dt-bindings: media: mediatek: mdp3: merge the indentical RDMA under display

To simplify maintenance and avoid branches, the identical component
should be merged and placed in the path belonging to the MDP
(from display/* to media/*).

In addition, currently only MDP utilizes RDMA through CMDQ, and the
necessary properties for "mediatek,gce-events", and "mboxes" have been
set up for this purpose.
Within DISP, it directly receives component interrupt signals.
Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml

-# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/display/mediatek/mediatek,mdp-rdma.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: MediaTek MDP RDMA
-
-maintainers:
-  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
-  - Philipp Zabel <p.zabel@pengutronix.de>
-
-description:
-  The MediaTek MDP RDMA stands for Read Direct Memory Access.
-  It provides real time data to the back-end panel driver, such as DSI,
-  DPI and DP_INTF.
-  It contains one line buffer to store the sufficient pixel data.
-  RDMA device node must be siblings to the central MMSYS_CONFIG node.
-  For a description of the MMSYS_CONFIG binding, see
-  Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml for details.
-
-properties:
-  compatible:
-    oneOf:
-      - const: mediatek,mt8195-vdo1-rdma
-      - items:
-          - const: mediatek,mt8188-vdo1-rdma
-          - const: mediatek,mt8195-vdo1-rdma
-
-  reg:
-    maxItems: 1
-
-  interrupts:
-    maxItems: 1
-
-  power-domains:
-    maxItems: 1
-
-  clocks:
-    items:
-      - description: RDMA Clock
-
-  iommus:
-    maxItems: 1
-
-  mediatek,gce-client-reg:
-    description:
-      The register of display function block to be set by gce. There are 4 arguments,
-      such as gce node, subsys id, offset and register size. The subsys id that is
-      mapping to the register of display function blocks is defined in the gce header
-      include/dt-bindings/gce/<chip>-gce.h of each chips.
-    $ref: /schemas/types.yaml#/definitions/phandle-array
-    items:
-      items:
-        - description: phandle of GCE
-        - description: GCE subsys id
-        - description: register offset
-        - description: register size
-    maxItems: 1
-
-required:
-  - compatible
-  - reg
-  - power-domains
-  - clocks
-  - iommus
-  - mediatek,gce-client-reg
-
-additionalProperties: false
-
-examples:
-  - |
-    #include <dt-bindings/interrupt-controller/arm-gic.h>
-    #include <dt-bindings/clock/mt8195-clk.h>
-    #include <dt-bindings/power/mt8195-power.h>
-    #include <dt-bindings/gce/mt8195-gce.h>
-    #include <dt-bindings/memory/mt8195-memory-port.h>
-
-    soc {
-        #address-cells = <2>;
-        #size-cells = <2>;
-
-        rdma@1c104000 {
-            compatible = "mediatek,mt8195-vdo1-rdma";
-            reg = <0 0x1c104000 0 0x1000>;
-            interrupts = <GIC_SPI 495 IRQ_TYPE_LEVEL_HIGH 0>;
-            clocks = <&vdosys1 CLK_VDO1_MDP_RDMA0>;
-            power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
-            iommus = <&iommu_vdo M4U_PORT_L2_MDP_RDMA0>;
-            mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX 0x4000 0x1000>;
-        };
-    };

Documentation/devicetree/bindings/media/mediatek,mdp3-rdma.yaml

@@ -20,8 +20,13 @@ description: |
 
 properties:
   compatible:
-    items:
-      - const: mediatek,mt8183-mdp3-rdma
+    oneOf:
+      - enum:
+          - mediatek,mt8183-mdp3-rdma
+          - mediatek,mt8195-vdo1-rdma
+      - items:
+          - const: mediatek,mt8188-vdo1-rdma
+          - const: mediatek,mt8195-vdo1-rdma
 
   reg:
     maxItems: 1
@@ -60,6 +65,7 @@ properties:
     items:
       - description: RDMA clock
       - description: RSZ clock
+    minItems: 1
 
   iommus:
     maxItems: 1
@@ -68,6 +74,10 @@ properties:
     items:
       - description: used for 1st data pipe from RDMA
       - description: used for 2nd data pipe from RDMA
+    minItems: 1
+
+  interrupts:
+    maxItems: 1
 
   '#dma-cells':
     const: 1
@@ -76,13 +86,41 @@ required:
   - compatible
   - reg
   - mediatek,gce-client-reg
-  - mediatek,gce-events
   - power-domains
   - clocks
   - iommus
-  - mboxes
   - '#dma-cells'
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8183-mdp3-rdma
+
+    then:
+      properties:
+        clocks:
+          minItems: 2
+
+        mboxes:
+          minItems: 2
+
+      required:
+        - mboxes
+        - mediatek,gce-events
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8195-vdo1-rdma
+
+    then:
+      properties:
+        clocks:
+          maxItems: 1
+
 additionalProperties: false
 
 examples: