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Commit a15d05db authored by Mengdong Lin's avatar Mengdong Lin Committed by Takashi Iwai
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ALSA: hda - Support rereading widgets under the function group 



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: default avatarMengdong Lin <mengdong.lin@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 4eea3091

sound/pci/hda/hda_codec.c

+24 −0
Original line number Diff line number Diff line
@@ -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

sound/pci/hda/hda_codec.h

+1 −0
Original line number Diff line number Diff line
@@ -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