ASoC: dt-bindings: qcom,q6asm: convert to dtschema

Convert Qualcomm Audio Stream Manager (Q6ASM) bindings to DT schema.

The original bindings documented:
1. APR service node with compatibles: "qcom,q6asm" and
   "qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>",
2. actual DAIs child node with compatible "qcom,q6asm-dais".

The conversion entirely drops (1) because the compatible is already
documented in bindings/soc/qcom/qcom,apr.yaml.  The
"qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>" on the other hand is not
used at all - neither in existing DTS, nor in downstream sources - so
versions seems to be fully auto-detectable.

Another change done in conversion is adding "iommus" property, which is
already used in DTS and Linux driver.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220910091428.50418-11-krzysztof.kozlowski@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/soc/qcom/qcom,apr.yaml

@@ -103,8 +103,12 @@ patternProperties:
         unevaluatedProperties: false
 
       dais:
-        # TODO: Waiting for Documentation/devicetree/bindings/sound/qcom,q6asm.txt
         type: object
+        oneOf:
+          - $ref: /schemas/sound/qcom,q6apm-dai.yaml#
+          - $ref: /schemas/sound/qcom,q6dsp-lpass-ports.yaml#
+          - $ref: /schemas/sound/qcom,q6asm-dais.yaml#
+        unevaluatedProperties: false
         description: Qualcomm DSP audio ports
 
       routing:

Documentation/devicetree/bindings/sound/qcom,q6asm-dais.yaml

+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,q6asm-dais.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Audio Stream Manager (Q6ASM)
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description:
+  Q6ASM is one of the APR audio services on Q6DSP. Each of its subnodes
+  represent a dai with board specific configuration.
+
+properties:
+  compatible:
+    enum:
+      - qcom,q6asm-dais
+
+  iommus:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^dai@[0-9]+$":
+    type: object
+    description:
+      Q6ASM Digital Audio Interface
+
+    properties:
+      reg:
+        maxItems: 1
+
+      direction:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1, 2]
+        description: |
+          The direction of the dai stream::
+           - Q6ASM_DAI_TX_RX (0) for both tx and rx
+           - Q6ASM_DAI_TX (1) for only tx (Capture/Encode)
+           - Q6ASM_DAI_RX (2) for only rx (Playback/Decode)
+
+      is-compress-dai:
+        type: boolean
+        description:
+          Compress offload dai.
+
+    dependencies:
+      is-compress-dai: ["direction"]
+
+    required:
+      - reg
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - "#sound-dai-cells"
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/qcom,apr.h>
+    #include <dt-bindings/sound/qcom,q6asm.h>
+
+    apr {
+        compatible = "qcom,apr-v2";
+        qcom,domain = <APR_DOMAIN_ADSP>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        service@7 {
+            compatible = "qcom,q6asm";
+            reg = <APR_SVC_ASM>;
+            qcom,protection-domain = "avs/audio", "msm/adsp/audio_pd";
+
+            dais {
+                compatible = "qcom,q6asm-dais";
+                iommus = <&apps_smmu 0x1821 0x0>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                #sound-dai-cells = <1>;
+
+                dai@0 {
+                    reg = <0>;
+                };
+
+                dai@1 {
+                    reg = <1>;
+                };
+
+                dai@2 {
+                    reg = <2>;
+                    is-compress-dai;
+                    direction = <1>;
+                };
+            };
+        };
+    };

Documentation/devicetree/bindings/sound/qcom,q6asm.txt

-Qualcomm Audio Stream Manager (Q6ASM) binding
-
-Q6ASM is one of the APR audio service on Q6DSP.
-Please refer to qcom,apr.txt for details of the common apr service bindings
-used by the apr service device.
-
-- but must contain the following property:
-
-- compatible:
-	Usage: required
-	Value type: <stringlist>
-	Definition: must be "qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>".
-		    Or "qcom,q6asm" where the version number can be queried
-		    from DSP.
-		    example "qcom,q6asm-v2.0"
-
-= ASM DAIs (Digital Audio Interface)
-"dais" subnode of the ASM node represents dai specific configuration
-
-- compatible:
-	Usage: required
-	Value type: <stringlist>
-	Definition: must be "qcom,q6asm-dais".
-
-- #sound-dai-cells
-	Usage: required
-	Value type: <u32>
-	Definition: Must be 1
-
-== ASM DAI is subnode of "dais" and represent a dai, it includes board specific
-configuration of each dai. Must contain the following properties.
-
-- reg
-	Usage: required
-	Value type: <u32>
-	Definition: Must be dai id
-
-- direction:
-	Usage: Required for Compress offload dais
-	Value type: <u32>
-	Definition: Specifies the direction of the dai stream
-			Q6ASM_DAI_TX_RX (0) for both tx and rx
-			Q6ASM_DAI_TX (1) for only tx (Capture/Encode)
-			Q6ASM_DAI_RX (2) for only rx (Playback/Decode)
-
-- is-compress-dai:
-	Usage: Required for Compress offload dais
-	Value type: <boolean>
-	Definition: present for Compress offload dais
-
-
-= EXAMPLE
-#include <dt-bindings/sound/qcom,q6asm.h>
-
-apr-service@7 {
-	compatible = "qcom,q6asm";
-	reg = <APR_SVC_ASM>;
-	q6asmdai: dais {
-		compatible = "qcom,q6asm-dais";
-		#address-cells = <1>;
-		#size-cells = <0>;
-		#sound-dai-cells = <1>;
-
-		dai@0 {
-			reg = <0>;
-			direction = <Q6ASM_DAI_RX>;
-			is-compress-dai;
-		};
-	};
-};