On 22/04/2022 15:38, Christopher Obbard wrote: > The RK3328 has an vdec device with dedicated iommu. > Describe the device and required power-domains in the > devicetree. (...) > @@ -660,6 +664,25 @@ vpu_mmu: iommu@ff350800 { > power-domains = <&power RK3328_PD_VPU>; > }; > > + vdec: video-codec@ff360000 { > + compatible = "rockchip,rk3328-vdec", "rockchip,rk3399-vdec"; This does not match your bindings (according to bindings is incorrect) Did you test them with dtbs_check? Best regards, Krzysztof