Re: [PATCH] arm64: dts: qcom: sm8550: Add missing CPU7 3.36GHz OPP

[Val Packett <val@packett.cool>]

On 11/4/26 4:41 PM, Nizat Mikayilli via B4 Relay wrote:
> From: Nizat Mikayilli <nacht@dxdmail.cc>
>
> The cpufreq LUT on the Samsung Galaxy Tab S9 Wi-Fi has a 3.36GHz boost
> entry for CPU7 without a matching OPP, so the frequency is dropped:
>
> cpu cpu7: Voltage update failed freq=3360000
> cpu cpu7: failed to update OPP for freq=3360000
>
> Fixes: 3f5dcc05cd33 ("arm64: dts: qcom: sm8550: add cpu OPP table with DDR, LLCC & L3 bandwidths")
> Signed-off-by: Nizat Mikayilli <nacht@dxdmail.cc>
> ---
>   arch/arm64/boot/dts/qcom/sm8550.dtsi | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 03f6d40edea7..ed6e34ac8d56 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -752,6 +752,11 @@ opp-3187200000 {
>   			opp-hz = /bits/ 64 <3187200000>;
>   			opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
>   		};
> +
> +		opp-3360000000 {
> +			opp-hz = /bits/ 64 <3360000000>;
> +			opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
> +		};
>   	};
>   
>   	pmu-a510 {
>
This seems variant/speedbin dependent and does not apply to all sm8550.

In fact a quick web search shows that your device has a "Snapdragon 8 
Gen 2 for Galaxy" which is a customized chip for Smasnug.

You should just add the OPP in your tablet's .dts I think.


Thanks,
~val