Re: [PATCH v4 9/9] arm64: dts: renesas: salvator: add a connection from adv748x codec (HDMI input) to the R-Car SoC

Geert Uytterhoeven
2020-03-30T08:33:03Z

Hi Alex,

On Thu, Mar 26, 2020 at 11:55 AM Alex Riesen
<alexander.riesen@cetitec.com> wrote:
> As all known variants of the Salvator board have the HDMI decoder
> chip (the ADV7482) connected to the SSI4 on R-Car SoC, the ADV7482
> endpoint and the connection definitions are placed in the common board
> file.
>
> For the same reason, the CLK_C clock line and I2C configuration (similar
> to the ak4613, on the same interface) are added into the common file.
>
> Signed-off-by: Alexander Riesen <alexander.riesen@cetitec.com>

Thanks for your patch!

> --- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> +++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> @@ -460,7 +460,7 @@ pca9654: gpio@20 {
> #gpio-cells = <2>;
> };
>
> - video-receiver@70 {
> + adv7482_hdmi_in: video-receiver@70 {
> compatible = "adi,adv7482";
> reg = <0x70 0x71 0x72 0x73 0x74 0x75
> 0x60 0x61 0x62 0x63 0x64 0x65>;
> @@ -469,6 +469,7 @@ video-receiver@70 {
>
> #address-cells = <1>;
> #size-cells = <0>;
> + #clock-cells = <0>; /* the MCLK for I2S output */
>
> interrupt-parent = <&gpio6>;
> interrupt-names = "intrq1", "intrq2";
> @@ -510,6 +511,15 @@ adv7482_txb: endpoint {
> remote-endpoint = <&csi20_in>;
> };
> };
> +
> + port@c {
> + reg = <12>;
> +
> + adv7482_i2s: endpoint {
> + remote-endpoint = <&rsnd_endpoint3>;
> + system-clock-direction-out;
> + };
> + };

As the adv748x driver just ignores "invalid" endpoints...

> @@ -733,8 +744,8 @@ &rcar_sound {
> pinctrl-0 = <&sound_pins &sound_clk_pins>;
> pinctrl-names = "default";
>
> - /* Single DAI */
> - #sound-dai-cells = <0>;
> + /* multi DAI */
> + #sound-dai-cells = <1>;
>
> /* audio_clkout0/1/2/3 */
> #clock-cells = <1>;
> @@ -758,8 +769,19 @@ &rcar_sound {
> <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
> <&cpg CPG_MOD 1019>, <&cpg CPG_MOD 1018>,
> <&audio_clk_a>, <&cs2000>,
> - <&audio_clk_c>,
> + <&adv7482_hdmi_in>,
> <&cpg CPG_CORE CPG_AUDIO_CLK_I>;

... and the rsnd driver ignores nonexistent-clocks, the DT change has no
hard dependency on the driver change, and won't introduce regressions
when included, right?

> @@ -777,6 +799,21 @@ rsnd_endpoint0: endpoint {
> capture = <&ssi1 &src1 &dvc1>;
> };
> };
> + rsnd_port3: port@3 {
> + reg = <3>;
> + rsnd_endpoint3: endpoint {
> + remote-endpoint = <&adv7482_i2s>;
> +
> + dai-tdm-slot-num = <8>;
> + dai-tdm-slot-width = <32>;
> + dai-format = "left_j";
> + mclk-fs = <256>;
> + bitclock-master = <&adv7482_i2s>;
> + frame-master = <&adv7482_i2s>;
> +
> + capture = <&ssi4>;
> + };
> + };
> };
> };

However, as salvator-common.dtsi is shared by all Salvator-X(S) variants,
you'll have to add a dummy ssi4 node to r8a77961.dtsi first.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds