Re: [PATCH v3 6/7] arm64: dts: renesas: sparrow-hawk: Enable DisplayPort by adding DSC

[Laurent Pinchart]

Hi Tomi and Marek,

Thank you for the patch.

On Fri, May 15, 2026 at 12:09:31PM +0300, Tomi Valkeinen wrote:
> From: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
> 
> DisplayPort on the Sparrow Hawk board uses sn65dsi86 bridge, which in
> turn gets the video stream from the SoC's DSI1 port. DSI1 pipeline has a
> DSC block in between the DU and the DSI1. However, there was no DSC
> driver in Linux and also the DSC was not defined in the dts files, and
> thus the DisplayPort output did not work.
> 
> Now that we have DSC defined in the SoC dts file (r8a779g0.dtsi), we can
> enable DSC for sparrowhawk.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
> [tomi.valkeinen: separated the sparrow hawk changes from the soc changes]
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

> ---
>  arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
> index 812b133cf29e..f418998c6b05 100644
> --- a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts
> @@ -288,6 +288,11 @@ channel4 {
>  	};
>  };
>  
> +/* Page 27 / DSI to Display */
> +&dsc {
> +	status = "okay";
> +};
> +
>  /* Page 27 / DSI to Display */
>  &dsi1 {
>  	status = "okay";
> 

-- 
Regards,

Laurent Pinchart