linux-kernel - Re: [PATCH v4 1/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai link for I2S driver

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Date:   Fri, 12 Mar 2021 18:32:20 +0530
From:   Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     gross@...nel.org, Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Rohit kumar <rohitkr@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Judy Hsiao <judyhsiao@...omium.org>,
        Ajit Pandey <ajitp@...eaurora.org>,
        V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v4 1/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai
 link for I2S driver

Hi Doug,

Thanks for your time!!!

On 3/12/2021 1:26 AM, Doug Anderson wrote:
> Hi,
>
> On Thu, Mar 11, 2021 at 8:49 AM Srinivasa Rao Mandadapu
> <srivasam@...eaurora.org> wrote:
>> From: Ajit Pandey <ajitp@...eaurora.org>
>>
>> Add dai link for supporting lpass I2S driver, which is used
>> for audio capture and playback.
>> Add lpass-cpu node with  pin controls and i2s primary
>> and secondary dai-links
>>
>> Signed-off-by: Ajit Pandey <ajitp@...eaurora.org>
>> Signed-off-by: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
>> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
>> ---
>>   arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 58 ++++++++++++++++++++
>>   1 file changed, 58 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> index 436582279dad..501e3d4c9097 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> @@ -9,6 +9,7 @@
>>   #include <dt-bindings/input/gpio-keys.h>
>>   #include <dt-bindings/input/input.h>
>>   #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>> +#include <dt-bindings/sound/qcom,lpass.h>
> It seems marginally better to include "sc7180-lpass.h" to get this? I
> don't really know the difference between the two but since unless
> we're planning to delete the sc7180 version it seems like you might as
> well include that one?

Yes, I agree.

Recently, all Quallcomm variant headers are combined and created 
"qcom,lpass.h".

"sc7180-lpass.h" still includes "qcom,lpass.h". So I will change and 
repost the patch.


Here is the reference commit:

>
>
>>   /* PMICs depend on spmi_bus label and so must come after SoC */
>>   #include "pm6150.dtsi"
>> @@ -283,6 +284,42 @@ keyboard_backlight: keyboard-backlight {
>>                          max-brightness = <1023>;
>>                  };
>>          };
>> +
>> +       sound: sound {
>> +               compatible = "google,sc7180-trogdor";
>> +               model = "sc7180-rt5682-max98357a-1mic";
>> +
>> +               audio-routing =
>> +                       "Headphone Jack", "HPOL",
>> +                       "Headphone Jack", "HPOR";
>> +
>> +               #address-cells = <1>;
>> +               #size-cells = <0>;
>> +
>> +               dai-link@0 {
>> +                       link-name = "MultiMedia0";
>> +                       reg = <MI2S_PRIMARY>;
>> +                       cpu {
>> +                               sound-dai = <&lpass_cpu MI2S_PRIMARY>;
>> +                       };
>> +
>> +                       codec {
>> +                               sound-dai = <&alc5682 MI2S_PRIMARY>;
> I'm an audio noob but isn't "MI2S_PRIMARY" something to be used with
> "lpass_cpu", not with "alc5682" ?
>
> I have no idea what the IDs correspond to on "alc5682". Are you sure
> we even need an extra ID there? The "alc5682" bindings upstream don't
> talk anything about dai-cells, but maybe they're just wrong...
Yes. I will change and re-post.
>
> -Doug

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