[PATCH v3 1/9] dt-bindings: display/msm: split qcom,mdss bindings

[Dmitry Baryshkov]

Split Mobile Display SubSystem (MDSS) root node bindings to the separate
yaml file. Changes to the existing (txt) schema:
 - Added optional "vbif_nrt_phys" region used by msm8996
 - Made "bus" and "vsync" clocks optional (they are not used by some
   platforms)
 - Added (optional) "core" clock added recently to the mdss driver
 - Added optional resets property referencing MDSS reset
 - Defined child nodes pointing to corresponding reference schema.
 - Dropped the "lut" clock. It was added to the schema by mistake (it is
   a part of mdp4 schema, not the mdss).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 .../devicetree/bindings/display/msm/mdp5.txt  |  30 +---
 .../devicetree/bindings/display/msm/mdss.yaml | 161 ++++++++++++++++++
 2 files changed, 162 insertions(+), 29 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/msm/mdss.yaml

diff --git a/Documentation/devicetree/bindings/display/msm/mdp5.txt b/Documentation/devicetree/bindings/display/msm/mdp5.txt
index 43d11279c925..65d03c58dee6 100644
--- a/Documentation/devicetree/bindings/display/msm/mdp5.txt
+++ b/Documentation/devicetree/bindings/display/msm/mdp5.txt
@@ -2,37 +2,9 @@ Qualcomm adreno/snapdragon MDP5 display controller
 
 Description:
 
-This is the bindings documentation for the Mobile Display Subsytem(MDSS) that
-encapsulates sub-blocks like MDP5, DSI, HDMI, eDP etc, and the MDP5 display
+This is the bindings documentation for the MDP5 display
 controller found in SoCs like MSM8974, APQ8084, MSM8916, MSM8994 and MSM8996.
 
-MDSS:
-Required properties:
-- compatible:
-  * "qcom,mdss" - MDSS
-- reg: Physical base address and length of the controller's registers.
-- reg-names: The names of register regions. The following regions are required:
-  * "mdss_phys"
-  * "vbif_phys"
-- interrupts: The interrupt signal from MDSS.
-- interrupt-controller: identifies the node as an interrupt controller.
-- #interrupt-cells: specifies the number of cells needed to encode an interrupt
-  source, should be 1.
-- power-domains: a power domain consumer specifier according to
-  Documentation/devicetree/bindings/power/power_domain.txt
-- clocks: device clocks. See ../clocks/clock-bindings.txt for details.
-- clock-names: the following clocks are required.
-  * "iface"
-  * "bus"
-  * "vsync"
-- #address-cells: number of address cells for the MDSS children. Should be 1.
-- #size-cells: Should be 1.
-- ranges: parent bus address space is the same as the child bus address space.
-
-Optional properties:
-- clock-names: the following clocks are optional:
-  * "lut"
-
 MDP5:
 Required properties:
 - compatible:
diff --git a/Documentation/devicetree/bindings/display/msm/mdss.yaml b/Documentation/devicetree/bindings/display/msm/mdss.yaml
new file mode 100644
index 000000000000..6a8ec8310f6f
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/msm/mdss.yaml
@@ -0,0 +1,161 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/msm/mdss.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Mobile Display SubSystem (MDSS)
+
+maintainers:
+  - Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
+  - Rob Clark <robdclark at gmail.com>
+
+description:
+  This is the bindings documentation for the Mobile Display Subsytem(MDSS) that
+  encapsulates sub-blocks like MDP5, DSI, HDMI, eDP, etc.
+
+properties:
+  compatible:
+    enum:
+      - qcom,mdss
+
+  reg:
+    minItems: 2
+    maxItems: 3
+
+  reg-names:
+    minItems: 2
+    items:
+      - const: mdss_phys
+      - const: vbif_phys
+      - const: vbif_nrt_phys
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller:
+    true
+
+  "#interrupt-cells":
+    const: 1
+
+  power-domains:
+    maxItems: 1
+    description: |
+      The MDSS power domain provided by GCC
+
+  clocks:
+    minItems: 1
+    maxItems: 4
+
+  clock-names:
+    minItems: 1
+    maxItems: 4
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  ranges:
+    true
+
+  resets:
+    items:
+      - description: MDSS_CORE reset
+
+oneOf:
+  - properties:
+      clocks:
+        minItems: 3
+        maxItems: 4
+
+      clock-names:
+        minItems: 3
+        items:
+          - const: iface
+          - const: bus
+          - const: vsync
+          - const: core
+  - properties:
+      clocks:
+        minItems: 1
+        maxItems: 2
+
+      clock-names:
+        minItems: 1
+        items:
+          - const: iface
+          - const: core
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+  - power-domains
+  - clocks
+  - clock-names
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+
+patternProperties:
+  "^mdp@[1-9a-f][0-9a-f]*$":
+    type: object
+    # TODO: add reference once the mdp5 is converted
+
+  "^dsi@[1-9a-f][0-9a-f]*$":
+    $ref: dsi-controller-main.yaml#
+
+  "^dsi-phy@[1-9a-f][0-9a-f]*$":
+    oneOf:
+      - $ref: dsi-phy-28nm.yaml#
+      - $ref: dsi-phy-20nm.yaml#
+      - $ref: dsi-phy-14nm.yaml#
+      - $ref: dsi-phy-10nm.yaml#
+      - $ref: dsi-phy-7nm.yaml#
+
+  "^hdmi-phy@[1-9a-f][0-9a-f]*$":
+    oneOf:
+      - $ref: /schemas/phy/qcom,hdmi-phy-qmp.yaml#
+      - $ref: /schemas/phy/qcom,hdmi-phy-other.yaml#
+
+  "^hdmi-tx@[1-9a-f][0-9a-f]*$":
+    $ref: hdmi.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-msm8916.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    mdss at 1a00000 {
+      compatible = "qcom,mdss";
+      reg = <0x1a00000 0x1000>,
+            <0x1ac8000 0x3000>;
+      reg-names = "mdss_phys", "vbif_phys";
+
+      power-domains = <&gcc MDSS_GDSC>;
+
+      clocks = <&gcc GCC_MDSS_AHB_CLK>,
+               <&gcc GCC_MDSS_AXI_CLK>,
+               <&gcc GCC_MDSS_VSYNC_CLK>;
+      clock-names = "iface",
+                    "bus",
+                    "vsync";
+
+      interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
+
+      interrupt-controller;
+      #interrupt-cells = <1>;
+
+      #address-cells = <1>;
+      #size-cells = <1>;
+      ranges;
+
+    };
+...
-- 
2.35.1