[alsa-devel] [PATCH 3/4] ALSA: hda - hdmi jack created based on pcm

[Takashi Iwai]

On Thu, 31 Dec 2015 02:22:21 +0100,
libin.yang at linux.intel.com wrote:
> 
> From: Libin Yang <libin.yang at linux.intel.com>
> 
> Jack is created based on pcm.
> 
> For dyn_pcm_assign:
>  Driver will not use hda_jack. It will operate snd_jack directly.

This is nothing new, it's already so for Intel codecs (via audio
component).

>  snd_jack pointer will be stored in spec->pcm.jack.

.... instead of the current spec->acomp_jack.


> When pcm is
>  assigned to pin, jack will be assigned to pin automatically.
> 
> For !dyn_pcm_assign:
>  Driver will continue using hda_jack for less impact on the old cases.
>  Pcm is statically assigned to pin. So is jack. spec->pcm.jack will
>  save the snd_jack pointer created in hda_jack.
> 
> Signed-off-by: Libin Yang <libin.yang at linux.intel.com>
(snip)

> -static int generic_hdmi_build_jack(struct hda_codec *codec, int pin_idx)
> +static int generic_hdmi_build_jack(struct hda_codec *codec, int pcm_idx)
>  {
>  	char hdmi_str[32] = "HDMI/DP";
>  	struct hdmi_spec *spec = codec->spec;
> -	struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
> -	int pcmdev = get_pcm_rec(spec, pin_idx).pcm->device;
> +	struct hdmi_spec_per_pin *per_pin;
> +	struct hda_jack_tbl *jack;
> +	int pcmdev = get_pcm_rec(spec, pcm_idx).pcm->device;
>  	bool phantom_jack;
> +	int ret;
>  
>  	if (pcmdev > 0)
>  		sprintf(hdmi_str + strlen(hdmi_str), ",pcm=%d", pcmdev);
> -	if (codec_has_acomp(codec))
> -		return add_acomp_jack_kctl(codec, per_pin, hdmi_str);
> -	phantom_jack = !is_jack_detectable(codec, per_pin->pin_nid);
> -	if (phantom_jack)
> -		strncat(hdmi_str, " Phantom",
> -			sizeof(hdmi_str) - strlen(hdmi_str) - 1);
>  
> -	return snd_hda_jack_add_kctl(codec, per_pin->pin_nid, hdmi_str,
> -				     phantom_jack);
> +	/* for !dyn_pcm_assign, we still use hda_jack for compatibility */
> +	if (!spec->dyn_pcm_assign) {

Actually, the code changes become smaller with the following:

	if (spec->dyn_pcm_assign)
		return add_hdmi_jack_kctl(codec, spec, pcm_idx, hdmi_str);

Then the rest is almost same as the original code, and you'd need to
give a few more comments and assignment of pcm_rec[].jack in
addition.


> @@ -2626,18 +2659,23 @@ static void hdmi_array_free(struct hdmi_spec *spec)
>  static void generic_hdmi_free(struct hda_codec *codec)
>  {
>  	struct hdmi_spec *spec = codec->spec;
> -	int pin_idx;
> +	int pin_idx, pcm_idx;
>  
>  	if (codec_has_acomp(codec))
>  		snd_hdac_i915_register_notifier(NULL);
>  
>  	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
>  		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
> -
>  		cancel_delayed_work_sync(&per_pin->work);
>  		eld_proc_free(per_pin);
> -		if (per_pin->acomp_jack)
> -			snd_device_free(codec->card, per_pin->acomp_jack);
> +	}
> +
> +	for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
> +		if (spec->dyn_pcm_assign)
> +			snd_device_free(codec->card,
> +					spec->pcm_rec[pcm_idx].jack);
> +		else
> +			spec->pcm_rec[pcm_idx].jack = NULL;

Check whether spec->pcm_rec[pcm_idx].jack is NULL beforehand.


Takashi