In the patch:

diff --git a/arch/arm/dts/imx8mp.dtsi b/arch/arm/dts/imx8mp.dtsi
index 9a58bb376e..2a93307c4e 100644
--- a/arch/arm/dts/imx8mp.dtsi
+++ b/arch/arm/dts/imx8mp.dtsi
+			ldb_phy: phy@32ec0128 {
+				compatible = "fsl,imx8mp-lvds-phy";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				gpr = <&mediamix_blk_ctl>;
+				clocks = <&clk IMX8MP_CLK_MEDIA_APB_ROOT>;
+				clock-names = "apb";
+				power-domains = <&mediamix_pd>;
+				status = "disabled";
+
+				ldb_phy1: port@0 {
+					reg = <0>;
+					#phy-cells = <0>;
+				};
+
+				ldb_phy2: port@1 {
+					reg = <1>;
+					#phy-cells = <0>;
+				};
+			};
+



In my source code:
the command
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/uboot-imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/uboot-imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/uboot-imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/uboot-imx$ grep "fsl,imx8mp-lvds-phy" . -nr 
./arch/arm/dts/imx8mp.dtsi:1249:				compatible = "fsl,imx8mp-lvds-phy";
./arch/arm/dts/imx8mp.dtsi.orig:185:				compatible = "fsl,imx8mp-lvds-phy";
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/uboot-imx$


******************************************************************

#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/kernel_imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/kernel_imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/kernel_imx$
#cluo@cluo:/sd1/NXP/VT-SBC-BIOL/vendor/nxp-opensource/kernel_imx$ grep "fsl,imx8mp-lvds-phy" . -nr 
./drivers/phy/freescale/phy-fsl-imx8mp-lvds.c:254:	{ .compatible = "fsl,imx8mp-lvds-phy" },
./arch/arm64/boot/dts/freescale/imx8mp.dtsi:1375:				compatible = "fsl,imx8mp-lvds-phy";
./Documentation/devicetree/bindings/phy/fsl,imx8mp-lvds-phy.yaml:5:$id: http://devicetree.org/schemas/phy/fsl,imx8mp-lvds-phy.yaml#
./Documentation/devicetree/bindings/phy/fsl,imx8mp-lvds-phy.yaml:20:      - fsl,imx8mp-lvds-phy
./Documentation/devicetree/bindings/phy/fsl,imx8mp-lvds-phy.yaml:80:        compatible = "fsl,imx8mp-lvds-phy";


kernel have the  driver but uboot don't have.
thank you!