RE: [PATCH 6/6] arm64: dts: fsd: Add sound card node for Tesla FSD

Padmanabhan Rajanbabu
2022-11-08T06:19:55Z

> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@linaro.org]
> Sent: 21 October 2022 06:24 PM
> To: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>; 'Alim Akhtar'
> <alim.akhtar@samsung.com>; lgirdwood@gmail.com; broonie@kernel.org;
> robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org;
> s.nawrocki@samsung.com; perex@perex.cz; tiwai@suse.com;
> pankaj.dubey@samsung.com; rcsekar@samsung.com;
> aswani.reddy@samsung.com
> Cc: alsa-devel@alsa-project.org; devicetree@vger.kernel.org; linux-
> kernel@vger.kernel.org; linux-samsung-soc@vger.kernel.org
> Subject: Re: [PATCH 6/6] arm64: dts: fsd: Add sound card node for Tesla FSD
>
> On 21/10/2022 04:12, Padmanabhan Rajanbabu wrote:
> >
> >
> >> -----Original Message-----
> >> From: Alim Akhtar [mailto:alim.akhtar@samsung.com]
> >> Sent: 14 October 2022 06:59 PM
> >> To: 'Padmanabhan Rajanbabu' <p.rajanbabu@samsung.com>;
> >> lgirdwood@gmail.com; broonie@kernel.org; robh+dt@kernel.org;
> >> krzysztof.kozlowski+dt@linaro.org; s.nawrocki@samsung.com;
> >> perex@perex.cz; tiwai@suse.com; pankaj.dubey@samsung.com;
> >> rcsekar@samsung.com; aswani.reddy@samsung.com
> >> Cc: alsa-devel@alsa-project.org; devicetree@vger.kernel.org; linux-
> >> kernel@vger.kernel.org; linux-samsung-soc@vger.kernel.org
> >> Subject: RE: [PATCH 6/6] arm64: dts: fsd: Add sound card node for
> >> Tesla FSD
> >>
> >>
> >>
> >>> -----Original Message-----
> >>> From: Padmanabhan Rajanbabu [mailto:p.rajanbabu@samsung.com]
> >>> Sent: Friday, October 14, 2022 3:52 PM
> >>> To: lgirdwood@gmail.com; broonie@kernel.org; robh+dt@kernel.org;
> >>> krzysztof.kozlowski+dt@linaro.org; s.nawrocki@samsung.com;
> >>> perex@perex.cz; tiwai@suse.com; pankaj.dubey@samsung.com;
> >>> alim.akhtar@samsung.com; rcsekar@samsung.com;
> >> aswani.reddy@samsung.com
> >>> Cc: alsa-devel@alsa-project.org; devicetree@vger.kernel.org; linux-
> >>> kernel@vger.kernel.org; linux-samsung-soc@vger.kernel.org;
> >> Padmanabhan
> >>> Rajanbabu <p.rajanbabu@samsung.com>
> >>> Subject: [PATCH 6/6] arm64: dts: fsd: Add sound card node for Tesla
> >>> FSD
> >>>
> >>> Add device tree node support for sound card on Tesla FSD board
> >>>
> >>> Signed-off-by: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>
> >>> ---
> >>> arch/arm64/boot/dts/tesla/fsd-evb.dts | 49
> >>> +++++++++++++++++++++++++++
> >>> arch/arm64/boot/dts/tesla/fsd.dtsi | 3 ++
> >>> 2 files changed, 52 insertions(+)
> >>>
> >>> diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> >>> b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> >>> index c0a4509499ab..ecaa3c2e3045 100644
> >>> --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> >>> +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> >>> @@ -49,3 +49,52 @@
> >>> &tdm_1 {
> >>> status = "okay";
> >>> };
> >>> +
> >>> +&sound {
> >>> + compatible = "tesla,fsd-sndcard";
> >>> + status = "okay";
> >>> + model = "fsd-i2s";
> >>> + widgets =
> >>> + "Speaker", "MAIN SPK",
> >>> + "Microphone", "MAIN MIC";
> >>> +
> >>> + primary-dai-link-0 {
> >>> + link-name = "fsd-primary-0";
> >>> + dai-format = "i2s";
> >>> + tesla,bitclock-master = <&tdm_0>;
> >>> + tesla,frame-master = <&tdm_0>;
> >>> + cpu {
> >>> + sound-dai = <&tdm_0 0>;
> >>> + };
> >>> + };
> >>> +
> >>> + secondary-dai-link-0 {
> >>> + link-name = "fsd-secondary-0";
> >>> + dai-format = "i2s";
> >>> + tesla,bitclock-master = <&tdm_0>;
> >>> + tesla,frame-master = <&tdm_0>;
> >>> + cpu {
> >>> + sound-dai = <&tdm_0 1>;
> >>> + };
> >>> + };
> >>> +
> >>> + primary-dai-link-1 {
> >>> + link-name = "fsd-primary-1";
> >>> + dai-format = "i2s";
> >>> + tesla,bitclock-master = <&tdm_1>;
> >>> + tesla,frame-master = <&tdm_1>;
> >>> + cpu {
> >>> + sound-dai = <&tdm_1 0>;
> >>> + };
> >>> + };
> >>> +
> >>> + secondary-dai-link-1 {
> >>> + link-name = "fsd-secondary-1";
> >>> + dai-format = "i2s";
> >>> + tesla,bitclock-master = <&tdm_1>;
> >>> + tesla,frame-master = <&tdm_1>;
> >>> + cpu {
> >>> + sound-dai = <&tdm_1 1>;
> >>> + };
> >>> + };
> >>> +};
> >>> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> b/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> index 5decad45a1b6..fc8931f830a7 100644
> >>> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> @@ -847,6 +847,9 @@
> >>> status = "disabled";
> >>> };
> >>>
> >>> + sound: sound {
> >>> + };
> >>> +
> >> Why to have an empty node in dtsi?
> > This is required as every node we use in dts should have the same
> > declared in
>
> I see no reason why this is required.
>
> > dtsi. Sound nodes in most of the platform is only declared (dummy
> > node) in dtsi and defining only in dts. Thus we are following the same.
>
> Can you point me to Samsung platform doing this?
>
> Keep the code consistent with Exynos style.

Okay, will add the sound node in accordance with Exynos style

>
> Best regards,
> Krzysztof