diff options
| author | Dimitris Papastamos <dp@opensource.wolfsonmicro.com> | 2010-12-16 15:53:39 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-12-17 17:36:28 +0000 |
| commit | 24ff33ac696802e478714480f505c00a50a89c75 (patch) | |
| tree | 3b2e9d3232331b556b2f4cb423dae1ead5565e0c /sound | |
| parent | 1ec9bc35a6a01555836fa1e4d0f00a3501835b0b (diff) | |
ASoC: soc-dapm: Introduce the new snd_soc_dapm_virt_mux type
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/soc-dapm.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 1debc3b0566..50f5c785cb6 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -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); |