From cc0bcef81389dab05ca9f150694a2969fae93656 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Mon, 15 Apr 2024 10:17:39 -0500
Subject: [PATCH] alsa-info.sh: log SoundWire devices reported in ACPI

Track SoundWire devices reported in ACPI, this will help detect
missing or invalid configurations.

For now we only filter information from Realtek, Cirrus Logic and TI,
based on the manufacturer ID of their devices.

Example log for the classic RT711/RT1316x2/RT714 configuration.

!!ACPI SoundWire Device Status Information
!!---------------

Realtek 0x000030025d071101
Realtek 0x000331025d131601
Realtek 0x000230025d131601
Realtek 0x000130025d071401

As noted by reviewers, the script reports everything exposed in
ACPI. In practice some of the devices listed may not be physically
populated in hardware, or be listed as attached on a link that's
disabled by the manager. The drivers can cope with this case, it's not
technically an error.

Closes: https://github.com/alsa-project/alsa-utils/pull/264
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 alsa-info/alsa-info.sh | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/alsa-info/alsa-info.sh b/alsa-info/alsa-info.sh
index 8f05934..fda784d 100755
--- a/alsa-info/alsa-info.sh
+++ b/alsa-info/alsa-info.sh
@@ -461,6 +461,20 @@ if [ -d /sys/bus/acpi/devices ]; then
     done
 fi
 
+# Check for SoundWire ACPI _adr device status
+if [ -d /sys/bus/acpi/devices ]; then
+	for f in /sys/bus/acpi/devices/*/adr; do
+		ACPI_ADR=$(cat $f 2>/dev/null);
+		if [[ "$ACPI_ADR" -ne 0 ]]; then
+			case $ACPI_ADR in
+				0x??????025d*) echo "Realtek $ACPI_ADR" >>$TEMPDIR/sdwstatus.tmp;;
+				0x??????01fa*) echo "Cirrus Logic $ACPI_ADR" >>$TEMPDIR/sdwstatus.tmp;;
+				0x??????0102*) echo "TI $ACPI_ADR" >>$TEMPDIR/sdwstatus.tmp;;
+			esac
+		fi
+	done
+fi
+
 awk '{ print $2 " (card " $1 ")" }' < /proc/asound/modules > $TEMPDIR/alsamodules.tmp 2> /dev/null
 cat /proc/asound/cards > $TEMPDIR/alsacards.tmp
 if [[ ! -z "$LSPCI" ]]; then
@@ -528,6 +542,12 @@ echo "" >> $FILE
 cat $TEMPDIR/acpidevicestatus.tmp >> $FILE
 echo "" >> $FILE
 echo "" >> $FILE
+echo "!!ACPI SoundWire Device Status Information" >> $FILE
+echo "!!---------------" >> $FILE
+echo "" >> $FILE
+cat $TEMPDIR/sdwstatus.tmp >> $FILE
+echo "" >> $FILE
+echo "" >> $FILE
 echo "!!Kernel Information" >> $FILE
 echo "!!------------------" >> $FILE
 echo "" >> $FILE