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 <[email protected]>
Cc: Kevin Wang <[email protected]>
Cc: Vincent Guittot <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
---
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
On 9 January 2018 at 05:32, Leo Yan <[email protected]> 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 <[email protected]>
> Cc: Kevin Wang <[email protected]>
> Cc: Vincent Guittot <[email protected]>
> Signed-off-by: Leo Yan <[email protected]>
Tested-by: Vincent Guittot <[email protected]>
> ---
> 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
>
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 <[email protected]>
> Cc: Kevin Wang <[email protected]>
> Cc: Vincent Guittot <[email protected]>
> Signed-off-by: Leo Yan <[email protected]>
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
>
Hi Leo,
On 2018/2/28 5:08, Leo Yan wrote:
> 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 <[email protected]>
>> Cc: Kevin Wang <[email protected]>
>> Cc: Vincent Guittot <[email protected]>
>> Signed-off-by: Leo Yan <[email protected]>
>
> Could you help to pick up this patch? Thanks!
Applied into hisilicon dt tree.
Thanks!
Best Regards,
Wei
>
>> ---
>> 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
>>
>
> .
>