Re: [PATCH 4/4] arm64: dts: rockchip: Add OPP data for CPU cores on RK3588

From: Daniel Lezcano
Date: Thu Jan 25 2024 - 04:32:59 EST

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In reply to: Alexey Charkov: "[PATCH 4/4] arm64: dts: rockchip: Add OPP data for CPU cores on RK3588"
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Hi Alexey,

Adding Viresh

On 24/01/2024 21:30, Alexey Charkov wrote:

By default the CPUs on RK3588 start up in a conservative performance
mode. Add frequency and voltage mappings to the device tree to enable
dynamic scaling via cpufreq

Signed-off-by: Alexey Charkov <alchark@xxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 209 ++++++++++++++++++++++++++++++
1 file changed, 209 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index 131b9eb21398..e605be531a0f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -97,6 +97,7 @@ cpu_l0: cpu@0 {
clocks = <&scmi_clk SCMI_CLK_CPUL>;
assigned-clocks = <&scmi_clk SCMI_CLK_CPUL>;
assigned-clock-rates = <816000000>;
+ operating-points-v2 = <&cluster0_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <32768>;
i-cache-line-size = <64>;
@@ -116,6 +117,7 @@ cpu_l1: cpu@100 {
enable-method = "psci";
capacity-dmips-mhz = <530>;
clocks = <&scmi_clk SCMI_CLK_CPUL>;
+ operating-points-v2 = <&cluster0_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <32768>;
i-cache-line-size = <64>;
@@ -135,6 +137,7 @@ cpu_l2: cpu@200 {
enable-method = "psci";
capacity-dmips-mhz = <530>;
clocks = <&scmi_clk SCMI_CLK_CPUL>;
+ operating-points-v2 = <&cluster0_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <32768>;
i-cache-line-size = <64>;
@@ -154,6 +157,7 @@ cpu_l3: cpu@300 {
enable-method = "psci";
capacity-dmips-mhz = <530>;
clocks = <&scmi_clk SCMI_CLK_CPUL>;
+ operating-points-v2 = <&cluster0_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <32768>;
i-cache-line-size = <64>;
@@ -175,6 +179,7 @@ cpu_b0: cpu@400 {
clocks = <&scmi_clk SCMI_CLK_CPUB01>;
assigned-clocks = <&scmi_clk SCMI_CLK_CPUB01>;
assigned-clock-rates = <816000000>;
+ operating-points-v2 = <&cluster1_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <65536>;
i-cache-line-size = <64>;
@@ -194,6 +199,7 @@ cpu_b1: cpu@500 {
enable-method = "psci";
capacity-dmips-mhz = <1024>;
clocks = <&scmi_clk SCMI_CLK_CPUB01>;
+ operating-points-v2 = <&cluster1_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <65536>;
i-cache-line-size = <64>;
@@ -215,6 +221,7 @@ cpu_b2: cpu@600 {
clocks = <&scmi_clk SCMI_CLK_CPUB23>;
assigned-clocks = <&scmi_clk SCMI_CLK_CPUB23>;
assigned-clock-rates = <816000000>;
+ operating-points-v2 = <&cluster2_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <65536>;
i-cache-line-size = <64>;
@@ -234,6 +241,7 @@ cpu_b3: cpu@700 {
enable-method = "psci";
capacity-dmips-mhz = <1024>;
clocks = <&scmi_clk SCMI_CLK_CPUB23>;
+ operating-points-v2 = <&cluster2_opp_table>;
cpu-idle-states = <&CPU_SLEEP>;
i-cache-size = <65536>;
i-cache-line-size = <64>;
@@ -348,6 +356,207 @@ l3_cache: l3-cache {
};
};
+ 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>;
+ clock-latency-ns = <40000>;
+ };

It is not useful to introduce OPP with the same voltage. There is no gain in terms of energy efficiency as the compute capacity is linearly tied with power consumption (P=CxFxV²) in this case.

For example, opp-408 consumes 2 bogoWatts and opp-816 consumes 4 bogoWatts (because of the same voltage).

For a workload, opp-408 takes 10 sec and opp-816 takes 5 sec because it is twice faster.

The energy consumption is:

opp-408 = 10 x 2 = 20 BogoJoules
opp-816 = 5 x 4 = 20 BogoJoules

+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <712500 712500 950000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1416000000 {
+ opp-hz = /bits/ 64 <1416000000>;
+ opp-microvolt = <762500 762500 950000>;
+ clock-latency-ns = <40000>;
+ opp-suspend;
+ };
+ opp-1608000000 {
+ opp-hz = /bits/ 64 <1608000000>;
+ opp-microvolt = <850000 850000 950000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <950000 950000 950000>;
+ clock-latency-ns = <40000>;
+ };
+ };
+
+ 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>;
+ };

same comment

+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <675000 675000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1416000000 {
+ opp-hz = /bits/ 64 <1416000000>;
+ opp-microvolt = <725000 725000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1608000000 {
+ opp-hz = /bits/ 64 <1608000000>;
+ opp-microvolt = <762500 762500 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <850000 850000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2016000000 {
+ opp-hz = /bits/ 64 <2016000000>;
+ opp-microvolt = <925000 925000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2208000000 {
+ opp-hz = /bits/ 64 <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>;
+ clock-latency-ns = <40000>;
+ };

Same comment

+ };
+
+ 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>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1416000000 {
+ opp-hz = /bits/ 64 <1416000000>;
+ opp-microvolt = <725000 725000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1608000000 {
+ opp-hz = /bits/ 64 <1608000000>;
+ opp-microvolt = <762500 762500 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <850000 850000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2016000000 {
+ opp-hz = /bits/ 64 <2016000000>;
+ opp-microvolt = <925000 925000 1000000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-2208000000 {
+ opp-hz = /bits/ 64 <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>;
+ clock-latency-ns = <40000>;
+ };

Same comment

+ };
+
firmware {
optee: optee {
compatible = "linaro,optee-tz";

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Next message: Vladimir Oltean: "Re: [PATCH net-next v3 1/7] net: dsa: mt7530: always trap frames to active CPU port on MT7530"
Previous message: Mirsad Todorovac: "Re: BUG [RESEND][NEW BUG]: kernel NULL pointer dereference, address: 0000000000000008"
In reply to: Alexey Charkov: "[PATCH 4/4] arm64: dts: rockchip: Add OPP data for CPU cores on RK3588"
Next in thread: Alexey Charkov: "Re: [PATCH 4/4] arm64: dts: rockchip: Add OPP data for CPU cores on RK3588"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]