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Date:   Fri, 20 Jan 2023 08:42:08 +0100
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Subject: Re: [RFT PATCH v2 4/6] arm64: dts: qcom: sdm845: move audio to
 separate file
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To:     Caleb Connolly <caleb.connolly@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
References: <20230118103458.107434-1-krzysztof.kozlowski@linaro.org>
 <20230118103458.107434-4-krzysztof.kozlowski@linaro.org>
 <46acf2f4-3272-c33d-887f-05d4f4aad4d7@linaro.org>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <46acf2f4-3272-c33d-887f-05d4f4aad4d7@linaro.org>
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On 20/01/2023 00:24, Caleb Connolly wrote:
> 
> 
> On 18/01/2023 10:34, Krzysztof Kozlowski wrote:
>> Re-organize SDM845 sound components into separate, audio DTSI which
>> should be included and customized by the SDM845 boards wanting audio.
>> The DTSI includes:
>> 1. WCD9340 codec node because it is not a property of the SoC, but board.
>> 2. Common sound DAI links, shared with all sound cards.
> 
> Hi Krzysztof,
> 
> I know I already reported this on IRC, I thought I'd duplicate the info
> here for completeness sake.
> 
> Due to how the sound node is parsed the device numbers in alsa are
> derived from the index of the sound/mmX-dai-link child nodes.
> 
> For boards which use more than 3 FE's this causes breaking changes in
> userspace, as the slim-dai-link and slimcap-dai-link nodes now come
> before the other mmX-dai-link nodes, for example with my OnePlus 6
> patches "aplay -l" shows:
> 
> card 0: O6 [OnePlus 6], device 0: MultiMedia1 (*) []
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: O6 [OnePlus 6], device 1: MultiMedia2 (*) []
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: O6 [OnePlus 6], device 2: MultiMedia3 (*) []
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: O6 [OnePlus 6], device 5: MultiMedia4 (*) [] <-- 5 instead of 3
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: O6 [OnePlus 6], device 6: MultiMedia5 (*) []
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: O6 [OnePlus 6], device 7: MultiMedia6 (*) []
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> 
> This breaks the UCM configs shipped by postmarketOS and Mobian - though
> none of it is "upstream".

Thanks for the report.


> 
> Would it be reasonable to add all 6 FE DAI's and then disable the unused
> ones on a per-board basis?


Or just drop the sound node from the audio DTSI, not sure if there are
benefits in such case...

> 
>>
>> The Xiaomi Polaris, although includes WCD9340 codec, it lacks sound
>> node, so it stays disabled.
>>
>> On all others boards not using audio, keep the Slimbus node disabled as
>> it is empty.

Please trim your replies - there is a lot of unrelated content here and
I don't know if I should keep scrolling to look for something or not.

Best regards,
Krzysztof