This is a note to let you know that I've just added the patch titled
drm/ast: Fix incorrect register check for DRAM width
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-ast-fix-incorrect-register-check-for-dram-width.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 2d02b8bdba322b527c5f5168ce1ca10c2d982a78 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 26 Feb 2016 15:29:32 -0600
Subject: drm/ast: Fix incorrect register check for DRAM width
From: Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxxxxx>
commit 2d02b8bdba322b527c5f5168ce1ca10c2d982a78 upstream.
During DRAM initialization on certain ASpeed devices, an incorrect
bit (bit 10) was checked in the "SDRAM Bus Width Status" register
to determine DRAM width.
Query bit 6 instead in accordance with the Aspeed AST2050 datasheet v1.05.
Signed-off-by: Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -124,7 +124,7 @@ static int ast_get_dram_info(struct drm_
} while (ast_read32(ast, 0x10000) != 0x01);
data = ast_read32(ast, 0x10004);
- if (data & 0x400)
+ if (data & 0x40)
ast->dram_bus_width = 16;
else
ast->dram_bus_width = 32;
Patches currently in stable-queue which might be from tpearson@xxxxxxxxxxxxxxxxxxxxxxxx are
queue-3.10/drm-ast-fix-incorrect-register-check-for-dram-width.patch
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