Commit 56fba41f authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Specify target bias state directly as a bias state 



Rather than a simple flag to say if we want the DAPM context to be at full
power specify the target bias state. This should have no current effect
but is a bit more direct and so makes it easier to change our decisions
about the which bias state to go into in future.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
parent 6dffdea7

include/sound/soc-dapm.h

+1 −1
Original line number Diff line number Diff line
@@ -510,7 +510,7 @@ struct snd_soc_dapm_context { 
	struct snd_soc_card *card; /* parent card */



	/* used during DAPM updates */

	int dev_power;

	enum snd_soc_bias_level target_bias_level;

	struct list_head list;



#ifdef CONFIG_DEBUG_FS

include/sound/soc.h

+4 −4
Original line number Diff line number Diff line
@@ -214,10 +214,10 @@ 
 * @OFF:     Power Off. No restrictions on transition times.

 */

enum snd_soc_bias_level {

	SND_SOC_BIAS_OFF,

	SND_SOC_BIAS_STANDBY,

	SND_SOC_BIAS_PREPARE,

	SND_SOC_BIAS_ON,

	SND_SOC_BIAS_OFF = 0,

	SND_SOC_BIAS_STANDBY = 1,

	SND_SOC_BIAS_PREPARE = 2,

	SND_SOC_BIAS_ON = 3,

};



struct snd_jack;

sound/soc/soc-dapm.c

+33 −27
Original line number Diff line number Diff line
@@ -1042,16 +1042,17 @@ static void dapm_pre_sequence_async(void *data, async_cookie_t cookie) 
	struct snd_soc_dapm_context *d = data;

	int ret;



	if (d->dev_power && d->bias_level == SND_SOC_BIAS_OFF) {

	/* If we're off and we're not supposed to be go into STANDBY */

	if (d->bias_level == SND_SOC_BIAS_OFF &&

	    d->target_bias_level != SND_SOC_BIAS_OFF) {

		ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);

		if (ret != 0)

			dev_err(d->dev,

				"Failed to turn on bias: %d\n", ret);

	}



	/* If we're changing to all on or all off then prepare */

	if ((d->dev_power && d->bias_level == SND_SOC_BIAS_STANDBY) ||

	    (!d->dev_power && d->bias_level == SND_SOC_BIAS_ON)) {

	/* Prepare for a STADDBY->ON or ON->STANDBY transition */

	if (d->bias_level != d->target_bias_level) {

		ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);

		if (ret != 0)

			dev_err(d->dev,
@@ -1068,7 +1069,9 @@ static void dapm_post_sequence_async(void *data, async_cookie_t cookie) 
	int ret;



	/* If we just powered the last thing off drop to standby bias */

	if (d->bias_level == SND_SOC_BIAS_PREPARE && !d->dev_power) {

	if (d->bias_level == SND_SOC_BIAS_PREPARE &&

	    (d->target_bias_level == SND_SOC_BIAS_STANDBY ||

	     d->target_bias_level == SND_SOC_BIAS_OFF)) {

		ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);

		if (ret != 0)

			dev_err(d->dev, "Failed to apply standby bias: %d\n",
@@ -1076,14 +1079,16 @@ static void dapm_post_sequence_async(void *data, async_cookie_t cookie) 
	}



	/* If we're in standby and can support bias off then do that */

	if (d->bias_level == SND_SOC_BIAS_STANDBY && d->idle_bias_off) {

	if (d->bias_level == SND_SOC_BIAS_STANDBY &&

	    d->target_bias_level == SND_SOC_BIAS_OFF) {

		ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);

		if (ret != 0)

			dev_err(d->dev, "Failed to turn off bias: %d\n", ret);

	}



	/* If we just powered up then move to active bias */

	if (d->bias_level == SND_SOC_BIAS_PREPARE && d->dev_power) {

	if (d->bias_level == SND_SOC_BIAS_PREPARE &&

	    d->target_bias_level == SND_SOC_BIAS_ON) {

		ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);

		if (ret != 0)

			dev_err(d->dev, "Failed to apply active bias: %d\n",
@@ -1108,13 +1113,19 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 
	LIST_HEAD(up_list);

	LIST_HEAD(down_list);

	LIST_HEAD(async_domain);

	enum snd_soc_bias_level bias;

	int power;



	trace_snd_soc_dapm_start(card);



	list_for_each_entry(d, &card->dapm_list, list)

		if (d->n_widgets || d->codec == NULL)

			d->dev_power = 0;

	list_for_each_entry(d, &card->dapm_list, list) {

		if (d->n_widgets || d->codec == NULL) {

			if (d->idle_bias_off)

				d->target_bias_level = SND_SOC_BIAS_OFF;

			else

				d->target_bias_level = SND_SOC_BIAS_STANDBY;

		}

	}



	/* Check which widgets we need to power and store them in

	 * lists indicating if they should be powered up or down.
@@ -1137,7 +1148,7 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 
			else

				power = 1;

			if (power)

				w->dapm->dev_power = 1;

				w->dapm->target_bias_level = SND_SOC_BIAS_ON;



			if (w->power == power)

				continue;
@@ -1161,24 +1172,19 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 
		switch (event) {

		case SND_SOC_DAPM_STREAM_START:

		case SND_SOC_DAPM_STREAM_RESUME:

			dapm->dev_power = 1;

			dapm->target_bias_level = SND_SOC_BIAS_ON;

			break;

		case SND_SOC_DAPM_STREAM_STOP:

			dapm->dev_power = !!dapm->codec->active;

			if (dapm->codec->active)

				dapm->target_bias_level = SND_SOC_BIAS_ON;

			else

				dapm->target_bias_level = SND_SOC_BIAS_STANDBY;

			break;

		case SND_SOC_DAPM_STREAM_SUSPEND:

			dapm->dev_power = 0;

			dapm->target_bias_level = SND_SOC_BIAS_STANDBY;

			break;

		case SND_SOC_DAPM_STREAM_NOP:

			switch (dapm->bias_level) {

				case SND_SOC_BIAS_STANDBY:

				case SND_SOC_BIAS_OFF:

					dapm->dev_power = 0;

					break;

				default:

					dapm->dev_power = 1;

					break;

			}

			dapm->target_bias_level = dapm->bias_level;

			break;

		default:

			break;
@@ -1186,12 +1192,12 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 
	}



	/* Force all contexts in the card to the same bias state */

	power = 0;

	bias = SND_SOC_BIAS_OFF;

	list_for_each_entry(d, &card->dapm_list, list)

		if (d->dev_power)

			power = 1;

		if (d->target_bias_level > bias)

			bias = d->target_bias_level;

	list_for_each_entry(d, &card->dapm_list, list)

		d->dev_power = power;

		d->target_bias_level = bias;





	/* Run all the bias changes in parallel */

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