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drm/amdgpu/atomfirmware: fix parsing of vram_info

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BugLink: https://bugs.launchpad.net/bugs/2076435

commit f6f49dda49db72e7a0b4ca32c77391d5ff5ce232 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>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Alex Deucher
2024-06-14 13:48:26 -04:00
committed by Stefan Bader
parent ae3653b960
commit 91478ecff4
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+1 -1
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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;