linux-kernel - Re: [PATCH] arm64: dts: meson-sm1: add spdifin spdifout nodes

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Date:   Mon, 6 Sep 2021 14:28:38 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Art Nikpal <email2tema@...il.com>,
        Jerome Brunet <jbrunet@...libre.com>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Christian Hewitt <christianshewitt@...il.com>,
        Artem Lapkin <art@...das.com>, Nick Xie <nick@...das.com>,
        Gouwa Wang <gouwa@...das.com>
Subject: Re: [PATCH] arm64: dts: meson-sm1: add spdifin spdifout nodes

On 06/09/2021 13:56, Art Nikpal wrote:
>> It would be nice to indicate how it was tested ?
> 
> https://github.com/khadas/khadas-linux-kernel/blob/master/patches/linux-5.14-rc5.sound/0001-arm64-dts-meson-khadas-vim3-remake-simple-sound-for-.patch
> 
> i have test it
> 
> i2s  and spdif output from gpio headers - works well
> 
> On Mon, Sep 6, 2021 at 5:29 PM Jerome Brunet <jbrunet@...libre.com> wrote:
>>
>>
>> On Thu 02 Sep 2021 at 15:31, Neil Armstrong <narmstrong@...libre.com> wrote:
>>
>>> Hi,
>>>
>>> On 11/08/2021 07:09, Artem Lapkin wrote:
>>>> Add spdifin spdifout spdifout_b nodes for Amlogic SM1 SoCs.
>>>>
>>>> Signed-off-by: Artem Lapkin <art@...das.com>
>>>> ---
>>>>  arch/arm64/boot/dts/amlogic/meson-sm1.dtsi | 40 ++++++++++++++++++++++
>>>>  1 file changed, 40 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
>>>> index 3d8b1f4f2..1efdbb61e 100644
>>>> --- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
>>>> +++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
>>>> @@ -356,6 +356,33 @@ tdmin_lb: audio-controller@3c0 {
>>>>                      status = "disabled";
>>>>              };
>>>>
>>>> +            spdifin: audio-controller@400 {
>>>> +                    compatible = "amlogic,g12a-spdifin",
>>>> +                    "amlogic,axg-spdifin";
>>>> +                    reg = <0x0 0x400 0x0 0x30>;
>>>> +                    #sound-dai-cells = <0>;
>>>> +                    sound-name-prefix = "SPDIFIN";
>>>> +                    interrupts = <GIC_SPI 151 IRQ_TYPE_EDGE_RISING>;
>>>> +                    clocks = <&clkc_audio AUD_CLKID_SPDIFIN>,
>>>> +                    <&clkc_audio AUD_CLKID_SPDIFIN_CLK>;
>>>> +                    clock-names = "pclk", "refclk";
>>>> +                    resets = <&clkc_audio AUD_RESET_SPDIFIN>;
>>>> +                    status = "disabled";
>>>> +            };
>>>> +
>>>> +            spdifout: audio-controller@480 {
>>>> +                    compatible = "amlogic,g12a-spdifout",
>>>> +                    "amlogic,axg-spdifout";
>>>> +                    reg = <0x0 0x480 0x0 0x50>;
>>>> +                    #sound-dai-cells = <0>;
>>>> +                    sound-name-prefix = "SPDIFOUT";
>>>> +                    clocks = <&clkc_audio AUD_CLKID_SPDIFOUT>,
>>>> +                    <&clkc_audio AUD_CLKID_SPDIFOUT_CLK>;
>>>> +                    clock-names = "pclk", "mclk";
>>>> +                    resets = <&clkc_audio AUD_RESET_SPDIFOUT>;
>>>> +                    status = "disabled";
>>>> +            };
>>>> +
>>>>              tdmout_a: audio-controller@500 {
>>>>                      compatible = "amlogic,sm1-tdmout";
>>>>                      reg = <0x0 0x500 0x0 0x40>;
>>>> @@ -401,6 +428,19 @@ tdmout_c: audio-controller@580 {
>>>>                      status = "disabled";
>>>>              };
>>>>
>>>> +            spdifout_b: audio-controller@680 {
>>>> +                    compatible = "amlogic,g12a-spdifout",
>>>> +                    "amlogic,axg-spdifout";
>>>> +                    reg = <0x0 0x680 0x0 0x50>;
>>>> +                    #sound-dai-cells = <0>;
>>>> +                    sound-name-prefix = "SPDIFOUT_B";
>>>> +                    clocks = <&clkc_audio AUD_CLKID_SPDIFOUT_B>,
>>>> +                    <&clkc_audio AUD_CLKID_SPDIFOUT_B_CLK>;
>>>> +                    clock-names = "pclk", "mclk";
>>>> +                    resets = <&clkc_audio AUD_RESET_SPDIFOUT_B>;
>>>> +                    status = "disabled";
>>>> +            };
>>>> +
>>>>              toacodec: audio-controller@740 {
>>>>                      compatible = "amlogic,sm1-toacodec",
>>>>                                   "amlogic,g12a-toacodec";
>>>>
>>>
>>> Jerome could you quickly review this ?
>>>
>>
>> Just this, without the related card change is not usefull as it won't be
>> part of the card.
>>
>> It would be nice to indicate how it was tested ?
>>
>> AFAIK:
>> - spdifout b can only be routed to hdmi and dw-hdmi driver does not
>>   support that yet

It doesn't harm to have it described in DT, maybe one day the dw-hdmi driver will support SPDIF input.

Neil

>> - the VIM3 does not have connectors for the spdif (in or out). If it
>>   requires some extension card, it should be noted somewhere, at least
>>
>>
>>> Thanks,
>>> Neil
>>