/**

 * snd_hda_gen_shutup_speakers - Forcibly mute the speaker outputs

 * @codec: the HDA codec

 *

 * Forcibly mute the speaker outputs, to be called at suspend or shutdown.

 *

 * The mute state done by this function isn't cached, hence the original state

 * will be restored at resume.

 */

void snd_hda_gen_shutup_speakers(struct hda_codec *codec)

{

	struct hda_gen_spec *spec = codec->spec;

	const int *paths;

	const struct nid_path *path;

	int i, p, num_paths;

	hda_nid_t nid;

	/* if already powered off, do nothing */

	if (!snd_hdac_is_power_on(&codec->core))

		return;

	if (spec->autocfg.line_out_type == AUTO_PIN_SPEAKER_OUT) {

		paths = spec->out_paths;

		num_paths = spec->autocfg.line_outs;

	} else {

		paths = spec->speaker_paths;

		num_paths = spec->autocfg.speaker_outs;

	}

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

		path = snd_hda_get_path_from_idx(codec, paths[i]);

		if (!path)

			continue;

		for (p = 0; p < path->depth; p++) {

			nid = path->path[p];

			if (!nid)

				break;

			if (!nid_has_mute(codec, nid, HDA_OUTPUT))

				continue; /* no mute, skip */

			if (snd_hda_codec_amp_read(codec, nid, 0, HDA_OUTPUT, 0) &

			    snd_hda_codec_amp_read(codec, nid, 1, HDA_OUTPUT, 0) &

			    HDA_AMP_MUTE)

				continue; /* both channels already muted, skip */

			/* direct amp update without caching */

			snd_hda_codec_write(codec, nid, 0,

					    AC_VERB_SET_AMP_GAIN_MUTE,

					    AC_AMP_SET_OUTPUT |

					    AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT |

					    HDA_AMP_MUTE);

		}

	}

}

EXPORT_SYMBOL_GPL(snd_hda_gen_shutup_speakers);

void snd_hda_gen_shutup_speakers(struct hda_codec *codec);