Re: [PATCH] arm64: dts: qcom: hamoa: Set MDP MMCX corners to LOW_SVS per Windows

[Konrad Dybcio]

On 5/24/26 1:57 PM, Daniel J Blueman wrote:
> On the Lenovo Slim 7x with Qualcomm X1 E80100, the current Windows ACPI
> DSDT votes LOW_SVS (0x40) for all 7 MMCX OPP packages in the _SB.PEP0.G0MD
> F-state EXIT package:
> 
> "FSTATE",
> Zero,
> Package (...)
> {
>    "EXIT",
>    Package (0x02)
>    {
>        "NPARESOURCE",
>        Package (0x03)
>        {
>            One,
>            "/arc/client/rail_mmcx",
>            0x40
>        }
>    },
>    ...
> },
> 
> Apply the same in Linux for power saving opportunity. Validated on Lenovo
> Slim7x across daily workloads over 2 weeks with the internal 2944x1840
> panel @ 90Hz and a 3840x2160 @ 60Hz monitor over USB-C MST DP alt.

This ""works"" because the DP host holds a higher vote on the same rail

The max frequency for the MDP core clock at LOWSVS is 200 MHz, so this
patch is incorrect

Konrad