linux-kernel - Re: [RFT 25/25] ARM: dts: s5pv210: align DMA channels with dtschema

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Message-ID: <BN6PR04MB06605FBC44DFE283C040AFD5CB290@BN6PR04MB0660.namprd04.prod.outlook.com>
Date:   Mon, 7 Sep 2020 17:17:44 -0700
From:   Jonathan Bakker <xc-racer2@...e.ca>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: Re: [RFT 25/25] ARM: dts: s5pv210: align DMA channels with dtschema

Initial testing on both an i9000 and an SGH-T959P are showing that the audio has
stopped working with this.  I'm not 100% convinced as I've had DMA issues in the
past.  However trying to play something just results in a hang after 1.5s while
it works just fine without this patch.

Thanks,
Jonathan

On 2020-09-07 9:11 a.m., Krzysztof Kozlowski wrote:
> dtschema expects DMA channels in specific order (tx, rx and tx-sec).
> The order actually should not matter because dma-names is used however
> let's make it aligned with dtschema to suppress warnings like:
> 
>   i2s@...30000: dma-names: ['rx', 'tx', 'tx-sec'] is not valid under any of the given schemas
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  arch/arm/boot/dts/s5pv210.dtsi | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/s5pv210.dtsi b/arch/arm/boot/dts/s5pv210.dtsi
> index 96e667ba1c3f..72fb9d9f7ba3 100644
> --- a/arch/arm/boot/dts/s5pv210.dtsi
> +++ b/arch/arm/boot/dts/s5pv210.dtsi
> @@ -240,8 +240,8 @@
>  			reg = <0xeee30000 0x1000>;
>  			interrupt-parent = <&vic2>;
>  			interrupts = <16>;
> -			dma-names = "rx", "tx", "tx-sec";
> -			dmas = <&pdma1 9>, <&pdma1 10>, <&pdma1 11>;
> +			dma-names = "tx", "rx", "tx-sec";
> +			dmas = <&pdma1 10>, <&pdma1 9>, <&pdma1 11>;
>  			clock-names = "iis",
>  				      "i2s_opclk0",
>  				      "i2s_opclk1";
> @@ -260,8 +260,8 @@
>  			reg = <0xe2100000 0x1000>;
>  			interrupt-parent = <&vic2>;
>  			interrupts = <17>;
> -			dma-names = "rx", "tx";
> -			dmas = <&pdma1 12>, <&pdma1 13>;
> +			dma-names = "tx", "rx";
> +			dmas = <&pdma1 13>, <&pdma1 12>;
>  			clock-names = "iis", "i2s_opclk0";
>  			clocks = <&clocks CLK_I2S1>, <&clocks SCLK_AUDIO1>;
>  			pinctrl-names = "default";
> @@ -275,8 +275,8 @@
>  			reg = <0xe2a00000 0x1000>;
>  			interrupt-parent = <&vic2>;
>  			interrupts = <18>;
> -			dma-names = "rx", "tx";
> -			dmas = <&pdma1 14>, <&pdma1 15>;
> +			dma-names = "tx", "rx";
> +			dmas = <&pdma1 15>, <&pdma1 14>;
>  			clock-names = "iis", "i2s_opclk0";
>  			clocks = <&clocks CLK_I2S2>, <&clocks SCLK_AUDIO2>;
>  			pinctrl-names = "default";
>