Hi Cristian,

Le lundi 23 février 2026 à 14:25 +0200, Cristian Ciocaltea a écrit :
> When building device trees for the RK3576 based boards, DTC shows the
> following complaint:
> 
>   rk3576.dtsi:1282.30-1304.5: Warning (simple_bus_reg):
> /soc/video-codec@27b00000: simple-bus unit address format error, expected
> "27b00100"
> 
> Provide the register blocks in the expected address-based order.
> 
> Fixes: da0de806d8b4 ("arm64: dts: rockchip: Add the vdpu383 Video Decoder on
> rk3576")
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3576.dtsi | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> index 49ccdf12ef7e..45eb0d053a6f 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> @@ -1281,10 +1281,10 @@ gpu: gpu@27800000 {
>  
>  		vdec: video-codec@27b00000 {
>  			compatible = "rockchip,rk3576-vdec";
> -			reg = <0x0 0x27b00100 0x0 0x500>,
> -			      <0x0 0x27b00000 0x0 0x100>,
> +			reg = <0x0 0x27b00000 0x0 0x100>,
> +			      <0x0 0x27b00100 0x0 0x500>,
>  			      <0x0 0x27b00600 0x0 0x100>;
> -			reg-names = "function", "link", "cache";
> +			reg-names = "link", "function", "cache";

I have a vague memory it was done on purpose, due to the "items" in the bindings
requiring to follow the same order. I was not enable to run the DT checks today
(some pythonic version miss-match issue), but wanted to raise the flag.

Nicolas

>  			interrupts = <GIC_SPI 308 IRQ_TYPE_LEVEL_HIGH>;
>  			clocks = <&cru ACLK_RKVDEC_ROOT>, <&cru HCLK_RKVDEC>,
>  				 <&cru ACLK_RKVDEC_ROOT_BAK>, <&cru
> CLK_RKVDEC_CORE>,
> 
> ---
> base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
> change-id: 20260223-vdec-reg-order-rk3576-cc2ec6e05e98