diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2016-02-26 15:29:32 -0600 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-09 13:15:23 -0500 |
| commit | f0adda6a9f5b1689cbf47dd56cf73da201c014d8 (patch) | |
| tree | eb36401f9a1024fc4d5605a759c5bf2b9e8beaea /drivers | |
| parent | b8ad68546922dd5acb6cd32628bc9ae69a4795f9 (diff) | |
drm/ast: Fix incorrect register check for DRAM width
[ Upstream commit 2d02b8bdba322b527c5f5168ce1ca10c2d982a78 ]
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@raptorengineeringinc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c index 035dacc93382..fd5c5f3370f6 100644 --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -227,7 +227,7 @@ static int ast_get_dram_info(struct drm_device *dev) } 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; |