ASoC: SOF: Intel: hda: refactoring topology fixup for SDW mach

Modify machine driver enumeration flow for SDW mach to leverage the
code of SND_SOC_ACPI_TPLG_INTEL_DMIC_NUMBER quirk which is designed
for I2S mach originally.

SDW mach does not use the DMIC quirk flag and pass full topology name
with file extension to SOF driver. Therefore, we add extra code to
hda_generic_machine_select() function to cope with the difference.

Signed-off-by: Brent Lu <brent.lu@intel.com>

Author: brentlu

sound/soc/sof/intel/hda.c

@@ -511,6 +511,8 @@ static int check_dmic_num(struct snd_sof_dev *sdev)
 	if (nhlt)
 		dmic_num = intel_nhlt_get_dmic_geo(sdev->dev, nhlt);
 
+	dev_info(sdev->dev, "DMICs detected in NHLT tables: %d\n", dmic_num);
+
 	/* allow for module parameter override */
 	if (dmic_num_override != -1) {
 		dev_dbg(sdev->dev,
@@ -558,82 +560,6 @@ static int check_nhlt_ssp_mclk_mask(struct snd_sof_dev *sdev, int ssp_num)
 	return intel_nhlt_ssp_mclk_mask(nhlt, ssp_num);
 }
 
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
-
-static const char *fixup_tplg_name(struct snd_sof_dev *sdev,
-				   const char *sof_tplg_filename,
-				   const char *idisp_str,
-				   const char *dmic_str)
-{
-	const char *tplg_filename = NULL;
-	char *filename, *tmp;
-	const char *split_ext;
-
-	filename = kstrdup(sof_tplg_filename, GFP_KERNEL);
-	if (!filename)
-		return NULL;
-
-	/* this assumes a .tplg extension */
-	tmp = filename;
-	split_ext = strsep(&tmp, ".");
-	if (split_ext)
-		tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
-					       "%s%s%s.tplg",
-					       split_ext, idisp_str, dmic_str);
-	kfree(filename);
-
-	return tplg_filename;
-}
-
-static int dmic_detect_topology_fixup(struct snd_sof_dev *sdev,
-				      const char **tplg_filename,
-				      const char *idisp_str,
-				      int *dmic_found,
-				      bool tplg_fixup)
-{
-	const char *dmic_str;
-	int dmic_num;
-
-	/* first check for DMICs (using NHLT or module parameter) */
-	dmic_num = check_dmic_num(sdev);
-
-	switch (dmic_num) {
-	case 1:
-		dmic_str = "-1ch";
-		break;
-	case 2:
-		dmic_str = "-2ch";
-		break;
-	case 3:
-		dmic_str = "-3ch";
-		break;
-	case 4:
-		dmic_str = "-4ch";
-		break;
-	default:
-		dmic_num = 0;
-		dmic_str = "";
-		break;
-	}
-
-	if (tplg_fixup) {
-		const char *default_tplg_filename = *tplg_filename;
-		const char *fixed_tplg_filename;
-
-		fixed_tplg_filename = fixup_tplg_name(sdev, default_tplg_filename,
-						      idisp_str, dmic_str);
-		if (!fixed_tplg_filename)
-			return -ENOMEM;
-		*tplg_filename = fixed_tplg_filename;
-	}
-
-	dev_info(sdev->dev, "DMICs detected in NHLT tables: %d\n", dmic_num);
-	*dmic_found = dmic_num;
-
-	return 0;
-}
-#endif
-
 static int hda_init_caps(struct snd_sof_dev *sdev)
 {
 	u32 interface_mask = hda_get_interface_mask(sdev);
@@ -1199,45 +1125,10 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 			break;
 	}
 	if (mach && mach->link_mask) {
-		int dmic_num = 0;
-		bool tplg_fixup;
-		const char *tplg_filename;
-
 		mach->mach_params.links = mach->links;
 		mach->mach_params.link_mask = mach->link_mask;
 		mach->mach_params.platform = dev_name(sdev->dev);
 
-		if (pdata->tplg_filename) {
-			tplg_fixup = false;
-		} else {
-			tplg_fixup = true;
-			tplg_filename = mach->sof_tplg_filename;
-		}
-
-		/*
-		 * DMICs use up to 4 pins and are typically pin-muxed with SoundWire
-		 * link 2 and 3, or link 1 and 2, thus we only try to enable dmics
-		 * if all conditions are true:
-		 * a) 2 or fewer links are used by SoundWire
-		 * b) the NHLT table reports the presence of microphones
-		 */
-		if (hweight_long(mach->link_mask) <= 2) {
-			int ret;
-
-			ret = dmic_detect_topology_fixup(sdev, &tplg_filename, "",
-							 &dmic_num, tplg_fixup);
-			if (ret < 0)
-				return NULL;
-		}
-		if (tplg_fixup)
-			pdata->tplg_filename = tplg_filename;
-		mach->mach_params.dmic_num = dmic_num;
-
-		dev_dbg(sdev->dev,
-			"SoundWire machine driver %s topology %s\n",
-			mach->drv_name,
-			pdata->tplg_filename);
-
 		return mach;
 	}
 
@@ -1294,6 +1185,19 @@ static int check_tplg_quirk_mask(struct snd_soc_acpi_mach *mach)
 	return 0;
 }
 
+static char *remove_file_ext(const char *tplg_filename)
+{
+	char *filename, *tmp;
+
+	filename = kstrdup(tplg_filename, GFP_KERNEL);
+	if (!filename)
+		return NULL;
+
+	/* remove file extension if exist */
+	tmp = filename;
+	return strsep(&tmp, ".");
+}
+
 struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 {
 	u32 interface_mask = hda_get_interface_mask(sdev);
@@ -1305,6 +1209,7 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 	const char *tplg_filename;
 	const char *tplg_suffix;
 	bool i2s_mach_found = false;
+	bool sdw_mach_found = false;
 
 	/* Try I2S or DMIC if it is supported */
 	if (interface_mask & (BIT(SOF_DAI_INTEL_SSP) | BIT(SOF_DAI_INTEL_DMIC))) {
@@ -1318,8 +1223,11 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 	 * try SoundWire if it is supported
 	 */
 	if (!mach && !HDA_EXT_CODEC(bus->codec_mask) &&
-	    (interface_mask & BIT(SOF_DAI_INTEL_ALH)))
+	    (interface_mask & BIT(SOF_DAI_INTEL_ALH))) {
 		mach = hda_sdw_machine_select(sdev);
+		if (mach)
+			sdw_mach_found = true;
+	}
 
 	/*
 	 * Choose HDA generic machine driver if mach is NULL.
@@ -1334,15 +1242,20 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 	 * name string if quirk flag is set.
 	 */
 	if (mach) {
-		bool add_extension = false;
 		bool tplg_fixup = false;
+		bool dmic_fixup = false;
 
 		/*
 		 * If tplg file name is overridden, use it instead of
 		 * the one set in mach table
 		 */
 		if (!sof_pdata->tplg_filename) {
-			sof_pdata->tplg_filename = mach->sof_tplg_filename;
+			/* remove file extension if exist */
+			tplg_filename = remove_file_ext(mach->sof_tplg_filename);
+			if (!tplg_filename)
+				return NULL;
+
+			sof_pdata->tplg_filename = tplg_filename;
 			tplg_fixup = true;
 		}
 
@@ -1360,8 +1273,24 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 		/* report to machine driver if any DMICs are found */
 		mach->mach_params.dmic_num = check_dmic_num(sdev);
 
+		/* SDW mach does not use DMIC quirk flag. */
+		if (sdw_mach_found) {
+			/*
+			 * DMICs use up to 4 pins and are typically pin-muxed with SoundWire
+			 * link 2 and 3, or link 1 and 2, thus we only try to enable dmics
+			 * if all conditions are true:
+			 * a) 2 or fewer links are used by SoundWire
+			 * b) the NHLT table reports the presence of microphones
+			 */
+			if (hweight_long(mach->link_mask) <= 2)
+				dmic_fixup = true;
+		} else {
+			if (mach->tplg_quirk_mask & SND_SOC_ACPI_TPLG_INTEL_DMIC_NUMBER)
+				dmic_fixup = true;
+		}
+
 		if (tplg_fixup &&
-		    mach->tplg_quirk_mask & SND_SOC_ACPI_TPLG_INTEL_DMIC_NUMBER &&
+		    dmic_fixup &&
 		    mach->mach_params.dmic_num) {
 			tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 						       "%s%s%d%s",
@@ -1373,7 +1302,6 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 				return NULL;
 
 			sof_pdata->tplg_filename = tplg_filename;
-			add_extension = true;
 		}
 
 		if (mach->link_mask) {
@@ -1413,7 +1341,6 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 				return NULL;
 
 			sof_pdata->tplg_filename = tplg_filename;
-			add_extension = true;
 
 			mclk_mask = check_nhlt_ssp_mclk_mask(sdev, ssp_num);
 
@@ -1451,7 +1378,6 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 				return NULL;
 
 			sof_pdata->tplg_filename = tplg_filename;
-			add_extension = true;
 		}
 
 		codec_type = snd_soc_acpi_intel_detect_codec_type(sdev->dev);
@@ -1474,10 +1400,9 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 				return NULL;
 
 			sof_pdata->tplg_filename = tplg_filename;
-			add_extension = true;
 		}
 
-		if (tplg_fixup && add_extension) {
+		if (tplg_fixup) {
 			tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 						       "%s%s",
 						       sof_pdata->tplg_filename,