ACK: Re: [PATCH 0/1][SRU][Q] xe: [drm] *ERROR* Unexpected child device config size 44 (expected 40 for VBT version 266)

[Paolo Pisati]

On Tue, Oct 21, 2025 at 02:48:30PM +0800, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2129157
> 
> [Impact]
> Pantherlake device has VBT (Video BIOS Table) version 266, which reports a
> child device config size of 44 bytes. However, the kernel expected only 40
> bytes, causing the error:
>    ERROR Unexpected child device config size 44 (expected 40 for VBT version 266)
> 
> [Fix]
> This commit included in v6.18-rc1 fix the issue
> 4d33c77cf2c3 drm/i915/vbt: Add eDP Data rate overrride field in VBT
> 
> [Test]
> Boot up PTL system and check dmesg, there should be no the error message like
> xe: [drm] ERROR Unexpected child device config size 44 (expected 40 for VBT version 266)
> 
> [Where problems could occur]
> No, it adds the setting for the latest PTL device with link rate equal to 263.
> 
> Suraj Kandpal (1):
>   drm/i915/vbt: Add eDP Data rate overrride field in VBT
> 
>  drivers/gpu/drm/i915/display/intel_bios.c     |  4 +++-
>  drivers/gpu/drm/i915/display/intel_vbt_defs.h | 18 ++++++++++++++++++
>  2 files changed, 21 insertions(+), 1 deletion(-)
> 
> -- 
> 2.43.0
> 
> 
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Acked-by: Paolo Pisati <paolo.pisati at canonical.com>
-- 
bye,
p.