
+ if (rdev->mc.igp_sideport_enabled &&
+ (rdev->mc.real_vram_size == (384 * 1024 * 1024))) {
+ base += 128 * 1024 * 1024;
+ rdev->mc.real_vram_size -= 128 * 1024 * 1024;
+ rdev->mc.mc_vram_size = rdev->mc.real_vram_size;
+ }
/* Use K8 direct mapping for fast fb access. */
rdev->fastfb_working = false;
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.10/drm-edid-add-quirk-for-bpc-in-samsung-np700g7a-s01pl-notebook.patch
queue-3.10/drm-radeon-fix-sideport-problems-on-certain-rs690-boards.patch
queue-3.10/drm-radeon-add-missing-display-tiling-setup-for-oland.patch
--
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