ASoC: qcom: add Surface Pro 11 Golden v33 protected playback

Documentation/devicetree/bindings/sound/qcom,sm8250.yaml

@@ -29,6 +29,9 @@ properties:
               - qcom,sm8650-sndcard
               - qcom,sm8750-sndcard
           - const: qcom,sm8450-sndcard
+      - items:
+          - const: microsoft,denali-sndcard
+          - const: qcom,x1e80100-sndcard
       - enum:
           - dell,xps13-9345-sndcard
           - fairphone,fp4-sndcard

Documentation/devicetree/bindings/sound/qcom,wsa8840.yaml

@@ -40,8 +40,39 @@ properties:
     minItems: 6
     maxItems: 6
 
+  qcom,enable-cps:
+    type: boolean
+    description: Enable the dedicated CPS SoundWire source DAI on data port 6.
+
+  qcom,cps-offset1:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 255
+    description: |
+      Slave-only SoundWire DP6 OffsetCtrl1 override for CPS. This does not
+      change the physical master-port schedule selected by qcom,port-mapping.
+
+  qcom,visense-channel-mask:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 255
+    description: |
+      Native WSA data-port-5 channel-enable mask for the VISENSE protection
+      sidechain. If absent, the codec default is used.
+
+  qcom,speaker-load-ohms:
+    enum: [4, 8]
+    description: |
+      Nominal speaker load impedance in ohms. A 4-ohm load selects the
+      matching PA gain and PBR thresholds when the amplifier reports a 2S
+      VPHX supply. If absent, the existing 8-ohm defaults are retained.
+
   '#sound-dai-cells':
-    const: 0
+    enum: [0, 1]
+    description: |
+      Zero selects the legacy single speaker-playback DAI. With one cell,
+      DAI 0 is speaker playback, DAI 1 is the render-coupled VISENSE
+      protection-feedback sidechain, and DAI 2 is the dedicated CPS feedback
+      sidechain when qcom,enable-cps is present.
 
   vdd-1p8-supply: true
   vdd-io-supply: true
@@ -75,7 +106,7 @@ examples:
             pinctrl-names = "default";
             pinctrl-0 = <&spkr_2_sd_n_active>;
             powerdown-gpios = <&lpass_tlmm 18 GPIO_ACTIVE_LOW>;
-            #sound-dai-cells = <0>;
+            #sound-dai-cells = <1>;
             sound-name-prefix = "SpkrRight";
             vdd-1p8-supply = <&vreg_l15b_1p8>;
             vdd-io-supply = <&vreg_l3g_1p2>;

arch/arm64/boot/dts/qcom/x1-microsoft-denali.dtsi

@@ -307,7 +307,8 @@
 	};
 
 	sound {
-		compatible = "qcom,x1e80100-sndcard";
+		compatible = "microsoft,denali-sndcard",
+			     "qcom,x1e80100-sndcard";
 		model = "X1E80100-Microsoft-Surface-Pro-11";
 		audio-routing = "SpkrLeft IN", "WSA WSA_SPK1 OUT",
 				"SpkrRight IN", "WSA WSA_SPK2 OUT",
@@ -318,7 +319,7 @@
 			link-name = "WSA Playback";
 
 			codec {
-				sound-dai = <&left_spkr>, <&right_spkr>,
+				sound-dai = <&left_spkr 0>, <&right_spkr 0>,
 					    <&swr0 0>, <&lpass_wsamacro 0>;
 			};
 
@@ -331,6 +332,51 @@
 			};
 		};
 
+		wsa-vi-dai-link {
+			link-name = "WSA VI Protection";
+
+			/*
+			 * One two-channel Windows-equivalent feedback transport:
+			 * amplifier VISENSE ports 10/11 -> WSA macro VI ->
+			 * SoundWire DIN0 -> AudioReach WSA TX0.
+			 */
+			codec {
+				sound-dai = <&left_spkr 1>, <&right_spkr 1>,
+					    <&swr0 9>, <&lpass_wsamacro 2>;
+			};
+
+			cpu {
+				sound-dai = <&q6apmbedai WSA_CODEC_DMA_TX_0>;
+			};
+
+			platform {
+				sound-dai = <&q6apm>;
+			};
+		};
+
+		wsa-cps-dai-link {
+			link-name = "WSA CPS Protection";
+
+			/*
+			 * Dedicated CPS sidechain: both WSA8845 DP6 sources share
+			 * physical SoundWire master port 13. swr0 DAI 10 is only
+			 * the independent ASoC/SoundWire stream handle; qcom,port-mapping
+			 * below remains authoritative for the physical master ports.
+			 */
+			codec {
+				sound-dai = <&left_spkr 2>, <&right_spkr 2>,
+					    <&swr0 10>, <&lpass_wsamacro 4>;
+			};
+
+			cpu {
+				sound-dai = <&q6apmbedai WSA_CODEC_DMA_TX_1>;
+			};
+
+			platform {
+				sound-dai = <&q6apm>;
+			};
+		};
+
 		va-dai-link {
 			link-name = "VA Capture";
 
@@ -1075,23 +1121,31 @@
 		compatible = "sdw20217020400";
 		reg = <0 0>;
 		reset-gpios = <&lpass_tlmm 12 GPIO_ACTIVE_LOW>;
-		#sound-dai-cells = <0>;
+		#sound-dai-cells = <1>;
 		sound-name-prefix = "SpkrLeft";
 		vdd-1p8-supply = <&vreg_l15b_1p8>;
 		vdd-io-supply = <&vreg_l12b_1p2>;
 		qcom,port-mapping = <1 2 3 7 10 13>;
+		qcom,speaker-load-ohms = <4>;
+		qcom,visense-channel-mask = <3>;
+		qcom,enable-cps;
+		qcom,cps-offset1 = <0>;
 	};
 
 	/* WSA8845, Right Speaker */
 	right_spkr: speaker@0,1 {
 		compatible = "sdw20217020400";
 		reg = <0 1>;
 		reset-gpios = <&lpass_tlmm 12 GPIO_ACTIVE_LOW>;
-		#sound-dai-cells = <0>;
+		#sound-dai-cells = <1>;
 		sound-name-prefix = "SpkrRight";
 		vdd-1p8-supply = <&vreg_l15b_1p8>;
 		vdd-io-supply = <&vreg_l12b_1p2>;
 		qcom,port-mapping = <4 5 6 7 11 13>;
+		qcom,speaker-load-ohms = <4>;
+		qcom,visense-channel-mask = <3>;
+		qcom,enable-cps;
+		qcom,cps-offset1 = <25>;
 	};
 };
 

drivers/soc/qcom/apr.c

@@ -74,15 +74,35 @@ int apr_send_pkt(struct apr_device *adev, struct apr_pkt *pkt)
 }
 EXPORT_SYMBOL_GPL(apr_send_pkt);
 
-void gpr_free_port(gpr_port_t *port)
+static void pkt_router_svc_put(struct pkt_router_svc *svc)
+{
+	if (refcount_dec_and_test(&svc->callback_refs))
+		complete(&svc->callbacks_drained);
+}
+
+static void pkt_router_svc_remove(struct pkt_router_svc *svc)
 {
-	struct packet_router *gpr = port->pr;
+	struct packet_router *pr = svc->pr;
 	unsigned long flags;
 
-	spin_lock_irqsave(&gpr->svcs_lock, flags);
-	idr_remove(&gpr->svcs_idr, port->id);
-	spin_unlock_irqrestore(&gpr->svcs_lock, flags);
+	spin_lock_irqsave(&pr->svcs_lock, flags);
+	idr_remove(&pr->svcs_idr, svc->id);
+	spin_unlock_irqrestore(&pr->svcs_lock, flags);
+
+	if (!refcount_dec_and_test(&svc->callback_refs))
+		wait_for_completion(&svc->callbacks_drained);
+}
 
+/**
+ * gpr_free_port() - unregister a dynamic GPR port after callbacks drain
+ * @port: dynamic port returned by gpr_alloc_port()
+ *
+ * Context: process context, and never from @port's own callback.
+ */
+void gpr_free_port(gpr_port_t *port)
+{
+	might_sleep();
+	pkt_router_svc_remove(port);
 	kfree(port);
 }
 EXPORT_SYMBOL_GPL(gpr_free_port);
@@ -105,6 +125,8 @@ gpr_port_t *gpr_alloc_port(struct apr_device *gdev, struct device *dev,
 	svc->priv = priv;
 	svc->dev = dev;
 	spin_lock_init(&svc->lock);
+	refcount_set(&svc->callback_refs, 1);
+	init_completion(&svc->callbacks_drained);
 
 	spin_lock(&pr->svcs_lock);
 	id = idr_alloc_cyclic(&pr->svcs_idr, svc, GPR_DYNAMIC_PORT_START,
@@ -191,7 +213,7 @@ static int apr_do_rx_callback(struct packet_router *apr, struct apr_rx_buf *abuf
 {
 	uint16_t hdr_size, msg_type, ver, svc_id;
 	struct pkt_router_svc *svc;
-	struct apr_device *adev;
+	struct apr_device *adev = NULL;
 	struct apr_driver *adrv = NULL;
 	struct apr_resp_pkt resp;
 	struct apr_hdr *hdr;
@@ -232,13 +254,17 @@ static int apr_do_rx_callback(struct packet_router *apr, struct apr_rx_buf *abuf
 	svc_id = hdr->dest_svc;
 	spin_lock_irqsave(&apr->svcs_lock, flags);
 	svc = idr_find(&apr->svcs_idr, svc_id);
+	if (svc && !refcount_inc_not_zero(&svc->callback_refs))
+		svc = NULL;
 	if (svc && svc->dev->driver) {
 		adev = svc_to_apr_device(svc);
 		adrv = to_apr_driver(adev->dev.driver);
 	}
 	spin_unlock_irqrestore(&apr->svcs_lock, flags);
 
 	if (!adrv || !adev) {
+		if (svc)
+			pkt_router_svc_put(svc);
 		dev_err(apr->dev, "APR: service is not registered (%d)\n",
 			svc_id);
 		return -EINVAL;
@@ -255,6 +281,7 @@ static int apr_do_rx_callback(struct packet_router *apr, struct apr_rx_buf *abuf
 		resp.payload = buf + hdr_size;
 
 	adrv->callback(adev, &resp);
+	pkt_router_svc_put(svc);
 
 	return 0;
 }
@@ -298,6 +325,8 @@ static int gpr_do_rx_callback(struct packet_router *gpr, struct apr_rx_buf *abuf
 
 	spin_lock_irqsave(&gpr->svcs_lock, flags);
 	svc = idr_find(&gpr->svcs_idr, hdr->dest_port);
+	if (svc && !refcount_inc_not_zero(&svc->callback_refs))
+		svc = NULL;
 	spin_unlock_irqrestore(&gpr->svcs_lock, flags);
 
 	if (!svc) {
@@ -308,6 +337,7 @@ static int gpr_do_rx_callback(struct packet_router *gpr, struct apr_rx_buf *abuf
 
 	if (svc->callback)
 		svc->callback(&resp, svc->priv, 0);
+	pkt_router_svc_put(svc);
 
 	return 0;
 }
@@ -378,13 +408,10 @@ static void apr_device_remove(struct device *dev)
 {
 	struct apr_device *adev = to_apr_device(dev);
 	struct apr_driver *adrv = to_apr_driver(dev->driver);
-	struct packet_router *apr = dev_get_drvdata(adev->dev.parent);
 
+	pkt_router_svc_remove(&adev->svc);
 	if (adrv->remove)
 		adrv->remove(adev);
-	spin_lock(&apr->svcs_lock);
-	idr_remove(&apr->svcs_idr, adev->svc.id);
-	spin_unlock(&apr->svcs_lock);
 }
 
 static int apr_uevent(const struct device *dev, struct kobj_uevent_env *env)
@@ -428,6 +455,8 @@ static int apr_add_device(struct device *dev, struct device_node *np,
 	svc->priv = adev;
 	svc->dev = dev;
 	spin_lock_init(&svc->lock);
+	refcount_set(&svc->callback_refs, 1);
+	init_completion(&svc->callbacks_drained);
 
 	adev->domain_id = domain_id;
 
@@ -458,26 +487,32 @@ static int apr_add_device(struct device *dev, struct device_node *np,
 	spin_unlock(&apr->svcs_lock);
 	if (ret < 0) {
 		dev_err(dev, "idr_alloc failed: %d\n", ret);
-		goto out;
+		goto free_adev;
 	}
 
 	/* Protection domain is optional, it does not exist on older platforms */
 	ret = of_property_read_string_index(np, "qcom,protection-domain",
 					    1, &adev->service_path);
 	if (ret < 0 && ret != -EINVAL) {
 		dev_err(dev, "Failed to read second value of qcom,protection-domain\n");
-		goto out;
+		goto remove_svc;
 	}
 
 	dev_info(dev, "Adding APR/GPR dev: %s\n", dev_name(&adev->dev));
 
 	ret = device_register(&adev->dev);
 	if (ret) {
 		dev_err(dev, "device_register failed: %d\n", ret);
+		pkt_router_svc_remove(svc);
 		put_device(&adev->dev);
 	}
 
-out:
+	return ret;
+
+remove_svc:
+	pkt_router_svc_remove(svc);
+free_adev:
+	kfree(adev);
 	return ret;
 }
 

drivers/soundwire/bus.h

@@ -117,6 +117,8 @@ int sdw_find_col_index(int col);
  * @ch_mask: Channel mask
  * @transport_params: Transport parameters
  * @port_params: Port parameters
+ * @transport_params_override_mask: Bitmask of per-slave transport overrides
+ * @transport_params_override: Per-slave transport override values
  * @port_node: List node for Master or Slave port_list
  * @lane: Which lane is used
  *
@@ -128,6 +130,8 @@ struct sdw_port_runtime {
 	int ch_mask;
 	struct sdw_transport_params transport_params;
 	struct sdw_port_params port_params;
+	unsigned int transport_params_override_mask;
+	struct sdw_transport_params transport_params_override;
 	struct list_head port_node;
 	unsigned int lane;
 };