Commit 80114129 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: dapm: Provide early event callbacks for power up and down 



Some devices may benefit from being able to start some parts of the widget
power up/down sequence earlier on in the sequence than the point at which
the final power state is committed. Support these by providing events which
are called before any power state changes are done.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <liam.r.girdwood@linux.intel.com>
parent 10e8aa9a

include/sound/soc-dapm.h

+2 −0
Original line number Diff line number Diff line
@@ -311,6 +311,8 @@ struct device; 
#define SND_SOC_DAPM_POST_PMD	0x8		/* after widget power down */

#define SND_SOC_DAPM_PRE_REG	0x10	/* before audio path setup */

#define SND_SOC_DAPM_POST_REG	0x20	/* after audio path setup */

#define SND_SOC_DAPM_WILL_PMU   0x40    /* called at start of sequence */

#define SND_SOC_DAPM_WILL_PMD   0x80    /* called at start of sequence */

#define SND_SOC_DAPM_PRE_POST_PMD \

				(SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD)

sound/soc/soc-dapm.c

+16 −0
Original line number Diff line number Diff line
@@ -1277,6 +1277,14 @@ static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm, 
		ev_name = "POST_PMD";

		power = 0;

		break;

	case SND_SOC_DAPM_WILL_PMU:

		ev_name = "WILL_PMU";

		power = 1;

		break;

	case SND_SOC_DAPM_WILL_PMD:

		ev_name = "WILL_PMD";

		power = 0;

		break;

	default:

		BUG();

		return;
@@ -1737,6 +1745,14 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 
					&async_domain);

	async_synchronize_full_domain(&async_domain);



	list_for_each_entry(w, &down_list, list) {

		dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMD);

	}



	list_for_each_entry(w, &up_list, list) {

		dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMU);

	}



	/* Power down widgets first; try to avoid amplifying pops. */

	dapm_seq_run(dapm, &down_list, event, false);

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