linux-kernel - Re: [PATCH 3/2] arm64: dts: qcom: sc7180: Remove ipa interconnect node

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Date:   Fri, 22 Apr 2022 10:01:24 +0300
From:   Georgi Djakov <djakov@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>
Cc:     linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        Doug Anderson <dianders@...omium.org>,
        Alex Elder <elder@...aro.org>,
        Taniya Das <quic_tdas@...cinc.com>,
        Mike Tipton <quic_mdtipton@...cinc.com>
Subject: Re: [PATCH 3/2] arm64: dts: qcom: sc7180: Remove ipa interconnect
 node

On 20.04.22 5:56, Bjorn Andersson wrote:
> On Thu 14 Apr 17:58 PDT 2022, Stephen Boyd wrote:
> 
>> This device node is unused now that we've removed the driver that
>> consumed it in the kernel. Drop the unused node to save some space.
>>
> 
> I'm expecting that merging patch 3 and 4 will work, but cause sync_state
> to not happen until the driver changes are merged.
> 
> Can you confirm my expectation? And perhaps confirm that it's fine for
> Georgi to pick the driver changes independently of the dts changes...

I have picked the driver changes, as the boot failure definitely needs to
be addressed. The sync-state might not happen until we have the DT changes
merged, as the framework is matching the count of probed drivers with the
count of providers in DT.

>> Cc: Alex Elder <elder@...aro.org>
>> Cc: Taniya Das <quic_tdas@...cinc.com>
>> Cc: Mike Tipton <quic_mdtipton@...cinc.com>
>> Cc: Georgi Djakov <djakov@...nel.org>
>> Signed-off-by: Stephen Boyd <swboyd@...omium.org>

Acked-by: Georgi Djakov <djakov@...nel.org>

Thanks,
Georgi

>> ---
>>   arch/arm64/boot/dts/qcom/sc7180.dtsi | 7 -------
>>   1 file changed, 7 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
>> index e1c46b80f14a..1ff96ef30e3f 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
>> @@ -1421,13 +1421,6 @@ mmss_noc: interconnect@...0000 {
>>   			qcom,bcm-voters = <&apps_bcm_voter>;
>>   		};
>>   
>> -		ipa_virt: interconnect@...0000 {
>> -			compatible = "qcom,sc7180-ipa-virt";
>> -			reg = <0 0x01e00000 0 0x1000>;
>> -			#interconnect-cells = <2>;
>> -			qcom,bcm-voters = <&apps_bcm_voter>;
>> -		};
>> -
>>   		ipa: ipa@...0000 {
>>   			compatible = "qcom,sc7180-ipa";
>>   
>> -- 
>> https://chromeos.dev
>>