Re: [PATCH] dt: arm64: qcom: sc8280xp-blackrock: amend usb0-sbu-mux enable gpio

From: Jérôme de Bretagne

Date: Sun May 17 2026 - 06:09:56 EST




On 5/17/26 12:03, Jérôme de Bretagne wrote:
On 6/9/25 22:53, Jens Glathe wrote:
The usb0 port didn't switch to dp altmode, investigation into DSDT
UCS0 device resulted into GPIO 100.

Signed-off-by: Jens Glathe <jens.glathe@xxxxxxxxxxxxxxxxxxxxxx>

Tested:by: Jérome de Bretagne <jerome.debretagne@xxxxxxxxx>

Sorry for the typo, I meant:

Tested-by: Jérome de Bretagne <jerome.debretagne@xxxxxxxxx>


The same issue was impacting the other sc8280xp-based model from
Microsoft, which is sharing an almost identical board:

The top USB-C port (usb0) didn't switch to DP alt mode, as reusing the
same GPIO 101 as on the SC8280XP CRD or Lenovo ThinkPad X13s was not
working on the Surface Pro 9 5G (arcata) either.

Switching to GPIO 100 fixed the issue on arcata as well, to finally.
enable external screen when using the left-side top USB-C port. I
will send the fix for the Surface Pro 9 5G as part of a series
fixing various issues and limitations in its initial device tree.

Thank you,
Jérôme