From d7fdc00ae50b3dc02364301b334a6352c58e9e85 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 10 Jan 2013 08:38:04 +0100 Subject: ALSA: hda - Add helper functions to cache the current pinctl target We already have the list of whole pin widgets and there is an unused space in the list; let's use it for caching the current pinctl value. Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'sound/pci/hda/hda_codec.c') diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 733bce6..505cb72 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1100,6 +1100,32 @@ unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid) } EXPORT_SYMBOL_HDA(snd_hda_codec_get_pincfg); +/* remember the current pinctl target value */ +int snd_hda_codec_set_pin_target(struct hda_codec *codec, hda_nid_t nid, + unsigned int val) +{ + struct hda_pincfg *pin; + + pin = look_up_pincfg(codec, &codec->init_pins, nid); + if (!pin) + return -EINVAL; + pin->target = val; + return 0; +} +EXPORT_SYMBOL_HDA(snd_hda_codec_set_pin_target); + +/* return the current pinctl target value */ +int snd_hda_codec_get_pin_target(struct hda_codec *codec, hda_nid_t nid) +{ + struct hda_pincfg *pin; + + pin = look_up_pincfg(codec, &codec->init_pins, nid); + if (!pin) + return 0; + return pin->target; +} +EXPORT_SYMBOL_HDA(snd_hda_codec_get_pin_target); + /** * snd_hda_shutup_pins - Shut up all pins * @codec: the HDA codec @@ -5266,6 +5292,7 @@ int _snd_hda_set_pin_ctl(struct hda_codec *codec, hda_nid_t pin, val &= ~(AC_PINCTL_IN_EN | AC_PINCTL_VREFEN); } } + snd_hda_codec_set_pin_target(codec, pin, val); if (cached) return snd_hda_codec_update_cache(codec, pin, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, val); -- cgit v1.1