Re: [PATCH v3] ARM: exynos: Set MCPM as mandatory for Exynos542x/5800 SoCs

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Hi Olof and Krzysztof,

On 2019-04-08 19:56, Olof Johansson wrote:
> On Wed, Mar 20, 2019 at 11:32 PM Marek Szyprowski
> <m.szyprowski@xxxxxxxxxxx> wrote:
>> Support for Exynos5420/5422/5800 SoCs requires MCPM to properly boot all
>> CPU cores on all currectly supported platforms: Peach Pit (Exynos5420),
>> Odroid XU3/XU3lite/XU4/HC1 (Exynos5422) and Peach Pi (Exynos5800).
>> Without it some CPU cores fail to come online. Remove then the ability to
>> disable MCPM and make it mandatory when Exynos542x/5800 support is
>> enabled.
>>
>> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
>> ---
>> v3: remove CONFIG_EXYNOS5420_MCPM symbol from defconfigs too
>> v2: rebased on top of the current exynos-next
>> ---
>>   arch/arm/configs/exynos_defconfig   |  1 -
>>   arch/arm/configs/multi_v7_defconfig |  1 -
>>   arch/arm/mach-exynos/Kconfig        | 12 +++---------
>>   arch/arm/mach-exynos/Makefile       |  2 +-
>>   arch/arm/mach-exynos/suspend.c      | 12 ++++--------
>>   5 files changed, 8 insertions(+), 20 deletions(-)
>>
>> diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
>> index d635edfb6ff2..c95c54284da2 100644
>> --- a/arch/arm/configs/exynos_defconfig
>> +++ b/arch/arm/configs/exynos_defconfig
>> @@ -9,7 +9,6 @@ CONFIG_MODULE_UNLOAD=y
>>   CONFIG_PARTITION_ADVANCED=y
>>   CONFIG_ARCH_EXYNOS=y
>>   CONFIG_ARCH_EXYNOS3=y
>> -CONFIG_EXYNOS5420_MCPM=y
>>   CONFIG_SMP=y
>>   CONFIG_BIG_LITTLE=y
>>   CONFIG_NR_CPUS=8
>> diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
>> index c75051b9392c..e4b5fd46fdef 100644
>> --- a/arch/arm/configs/multi_v7_defconfig
>> +++ b/arch/arm/configs/multi_v7_defconfig
>> @@ -33,7 +33,6 @@ CONFIG_MACH_BERLIN_BG2CD=y
>>   CONFIG_MACH_BERLIN_BG2Q=y
>>   CONFIG_ARCH_DIGICOLOR=y
>>   CONFIG_ARCH_EXYNOS=y
>> -CONFIG_EXYNOS5420_MCPM=y
>>   CONFIG_ARCH_HIGHBANK=y
>>   CONFIG_ARCH_HISI=y
>>   CONFIG_ARCH_HI3xxx=y
>> diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
>> index b40963cf91c7..62b734a8092b 100644
>> --- a/arch/arm/mach-exynos/Kconfig
>> +++ b/arch/arm/mach-exynos/Kconfig
>> @@ -106,21 +106,15 @@ config SOC_EXYNOS5420
>>          bool "SAMSUNG EXYNOS5420"
>>          default y
>>          depends on ARCH_EXYNOS5
>> +       select MCPM
>> +       select ARM_CCI400_PORT_CTRL
>> +       select ARM_CPU_SUSPEND
> This breaks !SMP builds now:
>
> http://arm-soc.lixom.net/buildlogs/next/next-20190408/buildall.arm.multi_v7_nosmp_defconfig.log.failed

Thanks for spotting this issue.

> Please use "select MCPM if SMP" instead.

Krzysztof: if possible please drop this patch and I will send v4 with 
this issue fixed. Fixing is almost equivalent to a revert, so there is 
no point in making an incremental patch.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland




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