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arm64: dts: rockchip: Update GPU OPP voltages in RK356x SoC dtsi

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Update the values for the exact Rockchip RK356x GPU OPP voltages and the
lower limits for the GPU OPP voltage ranges, using the most conservative
values (i.e. the highest per-OPP voltages) found in the vendor kernel source
(cf. downstream commit f8b9431ee3 ("arm64: dts: rockchip: rk3568: support
adjust opp-table by otp")). [1][2]

Using the most conservative per-OPP voltages ensures reliable GPU operation
regardless of the actual GPU binning, with the downside of possibly using
a bit more power than absolutely needed.

[1] f8b9431ee3
[2] https://raw.githubusercontent.com/rockchip-linux/kernel/f8b9431ee38ed561650be7092ab93f564598daa9/arch/arm64/boot/dts/rockchip/rk3568.dtsi

Suggested-by: Diederik de Haas <didi.debian@cknow.org>
Helped-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/80301764e8983c8410c806ed2256403823709897.1719763100.git.dsimic@manjaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Dragan Simic 2024-06-30 18:00:41 +02:00 committed by Heiko Stuebner
parent 2e1fae8002
commit eb665b1c06
1 changed files with 5 additions and 5 deletions
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10
arch/arm64/boot/dts/rockchip/rk356x.dtsi
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@ -195,27 +195,27 @@ gpu_opp_table: opp-table-1 {
opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
opp-microvolt = <825000 825000 1000000>;
opp-microvolt = <850000 850000 1000000>;
};
opp-300000000 {
opp-hz = /bits/ 64 <300000000>;
opp-microvolt = <825000 825000 1000000>;
opp-microvolt = <850000 850000 1000000>;
};
opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-microvolt = <825000 825000 1000000>;
opp-microvolt = <850000 850000 1000000>;
};
opp-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <825000 825000 1000000>;
opp-microvolt = <900000 900000 1000000>;
};
opp-700000000 {
opp-hz = /bits/ 64 <700000000>;
opp-microvolt = <900000 900000 1000000>;
opp-microvolt = <950000 950000 1000000>;
};
opp-800000000 {