Re: [PATCH v2] arm64: dts: imx8mq: Add DCSS node

[Alexander Stein]

Am Samstag, 11. Juli 2026, 12:18:42 CEST schrieb Esben Haabendal:
> Add node for iMX8MQ Display Controller Subsystem.
> 
> Reviewed-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Signed-off-by: Esben Haabendal <esben@xxxxxxxxxx>
> ---
> This is basically a resend of a patch from 2020 [1], which seems to have
> fallen through the cracks.
> 
> I did not notice that patch before sending my v1. As of v2, this patch is
> identical to the old patch, so I have added the Reviewed-by tag from that.
> If that is not proper, please remove it before merging it.
> 
> [1] https://lore.kernel.org/all/20201125103909.16548-1-laurentiu.palcu@xxxxxxxxxxx/

Looks okay so far, similar to the one I was using for tests.
Acked-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>

Unfortunately the DP/HDMI output driver is still work in progress and last
time I tried (v17 IIRC), it didn't work on my platform.

Best regards,
Alexander

[1] https://lore.kernel.org/all/20260519-dcss-hdmi-upstreaming-v23-0-5615524a9c63@xxxxxxxxxxx/

> ---
> Changes in v2:
> - Moved dcss node under aips4 bus.
> - Link to v1: https://patch.msgid.link/20260710-imx8mq-dcss-device-tree-node-v1-1-fc724dfd574e@xxxxxxxxxx
> 
> To: Rob Herring <robh@xxxxxxxxxx>
> To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
> To: Conor Dooley <conor+dt@xxxxxxxxxx>
> To: Frank Li <Frank.Li@xxxxxxx>
> To: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> To: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
> To: Fabio Estevam <festevam@xxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: imx@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
>  arch/arm64/boot/dts/freescale/imx8mq.dtsi | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> index e60872aeeb49..d75710cdb5b4 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> @@ -1598,6 +1598,29 @@ aips4: bus@32c00000 { /* AIPS4 */
>  			#size-cells = <1>;
>  			ranges = <0x32c00000 0x32c00000 0x400000>;
>  
> +			dcss: display-controller@32e00000 {
> +				compatible = "nxp,imx8mq-dcss";
> +				reg = <0x32e00000 0x2d000>, <0x32e2f000 0x1000>;
> +				interrupts = <6>, <8>, <9>;
> +				interrupt-names = "ctxld", "ctxld_kick", "vblank";
> +				interrupt-parent = <&irqsteer>;
> +				clocks = <&clk IMX8MQ_CLK_DISP_APB_ROOT>,
> +					 <&clk IMX8MQ_CLK_DISP_AXI_ROOT>,
> +					 <&clk IMX8MQ_CLK_DISP_RTRM_ROOT>,
> +					 <&clk IMX8MQ_VIDEO2_PLL_OUT>,
> +					 <&clk IMX8MQ_CLK_DISP_DTRC>;
> +				clock-names = "apb", "axi", "rtrm", "pix", "dtrc";
> +				assigned-clocks = <&clk IMX8MQ_CLK_DISP_AXI>,
> +						  <&clk IMX8MQ_CLK_DISP_RTRM>,
> +						  <&clk IMX8MQ_VIDEO2_PLL1_REF_SEL>;
> +				assigned-clock-parents = <&clk IMX8MQ_SYS1_PLL_800M>,
> +							 <&clk IMX8MQ_SYS1_PLL_800M>,
> +							 <&clk IMX8MQ_CLK_27M>;
> +				assigned-clock-rates = <800000000>,
> +						       <400000000>;
> +				status = "disabled";
> +			};
> +
>  			irqsteer: interrupt-controller@32e2d000 {
>  				compatible = "fsl,imx8m-irqsteer", "fsl,imx-irqsteer";
>  				reg = <0x32e2d000 0x1000>;
> 
> ---
> base-commit: 8cdeaa50eae8dad34885515f62559ee83e7e8dda
> change-id: 20260710-imx8mq-dcss-device-tree-node-9df58de085ea
> 
> Best regards,
> --  
> Esben Haabendal <esben@xxxxxxxxxx>
> 
> 
> 


-- 
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
http://www.tq-group.com/