ASoC: tas2783A: fw loading for devices without pci bus

Currently, there is compilation error when the
CONFIG_PCI is not enabled which is used for creating
firmware name. This commit address this issue by adding
fallback mechanism to construct unqiue name by using
SounWire slave's link and unique ids alone when the
CONFIG_PCI is not available.

Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-kbuild-all/[e-mail]/
Signed-off-by: Niranjan H Y <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/tas2783-sdw.c

···
 #include <linux/soundwire/sdw.h>
 #include <linux/soundwire/sdw_registers.h>
 #include <linux/soundwire/sdw_type.h>
+#if IS_ENABLED(CONFIG_PCI)
 #include <linux/pci.h>
+#endif
 #include <sound/sdw.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
···
 	RUNTIME_PM_OPS(tas2783_sdca_dev_suspend, tas2783_sdca_dev_resume, NULL)
 };
 
-static struct pci_dev *tas_get_pci_dev(struct sdw_slave *peripheral)
+static void tas_generate_fw_name(struct sdw_slave *slave, char *name, size_t size)
 {
-	struct device *dev = &peripheral->dev;
+	struct sdw_bus *bus = slave->bus;
+	u8 unique_id = slave->id.unique_id;
+	bool pci_found = false;
+#if IS_ENABLED(CONFIG_PCI)
+	struct device *dev = &slave->dev;
+	struct pci_dev *pci = NULL;
 
-	for (; dev; dev = dev->parent)
-		if (dev->bus == &pci_bus_type)
-			return to_pci_dev(dev);
+	for (; dev; dev = dev->parent) {
+		if (dev->bus == &pci_bus_type) {
+			pci = to_pci_dev(dev);
+			scnprintf(name, size, "%04X-%1X-%1X.bin",
+				  pci->subsystem_device, bus->link_id, unique_id);
+			pci_found = true;
+			break;
+		}
+	}
+#endif
 
-	return NULL;
+	if (!pci_found)
+		scnprintf(name, size, "tas2783-%1X-%1X.bin",
+			  bus->link_id, unique_id);
 }
 
 static s32 tas_io_init(struct device *dev, struct sdw_slave *slave)
 {
-	struct pci_dev *pci;
-	struct sdw_bus *bus;
 	struct tas2783_prv *tas_dev = dev_get_drvdata(dev);
 	s32 ret;
 	u8 unique_id = tas_dev->sdw_peripheral->id.unique_id;
···
 	if (tas_dev->hw_init)
 		return 0;
 
-	pci = tas_get_pci_dev(slave);
-	if (!pci) {
-		dev_err(dev, "pci device id can't be read");
-		return -EINVAL;
-	}
-
-	bus = slave->bus;
 	tas_dev->fw_dl_task_done = false;
 	tas_dev->fw_dl_success = false;
 
···
 	}
 	usleep_range(2000, 2200);
 
-	/* subsystem_id-link_id-unique_id */
-	scnprintf(tas_dev->rca_binaryname, sizeof(tas_dev->rca_binaryname),
-		  "%04X-%1X-%1X.bin", pci->subsystem_device, bus->link_id,
-		  unique_id);
+	tas_generate_fw_name(slave, tas_dev->rca_binaryname,
+			     sizeof(tas_dev->rca_binaryname));
 
 	ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT,
 				      tas_dev->rca_binaryname, tas_dev->dev,