ASOC: SOF: pci: add ipc_type override for Intel IPC4 tests

Add a kernel module parameter for select the non-default IPC type.

This should only be used by developers with access to firmware and
topology files, typically Intel and partners.
Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220421163358.319489-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/core.c

@@ -358,6 +358,13 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
 	sdev->first_boot = true;
 	dev_set_drvdata(dev, sdev);
 
+	/* check IPC support */
+	if (!(BIT(plat_data->ipc_type) & plat_data->desc->ipc_supported_mask)) {
+		dev_err(dev, "ipc_type %d is not supported on this platform, mask is %#x\n",
+			plat_data->ipc_type, plat_data->desc->ipc_supported_mask);
+		return -EINVAL;
+	}
+
 	/* init ops, if necessary */
 	ret = sof_ops_init(sdev);
 	if (ret < 0)

sound/soc/sof/sof-pci-dev.c

@@ -40,6 +40,10 @@ static int sof_pci_debug;
 module_param_named(sof_pci_debug, sof_pci_debug, int, 0444);
 MODULE_PARM_DESC(sof_pci_debug, "SOF PCI debug options (0x0 all off)");
 
+static int sof_pci_ipc_type = -1;
+module_param_named(ipc_type, sof_pci_ipc_type, int, 0444);
+MODULE_PARM_DESC(ipc_type, "SOF IPC type (0): SOF, (1) Intel CAVS");
+
 static const char *sof_dmi_override_tplg_name;
 static bool sof_dmi_use_community_key;
 
@@ -206,6 +210,23 @@ int sof_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 
 	sof_pdata->ipc_type = desc->ipc_default;
 
+	if (sof_pci_ipc_type < 0) {
+		sof_pdata->ipc_type = desc->ipc_default;
+	} else {
+		dev_info(dev, "overriding default IPC %d to requested %d\n",
+			 desc->ipc_default, sof_pci_ipc_type);
+		if (sof_pci_ipc_type >= SOF_IPC_TYPE_COUNT) {
+			dev_err(dev, "invalid request value %d\n", sof_pci_ipc_type);
+			return -EINVAL;
+		}
+		if (!(BIT(sof_pci_ipc_type) & desc->ipc_supported_mask)) {
+			dev_err(dev, "invalid request value %d, supported mask is %#x\n",
+				sof_pci_ipc_type, desc->ipc_supported_mask);
+			return -EINVAL;
+		}
+		sof_pdata->ipc_type = sof_pci_ipc_type;
+	}
+
 	if (fw_filename) {
 		sof_pdata->fw_filename = fw_filename;