Commit ebb93c05 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Mute all aamix inputs as default 



Not all channels have been initialized, so far, especially when aamix
NID itself doesn't have amps but its leaves have.  This patch fixes
these holes.  Otherwise you might get unexpected loopback inputs,
e.g. from surround channels.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6733cf57

sound/pci/hda/hda_generic.c

+24 −0
Original line number Diff line number Diff line
@@ -4297,6 +4297,26 @@ static unsigned int snd_hda_gen_path_power_filter(struct hda_codec *codec, 
	return AC_PWRST_D3;

}



/* mute all aamix inputs initially; parse up to the first leaves */

static void mute_all_mixer_nid(struct hda_codec *codec, hda_nid_t mix)

{

	int i, nums;

	const hda_nid_t *conn;

	bool has_amp;



	nums = snd_hda_get_conn_list(codec, mix, &conn);

	has_amp = nid_has_mute(codec, mix, HDA_INPUT);

	for (i = 0; i < nums; i++) {

		if (has_amp)

			snd_hda_codec_amp_stereo(codec, mix,

						 HDA_INPUT, i,

						 0xff, HDA_AMP_MUTE);

		else if (nid_has_volume(codec, conn[i], HDA_OUTPUT))

			snd_hda_codec_amp_stereo(codec, conn[i],

						 HDA_OUTPUT, 0,

						 0xff, HDA_AMP_MUTE);

	}

}



/*

 * Parse the given BIOS configuration and set up the hda_gen_spec
@@ -4435,6 +4455,10 @@ int snd_hda_gen_parse_auto_config(struct hda_codec *codec, 
		}

	}



	/* mute all aamix input initially */

	if (spec->mixer_nid)

		mute_all_mixer_nid(codec, spec->mixer_nid);



 dig_only:

	parse_digital(codec);

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