1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/soundwire/dmi-quirks.c b/drivers/soundwire/dmi-quirks.c
new file mode 100644
index 000000000000..82061c1d9835
--- /dev/null
+++ b/drivers/soundwire/dmi-quirks.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+// Copyright(c) 2021 Intel Corporation.
+
+/*
+ * Soundwire DMI quirks
+ */
+
+#include <linux/device.h>
+#include <linux/dmi.h>
+#include <linux/soundwire/sdw.h>
+#include "bus.h"
+
+struct adr_remap {
+	u64 adr;
+	u64 remapped_adr;
+};
+
+/*
+ * HP Spectre 360 Convertible devices do not expose the correct _ADR
+ * in the DSDT.
+ * Remap the bad _ADR values to the ones reported by hardware
+ */
+static const struct adr_remap hp_spectre_360[] = {
+	{
+		0x000010025D070100,
+		0x000020025D071100
+	},
+	{
+		0x000110025d070100,
+		0x000120025D130800
+	},
+	{}
+};
+
+/*
+ * The initial version of the Dell SKU 0A3E did not expose the devices
+ * on the correct links.
+ */
+static const struct adr_remap dell_sku_0A3E[] = {
+	/* rt715 on link0 */
+	{
+		0x00020025d071100,
+		0x00021025d071500
+	},
+	/* rt711 on link1 */
+	{
+		0x000120025d130800,
+		0x000120025d071100,
+	},
+	/* rt1308 on link2 */
+	{
+		0x000220025d071500,
+		0x000220025d130800
+	},
+	{}
+};
+
+static const struct dmi_system_id adr_remap_quirk_table[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible"),
+		},
+		.driver_data = (void *)hp_spectre_360,
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "0A3E")
+		},
+		.driver_data = (void *)dell_sku_0A3E,
+	},
+	{}
+};
+
+u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr)
+{
+	const struct dmi_system_id *dmi_id;
+
+	/* check if any address remap quirk applies */
+	dmi_id = dmi_first_match(adr_remap_quirk_table);
+	if (dmi_id) {
+		struct adr_remap *map = dmi_id->driver_data;
+
+		for (map = dmi_id->driver_data; map->adr; map++) {
+			if (map->adr == addr) {
+				dev_dbg(bus->dev, "remapped _ADR 0x%llx as 0x%llx\n",
+					addr, map->remapped_adr);
+				addr = map->remapped_adr;
+				break;
+			}
+		}
+	}
+
+	return addr;
+}