[PATCH] drm/ast: Fix incorrect register check for DRAM width
Timothy Pearson
tpearson at raptorengineeringinc.com
Tue Mar 1 18:58:54 UTC 2016
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On 02/26/2016 03:29 PM, Timothy Pearson wrote:
> 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 at raptorengineeringinc.com>
> ---
> drivers/gpu/drm/ast/ast_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
> index 9759009..b1480ac 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;
Just wanted to give this a bump since I have not received any feedback
on it.
Thanks!
- --
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
http://www.raptorengineeringinc.com
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