C++ (Cpp) snd_hda_gen_add_kctl示例

示例#1

文件： patch_cirrus.c 项目： AlexShiLucky/linux

static int cs421x_parse_auto_config(struct hda_codec *codec)
{
	struct cs_spec *spec = codec->spec;
	hda_nid_t dac = CS4210_DAC_NID;
	int err;

	fix_volume_caps(codec, dac);

	err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL, 0);
	if (err < 0)
		return err;

	err = snd_hda_gen_parse_auto_config(codec, &spec->gen.autocfg);
	if (err < 0)
		return err;

	parse_cs421x_digital(codec);

	if (spec->gen.autocfg.speaker_outs &&
	    spec->vendor_nid == CS4210_VENDOR_NID) {
		if (!snd_hda_gen_add_kctl(&spec->gen, NULL,
					  &cs421x_speaker_boost_ctl))
			return -ENOMEM;
	}

	return 0;
}

示例#2

文件： patch_analog.c 项目： ReneNyffenegger/linux

static int ad1983_add_spdif_mux_ctl(struct hda_codec *codec)
{
	struct ad198x_spec *spec = codec->spec;
	hda_nid_t dig_out = spec->gen.multiout.dig_out_nid;
	int num_conns;

	if (!dig_out)
		return 0;
	num_conns = snd_hda_get_num_conns(codec, dig_out);
	if (num_conns != 2 && num_conns != 3)
		return 0;
	if (!snd_hda_gen_add_kctl(&spec->gen, NULL, &ad1983_auto_smux_mixer))
		return -ENOMEM;
	return 0;
}