ASoC: SOF: Intel: use sof_sdw as default SDW machine driver

If there is no SoundWire machine matches the existing acpi match table,
get the required machine date from the acpi table and construct the
link adrs and endpoints. Pass the data to the default Intel SoundWire
machine driver. And we don't need to add new item to the acpi match
table in common cases.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

sound/soc/sof/intel/hda.c

@@ -26,13 +26,15 @@
 #include <sound/intel-dsp-config.h>
 #include <sound/intel-nhlt.h>
 #include <sound/soc-acpi-intel-ssp-common.h>
+#include <sound/soc_sdw_utils.h>
 #include <sound/sof.h>
 #include <sound/sof/xtensa.h>
 #include <sound/hda-mlink.h>
 #include "../sof-audio.h"
 #include "../sof-pci-dev.h"
 #include "../ops.h"
 #include "../ipc4-topology.h"
+#include "../../intel/common/sof-function-topology-lib.h"
 #include "hda.h"
 
 #include <trace/events/sof_intel.h>
@@ -1117,14 +1119,145 @@ static void hda_generic_machine_select(struct snd_sof_dev *sdev,
 
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
 
+static bool is_endpoint_present(struct sdw_slave *sdw_device,
+				struct asoc_sdw_codec_info *dai_info, int dai_type)
+{
+	int i;
+
+	for (i = 0; i < sdw_device->sdca_data.num_functions; i++) {
+		if (dai_type == dai_info->dais[i].dai_type)
+			return true;
+	}
+	dev_dbg(&sdw_device->dev, "Endpoint DAI type %d not found\n", dai_type);
+	return false;
+}
+
+static struct snd_soc_acpi_adr_device *find_acpi_adr_device(struct device *dev,
+							    struct sdw_slave *sdw_device,
+							    struct snd_soc_acpi_link_adr *link,
+							    int *amp_index)
+{
+	struct snd_soc_acpi_adr_device *adr_dev;
+	int index = link->num_adr;
+	int ep_index = 0;
+	int i, j;
+
+	link->mask = BIT(sdw_device->bus->link_id);
+	/* index is 0 based, we need allocate index + 1 for the array size */
+	if (!index)
+		adr_dev = devm_kzalloc(dev, sizeof(*adr_dev), GFP_KERNEL);
+	else
+		adr_dev = devm_krealloc(dev, (struct snd_soc_acpi_adr_device *)link->adr_d,
+					(index + 1) * sizeof(*adr_dev), GFP_KERNEL);
+
+	if (!adr_dev)
+		return NULL;
+
+	for (i = 0; i < asoc_sdw_get_codec_info_list_count(); i++) {
+		struct snd_soc_acpi_endpoint *endpoints;
+		int amp_group_id = 1;
+
+		if (sdw_device->id.part_id != codec_info_list[i].part_id)
+			continue;
+
+		endpoints = devm_kzalloc(dev, codec_info_list[i].dai_num *
+					 sizeof(struct snd_soc_acpi_endpoint), GFP_KERNEL);
+
+		/* Get name_prefix from codec_info_list[] */
+		adr_dev[index].name_prefix = devm_kasprintf(dev, GFP_KERNEL, "%s",
+							    codec_info_list[i].name_prefix);
+		for (j = 0; j < codec_info_list[i].dai_num; j++) {
+			/* Check if the endpoint is present by the SDCA DisCo table */
+			if (!is_endpoint_present(sdw_device, &codec_info_list[i],
+						 codec_info_list[i].dais[j].dai_type))
+				continue;
+
+			endpoints[ep_index].num = ep_index;
+			if (codec_info_list[i].dais[j].dai_type == SOC_SDW_DAI_TYPE_AMP) {
+				/* Assume all amp are aggregated */
+				endpoints[ep_index].aggregated = 1;
+				endpoints[ep_index].group_id = amp_group_id;
+				endpoints[ep_index].group_position = *amp_index;
+				/* Set group id = 2 for feedback capture endpoint */
+				amp_group_id++;
+			} else {
+				endpoints[ep_index].aggregated = 0;
+				endpoints[ep_index].group_id = 0;
+				endpoints[ep_index].group_position = 0;
+			}
+			ep_index++;
+		}
+		adr_dev[index].endpoints = endpoints;
+		adr_dev[index].num_endpoints = ep_index;
+		break;
+	}
+
+	if (i == asoc_sdw_get_codec_info_list_count()) {
+		dev_err(dev, "part id %#x is not supported\n", sdw_device->id.part_id);
+		return NULL;
+	}
+
+	adr_dev[index].adr = ((u64)sdw_device->id.class_id & 0xFF) |
+			((u64)sdw_device->id.part_id & 0xFFFF) << 8 |
+			((u64)sdw_device->id.mfg_id & 0xFFFF) << 24 |
+			((u64)(sdw_device->id.unique_id & 0xF) << 40) |
+			((u64)(sdw_device->id.sdw_version & 0xF) << 44) |
+			((u64)(sdw_device->bus->link_id & 0xF) << 48);
+
+	/*
+	 * The name_prefix comes from codec_info_list which has a name_prefix per codec.
+	 * And we need to give a unique name_prefix for each amp and should be backwards
+	 * compatible to the existing acpi match tables to not break existing UCMs.
+	 * For the "AMP" name_prefix, we append the amp index to it. However, for the
+	 * "Left" name_prefix, we convert the second amp name_prefix to "Right" and
+	 * for the third and further amps, we set the name_prefix to "AMP<amp_index>".
+	 */
+	if (!strcmp(adr_dev[index].name_prefix, "AMP")) {
+		adr_dev[index].name_prefix = devm_kasprintf(dev, GFP_KERNEL, "%s%d",
+							    adr_dev[index].name_prefix,
+							    *amp_index);
+		if (!adr_dev[index].name_prefix)
+			return NULL;
+		(*amp_index)++;
+	}
+
+	if (!strcmp(adr_dev[index].name_prefix, "Left")) {
+		/* Convert the second amp name_prefix to Right */
+		if ((*amp_index) == 2) {
+			adr_dev[index].name_prefix = devm_kasprintf(dev, GFP_KERNEL,
+								    "%s", "Right");
+			if (!adr_dev[index].name_prefix)
+				return NULL;
+		}
+		/* Set the name_fix to AMP<amp_index> if there are more than 2 amps */
+		if (*amp_index > 2) {
+			adr_dev[index].name_prefix = devm_kasprintf(dev, GFP_KERNEL, "%s%d",
+								    "AMP", *amp_index);
+			if (!adr_dev[index].name_prefix)
+				return NULL;
+		}
+		(*amp_index)++;
+	}
+
+	dev_dbg(dev, "adr[%d] 0x%llx link id %d name_prefix \"%s\" is found\n",
+		index, adr_dev[index].adr, sdw_device->bus->link_id, adr_dev[index].name_prefix);
+
+	link->num_adr++;
+
+	return adr_dev;
+}
+
 static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pdata *pdata = sdev->pdata;
 	const struct snd_soc_acpi_link_adr *link;
+	struct snd_soc_acpi_link_adr *links;
 	struct sdw_peripherals *peripherals;
 	struct snd_soc_acpi_mach *mach;
 	struct sof_intel_hda_dev *hdev;
-	u32 link_mask;
+	int link_index, link_num;
+	int amp_index = 1;
+	u32 link_mask = 0;
 	int i;
 
 	hdev = pdata->hw_pdata;
@@ -1201,7 +1334,54 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 			 peripherals->array[i]->id.part_id,
 			 peripherals->array[i]->id.sdw_version);
 
-	return NULL;
+	if (!peripherals->num_peripherals)
+		return NULL;
+
+	/* Create default SDW mach */
+	mach = devm_kzalloc(sdev->dev, sizeof(*mach), GFP_KERNEL);
+	if (!mach)
+		return NULL;
+
+	/* Get link mask and link number */
+	for (i = 0; i < peripherals->num_peripherals; i++)
+		link_mask |= BIT(peripherals->array[i]->bus->link_id);
+
+	link_num = hweight32(link_mask);
+	links = devm_kcalloc(sdev->dev, link_num, sizeof(*links), GFP_KERNEL);
+	if (!links)
+		return NULL;
+
+	link_index = 0;
+	/* Generate snd_soc_acpi_link_adr struct for each peripheral reported by the ACPI table */
+	for (i = 0; i < peripherals->num_peripherals; i++) {
+		links[link_index].adr_d = find_acpi_adr_device(sdev->dev, peripherals->array[i],
+							       &links[link_index], &amp_index);
+
+		/*
+		 * Only increase the link_index when the next periperal is on a different link.
+		 * Assume that peripherals are grouped by link_id in the ACPI table.
+		 */
+		if (i < peripherals->num_peripherals - 1 &&
+		    peripherals->array[i + 1]->bus->link_id != peripherals->array[i]->bus->link_id)
+			link_index++;
+
+		if (link_index > link_num) {
+			dev_err(sdev->dev,
+				"link_index %d exceeds the link number %d link_mask #%x\n",
+				link_index, link_num, link_mask);
+			return NULL;
+		}
+	}
+
+	mach->drv_name = "sof_sdw";
+	mach->sof_tplg_filename = "sof-sdw-generic.tplg";
+	mach->mach_params.links = links;
+	mach->mach_params.link_mask = link_mask;
+	mach->mach_params.platform = dev_name(sdev->dev);
+	mach->get_function_tplg_files = sof_sdw_get_tplg_files;
+	dev_info(sdev->dev, "Use default SDW machine driver %s topology: %s\n",
+		 mach->drv_name, mach->sof_tplg_filename);
+	return mach;
 }
 #else
 static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev)
@@ -1529,6 +1709,7 @@ MODULE_IMPORT_NS("SND_SOC_SOF_XTENSA");
 MODULE_IMPORT_NS("SND_INTEL_SOUNDWIRE_ACPI");
 MODULE_IMPORT_NS("SOUNDWIRE_INTEL_INIT");
 MODULE_IMPORT_NS("SOUNDWIRE_INTEL");
+MODULE_IMPORT_NS("SND_SOC_SDW_UTILS");
 MODULE_IMPORT_NS("SND_SOC_SOF_HDA_MLINK");
 MODULE_IMPORT_NS("SND_SOC_SOF_INTEL_HDA_COMMON");
 MODULE_IMPORT_NS("SND_SOC_ACPI_INTEL_MATCH");