test-case/check-alsabat.sh: Select the first card for amixer contents

Amixer, by default, looks for the first card, and in Amixer's view,
the first card is always numbered 0.

In the SoundWire configuration, card 0 is set to sof-probe, while
card 1 is assigned to the actual sound card. Therefore, we are
configuring it accordingly.

Fixes: #1265

Signed-off-by: Hariprasad, Rajendra <hariprasad.rajendra@intel.com>

Author: harajend

test-case/check-alsabat.sh

@@ -123,9 +123,11 @@ alsabat -P$pcm_p --standalone -n $frames -c $channel_p -r $rate -f $format -F $f
 # playback may have low latency, add one second delay to aviod recording zero at beginning.
 sleep 1
 
+# Select the first card
+first_card_name=$(aplay -l | awk '/^card ([0-9]+)/ {print $3; exit}')
 # dump amixer contents always.
 # Good case amixer settings is for reference, bad case for debugging.
-amixer contents > "$LOG_ROOT"/amixer_settings.txt
+amixer -c "${first_card_name}" contents > "$LOG_ROOT"/amixer_settings.txt
 
 # We use different USB sound cards in CI, part of them only support 1 channel for capture,
 # so make the channel as an option and config it in alsabat-playback.csv