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Date: Thu, 30 Jun 2022 10:56:39 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Abel Vesa <abel.vesa@...aro.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Andy Gross <agross@...nel.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Rob Herring <robh@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845: Switch PSCI cpu idle states
from PC to OSI
On 30/06/2022 10:42, Abel Vesa wrote:
> This switches from the flat PC idle states of sdm845 to OSI hierarchical
s/This switches/Switch/
> idle states. The exceptions are the cheza plaftorms, which need to remain
> with PC idle states. So in order allow all the other platforms to switch,
> while cheza platforms to remain the same, replace the PC idle states with
> the OSI ones in the main SDM845 dtsi, and then override the inherited OSI
> states with PC ones, delete inherited psci cpus nodes, domain idle states
> and power domain properties.
>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>
> In order to maintain bisectability, I kept everything in one patch.
>
> arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 132 ++++++++++++++++++++
> arch/arm64/boot/dts/qcom/sdm845.dtsi | 136 +++++++++++++--------
> 2 files changed, 214 insertions(+), 54 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> index e7e4cc5936aa..8640748fc53c 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> @@ -145,6 +145,138 @@ panel_in_edp: endpoint {
> };
> };
>
> +&psci {
> + /delete-node/ cpu0;
> + /delete-node/ cpu1;
> + /delete-node/ cpu2;
> + /delete-node/ cpu3;
> + /delete-node/ cpu4;
> + /delete-node/ cpu5;
> + /delete-node/ cpu6;
> + /delete-node/ cpu7;
> + /delete-node/ cpu-cluster0;
> +};
> +
> +&cpus {
> + /delete-node/ domain-idle-states;
> +};
> +
> +&cpu_idle_states {
> + LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
Wrong indentation.
> + compatible = "arm,idle-state";
> + idle-state-name = "little-power-down";
> + arm,psci-suspend-param = <0x40000003>;
> + entry-latency-us = <350>;
> + exit-latency-us = <461>;
> + min-residency-us = <1890>;
> + local-timer-stop;
> + };
> +
> + LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
> + compatible = "arm,idle-state";
> + idle-state-name = "little-rail-power-down";
> + arm,psci-suspend-param = <0x40000004>;
> + entry-latency-us = <360>;
> + exit-latency-us = <531>;
> + min-residency-us = <3934>;
> + local-timer-stop;
> + };
> +
> + BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "big-power-down";
> + arm,psci-suspend-param = <0x40000003>;
> + entry-latency-us = <264>;
> + exit-latency-us = <621>;
> + min-residency-us = <952>;
> + local-timer-stop;
> + };
> +
> + BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
> + compatible = "arm,idle-state";
> + idle-state-name = "big-rail-power-down";
> + arm,psci-suspend-param = <0x40000004>;
> + entry-latency-us = <702>;
> + exit-latency-us = <1061>;
> + min-residency-us = <4488>;
> + local-timer-stop;
> + };
> +
> + CLUSTER_SLEEP_0: cluster-sleep-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "cluster-power-down";
> + arm,psci-suspend-param = <0x400000F4>;
> + entry-latency-us = <3263>;
> + exit-latency-us = <6562>;
> + min-residency-us = <9987>;
> + local-timer-stop;
> + };
> +};
> +
> +&CPU0 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU1 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU2 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU3 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU4 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU5 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU6 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> +&CPU7 {
> + /delete-property/ power-domains;
> + /delete-property/ power-domain-names;
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> +};
> +
> /*
> * Reserved memory changes
> *
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 83439739de37..6bb027d2ab58 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -188,7 +188,7 @@ spss_mem: spss@...00000 {
> };
> };
>
> - cpus {
> + cpus: cpus {
> #address-cells = <2>;
> #size-cells = <0>;
>
> @@ -197,15 +197,14 @@ CPU0: cpu@0 {
> compatible = "qcom,kryo385";
> reg = <0x0 0x0>;
> enable-method = "psci";
> - cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> - &LITTLE_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> capacity-dmips-mhz = <611>;
> dynamic-power-coefficient = <290>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> operating-points-v2 = <&cpu0_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD0>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_0>;
> L2_0: l2-cache {
> @@ -222,15 +221,14 @@ CPU1: cpu@100 {
> compatible = "qcom,kryo385";
> reg = <0x0 0x100>;
> enable-method = "psci";
> - cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> - &LITTLE_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> capacity-dmips-mhz = <611>;
> dynamic-power-coefficient = <290>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> operating-points-v2 = <&cpu0_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD1>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_100>;
> L2_100: l2-cache {
> @@ -244,15 +242,14 @@ CPU2: cpu@200 {
> compatible = "qcom,kryo385";
> reg = <0x0 0x200>;
> enable-method = "psci";
> - cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> - &LITTLE_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> capacity-dmips-mhz = <611>;
> dynamic-power-coefficient = <290>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> operating-points-v2 = <&cpu0_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD2>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_200>;
> L2_200: l2-cache {
> @@ -266,9 +263,6 @@ CPU3: cpu@300 {
> compatible = "qcom,kryo385";
> reg = <0x0 0x300>;
> enable-method = "psci";
> - cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> - &LITTLE_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> capacity-dmips-mhz = <611>;
> dynamic-power-coefficient = <290>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -276,6 +270,8 @@ &LITTLE_CPU_SLEEP_1
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> #cooling-cells = <2>;
> + power-domains = <&CPU_PD3>;
> + power-domain-names = "psci";
> next-level-cache = <&L2_300>;
> L2_300: l2-cache {
> compatible = "cache";
> @@ -289,14 +285,13 @@ CPU4: cpu@400 {
> reg = <0x0 0x400>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> - cpu-idle-states = <&BIG_CPU_SLEEP_0
> - &BIG_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> dynamic-power-coefficient = <442>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> operating-points-v2 = <&cpu4_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD4>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_400>;
> L2_400: l2-cache {
> @@ -311,14 +306,13 @@ CPU5: cpu@500 {
> reg = <0x0 0x500>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> - cpu-idle-states = <&BIG_CPU_SLEEP_0
> - &BIG_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> dynamic-power-coefficient = <442>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> operating-points-v2 = <&cpu4_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD5>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_500>;
> L2_500: l2-cache {
> @@ -333,14 +327,13 @@ CPU6: cpu@600 {
> reg = <0x0 0x600>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> - cpu-idle-states = <&BIG_CPU_SLEEP_0
> - &BIG_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> dynamic-power-coefficient = <442>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> operating-points-v2 = <&cpu4_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD6>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_600>;
> L2_600: l2-cache {
> @@ -355,14 +348,13 @@ CPU7: cpu@700 {
> reg = <0x0 0x700>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> - cpu-idle-states = <&BIG_CPU_SLEEP_0
> - &BIG_CPU_SLEEP_1
> - &CLUSTER_SLEEP_0>;
> dynamic-power-coefficient = <442>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> operating-points-v2 = <&cpu4_opp_table>;
> interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_EBI1 3>,
> <&osm_l3 MASTER_OSM_L3_APPS &osm_l3 SLAVE_OSM_L3>;
> + power-domains = <&CPU_PD7>;
> + power-domain-names = "psci";
> #cooling-cells = <2>;
> next-level-cache = <&L2_700>;
> L2_700: l2-cache {
> @@ -407,53 +399,35 @@ core7 {
> };
> };
>
> - idle-states {
> + cpu_idle_states: idle-states {
> entry-method = "psci";
>
> LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
> compatible = "arm,idle-state";
> - idle-state-name = "little-power-down";
> - arm,psci-suspend-param = <0x40000003>;
> + idle-state-name = "little-rail-power-collapse";
> + arm,psci-suspend-param = <0x40000004>;
> entry-latency-us = <350>;
> exit-latency-us = <461>;
> min-residency-us = <1890>;
> local-timer-stop;
> };
>
> - LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
> - compatible = "arm,idle-state";
> - idle-state-name = "little-rail-power-down";
> - arm,psci-suspend-param = <0x40000004>;
> - entry-latency-us = <360>;
> - exit-latency-us = <531>;
> - min-residency-us = <3934>;
> - local-timer-stop;
> - };
> -
> BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
> compatible = "arm,idle-state";
> - idle-state-name = "big-power-down";
> - arm,psci-suspend-param = <0x40000003>;
> + idle-state-name = "big-rail-power-collapse";
> + arm,psci-suspend-param = <0x40000004>;
> entry-latency-us = <264>;
> exit-latency-us = <621>;
> min-residency-us = <952>;
> local-timer-stop;
> };
> + };
>
> - BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
> - compatible = "arm,idle-state";
> - idle-state-name = "big-rail-power-down";
> - arm,psci-suspend-param = <0x40000004>;
> - entry-latency-us = <702>;
> - exit-latency-us = <1061>;
> - min-residency-us = <4488>;
> - local-timer-stop;
> - };
> -
> + domain-idle-states {
> CLUSTER_SLEEP_0: cluster-sleep-0 {
> - compatible = "arm,idle-state";
> - idle-state-name = "cluster-power-down";
> - arm,psci-suspend-param = <0x400000F4>;
> + compatible = "domain-idle-state";
> + idle-state-name = "cluster-power-collapse";
> + arm,psci-suspend-param = <0x4100c244>;
> entry-latency-us = <3263>;
> exit-latency-us = <6562>;
> min-residency-us = <9987>;
> @@ -1050,9 +1024,63 @@ slpi_smp2p_in: slave-kernel {
> };
> };
>
> - psci {
> + psci: psci {
> compatible = "arm,psci-1.0";
> method = "smc";
> +
> + CPU_PD0: cpu0 {
Node name: power-domain-cpu0
You can test it with dtbs_check for power-domain.yaml
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&LITTLE_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD1: cpu1 {
Ditto and so on.
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&LITTLE_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD2: cpu2 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&LITTLE_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD3: cpu3 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&LITTLE_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD4: cpu4 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&BIG_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD5: cpu5 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&BIG_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD6: cpu6 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&BIG_CPU_SLEEP_0>;
> + };
> +
> + CPU_PD7: cpu7 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&BIG_CPU_SLEEP_0>;
> + };
> +
> + CLUSTER_PD: cpu-cluster0 {
I guess here (you have only one cluster):
power-domain-cluster
> + #power-domain-cells = <0>;
> + domain-idle-states = <&CLUSTER_SLEEP_0>;
> + };
> +
No need for blank line.
> };
>
> soc: soc@0 {
> --
> 2.34.3
>
Best regards,
Krzysztof
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