dt-bindings: display: imx: convert fsl-imx-drm.txt to yaml format

Convert fsl-imx-drm.txt to yaml format and create 5 yaml files for
differences purpose.

Additional changes:
- add missed include file in examples.
- add clocks, clock-names for ipu.

Signed-off-by: Frank Li <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

Documentation/devicetree/bindings/display/imx/fsl,imx-display-subsystem.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx-display-subsystem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX DRM master device
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+description:
+  The freescale i.MX DRM master device is a virtual device needed to list all
+  IPU or other display interface nodes that comprise the graphics subsystem.
+
+properties:
+  compatible:
+    const: fsl,imx-display-subsystem
+
+  ports:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Should contain a list of phandles pointing to camera
+      sensor interface ports of IPU devices.
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    display-subsystem {
+        compatible = "fsl,imx-display-subsystem";
+        ports = <&ipu_di0>;
+    };

Documentation/devicetree/bindings/display/imx/fsl,imx-parallel-display.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx-parallel-display.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Parallel display support
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    const: fsl,imx-parallel-display
+
+  interface-pix-fmt:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - rgb24
+      - rgb565
+      - bgr666
+      - lvds666
+
+  ddc:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle describing the i2c bus handling the display data channel
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  port@0:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: input port connected to the IPU display interface
+
+  port@1:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: output port connected to a panel
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    display {
+        compatible = "fsl,imx-parallel-display";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interface-pix-fmt = "rgb24";
+
+        port@0 {
+            reg = <0>;
+
+            endpoint {
+                remote-endpoint = <&ipu_di0_disp0>;
+            };
+        };
+
+        port@1 {
+            reg = <1>;
+
+            endpoint {
+                remote-endpoint = <&panel_in>;
+            };
+        };
+    };
+

Documentation/devicetree/bindings/display/imx/fsl,imx6q-ipu.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx6q-ipu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX IPUv3
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,imx51-ipu
+          - fsl,imx53-ipu
+          - fsl,imx6q-ipu
+      - items:
+          - const: fsl,imx6qp-ipu
+          - const: fsl,imx6q-ipu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    maxItems: 2
+
+  clocks:
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: bus
+      - const: di0
+      - const: di1
+
+  resets:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  fsl,prg:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to prg node associated with this IPU instance
+
+  port@0:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: CSI0
+
+  port@1:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: CSI1
+
+  port@2:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: DI0
+
+  port@3:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: DI1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    display-controller@18000000 {
+        compatible = "fsl,imx53-ipu";
+        reg = <0x18000000 0x080000000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <11 10>;
+        resets = <&src 2>;
+
+        port@2 {
+            reg = <2>;
+
+            endpoint {
+                remote-endpoint = <&display_in>;
+            };
+        };
+    };

Documentation/devicetree/bindings/display/imx/fsl,imx6qp-pre.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx6qp-pre.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX PRE (Prefetch Resolve Engine)
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    const: fsl,imx6qp-pre
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: axi
+  fsl,iram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle pointing to the mmio-sram device node, that should be
+      used for the PRE SRAM double buffer.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx6qdl-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    pre@21c8000 {
+        compatible = "fsl,imx6qp-pre";
+        reg = <0x021c8000 0x1000>;
+        interrupts = <GIC_SPI 90 IRQ_TYPE_EDGE_RISING>;
+        clocks = <&clks IMX6QDL_CLK_PRE0>;
+        clock-names = "axi";
+        fsl,iram = <&ocram2>;
+    };

Documentation/devicetree/bindings/display/imx/fsl,imx6qp-prg.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx6qp-prg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX PRG (Prefetch Resolve Gasket)
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    const: fsl,imx6qp-prg
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: ipg
+      - const: axi
+
+  fsl,pres:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      maxItems: 1
+    description:
+      phandles to the PRE units attached to this PRG, with the fixed
+      PRE as the first entry and the muxable PREs following.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx6qdl-clock.h>
+
+    prg@21cc000 {
+        compatible = "fsl,imx6qp-prg";
+        reg = <0x021cc000 0x1000>;
+        clocks = <&clks IMX6QDL_CLK_PRG0_APB>, <&clks IMX6QDL_CLK_PRG0_AXI>;
+        clock-names = "ipg", "axi";
+        fsl,pres = <&pre1>, <&pre2>, <&pre3>;
+    };
+

Documentation/devicetree/bindings/display/imx/fsl-imx-drm.txt

···
-Freescale i.MX DRM master device
-================================
-
-The freescale i.MX DRM master device is a virtual device needed to list all
-IPU or other display interface nodes that comprise the graphics subsystem.
-
-Required properties:
-- compatible: Should be "fsl,imx-display-subsystem"
-- ports: Should contain a list of phandles pointing to display interface ports
-  of IPU devices
-
-example:
-
-display-subsystem {
-	compatible = "fsl,imx-display-subsystem";
-	ports = <&ipu_di0>;
-};
-
-
-Freescale i.MX IPUv3
-====================
-
-Required properties:
-- compatible: Should be "fsl,<chip>-ipu" where <chip> is one of
-  - imx51
-  - imx53
-  - imx6q
-  - imx6qp
-- reg: should be register base and length as documented in the
-  datasheet
-- interrupts: Should contain sync interrupt and error interrupt,
-  in this order.
-- resets: phandle pointing to the system reset controller and
-          reset line index, see reset/fsl,imx-src.txt for details
-Additional required properties for fsl,imx6qp-ipu:
-- fsl,prg: phandle to prg node associated with this IPU instance
-Optional properties:
-- port@[0-3]: Port nodes with endpoint definitions as defined in
-  Documentation/devicetree/bindings/media/video-interfaces.txt.
-  Ports 0 and 1 should correspond to CSI0 and CSI1,
-  ports 2 and 3 should correspond to DI0 and DI1, respectively.
-
-example:
-
-ipu: ipu@18000000 {
-	#address-cells = <1>;
-	#size-cells = <0>;
-	compatible = "fsl,imx53-ipu";
-	reg = <0x18000000 0x080000000>;
-	interrupts = <11 10>;
-	resets = <&src 2>;
-
-	ipu_di0: port@2 {
-		reg = <2>;
-
-		ipu_di0_disp0: endpoint {
-			remote-endpoint = <&display_in>;
-		};
-	};
-};
-
-Freescale i.MX PRE (Prefetch Resolve Engine)
-============================================
-
-Required properties:
-- compatible: should be "fsl,imx6qp-pre"
-- reg: should be register base and length as documented in the
-  datasheet
-- clocks : phandle to the PRE axi clock input, as described
-  in Documentation/devicetree/bindings/clock/clock-bindings.txt and
-  Documentation/devicetree/bindings/clock/imx6q-clock.yaml.
-- clock-names: should be "axi"
-- interrupts: should contain the PRE interrupt
-- fsl,iram: phandle pointing to the mmio-sram device node, that should be
-  used for the PRE SRAM double buffer.
-
-example:
-
-pre@21c8000 {
-	compatible = "fsl,imx6qp-pre";
-	reg = <0x021c8000 0x1000>;
-	interrupts = <GIC_SPI 90 IRQ_TYPE_EDGE_RISING>;
-	clocks = <&clks IMX6QDL_CLK_PRE0>;
-	clock-names = "axi";
-	fsl,iram = <&ocram2>;
-};
-
-Freescale i.MX PRG (Prefetch Resolve Gasket)
-============================================
-
-Required properties:
-- compatible: should be "fsl,imx6qp-prg"
-- reg: should be register base and length as documented in the
-  datasheet
-- clocks : phandles to the PRG ipg and axi clock inputs, as described
-  in Documentation/devicetree/bindings/clock/clock-bindings.txt and
-  Documentation/devicetree/bindings/clock/imx6q-clock.yaml.
-- clock-names: should be "ipg" and "axi"
-- fsl,pres: phandles to the PRE units attached to this PRG, with the fixed
-  PRE as the first entry and the muxable PREs following.
-
-example:
-
-prg@21cc000 {
-	compatible = "fsl,imx6qp-prg";
-	reg = <0x021cc000 0x1000>;
-	clocks = <&clks IMX6QDL_CLK_PRG0_APB>,
-		 <&clks IMX6QDL_CLK_PRG0_AXI>;
-	clock-names = "ipg", "axi";
-	fsl,pres = <&pre1>, <&pre2>, <&pre3>;
-};
-
-Parallel display support
-========================
-
-Required properties:
-- compatible: Should be "fsl,imx-parallel-display"
-Optional properties:
-- interface-pix-fmt: How this display is connected to the
-  display interface. Currently supported types: "rgb24", "rgb565", "bgr666"
-  and "lvds666".
-- ddc: phandle describing the i2c bus handling the display data
-  channel
-- port@[0-1]: Port nodes with endpoint definitions as defined in
-  Documentation/devicetree/bindings/media/video-interfaces.txt.
-  Port 0 is the input port connected to the IPU display interface,
-  port 1 is the output port connected to a panel.
-
-example:
-
-disp0 {
-	compatible = "fsl,imx-parallel-display";
-	interface-pix-fmt = "rgb24";
-
-	port@0 {
-		reg = <0>;
-
-		display_in: endpoint {
-			remote-endpoint = <&ipu_di0_disp0>;
-		};
-	};
-
-	port@1 {
-		reg = <1>;
-
-		display_out: endpoint {
-			remote-endpoint = <&panel_in>;
-		};
-	};
-};
-
-panel {
-	...
-
-	port {
-		panel_in: endpoint {
-			remote-endpoint = <&display_out>;
-		};
-	};
-};