Hi,

Le mardi 24 février 2026 à 08:22 +0100, Krzysztof Kozlowski a écrit :

On Mon, Feb 23, 2026 at 09:49:50PM +0200, Cristian Ciocaltea wrote:

quoted

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"

So you need to fix the unit address. This is what the warning tells you.

The unit address is where the register range starts. Picking a random point
inside the range is just bad idea. For anyone that uses spec to develop these
drivers and device tree, its just plain difficult and error prone.

quoted

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 <redacted>
---
 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>;

The main block, so probably the lowest address as in unit address,
should be used, but this ship has sailed. You shipped this DTS, because
the order of items is FIXED. Your binding change is clearly incorrect
and ABI break without explanation and without reason, so you cannot use
such as an argument here.

Its not released yet.

You cannot change it without impact, so just fix the unit address.

I completely disagree with that.

Nicolas