diff --git a/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts b/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
index 14108ce2ec44..6ee793c9dd84 100644
--- a/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
+++ b/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
@@ -838,7 +838,7 @@
 
 &meson_fb {
 	status = "okay";
-	display_size_default = <1920 1080 1920 2160 32>;
+	display_size_default = <1080 1920 1080 3840 32>; /* portrait panel */
 	mem_size = <0x00800000 0x1980000 0x100000 0x100000 0x800000>;
 	logo_addr = "0x7f800000";
 	mem_alloc = <0>;
diff --git a/arch/arm/boot/dts/amlogic/g12b_a311d_w400_a.dts b/arch/arm/boot/dts/amlogic/g12b_a311d_w400_a.dts
index 776d2784a22e..1332451cf760 100644
--- a/arch/arm/boot/dts/amlogic/g12b_a311d_w400_a.dts
+++ b/arch/arm/boot/dts/amlogic/g12b_a311d_w400_a.dts
@@ -812,7 +812,7 @@
 
 &meson_fb {
 	status = "okay";
-	display_size_default = <1920 1080 1920 2160 32>;
+	display_size_default = <1080 1920 1080 3840 32>; /* portrait panel */
 	mem_size = <0x00800000 0x1980000 0x100000 0x100000 0x800000>;
 	logo_addr = "0x7f800000";
 	mem_alloc = <0>;
diff --git a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
index 570a43abd49d..55895ef7c160 100644
--- a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
+++ b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
@@ -839,7 +839,7 @@
 
 &meson_fb {
 	status = "okay";
-	display_size_default = <1920 1080 1920 2160 32>;
+	display_size_default = <1080 1920 1080 3840 32>; /* portrait panel */
 	mem_size = <0x00800000 0x1980000 0x100000 0x100000 0x800000>;
 	logo_addr = "0x7f800000";
 	mem_alloc = <0>;
diff --git a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_a.dts b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_a.dts
index d73e4cf22c34..f285d1f9cce0 100644
--- a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_a.dts
+++ b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_a.dts
@@ -813,7 +813,7 @@
 
 &meson_fb {
 	status = "okay";
-	display_size_default = <1920 1080 1920 2160 32>;
+	display_size_default = <1080 1920 1080 3840 32>; /* portrait panel */
 	mem_size = <0x00800000 0x1980000 0x100000 0x100000 0x800000>;
 	logo_addr = "0x7f800000";
 	mem_alloc = <0>;