dt-bindings: display: mediatek: merge: add additional prop for mt8195

add MERGE additional properties description for mt8195:
1. async clock
2. fifo setting enable
3. reset controller

Signed-off-by: jason-jh.lin <jason-jh.lin@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml

@@ -36,8 +36,28 @@ properties:
       Documentation/devicetree/bindings/power/power-domain.yaml for details.
 
   clocks:
+    maxItems: 2
     items:
       - description: MERGE Clock
+      - description: MERGE Async Clock
+          Controlling the synchronous process between MERGE and other display
+          function blocks cross clock domain.
+
+  clock-names:
+    maxItems: 2
+    items:
+      - const: merge
+      - const: merge_async
+
+  mediatek,merge-fifo-en:
+    description:
+      The setting of merge fifo is mainly provided for the display latency
+      buffer to ensure that the back-end panel display data will not be
+      underrun, a little more data is needed in the fifo.
+      According to the merge fifo settings, when the water level is detected
+      to be insufficient, it will trigger RDMA sending ultra and preulra
+      command to SMI to speed up the data rate.
+    type: boolean
 
   mediatek,gce-client-reg:
     description: The register of client driver can be configured by gce with
@@ -47,6 +67,11 @@ properties:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     maxItems: 1
 
+  resets:
+    description: reset controller
+      See Documentation/devicetree/bindings/reset/reset.txt for details.
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -64,3 +89,16 @@ examples:
         power-domains = <&spm MT8173_POWER_DOMAIN_MM>;
         clocks = <&mmsys CLK_MM_DISP_MERGE>;
     };
+
+    merge5: disp_vpp_merge5@1c110000 {
+        compatible = "mediatek,mt8195-disp-merge";
+        reg = <0 0x1c110000 0 0x1000>;
+        interrupts = <GIC_SPI 507 IRQ_TYPE_LEVEL_HIGH 0>;
+        clocks = <&vdosys1 CLK_VDO1_VPP_MERGE4>,
+                 <&vdosys1 CLK_VDO1_MERGE4_DL_ASYNC>;
+        clock-names = "merge","merge_async";
+        power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
+        mediatek,gce-client-reg = <&gce1 SUBSYS_1c11XXXX 0x0000 0x1000>;
+        mediatek,merge-fifo-en = <1>;
+        resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE4_DL_ASYNC>;
+    };