ALSA: hda: cs35l41: Support multiple load paths for firmware

To be able to support different firmwares and tuning
for different models, the driver needs to be able to
load a different firmware and coefficient file based
on its Subsystem ID.

The driver attempts to load the firmware in the
following order:

/lib/firmware/cirrus/cs35l41-dsp1-<fw-type>-<ssid>-dev<#>.wmfw
/lib/firmware/cirrus/cs35l41-dsp1-<fw-type>-<ssid>.wmfw
/lib/firmware/cirrus/cs35l41-dsp1-<fw-type>.wmfw

Signed-off-by: Stefan Binding <[e-mail]>
Signed-off-by: Vitaly Rodionov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/hda/cs35l41_hda.c

···
 
 static int cs35l41_request_firmware_file(struct cs35l41_hda *cs35l41,
 					 const struct firmware **firmware, char **filename,
-					 const char *dir, const char *filetype)
+					 const char *dir, const char *ssid, const char *amp_name,
+					 const char *filetype)
 {
 	const char * const dsp_name = cs35l41->cs_dsp.name;
 	char *s, c;
 	int ret = 0;
 
-	*filename = kasprintf(GFP_KERNEL, "%s%s-%s-%s.%s", dir, CS35L41_PART, dsp_name, "spk-prot",
-			      filetype);
+	if (ssid && amp_name)
+		*filename = kasprintf(GFP_KERNEL, "%s%s-%s-%s-%s-%s.%s", dir, CS35L41_PART,
+				      dsp_name, "spk-prot", ssid, amp_name,
+				      filetype);
+	else if (ssid)
+		*filename = kasprintf(GFP_KERNEL, "%s%s-%s-%s-%s.%s", dir, CS35L41_PART,
+				      dsp_name, "spk-prot", ssid, filetype);
+	else
+		*filename = kasprintf(GFP_KERNEL, "%s%s-%s-%s.%s", dir, CS35L41_PART,
+				      dsp_name, "spk-prot", filetype);
 
 	if (*filename == NULL)
 		return -ENOMEM;
···
 {
 	int ret;
 
-	/* cirrus/part-dspN-fwtype.wmfw */
+	/* try cirrus/part-dspN-fwtype-sub<-ampname>.wmfw */
 	ret = cs35l41_request_firmware_file(cs35l41, wmfw_firmware, wmfw_filename,
-					    CS35L41_FIRMWARE_ROOT, "wmfw");
+					    CS35L41_FIRMWARE_ROOT, cs35l41->acpi_subsystem_id,
+					    cs35l41->amp_name, "wmfw");
 	if (!ret) {
+		/* try cirrus/part-dspN-fwtype-sub<-ampname>.bin */
 		cs35l41_request_firmware_file(cs35l41, coeff_firmware, coeff_filename,
-					      CS35L41_FIRMWARE_ROOT, "bin");
+					      CS35L41_FIRMWARE_ROOT, cs35l41->acpi_subsystem_id,
+					      cs35l41->amp_name, "bin");
+		return 0;
+	}
+
+	/* try cirrus/part-dspN-fwtype-sub.wmfw */
+	ret = cs35l41_request_firmware_file(cs35l41, wmfw_firmware, wmfw_filename,
+					    CS35L41_FIRMWARE_ROOT, cs35l41->acpi_subsystem_id,
+					    NULL, "wmfw");
+	if (!ret) {
+		/* try cirrus/part-dspN-fwtype-sub<-ampname>.bin */
+		ret = cs35l41_request_firmware_file(cs35l41, coeff_firmware, coeff_filename,
+						    CS35L41_FIRMWARE_ROOT,
+						    cs35l41->acpi_subsystem_id,
+						    cs35l41->amp_name, "bin");
+		if (ret)
+			/* try cirrus/part-dspN-fwtype-sub.bin */
+			cs35l41_request_firmware_file(cs35l41, coeff_firmware, coeff_filename,
+						      CS35L41_FIRMWARE_ROOT,
+						      cs35l41->acpi_subsystem_id, NULL, "bin");
+		return 0;
+	}
+
+	/* fallback try cirrus/part-dspN-fwtype.wmfw */
+	ret = cs35l41_request_firmware_file(cs35l41, wmfw_firmware, wmfw_filename,
+					    CS35L41_FIRMWARE_ROOT, NULL, NULL, "wmfw");
+	if (!ret) {
+		/* fallback try cirrus/part-dspN-fwtype.bin */
+		cs35l41_request_firmware_file(cs35l41, coeff_firmware, coeff_filename,
+					      CS35L41_FIRMWARE_ROOT, NULL, NULL, "bin");
 		return 0;
 	}