Re: [PATCH 1/2] arm64: dts: imx8qm-ss-conn: add usbotg3 iommu information

[Frank Li <Frank.li@oss.nxp.com>]

On Thu, Oct 29, 2026 at 07:55:41AM +0100, Emanuele Ghidoli wrote:
>
>
> On 10/28/26 22:05, Frank Li wrote:
> > Does it only impact superspeed? High speed work?
>
> No, it's not even enumerated, on the Dev board.
>
> >
> > Thank you report this problem. Suppose below patch should fix this problem.
> >
> > I have not time to test it today.
> >
> >
> > Frank
>
> Tested, it doesn't help.
>
> xhci-hcd.1.auto has no fwnode, so platform_dma_configure() never calls
> of_dma_configure() and the new code in of_iommu_configure() is never
> reached.

Finially, it is hack at uboot.

592: static int config_smmu_fdt_device_sid(void *blob, int device_offset, int sid)
601:     prop = fdt_getprop(blob, device_offset, "fsl,sc_rsrc_id", &proplen);
618:     ret = fdtdec_parse_phandle_with_args(blob, device_offset,
620:                                          "power-domains", ...
578:     err = sc_rm_set_master_sid(-1, rsrc, sid);
681:     prop = fdt_getprop(blob, offset, "iommus", &proplen);
848:     if (is_imx8qm()) { ret = config_smmu_fdt(blob);


Need combine power-domains with iommus.

diff --git a/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi b/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
index 176e2e332f87c..cc2b9a212780f 100644
--- a/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
@@ -189,6 +189,7 @@ usbotg3_cdns3: usb@5b120000 {
                        phys = <&usb3_phy>;
                        phy-names = "cdns3,usb3-phy";
                        cdns,on-chip-buff-size = /bits/ 16 <18>;
+                       power-domains = <&pd IMX_SC_R_USB_2>;
                        status = "disabled";
                };
        };

Frank

>
> Emanuele