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Subject: Re: [PATCH v2 17/17] arm64: dts: sdm845: add IPA information
To:     Jon Hunter <jonathanh@nvidia.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Andy Gross <agross@kernel.org>,
        David Miller <davem@davemloft.net>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Johannes Berg <johannes@sipsolutions.net>,
        Dan Williams <dcbw@redhat.com>,
        Evan Green <evgreen@google.com>,
        Eric Caruso <ejcaruso@google.com>,
        Susheel Yadav Yadagiri <syadagir@codeaurora.org>,
        Chaitanya Pratapa <cpratapa@codeaurora.org>,
        Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Ohad Ben-Cohen <ohad@wizery.com>,
        Siddharth Gupta <sidgup@codeaurora.org>,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20200306042831.17827-1-elder@linaro.org>
 <20200306042831.17827-18-elder@linaro.org>
 <ec9776b3-ac79-8f9d-8c4d-012d62dc8f72@nvidia.com>
From:   Alex Elder <elder@linaro.org>
Message-ID: <4decbc8a-b0a6-8f10-b439-ade9008a4cff@linaro.org>
Date:   Wed, 11 Mar 2020 09:39:25 -0500
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On 3/11/20 5:49 AM, Jon Hunter wrote:
> 
> On 06/03/2020 04:28, Alex Elder wrote:
>> Add IPA-related nodes and definitions to "sdm845.dtsi".
>>
>> Signed-off-by: Alex Elder <elder@linaro.org>
>> ---
>>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 51 ++++++++++++++++++++++++++++
>>  1 file changed, 51 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> index d42302b8889b..58fd1c611849 100644
>> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> @@ -675,6 +675,17 @@
>>  			interrupt-controller;
>>  			#interrupt-cells = <2>;
>>  		};
>> +
>> +		ipa_smp2p_out: ipa-ap-to-modem {
>> +			qcom,entry-name = "ipa";
>> +			#qcom,smem-state-cells = <1>;
>> +		};
>> +
>> +		ipa_smp2p_in: ipa-modem-to-ap {
>> +			qcom,entry-name = "ipa";
>> +			interrupt-controller;
>> +			#interrupt-cells = <2>;
>> +		};
>>  	};
>>  
>>  	smp2p-slpi {
>> @@ -1435,6 +1446,46 @@
>>  			};
>>  		};
>>  
>> +		ipa@1e40000 {
>> +			compatible = "qcom,sdm845-ipa";
>> +
>> +			modem-init;
>> +			modem-remoteproc = <&mss_pil>;
>> +
>> +			reg = <0 0x1e40000 0 0x7000>,
>> +			      <0 0x1e47000 0 0x2000>,
>> +			      <0 0x1e04000 0 0x2c000>;
>> +			reg-names = "ipa-reg",
>> +				    "ipa-shared",
>> +				    "gsi";
>> +
>> +			interrupts-extended =
>> +					<&intc 0 311 IRQ_TYPE_EDGE_RISING>,
>> +					<&intc 0 432 IRQ_TYPE_LEVEL_HIGH>,
>> +					<&ipa_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
>> +					<&ipa_smp2p_in 1 IRQ_TYPE_EDGE_RISING>;
>> +			interrupt-names = "ipa",
>> +					  "gsi",
>> +					  "ipa-clock-query",
>> +					  "ipa-setup-ready";
>> +
>> +			clocks = <&rpmhcc RPMH_IPA_CLK>;
>> +			clock-names = "core";
>> +
>> +			interconnects =
>> +				<&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_EBI1>,
>> +				<&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_IMEM>,
>> +				<&rsc_hlos MASTER_APPSS_PROC &rsc_hlos SLAVE_IPA_CFG>;
>> +			interconnect-names = "memory",
>> +					     "imem",
>> +					     "config";
>> +
>> +			qcom,smem-states = <&ipa_smp2p_out 0>,
>> +					   <&ipa_smp2p_out 1>;
>> +			qcom,smem-state-names = "ipa-clock-enabled-valid",
>> +						"ipa-clock-enabled";
>> +		};
>> +
>>  		tcsr_mutex_regs: syscon@1f40000 {
>>  			compatible = "syscon";
>>  			reg = <0 0x01f40000 0 0x40000>;
>>
> 
> 
> This change is causing the following build error on today's -next ...
> 
>  DTC     arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dtb
>  arch/arm64/boot/dts/qcom/sdm845.dtsi:1710.15-1748.5: ERROR (phandle_references): /soc@0/ipa@1e40000: Reference to non-existent node or label "rsc_hlos"

This problem arises because a commit in the Qualcomm SoC tree affects
"arch/arm64/boot/dts/qcom/sdm845.dtsi", changing the interconnect provider
node(s) used by IPA:
  b303f9f0050b arm64: dts: sdm845: Redefine interconnect provider DT nodes

I will send out a patch today that updates the IPA node in "sdm845.dtsi"
to correct that.

In the mean time, David, perhaps you should revert this change in net-next:
  9cc5ae125f0e arm64: dts: sdm845: add IPA information
and let me work out fixing "sdm845.dtsi" with Andy and Bjorn in the
Qualcomm tree.

Thanks.

				-Alex

> Cheers
> Jon
>