From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 20 Apr 2012 10:34:50 +0000 (+0200)
Subject: ALSA: hda - Introduce snd_hda_set_pin_ctl*() helper functions
X-Git-Tag: v3.5-rc1~83^2~4^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cdd03cedc5b55da017fcdeff7d47cac2639cded8;p=pandora-kernel.git

ALSA: hda - Introduce snd_hda_set_pin_ctl*() helper functions

For setting the pin-control values more safely to match with the
actual pin capability bits, a copule of new helper functions,
snd_hda_set_pin_ctl() and snd_hda_set_pin_ctl_cache(), are
introduced.  These are simple replacement of the codec verb write with
AC_VERB_SET_PIN_WIDGET but do more sanity checks and filter out
superfluous pin-control bits if they don't fit with the corresponding
pin capabilities.

Some codecs are screwed up or ignore the command when such a wrong bit
is set.  These helpers will avoid such secret errors.

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