Re: [PATCH v2 3/3] arm64: dts: qcom: Add Microsoft Surface Laptop 8th Edition

[Gopikrishna Garmidi]

On 11/2/2026 7:17 PM, Konrad Dybcio wrote:
> On 10/27/26 8:33 AM, Gopikrishna Garmidi wrote:
> > Add support for the Microsoft Surface Laptop 13.8" 8th Edition, which is
> > built on the Mahua SoC. Most of the board follows the Qualcomm reference
> > design. The keyboard, fan and platform profile sit behind the Surface
> > Aggregator Module on uart22, same as on the Surface Laptop 7.
>
> [...]
>
>
> > +		serial0 = &uart22;
> > +		serial1 = &uart14;
> > +	};
> > +
> > +	chosen {
> > +		stdout-path = "serial0:115200n8";
> > +	};
>
> This sends console output straight into your EC, either enable the
> debug UART and point it there or remove this hunk

Right, thanks. There is no accessible debug UART on this machine
(uart21 is not routed out), so I'll drop the chosen node in v3.

> [...]
>
> > +	reserved-memory {
> > +		linux,cma {
> > +			compatible = "shared-dma-pool";
> > +			size = <0x0 0x8000000>;
> > +			reusable;
> > +			linux,cma-default;
> > +		};
> > +	};
>
> This hunk should not be necessary, it was on Hamoa laptops because we
> didn't have control over the PCIe SMMU and needed a CMA space

Ack, will drop it in v3.

Thanks,
Gopikrishna