[alsa-devel] [PATCH] ALSA: hda - Introduce "Headset Mic" name

[David Henningsson]

On 03/21/2013 11:44 AM, Takashi Iwai wrote:
> At Thu, 21 Mar 2013 11:32:57 +0100,
> David Henningsson wrote:
>>
>> Headset mic jacks, i e TRRS style jacks with Headphone Left,
>> Headphone Right, Mic and GND signals, are becoming increasingly
>> common and are now being shipped by several manufacturers.
>>
>> Unfortunately, the HDA specification does not give us any hint
>> of whether a Mic pin belongs to such a jack or not, but it would
>> still be helpful for the user to know (especially if there is one
>> TRS Mic jack and one TRRS headset jack).
>>
>> This new fixup causes the first (non-dock, non-internal) mic to
>> be a headset mic jack. The algorithm can be later refined if needed.
>>
>> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
>> ---
>>   sound/pci/hda/hda_auto_parser.c |   24 ++++++++++++++++++++++--
>>   sound/pci/hda/hda_auto_parser.h |    2 ++
>>   sound/pci/hda/patch_sigmatel.c  |    6 +++++-
>>   3 files changed, 29 insertions(+), 3 deletions(-)
>>
>> diff --git a/sound/pci/hda/hda_auto_parser.c b/sound/pci/hda/hda_auto_parser.c
>> index a3ea76a..6b173b3 100644
>> --- a/sound/pci/hda/hda_auto_parser.c
>> +++ b/sound/pci/hda/hda_auto_parser.c
>> @@ -260,6 +260,22 @@ int snd_hda_parse_pin_defcfg(struct hda_codec *codec,
>>   		}
>>   	}
>>
>> +	/* Take first mic to be a headset mic pin */
>> +	if (cond_flags & HDA_PINCFG_HEADSET_MIC) {
>> +		for (i = 0; i < cfg->num_inputs; i++) {
>> +			int attr;
>> +			unsigned int def_conf;
>> +			if (cfg->inputs[i].type != AUTO_PIN_MIC)
>> +				continue;
>> +			def_conf = snd_hda_codec_get_pincfg(codec, cfg->inputs[i].pin);
>> +			attr = snd_hda_get_input_pin_attr(def_conf);
>> +			if (attr <= INPUT_PIN_ATTR_DOCK)
>> +				continue;
>> +			cfg->inputs[i].is_headset_mic = 1;
>> +			break;
>> +		}
>> +	}
>> +
>>   	/* FIX-UP:
>>   	 * If no line-out is defined but multiple HPs are found,
>>   	 * some of them might be the real line-outs.
>> @@ -388,6 +404,7 @@ EXPORT_SYMBOL_HDA(snd_hda_get_input_pin_attr);
>>    */
>>
>>   static const char *hda_get_input_pin_label(struct hda_codec *codec,
>> +					   const struct auto_pin_cfg_item *item,
>>   					   hda_nid_t pin, bool check_location)
>>   {
>>   	unsigned int def_conf;
>> @@ -400,6 +417,8 @@ static const char *hda_get_input_pin_label(struct hda_codec *codec,
>>
>>   	switch (get_defcfg_device(def_conf)) {
>>   	case AC_JACK_MIC_IN:
>> +		if (item && item->is_headset_mic)
>> +			return "Headset Mic";
>>   		if (!check_location)
>>   			return "Mic";
>>   		attr = snd_hda_get_input_pin_attr(def_conf);
>> @@ -480,7 +499,8 @@ const char *hda_get_autocfg_input_label(struct hda_codec *codec,
>>   		has_multiple_pins = 1;
>>   	if (has_multiple_pins && type == AUTO_PIN_MIC)
>>   		has_multiple_pins &= check_mic_location_need(codec, cfg, input);
>> -	return hda_get_input_pin_label(codec, cfg->inputs[input].pin,
>> +	return hda_get_input_pin_label(codec, &cfg->inputs[input],
>> +				       cfg->inputs[input].pin,
>>   				       has_multiple_pins);
>>   }
>>   EXPORT_SYMBOL_HDA(hda_get_autocfg_input_label);
>> @@ -649,7 +669,7 @@ int snd_hda_get_pin_label(struct hda_codec *codec, hda_nid_t nid,
>>   			}
>>   		}
>>   		if (!name)
>> -			name = hda_get_input_pin_label(codec, nid, true);
>> +			name = hda_get_input_pin_label(codec, NULL, nid, true);
>>   		break;
>>   	}
>>   	if (!name)
>> diff --git a/sound/pci/hda/hda_auto_parser.h b/sound/pci/hda/hda_auto_parser.h
>> index f748071..98a72d0 100644
>> --- a/sound/pci/hda/hda_auto_parser.h
>> +++ b/sound/pci/hda/hda_auto_parser.h
>> @@ -36,6 +36,7 @@ enum {
>>   struct auto_pin_cfg_item {
>>   	hda_nid_t pin;
>>   	int type;
>> +	int is_headset_mic:1;
>
> Use unsigned int for bit-fields.  Otherwise you'll hit a mess of
> signedness.

Ok, will fix.

>
>
>>   };
>>
>>   struct auto_pin_cfg;
>> @@ -80,6 +81,7 @@ struct auto_pin_cfg {
>>   /* bit-flags for snd_hda_parse_pin_def_config() behavior */
>>   #define HDA_PINCFG_NO_HP_FIXUP	(1 << 0) /* no HP-split */
>>   #define HDA_PINCFG_NO_LO_FIXUP	(1 << 1) /* don't take other outs as LO */
>> +#define HDA_PINCFG_HEADSET_MIC  (1 << 2) /* Take first mic as headset mic */
>>
>>   int snd_hda_parse_pin_defcfg(struct hda_codec *codec,
>>   			     struct auto_pin_cfg *cfg,
>> diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
>> index 3be877b..1d9d642 100644
>> --- a/sound/pci/hda/patch_sigmatel.c
>> +++ b/sound/pci/hda/patch_sigmatel.c
>> @@ -3528,8 +3528,12 @@ static int stac_parse_auto_config(struct hda_codec *codec)
>>   {
>>   	struct sigmatel_spec *spec = codec->spec;
>>   	int err;
>> +	int flags = 0;
>>
>> -	err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL, 0);
>> +	if (spec->headset_jack)
>> +		flags |= HDA_PINCFG_HEADSET_MIC;
>> +
>> +	err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL, flags);
>>   	if (err < 0)
>>   		return err;
>
>
> The definition of spec->headset_jack is missing?

It was added in sigmatel_spec in Oct 2012. If you prefer, I could send 
the changes to patch_sigmatel in a separate patch?


-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic