[alsa-devel] [PATCH] ALSA: hda/ca0132 - Delay HP amp turnon.

[Takashi Iwai]

At Mon, 25 Mar 2013 10:39:23 -0700,
Dylan Reid wrote:
> 
> From: Chih-Chung Chang <chihchung at chromium.org>
> 
> Turing on the headphone amp interferes with the impedance measurement
> used to detect a TRRS style headset microphone.  Delay the HP turn on
> until 500ms after the jack is detected, allowing the mic detection
> state machine to run to completion.
> 
> Signed-off-by: Chih-Chung Chang <chihchung at chromium.org>
> Signed-off-by: Dylan Reid <dgreid at chromium.org>

Thanks, applied.


Takashi


> ---
>  sound/pci/hda/patch_ca0132.c | 27 +++++++++++++++++++++++----
>  1 file changed, 23 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
> index 0792b57..12eb21a 100644
> --- a/sound/pci/hda/patch_ca0132.c
> +++ b/sound/pci/hda/patch_ca0132.c
> @@ -741,6 +741,9 @@ struct ca0132_spec {
>  	long voicefx_val;
>  	long cur_mic_boost;
>  
> +	struct hda_codec *codec;
> +	struct delayed_work unsol_hp_work;
> +
>  #ifdef ENABLE_TUNING_CONTROLS
>  	long cur_ctl_vals[TUNING_CTLS_COUNT];
>  #endif
> @@ -3227,6 +3230,14 @@ exit:
>  	return err < 0 ? err : 0;
>  }
>  
> +static void ca0132_unsol_hp_delayed(struct work_struct *work)
> +{
> +	struct ca0132_spec *spec = container_of(
> +		to_delayed_work(work), struct ca0132_spec, unsol_hp_work);
> +	ca0132_select_out(spec->codec);
> +	snd_hda_jack_report_sync(spec->codec);
> +}
> +
>  static void ca0132_set_dmic(struct hda_codec *codec, int enable);
>  static int ca0132_mic_boost_set(struct hda_codec *codec, long val);
>  static int ca0132_effects_set(struct hda_codec *codec, hda_nid_t nid, long val);
> @@ -4399,8 +4410,7 @@ static void ca0132_process_dsp_response(struct hda_codec *codec)
>  
>  static void ca0132_unsol_event(struct hda_codec *codec, unsigned int res)
>  {
> -	snd_printdd(KERN_INFO "ca0132_unsol_event: 0x%x\n", res);
> -
> +	struct ca0132_spec *spec = codec->spec;
>  
>  	if (((res >> AC_UNSOL_RES_TAG_SHIFT) & 0x3f) == UNSOL_TAG_DSP) {
>  		ca0132_process_dsp_response(codec);
> @@ -4412,8 +4422,13 @@ static void ca0132_unsol_event(struct hda_codec *codec, unsigned int res)
>  
>  		switch (res) {
>  		case UNSOL_TAG_HP:
> -			ca0132_select_out(codec);
> -			snd_hda_jack_report_sync(codec);
> +			/* Delay enabling the HP amp, to let the mic-detection
> +			 * state machine run.
> +			 */
> +			cancel_delayed_work_sync(&spec->unsol_hp_work);
> +			queue_delayed_work(codec->bus->workq,
> +					   &spec->unsol_hp_work,
> +					   msecs_to_jiffies(500));
>  			break;
>  		case UNSOL_TAG_AMIC1:
>  			ca0132_select_mic(codec);
> @@ -4588,6 +4603,7 @@ static void ca0132_free(struct hda_codec *codec)
>  {
>  	struct ca0132_spec *spec = codec->spec;
>  
> +	cancel_delayed_work_sync(&spec->unsol_hp_work);
>  	snd_hda_power_up(codec);
>  	snd_hda_sequence_write(codec, spec->base_exit_verbs);
>  	ca0132_exit_chip(codec);
> @@ -4653,6 +4669,7 @@ static int patch_ca0132(struct hda_codec *codec)
>  	if (!spec)
>  		return -ENOMEM;
>  	codec->spec = spec;
> +	spec->codec = codec;
>  
>  	spec->num_mixers = 1;
>  	spec->mixers[0] = ca0132_mixer;
> @@ -4663,6 +4680,8 @@ static int patch_ca0132(struct hda_codec *codec)
>  	spec->init_verbs[1] = ca0132_init_verbs1;
>  	spec->num_init_verbs = 2;
>  
> +	INIT_DELAYED_WORK(&spec->unsol_hp_work, ca0132_unsol_hp_delayed);
> +
>  	ca0132_init_chip(codec);
>  
>  	ca0132_config(codec);
> -- 
> 1.8.1.3.605.g02339dd
>