arm64: dts: qcom: sm8550-hdk: correct WCD9385 route and port mapping

Starting from SM8550, the TX ADC input soundwire port is offset by 1,
and uses the new SWR_INPUTx input ports, so replace the legacy
SWR_ADCx routes for SWR_INPUT0 & SWR_INPUT1 following the correct
TX Soundwire port mapping.

Add some comments on the routing for clarity.

Fixes: b5e25ded ("arm64: dts: qcom: sm8550: add support for the SM8550-HDK board")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240201-topic-sm8550-hdk8550-audio-fix-v1-1-aa526c9c91d5@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sm8550-hdk.dts

@@ -211,9 +211,9 @@ sound {
 				"AMIC1", "MIC BIAS1",
 				"AMIC2", "MIC BIAS2",
 				"AMIC5", "MIC BIAS4",
-				"TX SWR_ADC0", "ADC1_OUTPUT",
-				"TX SWR_ADC1", "ADC2_OUTPUT",
-				"TX SWR_ADC3", "ADC4_OUTPUT";
+				"TX SWR_INPUT0", "ADC1_OUTPUT",
+				"TX SWR_INPUT1", "ADC2_OUTPUT",
+				"TX SWR_INPUT1", "ADC4_OUTPUT";
 
 		wcd-playback-dai-link {
 			link-name = "WCD Playback";
@@ -1139,6 +1139,13 @@ wcd_rx: codec@0,4 {
 		compatible = "sdw20217010d00";
 		reg = <0 4>;
 
+		/*
+		 * WCD9385 RX Port 1 (HPH_L/R)      <=> SWR1 Port 1 (HPH_L/R)
+		 * WCD9385 RX Port 2 (CLSH)         <=> SWR1 Port 2 (CLSH)
+		 * WCD9385 RX Port 3 (COMP_L/R)     <=> SWR1 Port 3 (COMP_L/R)
+		 * WCD9385 RX Port 4 (LO)           <=> SWR1 Port 4 (LO)
+		 * WCD9385 RX Port 5 (DSD_L/R)      <=> SWR1 Port 5 (DSD_L/R)
+		 */
 		qcom,rx-port-mapping = <1 2 3 4 5>;
 	};
 };
@@ -1151,7 +1158,13 @@ wcd_tx: codec@0,3 {
 		compatible = "sdw20217010d00";
 		reg = <0 3>;
 
-		qcom,tx-port-mapping = <1 1 2 3>;
+		/*
+		 * WCD9385 TX Port 1 (ADC1,2)             <=> SWR2 Port 2 (TX SWR_INPUT 0,1,2,3)
+		 * WCD9385 TX Port 2 (ADC3,4)             <=> SWR2 Port 2 (TX SWR_INPUT 0,1,2,3)
+		 * WCD9385 TX Port 3 (DMIC0,1,2,3 & MBHC) <=> SWR2 Port 3 (TX SWR_INPUT 4,5,6,7)
+		 * WCD9385 TX Port 4 (DMIC4,5,6,7)        <=> SWR2 Port 4 (TX SWR_INPUT 8,9,10,11)
+		 */
+		qcom,tx-port-mapping = <2 2 3 4>;
 	};
 };