[PATCH 3/5] ASoC: SOF: Intel: hda: simplify and reduce indentation for hda_sdw_machine_select()

[Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>]

Simplify code to return when no links are enabled. No functional
change, just code cleanup before updates.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/intel/hda.c | 139 +++++++++++++++++++-------------------
 1 file changed, 71 insertions(+), 68 deletions(-)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 4d0fe706ebc1..8ddc1b0ca3c9 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -1653,92 +1653,95 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 	hdev = pdata->hw_pdata;
 	link_mask = hdev->info.link_mask;
 
+	if (!link_mask) {
+		dev_info(sdev->dev, "SoundWire links not enabled\n");
+		return NULL;
+	}
+
 	/*
 	 * Select SoundWire machine driver if needed using the
 	 * alternate tables. This case deals with SoundWire-only
 	 * machines, for mixed cases with I2C/I2S the detection relies
 	 * on the HID list.
 	 */
-	if (link_mask) {
-		for (mach = pdata->desc->alt_machines;
-		     mach && mach->link_mask; mach++) {
-			/*
-			 * On some platforms such as Up Extreme all links
-			 * are enabled but only one link can be used by
-			 * external codec. Instead of exact match of two masks,
-			 * first check whether link_mask of mach is subset of
-			 * link_mask supported by hw and then go on searching
-			 * link_adr
-			 */
-			if (~link_mask & mach->link_mask)
-				continue;
+	for (mach = pdata->desc->alt_machines;
+	     mach && mach->link_mask; mach++) {
+		/*
+		 * On some platforms such as Up Extreme all links
+		 * are enabled but only one link can be used by
+		 * external codec. Instead of exact match of two masks,
+		 * first check whether link_mask of mach is subset of
+		 * link_mask supported by hw and then go on searching
+		 * link_adr
+		 */
+		if (~link_mask & mach->link_mask)
+			continue;
 
-			/* No need to match adr if there is no links defined */
-			if (!mach->links)
-				break;
+		/* No need to match adr if there is no links defined */
+		if (!mach->links)
+			break;
 
-			link = mach->links;
-			for (i = 0; i < hdev->info.count && link->num_adr;
-			     i++, link++) {
-				/*
-				 * Try next machine if any expected Slaves
-				 * are not found on this link.
-				 */
-				if (!snd_soc_acpi_sdw_link_slaves_found(sdev->dev, link,
-									hdev->sdw->ids,
-									hdev->sdw->num_slaves))
-					break;
-			}
-			/* Found if all Slaves are checked */
-			if (i == hdev->info.count || !link->num_adr)
+		link = mach->links;
+		for (i = 0; i < hdev->info.count && link->num_adr;
+		     i++, link++) {
+			/*
+			 * Try next machine if any expected Slaves
+			 * are not found on this link.
+			 */
+			if (!snd_soc_acpi_sdw_link_slaves_found(sdev->dev, link,
+								hdev->sdw->ids,
+								hdev->sdw->num_slaves))
 				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;
-			}
+		/* Found if all Slaves are checked */
+		if (i == hdev->info.count || !link->num_adr)
+			break;
+	}
+	if (mach && mach->link_mask) {
+		int dmic_num = 0;
+		bool tplg_fixup;
+		const char *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;
+		mach->mach_params.links = mach->links;
+		mach->mach_params.link_mask = mach->link_mask;
+		mach->mach_params.platform = dev_name(sdev->dev);
 
-				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;
+		if (pdata->tplg_filename) {
+			tplg_fixup = false;
+		} else {
+			tplg_fixup = true;
+			tplg_filename = mach->sof_tplg_filename;
+		}
 
-			dev_dbg(sdev->dev,
-				"SoundWire machine driver %s topology %s\n",
-				mach->drv_name,
-				pdata->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;
 
-			return mach;
+			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);
 
-		dev_info(sdev->dev, "No SoundWire machine driver found\n");
+		return mach;
 	}
 
+	dev_info(sdev->dev, "No SoundWire machine driver found\n");
+
 	return NULL;
 }
 #else
-- 
2.40.1