ASoC: wm_adsp: Add support for loading bin files without wmfw

A self-booted DSP may have a file of coefficients to apply to the device
even when there is no firmware to download.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230320112245.115720-7-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -850,8 +850,29 @@ static int wm_adsp_request_firmware_files(struct wm_adsp *dsp,
 		return 0;
 	}
 
-	if (dsp->wmfw_optional)
+	if (dsp->wmfw_optional) {
+		if (system_name) {
+			if (asoc_component_prefix)
+				wm_adsp_request_firmware_file(dsp, coeff_firmware, coeff_filename,
+							      cirrus_dir, system_name,
+							      asoc_component_prefix, "bin");
+
+			if (!*coeff_firmware)
+				wm_adsp_request_firmware_file(dsp, coeff_firmware, coeff_filename,
+							      cirrus_dir, system_name,
+							      NULL, "bin");
+		}
+
+		if (!*coeff_firmware)
+			wm_adsp_request_firmware_file(dsp, coeff_firmware, coeff_filename,
+						      "", NULL, NULL, "bin");
+
+		if (!*coeff_firmware)
+			wm_adsp_request_firmware_file(dsp, coeff_firmware, coeff_filename,
+						      cirrus_dir, NULL, NULL, "bin");
+
 		return 0;
+	}
 
 	adsp_err(dsp, "Failed to request firmware <%s>%s-%s-%s<-%s<%s>>.wmfw\n",
 		 cirrus_dir, dsp->part, dsp->fwf_name, wm_adsp_fw[dsp->fw].file,