ALSA: hda - Add an example about pin reconfiguration

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt
index a4e5ef8..99958be 100644 (file)
--- a/Documentation/sound/alsa/HD-Audio.txt
+++ b/Documentation/sound/alsa/HD-Audio.txt
@@ -391,6 +391,14 @@ clear::
   Resets the codec, removes the mixer elements and PCM stuff of the
   specified codec, and clear all init verbs and hints.
 
   Resets the codec, removes the mixer elements and PCM stuff of the
   specified codec, and clear all init verbs and hints.
 

+For example, when you want to change the pin default configuration
+value of the pin widget 0x14 to 0x9993013f, and let the driver
+re-configure based on that state, run like below:
+------------------------------------------------------------------------
+  # echo 0x14 0x9993013f > /sys/class/sound/hwC0D0/user_pin_configs
+  # echo 1 > /sys/class/sound/hwC0D0/reconfig  
+------------------------------------------------------------------------
+

 
 Power-Saving
 ~~~~~~~~~~~~
 
 Power-Saving
 ~~~~~~~~~~~~