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Reply-To: kieran.bingham@ideasonboard.com
Subject: Re: [PATCH v5 9/9] arm64: dts: renesas: salvator: add a connection
 from adv748x codec (HDMI input) to the R-Car SoC
To:     Alex Riesen <alexander.riesen@cetitec.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
        devel@driverdev.osuosl.org, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org
References: <cover.1585852001.git.alexander.riesen@cetitec.com>
 <90f2c14fcbe5d06eefdaeadbe8a6efc8c91523f3.1585852001.git.alexander.riesen@cetitec.com>
From:   Kieran Bingham <kieran.bingham@ideasonboard.com>
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Organization: Ideas on Board
Message-ID: <fd19ca3c-e815-499e-0c46-0a4e2684b6b9@ideasonboard.com>
Date:   Thu, 18 Jun 2020 17:32:55 +0100
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In-Reply-To: <90f2c14fcbe5d06eefdaeadbe8a6efc8c91523f3.1585852001.git.alexander.riesen@cetitec.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Alex,

On 02/04/2020 19:35, Alex Riesen 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>
> 
> --
> 
> v5: Add dummy ssi4 node to the rcar sound card in r8a77961, as the
>     devices (Salvator-X 2nd version with R-Car M3 W+) also reference
>     salvator-common.dtsi.
>     Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
> 
> v2: Also add ssi4_ctrl pin group in the sound pins. The pins are
>     responsible for SCK4 (sample clock) WS4 and (word boundary input),
>     and are required for SSI audio input over I2S.
> 
>     The adv748x shall provide its own implementation of the output clock
>     (MCLK), connected to the audio_clk_c line of the R-Car SoC.
> 
>     If the frequency of the ADV748x MCLK were fixed, the clock
>     implementation were not necessary, but it does not seem so: the MCLK
>     depends on the value in a speed multiplier register and the input sample
>     rate (48kHz).
> 
>     Remove audio clock C from the clocks of adv7482.
> 
>     The clocks property of the video-receiver node lists the input
>     clocks of the device, which is quite the opposite from the
>     original intention: the adv7482 on Salvator X boards is a
>     provide of the MCLK clock for I2S audio output.
> 
>     Remove old definition of &sound_card.dais and reduce size of changes
>     in the Salvator-X specific device tree source.
> 
>     Declare video-receiver a clock producer, as the adv748x driver
>     implements the master clock used I2S audio output.
> 
>     Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
> 
> v2: The driver provides only MCLK clock, not the SCLK and LRCLK,
>     which are part of the I2S protocol.
> 
>     Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  .../boot/dts/renesas/r8a77950-salvator-x.dts  |  3 +-
>  arch/arm64/boot/dts/renesas/r8a77961.dtsi     |  1 +
>  .../boot/dts/renesas/salvator-common.dtsi     | 47 +++++++++++++++++--
>  3 files changed, 45 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77950-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a77950-salvator-x.dts
> index 2438825c9b22..e16c146808b6 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77950-salvator-x.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77950-salvator-x.dts
> @@ -146,7 +146,8 @@ &sata {
>  &sound_card {
>  	dais = <&rsnd_port0	/* ak4613 */
>  		&rsnd_port1	/* HDMI0  */
> -		&rsnd_port2>;	/* HDMI1  */
> +		&rsnd_port2	/* HDMI1  */
> +		&rsnd_port3>;	/* adv7482 hdmi-in  */

Ah - that was confusing at first... but HDMI0 and HDMI1 are *outputs*,
where of course the adv7482 is an input ;-)


Otherwise, I can't spot anything else yet so:

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

But I fear there may have been some churn around here, so it would be
good to see a rebase too.

--
Kieran


>  };
>  
>  &usb2_phy2 {
> diff --git a/arch/arm64/boot/dts/renesas/r8a77961.dtsi b/arch/arm64/boot/dts/renesas/r8a77961.dtsi
> index be3824bda632..b79907beaf31 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77961.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a77961.dtsi
> @@ -861,6 +861,7 @@ rcar_sound,src {
>  			rcar_sound,ssi {
>  				ssi0: ssi-0 { };
>  				ssi1: ssi-1 { };
> +				ssi4: ssi-4 { };
>  			};
>  		};
>  
> diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> index 98bbcafc8c0d..ead7f8d7a929 100644
> --- 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;
> +			};
> +		};
>  	};
>  
>  	csa_vdd: adc@7c {
> @@ -684,7 +694,8 @@ sdhi3_pins_uhs: sd3_uhs {
>  	};
>  
>  	sound_pins: sound {
> -		groups = "ssi01239_ctrl", "ssi0_data", "ssi1_data_a";
> +		groups = "ssi01239_ctrl", "ssi0_data", "ssi1_data_a",
> +			 "ssi4_data", "ssi4_ctrl";
>  		function = "ssi";
>  	};
>  
> @@ -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>;
> +	clock-names = "ssi-all",
> +		      "ssi.9", "ssi.8", "ssi.7", "ssi.6",
> +		      "ssi.5", "ssi.4", "ssi.3", "ssi.2",
> +		      "ssi.1", "ssi.0",
> +		      "src.9", "src.8", "src.7", "src.6",
> +		      "src.5", "src.4", "src.3", "src.2",
> +		      "src.1", "src.0",
> +		      "mix.1", "mix.0",
> +		      "ctu.1", "ctu.0",
> +		      "dvc.0", "dvc.1",
> +		      "clk_a", "clk_b", "clk_c", "clk_i";
>  
>  	ports {
>  		#address-cells = <1>;
> @@ -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>;
> +			};
> +		};
>  	};
>  };
>  
> 

-- 
Regards
--
Kieran