Re: [PATCH v2 8/8] arm64: defconfig: enable interconnect and pinctrl for SM4450

[Georgi Djakov]

Hi Trilok,

On 16.09.23 5:25, Trilok Soni wrote:
> On 9/15/2023 7:21 PM, Trilok Soni wrote:
> > On 9/15/2023 4:29 AM, Krzysztof Kozlowski wrote:
> > > On 15/09/2023 13:18, Tengfei Fan wrote:
> > > > 在 9/15/2023 5:16 PM, Krzysztof Kozlowski 写道:
> > > > > On 15/09/2023 11:12, Tengfei Fan wrote:
> > > > > > 在 9/15/2023 3:21 PM, Krzysztof Kozlowski 写道:
> > > > > > > On 15/09/2023 04:15, Tengfei Fan wrote:
> > > > > > > > Add the SM4450 interconnect and pinctrl drivers as built-in for
> > > > > > > > support the Qualcomm SM4450 platform to boot to uart shell.
> > > > > > > >
> > > > > > > > Signed-off-by: Tengfei Fan <quic_tengfan@xxxxxxxxxxx>
> > > > > > > > ---
> > > > > > > >     arch/arm64/configs/defconfig | 2 ++
> > > > > > > >     1 file changed, 2 insertions(+)
> > > > > > > >
> > > > > > > > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> > > > > > > > index ec59174b14db..e91993de865e 100644
> > > > > > > > --- a/arch/arm64/configs/defconfig
> > > > > > > > +++ b/arch/arm64/configs/defconfig
> > > > > > > > @@ -598,6 +598,7 @@ CONFIG_PINCTRL_SC8280XP=y
> > > > > > > >     CONFIG_PINCTRL_SDM660=y
> > > > > > > >     CONFIG_PINCTRL_SDM670=y
> > > > > > > >     CONFIG_PINCTRL_SDM845=y
> > > > > > > > +CONFIG_PINCTRL_SM4450=y
> > > > > > > >     CONFIG_PINCTRL_SM6115=y
> > > > > > > >     CONFIG_PINCTRL_SM6125=y
> > > > > > > >     CONFIG_PINCTRL_SM6350=y
> > > > > > > > @@ -1500,6 +1501,7 @@ CONFIG_INTERCONNECT_QCOM_SC7280=y
> > > > > > > >     CONFIG_INTERCONNECT_QCOM_SC8180X=y
> > > > > > > >     CONFIG_INTERCONNECT_QCOM_SC8280XP=y
> > > > > > > >     CONFIG_INTERCONNECT_QCOM_SDM845=y
> > > > > > > > +CONFIG_INTERCONNECT_QCOM_SM4450=y
> > > > > > >
> > > > > > > Why it cannot be =m?
> > > > > > >
> > > > > > > Best regards,
> > > > > > > Krzysztof
> > > > > >
> > > > > > Hi Krzysztof,
> > > > > > Because system haven't capacity of loading ko files at this time on
> > > > > > SM4450 platform, so setting to "Y".
> > > > >
> > > > > Hm? System has this capability. All systems have. What is so different
> > > > > on SM4450 comparing to everything else we have here?
> > > > >
> > > > > No, this should be =m and you need to fix your system.
> > > > >
> > > > > Best regards,
> > > > > Krzysztof
> > > > Hi Krzysztof,
> > > > Find new way which can load ko files on SM4450 platform, still need use
> > > > "Y", because of some other modules have dependence to these two config,
> > > > like scm, smmu module drivers, uart shell console cannot be got if set
> > > > to "m".
> > >
> > > That's what I am asking, which device exactly needs it.
> > >
> > > > Also do test for setting these two config to "m" on SM8450 platform, get
> > > > uart shell consle failed if so setting.
> > >
> > > Yeah, this we know, I did this. I am asking about SM4450.
> >
> > Why we have =m requirement when other drivers above are =Y?. Can we confirm
> > w/ Georgi? I am not aware that Interconnect drivers needs to be =m only.
> >
> > CONFIG_INTERCONNECT_QCOM_SC8180X=y
> > CONFIG_INTERCONNECT_QCOM_SC8280XP=y
> > CONFIG_INTERCONNECT_QCOM_SDM845=y
>
> Complete list here, and it is inconsistent. Latest 8550 is also =y. Do we document
> the reasons somewhere on why they are added as =y?
>
> CONFIG_INTERCONNECT_QCOM=y
> CONFIG_INTERCONNECT_QCOM_MSM8916=m
> CONFIG_INTERCONNECT_QCOM_MSM8996=m
> CONFIG_INTERCONNECT_QCOM_OSM_L3=m
> CONFIG_INTERCONNECT_QCOM_QCM2290=m
> CONFIG_INTERCONNECT_QCOM_QCS404=m
> CONFIG_INTERCONNECT_QCOM_SA8775P=y
> CONFIG_INTERCONNECT_QCOM_SC7180=y
> CONFIG_INTERCONNECT_QCOM_SC7280=y
> CONFIG_INTERCONNECT_QCOM_SC8180X=y
> CONFIG_INTERCONNECT_QCOM_SC8280XP=y
> CONFIG_INTERCONNECT_QCOM_SDM845=y
> CONFIG_INTERCONNECT_QCOM_SM8150=m
> CONFIG_INTERCONNECT_QCOM_SM8250=m
> CONFIG_INTERCONNECT_QCOM_SM8350=m
> CONFIG_INTERCONNECT_QCOM_SM8450=y
> CONFIG_INTERCONNECT_QCOM_SM8550=y

If the device can boot (to console/initramfs) with =m, we go with that.
But if something critical like the UART depends on the interconnect
provider, then we make it built-in.

On SM8550 for example, we have enabled bandwidth scaling support for QUP
and that's why it needs to be =y.

It looks like on SM4450 this should be =y too.

Thanks,
Georgi