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 f8b9431ee38e ("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] https://github.com/rockchip-linux/kernel/commit/f8b9431ee38ed561650be7092ab93f564598daa9
[2] https://raw.githubusercontent.com/rockchip-linux/kernel/f8b9431ee38ed561650be7092ab93f564598daa9/arch/arm64/boot/dts/rockchip/rk3568.dtsi
Suggested-by: Diederik de Haas <didi.debian@xxxxxxxxx>
Helped-by: Jonas Karlman <jonas@xxxxxxxxx>
Signed-off-by: Dragan Simic <dsimic@xxxxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk356x.dtsi | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk356x.dtsi b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
index ec772bce359a..e3c77dabc72b 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
@@ -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 {
