linux-kernel - Re: [PATCH v2] arm64: dts: rockchip: add i2s and spdif endpoints of rk3328

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Message-ID: <71ab1337-3681-ecdc-4eb8-57ad5656db27@katsuster.net>
Date:   Mon, 17 Sep 2018 20:12:18 +0900
From:   Katsuhiro Suzuki <katsuhiro@...suster.net>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: dts: rockchip: add i2s and spdif endpoints of
 rk3328

Hello Heiko,

On 2018年09月17日 19:47, Heiko Stuebner wrote:
> Hi,
> 
> Am Montag, 17. September 2018, 10:55:55 CEST schrieb Katsuhiro Suzuki:
>> This patch adds port and endpoint of i2s and spdif nodes for rk3328.
>> Because to use modern sound card interface such as audio-graph-card.
>>
>> Signed-off-by: Katsuhiro Suzuki <katsuhiro@...suster.net>
>> ---
>>   arch/arm64/boot/dts/rockchip/rk3328.dtsi | 24 ++++++++++++++++++++++++
>>   1 file changed, 24 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
>> index d3ef6566325e..fd35dbd37ee2 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
>> @@ -179,7 +179,13 @@
>>   		clock-names = "i2s_clk", "i2s_hclk";
>>   		dmas = <&dmac 11>, <&dmac 12>;
>>   		dma-names = "tx", "rx";
>> +		#sound-dai-cells = <0>;
>>   		status = "disabled";
>> +
>> +		i2s0_p0: port {
>> +			i2s0_p0_0: endpoint {
>> +			};
>> +		};
> 
> I'm still pondering this. I.e. I'm not sure I really like adding all these
> empty nodes only to have them filled in board devicetrees.
> 
> This is specific to the audio-graph-card, and neither simple-audio-card
> nor the Rockchip-specific cards we have use something like this, so
> currently I'm tending to just have all audio-graph-nodes defined in the
> board devicetree using it.
> 
> For example similar to arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> or zte/zx296718-pcbox.dts do it.
> 
> It would be different if the graph-links were actually on the soc-level
> like vop<->hdmi or so, but this is completely board-specific.
> 
> Same for the others below.
> 
> Thoughts?
> Heiko

Hmm, OK. These nodes will move into the device tree of ROCK64.
Thank you for your advise!

Regards,
--
Katsuhiro Suzuki


> 
> 
>>   	};
>>   
>>   	i2s1: i2s@...10000 {
>> @@ -190,7 +196,13 @@
>>   		clock-names = "i2s_clk", "i2s_hclk";
>>   		dmas = <&dmac 14>, <&dmac 15>;
>>   		dma-names = "tx", "rx";
>> +		#sound-dai-cells = <0>;
>>   		status = "disabled";
>> +
>> +		i2s1_p0: port {
>> +			i2s1_p0_0: endpoint {
>> +			};
>> +		};
>>   	};
>>   
>>   	i2s2: i2s@...20000 {
>> @@ -201,7 +213,13 @@
>>   		clock-names = "i2s_clk", "i2s_hclk";
>>   		dmas = <&dmac 0>, <&dmac 1>;
>>   		dma-names = "tx", "rx";
>> +		#sound-dai-cells = <0>;
>>   		status = "disabled";
>> +
>> +		i2s2_p0: port {
>> +			i2s2_p0_0: endpoint {
>> +			};
>> +		};
>>   	};
>>   
>>   	spdif: spdif@...30000 {
>> @@ -214,7 +232,13 @@
>>   		dma-names = "tx";
>>   		pinctrl-names = "default";
>>   		pinctrl-0 = <&spdifm2_tx>;
>> +		#sound-dai-cells = <0>;
>>   		status = "disabled";
>> +
>> +		spdif_p0: port {
>> +			spdif_p0_0: endpoint {
>> +			};
>> +		};
>>   	};
>>   
>>   	pdm: pdm@...40000 {
>>
> 
> 
> 
> 
>