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ASoC: soc-dapm: Introduce the new snd_soc_dapm_virt_mux type

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This new type is a virtual version of snd_soc_dapm_mux.  It is used
when a backing register value is not necessary for deciding which
input path to connect.  A simple virtual enumeration control e.g.
SOC_DAPM_ENUM_VIRT() can be exposed to userspace which will be used
to choose which path to connect.

The snd_soc_dapm_virt_mux type ensures that during the initial
path setup, the first (which is also the default) input path will
be connected.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos 2010-12-16 15:53:39 +00:00 committed by Mark Brown
parent 1ec9bc35a6
commit 24ff33ac69
2 changed files with 28 additions and 0 deletions
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9
include/sound/soc-dapm.h
View File

@ -93,6 +93,9 @@
#define SND_SOC_DAPM_MUX(wname, wreg, wshift, winvert, wcontrols) \
{ .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_VIRT_MUX(wname, wreg, wshift, winvert, wcontrols) \
{ .id = snd_soc_dapm_virt_mux, .name = wname, .reg = wreg, .shift = wshift, \
.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_VALUE_MUX(wname, wreg, wshift, winvert, wcontrols) \
{ .id = snd_soc_dapm_value_mux, .name = wname, .reg = wreg, \
.shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
@ -148,6 +151,11 @@
{ .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_VIRT_MUX_E(wname, wreg, wshift, winvert, wcontrols, \
wevent, wflags) \
{ .id = snd_soc_dapm_virt_mux, .name = wname, .reg = wreg, .shift = wshift, \
.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
.event = wevent, .event_flags = wflags}
/* Simplified versions of above macros, assuming wncontrols = ARRAY_SIZE(wcontrols) */
#define SOC_PGA_E_ARRAY(wname, wreg, wshift, winvert, wcontrols, \
@ -357,6 +365,7 @@ enum snd_soc_dapm_type {
snd_soc_dapm_input = 0, /* input pin */
snd_soc_dapm_output, /* output pin */
snd_soc_dapm_mux, /* selects 1 analog signal from many inputs */
snd_soc_dapm_virt_mux, /* virtual version of snd_soc_dapm_mux */
snd_soc_dapm_value_mux, /* selects 1 analog signal from many inputs */
snd_soc_dapm_mixer, /* mixes several analog signals together */
snd_soc_dapm_mixer_named_ctl, /* mixer with named controls */

19
sound/soc/soc-dapm.c
View File

@ -56,6 +56,7 @@ static int dapm_up_seq[] = {
[snd_soc_dapm_aif_out] = 3,
[snd_soc_dapm_mic] = 4,
[snd_soc_dapm_mux] = 5,
[snd_soc_dapm_virt_mux] = 5,
[snd_soc_dapm_value_mux] = 5,
[snd_soc_dapm_dac] = 6,
[snd_soc_dapm_mixer] = 7,
@ -81,6 +82,7 @@ static int dapm_down_seq[] = {
[snd_soc_dapm_mic] = 7,
[snd_soc_dapm_micbias] = 8,
[snd_soc_dapm_mux] = 9,
[snd_soc_dapm_virt_mux] = 9,
[snd_soc_dapm_value_mux] = 9,
[snd_soc_dapm_aif_in] = 10,
[snd_soc_dapm_aif_out] = 10,
@ -216,6 +218,20 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
}
}
break;
case snd_soc_dapm_virt_mux: {
struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
p->connect = 0;
/* since a virtual mux has no backing registers to
* decide which path to connect, it will try to match
* with the first enumeration. This is to ensure
* that the default mux choice (the first) will be
* correctly powered up during initialization.
*/
if (!strcmp(p->name, e->texts[0]))
p->connect = 1;
}
break;
case snd_soc_dapm_value_mux: {
struct soc_enum *e = (struct soc_enum *)
w->kcontrols[i].private_value;
@ -1228,6 +1244,7 @@ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
int found = 0;
if (widget->id != snd_soc_dapm_mux &&
widget->id != snd_soc_dapm_virt_mux &&
widget->id != snd_soc_dapm_value_mux)
return -ENODEV;
@ -1534,6 +1551,7 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
path->connect = 1;
return 0;
case snd_soc_dapm_mux:
case snd_soc_dapm_virt_mux:
case snd_soc_dapm_value_mux:
ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
&wsink->kcontrols[0]);
@ -1623,6 +1641,7 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
dapm_new_mixer(dapm, w);
break;
case snd_soc_dapm_mux:
case snd_soc_dapm_virt_mux:
case snd_soc_dapm_value_mux:
w->power_check = dapm_generic_check_power;
dapm_new_mux(dapm, w);