drm/amdgpu/atomfirmware: fix parsing of vram_info

commit f6f49dd 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 <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c

@@ -387,7 +387,7 @@ 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;