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Commit 6ea31b9f authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Factor out DAPM power checks for DACs and ADCs 



This also switches us to using a switch statement for the widget type
in dapm_power_widget().

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent cd0f2d47

sound/soc/soc-dapm.c

+48 −33
Original line number Diff line number Diff line
@@ -594,6 +594,34 @@ static int dapm_generic_check_power(struct snd_soc_dapm_widget *w) 
	return out != 0 && in != 0;

}



/* Check to see if an ADC has power */

static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)

{

	int in;



	if (w->active) {

		in = is_connected_input_ep(w);

		dapm_clear_walk(w->codec);

		return in != 0;

	} else {

		return dapm_generic_check_power(w);

	}

}



/* Check to see if a DAC has power */

static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)

{

	int out;



	if (w->active) {

		out = is_connected_output_ep(w);

		dapm_clear_walk(w->codec);

		return out != 0;

	} else {

		return dapm_generic_check_power(w);

	}

}



/*

 * Scan a single DAPM widget for a complete audio path and update the

 * power status appropriately.
@@ -601,36 +629,23 @@ static int dapm_generic_check_power(struct snd_soc_dapm_widget *w) 
static int dapm_power_widget(struct snd_soc_codec *codec, int event,

			     struct snd_soc_dapm_widget *w)

{

	int in, out, power_change, power, ret;

	int power, ret;



	/* vmid - no action */

	if (w->id == snd_soc_dapm_vmid)

	/* Work out the new power state */

	switch (w->id) {

	case snd_soc_dapm_vmid:

		/* No action required */

		return 0;



	/* active ADC */

	if (w->id == snd_soc_dapm_adc && w->active) {

		in = is_connected_input_ep(w);

		dapm_clear_walk(w->codec);

		power = (in != 0) ? 1 : 0;

		if (power == w->power)

			return 0;

		w->power = power;

		return dapm_generic_apply_power(w);

	}

	case snd_soc_dapm_adc:

		power = dapm_adc_check_power(w);

		break;



	/* active DAC */

	if (w->id == snd_soc_dapm_dac && w->active) {

		out = is_connected_output_ep(w);

		dapm_clear_walk(w->codec);

		power = (out != 0) ? 1 : 0;

		if (power == w->power)

			return 0;

		w->power = power;

		return dapm_generic_apply_power(w);

	}

	case snd_soc_dapm_dac:

		power = dapm_dac_check_power(w);

		break;



	/* pre and post event widgets */

	if (w->id == snd_soc_dapm_pre) {

	case snd_soc_dapm_pre:

		if (!w->event)

			return 0;
@@ -646,8 +661,8 @@ static int dapm_power_widget(struct snd_soc_codec *codec, int event, 
				return ret;

		}

		return 0;

	}

	if (w->id == snd_soc_dapm_post) {



	case snd_soc_dapm_post:

		if (!w->event)

			return 0;
@@ -663,15 +678,15 @@ static int dapm_power_widget(struct snd_soc_codec *codec, int event, 
				return ret;

		}

		return 0;

	}



	/* all other widgets */

	default:

		power = dapm_generic_check_power(w);

	power_change = (w->power == power) ? 0 : 1;

	w->power = power;

		break;

	}



	if (!power_change)

	if (w->power == power)

		return 0;

	w->power = power;



	return dapm_generic_apply_power(w);

}