From: Leo Yan <leo.yan@linaro.org> To: Wei Xu <xuwei5@hisilicon.com>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org>, Kevin Wang <jean.wangtao@linaro.org>, Vincent Guittot <vincent.guittot@linaro.org> Subject: Re: [PATCH] arm64: dts: Hi3660: Remove 'CPU_NAP' idle state Date: Wed, 28 Feb 2018 13:08:04 +0800 [thread overview] Message-ID: <20180228050803.GB20745@leoy-ThinkPad-T440> (raw) In-Reply-To: <1515472362-19979-1-git-send-email-leo.yan@linaro.org> Hi Wei, On Tue, Jan 09, 2018 at 12:32:42PM +0800, Leo Yan wrote: > Thanks a lot for Vincent Guittot careful work to find bug for 'CPU_NAP' > idle state. At early time, the CPU CA73 CPU_NAP idle state has been > supported on Hikey960. Later we found the system has the hang issue > and for resolving this issue Hisilicon released new MCU firmware, but > unfortunately the new MCU firmware has side effect and results in the > CA73 CPU cannot really enter CPU_NAP state and roll back to WFI state. > > After discussion we cannot see the possibility to enable CA73 CPU_NAP > state anymore on Hikey960, based on this conclusion we should remove > this state from DT binding. > > Cc: Daniel Lezcano <daniel.lezcano@linaro.org> > Cc: Kevin Wang <jean.wangtao@linaro.org> > Cc: Vincent Guittot <vincent.guittot@linaro.org> > Signed-off-by: Leo Yan <leo.yan@linaro.org> Could you help to pick up this patch? Thanks! > --- > arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 32 ++++--------------------------- > 1 file changed, 4 insertions(+), 28 deletions(-) > > diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > index ab0b95b..8fddf0d 100644 > --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > @@ -96,11 +96,7 @@ > reg = <0x0 0x100>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu5: cpu@101 { > @@ -109,11 +105,7 @@ > reg = <0x0 0x101>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu6: cpu@102 { > @@ -122,11 +114,7 @@ > reg = <0x0 0x102>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu7: cpu@103 { > @@ -135,24 +123,12 @@ > reg = <0x0 0x103>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > idle-states { > entry-method = "psci"; > > - CPU_NAP: cpu-nap { > - compatible = "arm,idle-state"; > - arm,psci-suspend-param = <0x0000001>; > - entry-latency-us = <7>; > - exit-latency-us = <2>; > - min-residency-us = <15>; > - }; > - > CPU_SLEEP: cpu-sleep { > compatible = "arm,idle-state"; > local-timer-stop; > -- > 2.7.4 >
WARNING: multiple messages have this Message-ID (diff)
From: leo.yan@linaro.org (Leo Yan) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] arm64: dts: Hi3660: Remove 'CPU_NAP' idle state Date: Wed, 28 Feb 2018 13:08:04 +0800 [thread overview] Message-ID: <20180228050803.GB20745@leoy-ThinkPad-T440> (raw) In-Reply-To: <1515472362-19979-1-git-send-email-leo.yan@linaro.org> Hi Wei, On Tue, Jan 09, 2018 at 12:32:42PM +0800, Leo Yan wrote: > Thanks a lot for Vincent Guittot careful work to find bug for 'CPU_NAP' > idle state. At early time, the CPU CA73 CPU_NAP idle state has been > supported on Hikey960. Later we found the system has the hang issue > and for resolving this issue Hisilicon released new MCU firmware, but > unfortunately the new MCU firmware has side effect and results in the > CA73 CPU cannot really enter CPU_NAP state and roll back to WFI state. > > After discussion we cannot see the possibility to enable CA73 CPU_NAP > state anymore on Hikey960, based on this conclusion we should remove > this state from DT binding. > > Cc: Daniel Lezcano <daniel.lezcano@linaro.org> > Cc: Kevin Wang <jean.wangtao@linaro.org> > Cc: Vincent Guittot <vincent.guittot@linaro.org> > Signed-off-by: Leo Yan <leo.yan@linaro.org> Could you help to pick up this patch? Thanks! > --- > arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 32 ++++--------------------------- > 1 file changed, 4 insertions(+), 28 deletions(-) > > diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > index ab0b95b..8fddf0d 100644 > --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi > @@ -96,11 +96,7 @@ > reg = <0x0 0x100>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu5: cpu at 101 { > @@ -109,11 +105,7 @@ > reg = <0x0 0x101>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu6: cpu at 102 { > @@ -122,11 +114,7 @@ > reg = <0x0 0x102>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > cpu7: cpu at 103 { > @@ -135,24 +123,12 @@ > reg = <0x0 0x103>; > enable-method = "psci"; > next-level-cache = <&A73_L2>; > - cpu-idle-states = < > - &CPU_NAP > - &CPU_SLEEP > - &CLUSTER_SLEEP_1 > - >; > + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; > }; > > idle-states { > entry-method = "psci"; > > - CPU_NAP: cpu-nap { > - compatible = "arm,idle-state"; > - arm,psci-suspend-param = <0x0000001>; > - entry-latency-us = <7>; > - exit-latency-us = <2>; > - min-residency-us = <15>; > - }; > - > CPU_SLEEP: cpu-sleep { > compatible = "arm,idle-state"; > local-timer-stop; > -- > 2.7.4 >
next prev parent reply other threads:[~2018-02-28 5:08 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-01-09 4:32 [PATCH] arm64: dts: Hi3660: Remove 'CPU_NAP' idle state Leo Yan 2018-01-09 4:32 ` Leo Yan 2018-01-09 4:32 ` Leo Yan 2018-01-10 8:38 ` Vincent Guittot 2018-01-10 8:38 ` Vincent Guittot 2018-01-10 8:38 ` Vincent Guittot 2018-02-28 5:08 ` Leo Yan [this message] 2018-02-28 5:08 ` Leo Yan 2018-03-02 15:57 ` Wei Xu 2018-03-02 15:57 ` Wei Xu 2018-03-02 15:57 ` Wei Xu
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