ASoC: dapm: add a dapm sink widget
DAPM models various widgets but lacks a sink widget.
DSPs can have modules which take audio data, process it and are
capable of generating events thus acting as a sink of data.
To make the dapm graph complete for such paths we need a dapm
sink widget for these modules, so add a SND_SOC_DAPM_SINK to
declare such a widget. This widget will be treated as
SND_SOC_DAPM_EP_SINK endpoint in the dapm graph
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 7855cfe..fe19dd3 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -49,6 +49,9 @@
#define SND_SOC_DAPM_SIGGEN(wname) \
{ .id = snd_soc_dapm_siggen, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
+#define SND_SOC_DAPM_SINK(wname) \
+{ .id = snd_soc_dapm_sink, .name = wname, .kcontrol_news = NULL, \
+ .num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_INPUT(wname) \
{ .id = snd_soc_dapm_input, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
@@ -484,6 +487,7 @@
snd_soc_dapm_aif_in, /* audio interface input */
snd_soc_dapm_aif_out, /* audio interface output */
snd_soc_dapm_siggen, /* signal generator */
+ snd_soc_dapm_sink,
snd_soc_dapm_dai_in, /* link to DAI structure */
snd_soc_dapm_dai_out,
snd_soc_dapm_dai_link, /* link between two DAI structures */
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 016eba1..6760044 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -3351,6 +3351,11 @@
w->is_ep = SND_SOC_DAPM_EP_SOURCE;
w->power_check = dapm_always_on_check_power;
break;
+ case snd_soc_dapm_sink:
+ w->is_ep = SND_SOC_DAPM_EP_SINK;
+ w->power_check = dapm_always_on_check_power;
+ break;
+
case snd_soc_dapm_mux:
case snd_soc_dapm_demux:
case snd_soc_dapm_switch:
