3 files changed, 29 insertions, 6 deletions

diff --git a/sound/soc/sdca/sdca_device.c b/sound/soc/sdca/sdca_device.c
index 0244cdcdd109..4798ce2c8f0b 100644
--- a/sound/soc/sdca/sdca_device.c
+++ b/sound/soc/sdca/sdca_device.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/dmi.h>
 #include <linux/module.h>
 #include <linux/property.h>
 #include <linux/soundwire/sdw.h>
@@ -55,11 +56,30 @@ static bool sdca_device_quirk_rt712_vb(struct sdw_slave *slave)
 	return false;
 }
 
+static bool sdca_device_quirk_skip_func_type_patching(struct sdw_slave *slave)
+{
+	const char *vendor, *sku;
+
+	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+	sku = dmi_get_system_info(DMI_PRODUCT_SKU);
+
+	if (vendor && sku &&
+	    !strcmp(vendor, "Dell Inc.") &&
+	    (!strcmp(sku, "0C62") || !strcmp(sku, "0C63") || !strcmp(sku, "0C6B")) &&
+	    slave->sdca_data.interface_revision == 0x061c &&
+	    slave->id.mfg_id == 0x01fa && slave->id.part_id == 0x4243)
+		return true;
+
+	return false;
+}
+
 bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk)
 {
 	switch (quirk) {
 	case SDCA_QUIRKS_RT712_VB:
 		return sdca_device_quirk_rt712_vb(slave);
+	case SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING:
+		return sdca_device_quirk_skip_func_type_patching(slave);
 	default:
 		break;
 	}
diff --git a/sound/soc/sdca/sdca_functions.c b/sound/soc/sdca/sdca_functions.c
index 050f7338aca9..ea793869c038 100644
--- a/sound/soc/sdca/sdca_functions.c
+++ b/sound/soc/sdca/sdca_functions.c
@@ -89,6 +89,7 @@ static int find_sdca_function(struct acpi_device *adev, void *data)
 {
 	struct fwnode_handle *function_node = acpi_fwnode_handle(adev);
 	struct sdca_device_data *sdca_data = data;
+	struct sdw_slave *slave = container_of(sdca_data, struct sdw_slave, sdca_data);
 	struct device *dev = &adev->dev;
 	struct fwnode_handle *control5; /* used to identify function type */
 	const char *function_name;
@@ -136,11 +137,13 @@ static int find_sdca_function(struct acpi_device *adev, void *data)
 		return ret;
 	}
 
-	ret = patch_sdca_function_type(sdca_data->interface_revision, &function_type);
-	if (ret < 0) {
-		dev_err(dev, "SDCA version %#x invalid function type %d\n",
-			sdca_data->interface_revision, function_type);
-		return ret;
+	if (!sdca_device_quirk_match(slave, SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING)) {
+		ret = patch_sdca_function_type(sdca_data->interface_revision, &function_type);
+		if (ret < 0) {
+			dev_err(dev, "SDCA version %#x invalid function type %d\n",
+				sdca_data->interface_revision, function_type);
+			return ret;
+		}
 	}
 
 	function_name = get_sdca_function_name(function_type);
diff --git a/sound/soc/sdca/sdca_regmap.c b/sound/soc/sdca/sdca_regmap.c
index c41c67c2204a..ff1f8fe2a39b 100644
--- a/sound/soc/sdca/sdca_regmap.c
+++ b/sound/soc/sdca/sdca_regmap.c
@@ -196,7 +196,7 @@ int sdca_regmap_mbq_size(struct sdca_function_data *function, unsigned int reg)
 
 	control = function_find_control(function, reg);
 	if (!control)
-		return false;
+		return -EINVAL;
 
 	return clamp_val(control->nbits / BITS_PER_BYTE, sizeof(u8), sizeof(u32));
 }