ASoC: SOF: amd: Compute file paths on firmware load

mainline inclusion
from mainline-v6.9-rc1

Commit 6c393eb ("ASoC: SOF: core: Implement IPC version fallback if
firmware files are missing") changed the order of some operations and
the firmware paths are not available anymore at snd_sof_probe() time.

Precisely, fw_filename_prefix is set by sof_select_ipc_and_paths() via

  plat_data->fw_filename_prefix = out_profile.fw_path;

but sof_init_environment() which calls this function was moved from
snd_sof_device_probe() to sof_probe_continue(). Moreover,
snd_sof_probe() was moved from sof_probe_continue() to
sof_init_environment(), but before the call to
sof_select_ipc_and_paths().

The problem here is that amd_sof_acp_probe() uses fw_filename_prefix to
compute fw_code_bin and fw_data_bin paths, and because the field is not
yet initialized, the paths end up containing (null):

snd_sof_amd_vangogh 0000:04:00.5: Direct firmware load for (null)/sof-vangogh-code.bin failed with error -2
snd_sof_amd_vangogh 0000:04:00.5: sof signed firmware code bin is missing
snd_sof_amd_vangogh 0000:04:00.5: error: failed to load DSP firmware -2
snd_sof_amd_vangogh: probe of 0000:04:00.5 failed with error -2

Move usage of fw_filename_prefix right before request_firmware() calls
in acp_sof_load_signed_firmware().

Fixes: 6c393eb ("ASoC: SOF: core: Implement IPC version fallback if firmware files are missing")
Signed-off-by: Cristian Ciocaltea <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
Link: https://msgid.link/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
(cherry picked from commit d9cacc1)
Signed-off-by: Wentao Guan <[email protected]>

sound/soc/sof/amd/acp-loader.c

@@ -229,29 +229,49 @@ int acp_sof_load_signed_firmware(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pdata *plat_data = sdev->pdata;
 	struct acp_dev_data *adata = plat_data->hw_pdata;
+	const char *fw_filename;
 	int ret;
 
-	ret = request_firmware(&sdev->basefw.fw, adata->fw_code_bin, sdev->dev);
+	fw_filename = kasprintf(GFP_KERNEL, "%s/%s",
+				plat_data->fw_filename_prefix,
+				adata->fw_code_bin);
+	if (!fw_filename)
+		return -ENOMEM;
+
+	ret = request_firmware(&sdev->basefw.fw, fw_filename, sdev->dev);
 	if (ret < 0) {
+		kfree(fw_filename);
 		dev_err(sdev->dev, "sof signed firmware code bin is missing\n");
 		return ret;
 	} else {
-		dev_dbg(sdev->dev, "request_firmware %s successful\n", adata->fw_code_bin);
+		dev_dbg(sdev->dev, "request_firmware %s successful\n", fw_filename);
 	}
+	kfree(fw_filename);
+
 	ret = snd_sof_dsp_block_write(sdev, SOF_FW_BLK_TYPE_IRAM, 0,
-				      (void *)sdev->basefw.fw->data, sdev->basefw.fw->size);
+				      (void *)sdev->basefw.fw->data,
+				      sdev->basefw.fw->size);
+
+	fw_filename = kasprintf(GFP_KERNEL, "%s/%s",
+				plat_data->fw_filename_prefix,
+				adata->fw_data_bin);
+	if (!fw_filename)
+		return -ENOMEM;
 
-	ret = request_firmware(&adata->fw_dbin, adata->fw_data_bin, sdev->dev);
+	ret = request_firmware(&adata->fw_dbin, fw_filename, sdev->dev);
 	if (ret < 0) {
+		kfree(fw_filename);
 		dev_err(sdev->dev, "sof signed firmware data bin is missing\n");
 		return ret;
 
 	} else {
-		dev_dbg(sdev->dev, "request_firmware %s successful\n", adata->fw_data_bin);
+		dev_dbg(sdev->dev, "request_firmware %s successful\n", fw_filename);
 	}
+	kfree(fw_filename);
 
 	ret = snd_sof_dsp_block_write(sdev, SOF_FW_BLK_TYPE_DRAM, 0,
-				      (void *)adata->fw_dbin->data, adata->fw_dbin->size);
+				      (void *)adata->fw_dbin->data,
+				      adata->fw_dbin->size);
 	return ret;
 }
 EXPORT_SYMBOL_NS(acp_sof_load_signed_firmware, SND_SOC_SOF_AMD_COMMON);

sound/soc/sof/amd/acp.c

@@ -494,7 +494,6 @@ EXPORT_SYMBOL_NS(amd_sof_acp_resume, SND_SOC_SOF_AMD_COMMON);
 int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 {
 	struct pci_dev *pci = to_pci_dev(sdev->dev);
-	struct snd_sof_pdata *plat_data = sdev->pdata;
 	struct acp_dev_data *adata;
 	const struct sof_amd_acp_desc *chip;
 	const struct dmi_system_id *dmi_id;
@@ -562,17 +561,15 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 	dmi_id = dmi_first_match(acp_sof_quirk_table);
 	if (dmi_id && dmi_id->driver_data) {
 		adata->fw_code_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
-						    "%s/sof-%s-code.bin",
-						    plat_data->fw_filename_prefix,
+						    "sof-%s-code.bin",
 						    chip->name);
 		if (!adata->fw_code_bin) {
 			ret = -ENOMEM;
 			goto free_ipc_irq;
 		}
 
 		adata->fw_data_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
-						    "%s/sof-%s-data.bin",
-						    plat_data->fw_filename_prefix,
+						    "sof-%s-data.bin",
 						    chip->name);
 		if (!adata->fw_data_bin) {
 			ret = -ENOMEM;