ALSA: hda - Create Headhpone Mic Jack Mode when really needed (ced4cefc) · Commits · 戴 / test

When a headphone jack is configurable as input, the generic parser tries to make it retaskable as Headphone Mic. The switching can be done smoothly if Capture Source control exists (i.e. there is another input source). Or when user explicitly enables the creation of jack mode controls, "Headhpone Mic Jack Mode" will be created accordingly. However, if the headphone mic is the only input source, we have to create "Headphone Mic Jack Mode" control because there is no capture source selection. Otherwise, the generic parser assumes that the input is constantly enabled, thus the headphone is permanently set as input. This situation happens on the old MacBook Airs where no input is supported properly, for example. This patch fixes the problem: now "Headphone Mic Jack Mode" is created when such an input selection isn't possible. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65681 Cc: <stable@vger.kernel.org> Signed-off-by:

Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

+12 −8

Original line number	Diff line number	Diff line
		@@ -2506,12 +2506,8 @@ static int create_out_jack_modes(struct hda_codec *codec, int num_pins,

		for (i = 0; i < num_pins; i++) {
		hda_nid_t pin = pins[i];
		if (pin == spec->hp_mic_pin) {
		int ret = create_hp_mic_jack_mode(codec, pin);
		if (ret < 0)
		return ret;
		if (pin == spec->hp_mic_pin)
		continue;
		}
		if (get_out_jack_num_items(codec, pin) > 1) {
		struct snd_kcontrol_new *knew;
		char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
		@@ -2784,9 +2780,6 @@ static int create_hp_mic_jack_mode(struct hda_codec *codec, hda_nid_t pin)
		struct hda_gen_spec *spec = codec->spec;
		struct snd_kcontrol_new *knew;

		if (get_out_jack_num_items(codec, pin) <= 1 &&
		get_in_jack_num_items(codec, pin) <= 1)
		return 0; /* no need */
		knew = snd_hda_gen_add_kctl(spec, "Headphone Mic Jack Mode",
		&hp_mic_jack_mode_enum);
		if (!knew)
		@@ -4383,6 +4376,17 @@ int snd_hda_gen_parse_auto_config(struct hda_codec *codec,
		if (err < 0)
		return err;

		/* create "Headphone Mic Jack Mode" if no input selection is
		* available (or user specifies add_jack_modes hint)
		*/
		if (spec->hp_mic_pin &&
		(spec->auto_mic \|\| spec->input_mux.num_items == 1 \|\|
		spec->add_jack_modes)) {
		err = create_hp_mic_jack_mode(codec, spec->hp_mic_pin);
		if (err < 0)
		return err;
		}

		if (spec->add_jack_modes) {
		if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
		err = create_out_jack_modes(codec, cfg->line_outs,

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