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ALSA: hda - Support rereading widgets under the function group

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A codec may allow software to hide some unused pin/cvt widgets.

Sometimes BIOS does not enable the hidden widgets properly although they are
needed for the board. Thus the driver need to enable them as a board-specific
fixup and the whole tree will change.

This patch implements a common code for rereading codec widgets. So the fixup
code can call it after enabling the hidden widgets.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mengdong Lin 2013-02-08 17:09:31 -05:00 committed by Takashi Iwai
parent 4eea30914f
commit a15d05db41
2 changed files with 25 additions and 0 deletions
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24
sound/pci/hda/hda_codec.c
View file

@ -1441,6 +1441,30 @@ int snd_hda_codec_new(struct hda_bus *bus,
}
EXPORT_SYMBOL_HDA(snd_hda_codec_new);
int snd_hda_codec_update_widgets(struct hda_codec *codec)
{
hda_nid_t fg;
int err;
/* Assume the function group node does not change,
* only the widget nodes may change.
*/
kfree(codec->wcaps);
fg = codec->afg ? codec->afg : codec->mfg;
err = read_widget_caps(codec, fg);
if (err < 0) {
snd_printk(KERN_ERR "hda_codec: cannot malloc\n");
return err;
}
snd_array_free(&codec->init_pins);
err = read_pin_defaults(codec);
return err;
}
EXPORT_SYMBOL_HDA(snd_hda_codec_update_widgets);
/**
* snd_hda_codec_configure - (Re-)configure the HD-audio codec
* @codec: the HDA codec

1
sound/pci/hda/hda_codec.h
View file

@ -935,6 +935,7 @@ int snd_hda_bus_new(struct snd_card *card, const struct hda_bus_template *temp,
int snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
struct hda_codec **codecp);
int snd_hda_codec_configure(struct hda_codec *codec);
int snd_hda_codec_update_widgets(struct hda_codec *codec);
/*
* low level functions