ASoC: SOF: topology: add get_sof_sdw_tplg_files ops

Add get_sof_sdw_tplg_files ops to generate the topology file names for
the "sof-soundwire" card.

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

Author: bardliao

sound/soc/sof/Makefile

@@ -2,7 +2,7 @@
 
 snd-sof-y := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\
 		control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o\
-		fw-file-profile.o debug-dsp-ops.o
+		fw-file-profile.o debug-dsp-ops.o card-tplg-ops.o
 
 # IPC implementations
 ifneq ($(CONFIG_SND_SOC_SOF_IPC3),)

sound/soc/sof/card-tplg-ops.c

@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2025 Intel Corporation.
+//
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include "sof-priv.h"
+#include "topology.h"
+
+enum tplg_device_id {
+	TPLG_DEVICE_SDCA_JACK,
+	TPLG_DEVICE_SDCA_AMP,
+	TPLG_DEVICE_SDCA_MIC,
+	TPLG_DEVICE_PCH_DMIC,
+	TPLG_DEVICE_HDMI,
+	TPLG_DEVICE_MAX
+};
+
+#define SDCA_DEVICE_MASK (BIT(TPLG_DEVICE_SDCA_JACK) | BIT(TPLG_DEVICE_SDCA_AMP) | \
+			  BIT(TPLG_DEVICE_SDCA_MIC))
+
+#define SOF_INTEL_PLATFORM_NAME_MAX 4
+
+int get_sof_sdw_tplg_files(struct snd_soc_component *scomp, const char *file, char ***tplg_files)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
+	struct snd_sof_pdata *sof_pdata = sdev->pdata;
+	struct snd_soc_dai_link *dai_link;
+	char platform[SOF_INTEL_PLATFORM_NAME_MAX];
+	unsigned long tplg_mask = 0;
+	int tplg_num = 0;
+	int tplg_dev;
+	int ret;
+	int i;
+
+	if (sdev->pdata->ipc_type == SOF_IPC_TYPE_3)
+		return 0;
+
+	ret = sscanf(sof_pdata->tplg_filename, "sof-%3s-*.tplg", platform);
+	if (ret != 1)
+		return 0;
+
+	/* tplg_num is always less or equal to dai_link numbers */
+	*tplg_files = kcalloc(scomp->card->num_links, sizeof(char *), GFP_KERNEL);
+	if (!(*tplg_files))
+		return -ENOMEM;
+
+	for_each_card_prelinks(scomp->card, i, dai_link) {
+		char *tplg_device;
+
+		dev_dbg(scomp->dev, "dai_link %s id %d\n", dai_link->name, dai_link->id);
+		if (strstr(dai_link->name, "SimpleJack")) {
+			tplg_dev = TPLG_DEVICE_SDCA_JACK;
+			tplg_device = "sdca-jack";
+		} else if (strstr(dai_link->name, "SmartAmp")) {
+			tplg_dev = TPLG_DEVICE_SDCA_AMP;
+			tplg_device = devm_kasprintf(sdev->dev, GFP_KERNEL,
+						     "sdca-%damp", dai_link->num_cpus);
+			if (!tplg_device)
+				return -ENOMEM;
+		} else if (strstr(dai_link->name, "SmartMic")) {
+			tplg_dev = TPLG_DEVICE_SDCA_MIC;
+			tplg_device = "sdca-mic";
+		} else if (strstr(dai_link->name, "dmic")) {
+			if (strstr(file, "-2ch")) {
+				tplg_device = "dmic-2ch";
+			} else if (strstr(file, "-4ch")) {
+				tplg_device = "dmic-4ch";
+			} else {
+				dev_warn(scomp->dev,
+					 "only -2ch and -4ch are supported for dmic\n");
+				continue;
+			}
+			tplg_dev = TPLG_DEVICE_PCH_DMIC;
+		} else if (strstr(dai_link->name, "iDisp")) {
+			tplg_dev = TPLG_DEVICE_HDMI;
+			tplg_device = "hdmi-pcm5";
+
+		} else {
+			/* The dai link is not supported by sperated tplg yet */
+			dev_dbg(scomp->dev,
+				"dai_link %s is not supported by sperated tplg yet, Fail back to %s\n",
+				dai_link->name, file);
+			return 0;
+		}
+		if (tplg_mask & BIT(tplg_dev))
+			continue;
+
+		tplg_mask |= BIT(tplg_dev);
+
+		/*
+		 * The tplg file naming rule is sof-<platform>-<function>-id<BE id number>.tplg
+		 * where <platform> is only required for the DMIC function as the nhlt blob
+		 * is platform depentent.
+		 */
+		switch (tplg_dev) {
+		case TPLG_DEVICE_PCH_DMIC:
+			(*tplg_files)[tplg_num] = kasprintf(GFP_KERNEL, "%s/sof-%s-%s-id%d.tplg",
+						  sof_pdata->tplg_filename_prefix,
+						  platform, tplg_device, dai_link->id);
+			break;
+		default:
+			(*tplg_files)[tplg_num] = kasprintf(GFP_KERNEL, "%s/sof-%s-id%d.tplg",
+						  sof_pdata->tplg_filename_prefix,
+						  tplg_device, dai_link->id);
+			break;
+		}
+		if (!(*tplg_files)[tplg_num])
+			return -ENOMEM;
+		tplg_num++;
+	}
+
+	dev_dbg(scomp->dev, "tplg_mask %#lx tplg_num %d\n", tplg_mask, tplg_num);
+	return tplg_num;
+}
+

sound/soc/sof/topology.c

@@ -2476,6 +2476,10 @@ static const struct snd_soc_tplg_ops sof_dspless_tplg_ops = {
 };
 
 static const struct card_tplg_ops card_ops[] = {
+	{
+		.card_name = "sof-soundwire",
+		.get_tplg_files = get_sof_sdw_tplg_files,
+	},
 };
 
 int snd_sof_load_topology(struct snd_soc_component *scomp, const char *file)

sound/soc/sof/topology.h

@@ -15,4 +15,6 @@ struct card_tplg_ops {
 			      char ***tplg_files);
 };
 
+int get_sof_sdw_tplg_files(struct snd_soc_component *scomp, const char *file, char ***tplg_files);
+
 #endif