BIOS vendors typically reuse the same definitions between different platforms and expose the relevant hardware by changing the value of the _STA method.
For example on the Asus T100HA, there are 3 HID values for audio codecs in the DSDT table but two have a zero status and will be ignored by the ACPI subsystem.
$ more /sys/bus/acpi/devices/10EC*/status :::::::::::::: /sys/bus/acpi/devices/10EC3270:00/status :::::::::::::: 15 :::::::::::::: /sys/bus/acpi/devices/10EC5640:00/status :::::::::::::: 0 :::::::::::::: /sys/bus/acpi/devices/10EC5648:00/status :::::::::::::: 0
This information is very useful to figure out which HIDs/quirks need to be supported. Add log to alsa-info.sh to only expose non-zero results of the ACPI _STA method, e.g.
!!ACPI Device Status Information !!---------------
/sys/bus/acpi/devices/10EC3270:00/status 15
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- alsa-info/alsa-info.sh | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/alsa-info/alsa-info.sh b/alsa-info/alsa-info.sh index 9684c6f..cda4125 100755 --- a/alsa-info/alsa-info.sh +++ b/alsa-info/alsa-info.sh @@ -441,6 +441,16 @@ elif [ -x $DMIDECODE ]; then DMI_BOARD_NAME=$($DMIDECODE -s baseboard-product-name 2>/dev/null) fi
+# Check for ACPI device status +if [ -d /sys/bus/acpi/devices ]; then + for f in /sys/bus/acpi/devices/*/status; do + ACPI_STATUS=$(cat $f 2>/dev/null); + if [[ "$ACPI_STATUS" -ne 0 ]]; then + echo $f $'\t' $ACPI_STATUS >>$TEMPDIR/acpidevicestatus.tmp; + fi + done +fi + cat /proc/asound/modules 2>/dev/null|awk {'print $2'}>$TEMPDIR/alsamodules.tmp cat /proc/asound/cards >$TEMPDIR/alsacards.tmp if [[ ! -z "$LSPCI" ]]; then @@ -487,6 +497,12 @@ echo "Board Vendor: $DMI_BOARD_VENDOR" >> $FILE echo "Board Name: $DMI_BOARD_NAME" >> $FILE echo "" >> $FILE echo "" >> $FILE +echo "!!ACPI Device Status Information" >> $FILE +echo "!!---------------" >> $FILE +echo "" >> $FILE +cat $TEMPDIR/acpidevicestatus.tmp >> $FILE +echo "" >> $FILE +echo "" >> $FILE echo "!!Kernel Information" >> $FILE echo "!!------------------" >> $FILE echo "" >> $FILE