[RESEND v2 1/4] ASoC: dt-bindings: wcd937x-sdw: Add static channel mapping support

[Mohammad Rafi Shaik <quic_mohs@xxxxxxxxxxx>]

Add static channel mapping between master and slave rx/tx ports for
Qualcomm wcd937x soundwire codec.

Currently, the channel mask for each soundwire port is hardcoded in the
wcd937x-sdw driver, and the same channel mask value is configured in the
soundwire master.

The Qualcomm boards like the QCM6490-IDP require different channel mask settings
for the soundwire master and slave ports.

With the introduction of the following channel mapping properties, it is now possible
to configure the master channel mask directly from the device tree.

The qcom,tx-channel-mapping property specifies the static channel mapping between the slave
and master tx ports in the order of slave port channels which is adc1, adc2, adc3, adc4,
dmic0, dmic1, mbhc, dmic2, dmic3, dmci4, dmic5, dmic6, dmic7.

The qcom,rx-channel-mapping property specifies static channel mapping between the slave
and master rx ports in the order of slave port channels which is hph_l, hph_r, clsh,
comp_l, comp_r, lo, dsd_r, dsd_l.

Signed-off-by: Mohammad Rafi Shaik <quic_mohs@xxxxxxxxxxx>
---
 .../bindings/sound/qcom,wcd937x-sdw.yaml      | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
index d3cf8f59cb23..a6bc9b391db0 100644
--- a/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
@@ -58,6 +58,38 @@ properties:
     items:
       enum: [1, 2, 3, 4, 5]
 
+  qcom,tx-channel-mapping:
+    description: |
+      Specifies static channel mapping between slave and master tx port
+      channels.
+      In the order of slave port channels which is adc1, adc2, adc3, adc4,
+      dmic0, dmic1, mbhc, dmic2, dmic3, dmci4, dmic5, dmic6, dmic7.
+      ch_mask1 ==> bit mask value 1
+      ch_mask2 ==> bit mask value 2
+      ch_mask3 ==> bit mask value 4
+      ch_mask4 ==> bit mask value 8
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    minItems: 8
+    maxItems: 13
+    items:
+      enum: [1, 2, 4, 8]
+
+  qcom,rx-channel-mapping:
+    description: |
+      Specifies static channels mapping between slave and master rx port
+      channels.
+      In the order of slave port channels, which is
+      hph_l, hph_r, clsh, comp_l, comp_r, lo, dsd_r, dsd_l.
+      ch_mask1 ==> bit mask value 1
+      ch_mask2 ==> bit mask value 2
+      ch_mask3 ==> bit mask value 4
+      ch_mask4 ==> bit mask value 8
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    minItems: 8
+    maxItems: 8
+    items:
+      enum: [1, 2, 4, 8]
+
 required:
   - compatible
   - reg
@@ -74,6 +106,8 @@ examples:
             compatible = "sdw20217010a00";
             reg = <0 4>;
             qcom,rx-port-mapping = <1 2 3 4 5>;
+            qcom,rx-channel-mapping =  /bits/ 8 <0x01 0x02 0x01 0x01 0x02
+                                                 0x01 0x01 0x02>;
         };
     };
 
@@ -85,6 +119,8 @@ examples:
             compatible = "sdw20217010a00";
             reg = <0 3>;
             qcom,tx-port-mapping = <2 2 3 4>;
+            qcom,tx-channel-mapping = /bits/ 8 <0x01 0x02 0x01 0x01 0x02 0x04
+                                                0x04 0x08 0x01 0x02 0x04 0x8>;
         };
     };
 
-- 
2.25.1