[PATCH 0/3] arm64: dts: imx93-11x11-evk: Add DY1212W-4856 LVDS panel

[PATCH 0/3] arm64: dts: imx93-11x11-evk: Add DY1212W-4856 LVDS panel

[Liu Ying]

Hi,

This patch series aims to add DY1212W-4856 [1] LVDS panel to i.MX93 11x11
EVK board.

Patch 1 allows LVDS Display Bridge (LDB) child node in i.MX93 mediamix
blk-ctrl DT binding.
Patch 2 adds LDB child node to mediamix blk-ctrl node in imx93.dtsi.
Patch 3 adds a DT overlay to support the DY1212W-4856 LVDS panel on
i.MX93 11x11 EVK board.

[1] https://www.nxp.com/design/design-center/development-boards-and-designs/dy1212w-4856-tft-lcd-panel-with-lvds-interface:DY1212W-4856

Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
Liu Ying (3):
      dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node
      arm64: dts: imx93: Add LVDS Display Bridge support
      arm64: dts: imx93-11x11-evk: Add DY1212W-4856 LVDS panel

 .../bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml | 38 ++++++++++
 arch/arm64/boot/dts/freescale/Makefile             |  4 ++
 .../freescale/imx93-11x11-evk-dy1212w-4856.dtso    | 81 ++++++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx93.dtsi           | 37 ++++++++++
 4 files changed, 160 insertions(+)
---
base-commit: e98d21c170b01ddef366f023bbfcf6b31509fa83
change-id: 20260513-imx93-ldb-c5a4194e41ce

Best regards,
--  
Regards,
Liu Ying

[PATCH 1/3] dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node

[Liu Ying]

i.MX93 SoC mediamix blk-ctrl contains one LDB_CTRL register and one LVDS
register which control video output through a LVDS interface.  Allow the
LVDS Display Bridge(LDB) child node and add the child node to example.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
 .../bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
index d828c2e82965..ab563b457e07 100644
--- a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
+++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
@@ -26,6 +26,12 @@ properties:
   reg:
     maxItems: 1
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
   '#power-domain-cells':
     const: 1
 
@@ -92,6 +98,11 @@ properties:
       - compatible
       - ports
 
+  bridge@20:
+    type: object
+    $ref: /schemas/display/bridge/fsl,ldb.yaml#
+    unevaluatedProperties: false
+
 allOf:
   - if:
       properties:
@@ -163,6 +174,8 @@ examples:
                <&clk IMX93_CLK_MIPI_DSI_GATE>;
                clock-names = "apb", "axi", "nic", "disp", "cam",
                              "pxp", "lcdif", "isi", "csi", "dsi";
+      #address-cells = <1>;
+      #size-cells = <1>;
       #power-domain-cells = <1>;
 
       dpi-bridge {
@@ -190,4 +203,29 @@ examples:
           };
         };
       };
+
+      bridge@20 {
+        compatible = "fsl,imx93-ldb";
+        reg = <0x20 0x4>, <0x24 0x4>;
+        reg-names = "ldb", "lvds";
+        clocks = <&clk IMX93_CLK_LVDS_GATE>;
+        clock-names = "ldb";
+
+        ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          port@0 {
+            reg = <0>;
+
+            endpoint {
+              remote-endpoint = <&lcdif_to_ldb>;
+            };
+          };
+
+          port@1 {
+            reg = <1>;
+          };
+        };
+      };
     };

-- 
2.43.0

Re: [PATCH 1/3] dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node

[Marco Felsch]

Hi Liu,

can we please wait for the outcome of this dicussion:

https://lore.kernel.org/all/uyh5s6g7bvuufnhfjrmungp5dbyllxfrgfzaxno22knpxxojmj@qqvh75ezblpp/

before we're going further?

Regards,
  Marco

On 26-05-13, Liu Ying wrote:
> i.MX93 SoC mediamix blk-ctrl contains one LDB_CTRL register and one LVDS
> register which control video output through a LVDS interface.  Allow the
> LVDS Display Bridge(LDB) child node and add the child node to example.
> 
> Signed-off-by: Liu Ying <victor.liu@nxp.com>
> ---
>  .../bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml | 38 ++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> index d828c2e82965..ab563b457e07 100644
> --- a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> @@ -26,6 +26,12 @@ properties:
>    reg:
>      maxItems: 1
>  
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 1
> +
>    '#power-domain-cells':
>      const: 1
>  
> @@ -92,6 +98,11 @@ properties:
>        - compatible
>        - ports
>  
> +  bridge@20:
> +    type: object
> +    $ref: /schemas/display/bridge/fsl,ldb.yaml#
> +    unevaluatedProperties: false
> +
>  allOf:
>    - if:
>        properties:
> @@ -163,6 +174,8 @@ examples:
>                 <&clk IMX93_CLK_MIPI_DSI_GATE>;
>                 clock-names = "apb", "axi", "nic", "disp", "cam",
>                               "pxp", "lcdif", "isi", "csi", "dsi";
> +      #address-cells = <1>;
> +      #size-cells = <1>;
>        #power-domain-cells = <1>;
>  
>        dpi-bridge {
> @@ -190,4 +203,29 @@ examples:
>            };
>          };
>        };
> +
> +      bridge@20 {
> +        compatible = "fsl,imx93-ldb";
> +        reg = <0x20 0x4>, <0x24 0x4>;
> +        reg-names = "ldb", "lvds";
> +        clocks = <&clk IMX93_CLK_LVDS_GATE>;
> +        clock-names = "ldb";
> +
> +        ports {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          port@0 {
> +            reg = <0>;
> +
> +            endpoint {
> +              remote-endpoint = <&lcdif_to_ldb>;
> +            };
> +          };
> +
> +          port@1 {
> +            reg = <1>;
> +          };
> +        };
> +      };
>      };
> 
> -- 
> 2.43.0
> 
> 
> 

-- 
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Re: [PATCH 1/3] dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The `bridge@20` child node is allowed unconditionally for all hardware variants in the binding, even though the i.MX91 hardware lacks an LVDS Display Bridge (LDB).
--

commit 1215972eab31b33c83565fc6226eed3ff41fba34
Author: Liu Ying <victor.liu@nxp.com>

dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node

This commit allows the LVDS Display Bridge child node in the i.MX93 media
blk-ctrl binding and adds it to the example. The LDB_CTRL and LVDS registers
control video output through the LVDS interface.

> diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> index d828c2e82965c..ab563b457e07a 100644
> --- a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml

[ ... ]

> @@ -92,6 +98,11 @@ properties:
>        - compatible
>        - ports
>  
> +  bridge@20:
> +    type: object
> +    $ref: /schemas/display/bridge/fsl,ldb.yaml#
> +    unevaluatedProperties: false
> +
>  allOf:
>    - if:
>        properties:

Since this binding is shared between fsl,imx91-media-blk-ctrl and
fsl,imx93-media-blk-ctrl, does adding bridge@20 to the top-level properties
unconditionally allow it for both variants?

If the i.MX91 hardware lacks the LVDS Display Bridge, should this child node
be explicitly disallowed by adding bridge@20: false to the allOf conditional
block for the i.MX91 compatible string?

Without this restriction, device trees incorrectly instantiating the LDB on
i.MX91 hardware might silently pass schema validation.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260513-imx93-ldb-v1-0-d11c5c3cc197@nxp.com?part=1

Re: [PATCH 1/3] dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node

[Liu Ying]

On Thu, May 14, 2026 at 03:51:55AM +0000, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Medium] The `bridge@20` child node is allowed unconditionally for all hardware variants in the binding, even though the i.MX91 hardware lacks an LVDS Display Bridge (LDB).
> --
> 
> commit 1215972eab31b33c83565fc6226eed3ff41fba34
> Author: Liu Ying <victor.liu@nxp.com>
> 
> dt-bindings: soc: imx: fsl,imx93-media-blk-ctrl: Allow LVDS Display Bridge child node
> 
> This commit allows the LVDS Display Bridge child node in the i.MX93 media
> blk-ctrl binding and adds it to the example. The LDB_CTRL and LVDS registers
> control video output through the LVDS interface.
> 
> > diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> > index d828c2e82965c..ab563b457e07a 100644
> > --- a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> > +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml
> 
> [ ... ]
> 
> > @@ -92,6 +98,11 @@ properties:
> >        - compatible
> >        - ports
> >  
> > +  bridge@20:
> > +    type: object
> > +    $ref: /schemas/display/bridge/fsl,ldb.yaml#
> > +    unevaluatedProperties: false
> > +
> >  allOf:
> >    - if:
> >        properties:
> 
> Since this binding is shared between fsl,imx91-media-blk-ctrl and
> fsl,imx93-media-blk-ctrl, does adding bridge@20 to the top-level properties
> unconditionally allow it for both variants?
> 
> If the i.MX91 hardware lacks the LVDS Display Bridge, should this child node
> be explicitly disallowed by adding bridge@20: false to the allOf conditional
> block for the i.MX91 compatible string?

Yes, this should be disallowed for i.MX91.

> 
> Without this restriction, device trees incorrectly instantiating the LDB on
> i.MX91 hardware might silently pass schema validation.
> 
> -- 
> Sashiko AI review · https://sashiko.dev/#/patchset/20260513-imx93-ldb-v1-0-d11c5c3cc197@nxp.com?part=1

-- 
Regards,
Liu Ying

[PATCH 2/3] arm64: dts: imx93: Add LVDS Display Bridge support

[Liu Ying]

Add LVDS Display Bridge(LDB) child node to mediamix blk-ctrl node
so that video could be output through a LVDS interface.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx93.dtsi | 37 ++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi b/arch/arm64/boot/dts/freescale/imx93.dtsi
index b9abe143cb56..79fb4a15b733 100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -178,6 +178,7 @@ &lcdif {
 	port {
 		lcdif_to_ldb: endpoint@1 {
 			reg = <1>;
+			remote-endpoint = <&ldb_from_lcdif>;
 		};
 
 		lcdif_to_dsi: endpoint@2 {
@@ -186,6 +187,42 @@ lcdif_to_dsi: endpoint@2 {
 	};
 };
 
+&media_blk_ctrl {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	lvds_bridge: bridge@20 {
+		compatible = "fsl,imx93-ldb";
+		reg = <0x20 0x4>, <0x24 0x4>;
+		reg-names = "ldb", "lvds";
+		clocks = <&clk IMX93_CLK_LVDS_GATE>;
+		clock-names = "ldb";
+		assigned-clocks = <&clk IMX93_CLK_MEDIA_LDB>;
+		assigned-clock-parents = <&clk IMX93_CLK_VIDEO_PLL>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				ldb_from_lcdif: endpoint {
+					remote-endpoint = <&lcdif_to_ldb>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				ldb_lvds_ch0: endpoint {
+				};
+			};
+		};
+	};
+};
+
 &src {
 	mlmix: power-domain@44461800 {
 		compatible = "fsl,imx93-src-slice";

-- 
2.43.0

[PATCH 3/3] arm64: dts: imx93-11x11-evk: Add DY1212W-4856 LVDS panel

[Liu Ying]

DY1212W-4856 [1] is a 12.1" (WXGA) TFT LCD panel with LVDS interface.
The panel's 40-pin connector allows it to be directly connected to
i.MX93 11x11 EVK board.

Link: https://www.nxp.com/design/design-center/development-boards-and-designs/dy1212w-4856-tft-lcd-panel-with-lvds-interface:DY1212W-4856 [1]
Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
 arch/arm64/boot/dts/freescale/Makefile             |  4 ++
 .../freescale/imx93-11x11-evk-dy1212w-4856.dtso    | 81 ++++++++++++++++++++++
 2 files changed, 85 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index d1bb303962db..42f655986987 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -467,6 +467,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-i3c.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtb
 
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk.dtb
+
+imx93-11x11-evk-dy1212w-4856-dtbs += imx93-11x11-evk.dtb imx93-11x11-evk-dy1212w-4856.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk-dy1212w-4856.dtb
+
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm.dtb
 
 imx93-11x11-frdm-pixpaper-dtbs += imx93-11x11-frdm.dtb imx93-11x11-frdm-pixpaper.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk-dy1212w-4856.dtso b/arch/arm64/boot/dts/freescale/imx93-11x11-evk-dy1212w-4856.dtso
new file mode 100644
index 000000000000..35f7c5699e3a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk-dy1212w-4856.dtso
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2026 NXP
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx93-clock.h>
+
+&{/} {
+	panel-lvds {
+		compatible = "boe,ev121wxm-n10-1850";
+		backlight = <&backlight_lvds>;
+		power-supply = <&buck4>;
+
+		panel-timing {
+			/*
+			 * Set clock frequency to 71142858Hz to accommodate
+			 * IMX93_CLK_VIDEO_PLL rate at 498000000Hz in a rate
+			 * table.
+			 */
+			clock-frequency = <71142858>;
+			hactive = <1280>;
+			vactive = <800>;
+			hfront-porch = <48>;
+			hback-porch = <80>;
+			hsync-len = <32>;
+			vfront-porch = <3>;
+			vback-porch = <14>;
+			vsync-len = <6>;
+		};
+
+		port {
+			panel_lvds_in: endpoint {
+				remote-endpoint = <&ldb_lvds_ch0>;
+			};
+		};
+	};
+};
+
+&backlight_lvds {
+	status = "okay";
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&lvds_bridge {
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@1 {
+			reg = <1>;
+
+			ldb_lvds_ch0: endpoint {
+				remote-endpoint = <&panel_lvds_in>;
+			};
+		};
+	};
+};
+
+&media_blk_ctrl {
+	assigned-clocks = <&clk IMX93_CLK_MEDIA_AXI>,
+			  <&clk IMX93_CLK_MEDIA_APB>,
+			  <&clk IMX93_CLK_MEDIA_DISP_PIX>,
+			  <&clk IMX93_CLK_VIDEO_PLL>;
+	assigned-clock-parents = <&clk IMX93_CLK_SYS_PLL_PFD1>,
+				 <&clk IMX93_CLK_SYS_PLL_PFD1_DIV2>,
+				 <&clk IMX93_CLK_VIDEO_PLL>;
+	/*
+	 * Set IMX93_CLK_MEDIA_DISP_PIX rate to 71142858Hz to accommodate
+	 * IMX93_CLK_VIDEO_PLL rate at 498000000Hz in a rate table.
+	 */
+	assigned-clock-rates = <400000000>, <133333333>, <71142858>, <498000000>;
+	status = "okay";
+};

-- 
2.43.0