diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w103.dts b/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w103.dts
index c09f750f2031..ca7af772a1ec 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w103.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w103.dts
@@ -1055,6 +1055,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&sdmmc1_bus4 &sdmmc1_cmd &sdmmc1_clk>;
 	sd-uhs-sdr104;
+	rockchip,default-sample-phase = <90>;
 	status = "okay";
 };
 
diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w6.dts b/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w6.dts
index b781b244c0ce..85b3894ae1a2 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w6.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-rk817-eink-w6.dts
@@ -908,6 +908,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&sdmmc1_bus4 &sdmmc1_cmd &sdmmc1_clk>;
 	sd-uhs-sdr104;
+	rockchip,default-sample-phase = <90>;
 	status = "okay";
 };