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Date: Tue, 30 Jan 2024 22:21:16 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>,
Dragan Simic <dsimic@...jaro.org>, Viresh Kumar <viresh.kumar@...aro.org>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
Alexey Charkov <alchark@...il.com>
Subject: [PATCH v2 4/4] arm64: dts: rockchip: Add further granularity in
RK3588 CPU OPPs
This introduces additional OPPs that share the same voltage as
another OPP already present in the .dtsi but with lower frequency.
The idea is to try and limit system throughput more gradually upon
reaching the throttling condition for workloads that are close to
sustainable power already, thus avoiding needless performance loss.
My limited synthetic benchmarking [1] showed around 3.8% performance
benefit when these are in place, other things equal (not meant to
be comprehensive though).
[1] https://lore.kernel.org/linux-rockchip/CABjd4YxqarUCbZ-a2XLe3TWJ-qjphGkyq=wDnctnEhdoSdPPpw@mail.gmail.com/T/#me92aa0ee25e6eeb1d1501ce85f5af4e58b3b13c5
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 87 +++++++++++++++++++++++++++++++
1 file changed, 87 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index af8b932a04c1..506676985a7e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -360,6 +360,21 @@ cluster0_opp_table: opp-table-cluster0 {
compatible = "operating-points-v2";
opp-shared;
+ opp-408000000 {
+ opp-hz = /bits/ 64 <408000000>;
+ opp-microvolt = <675000 675000 950000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <675000 675000 950000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-816000000 {
+ opp-hz = /bits/ 64 <816000000>;
+ opp-microvolt = <675000 675000 950000>;
+ clock-latency-ns = <40000>;
+ };
opp-1008000000 {
opp-hz = /bits/ 64 <1008000000>;
opp-microvolt = <675000 675000 950000>;
@@ -392,6 +407,27 @@ cluster1_opp_table: opp-table-cluster1 {
compatible = "operating-points-v2";
opp-shared;
+ opp-408000000 {
+ opp-hz = /bits/ 64 <408000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ opp-suspend;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-816000000 {
+ opp-hz = /bits/ 64 <816000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
opp-1200000000 {
opp-hz = /bits/ 64 <1200000000>;
opp-microvolt = <675000 675000 1000000>;
@@ -422,6 +458,21 @@ opp-2208000000 {
opp-microvolt = <987500 987500 1000000>;
clock-latency-ns = <40000>;
};
+ opp-2256000000 {
+ opp-hz = /bits/ 64 <2256000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2304000000 {
+ opp-hz = /bits/ 64 <2304000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2352000000 {
+ opp-hz = /bits/ 64 <2352000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
opp-2400000000 {
opp-hz = /bits/ 64 <2400000000>;
opp-microvolt = <1000000 1000000 1000000>;
@@ -433,6 +484,27 @@ cluster2_opp_table: opp-table-cluster2 {
compatible = "operating-points-v2";
opp-shared;
+ opp-408000000 {
+ opp-hz = /bits/ 64 <408000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ opp-suspend;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-816000000 {
+ opp-hz = /bits/ 64 <816000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
opp-1200000000 {
opp-hz = /bits/ 64 <1200000000>;
opp-microvolt = <675000 675000 1000000>;
@@ -463,6 +535,21 @@ opp-2208000000 {
opp-microvolt = <987500 987500 1000000>;
clock-latency-ns = <40000>;
};
+ opp-2256000000 {
+ opp-hz = /bits/ 64 <2256000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2304000000 {
+ opp-hz = /bits/ 64 <2304000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2352000000 {
+ opp-hz = /bits/ 64 <2352000000>;
+ opp-microvolt = <1000000 1000000 1000000>;
+ clock-latency-ns = <40000>;
+ };
opp-2400000000 {
opp-hz = /bits/ 64 <2400000000>;
opp-microvolt = <1000000 1000000 1000000>;
--
2.43.0
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