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drm/amdgpu/atomfirmware: fix parsing of vram_info

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commit f6f49dda49 upstream.

v3.x changed the how vram width was encoded.  The previous
implementation actually worked correctly for most boards.
Fix the implementation to work correctly everywhere.

This fixes the vram width reported in the kernel log on
some boards.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2024-06-14 13:48:26 -04:00 committed by Greg Kroah-Hartman
parent 89d8a85154
commit 01f58871af
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
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@ -399,7 +399,7 @@ amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
mem_channel_number = vram_info->v30.channel_num;
mem_channel_width = vram_info->v30.channel_width;
if (vram_width)
*vram_width = mem_channel_number * (1 << mem_channel_width);
*vram_width = mem_channel_number * 16;
break;
default:
return -EINVAL;