greybus: audio: topology: Add helper API to map controlid with widget name

This API is used by enumerated controls .get/.set callback functions to
fetch control id associated with a widget.

Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Reviewed-by: Mark Greer <mark.greer@animalcreek.com>
Signed-off-by: Alex Elder <elder@linaro.org>

diff --git a/drivers/staging/greybus/audio_codec.h b/drivers/staging/greybus/audio_codec.h
index 5a19467..f4936f1 100644 (file)
--- a/drivers/staging/greybus/audio_codec.h
+++ b/drivers/staging/greybus/audio_codec.h
@@ -123,6 +123,7 @@ struct gbaudio_widget {
 struct gbaudio_control {
        __u8 id;
        char *name;
+       char *wname;
        const char * const *texts;
        struct list_head list;
 };

diff --git a/drivers/staging/greybus/audio_topology.c b/drivers/staging/greybus/audio_topology.c
index 1f9e8b6..1bc9874 100644 (file)
--- a/drivers/staging/greybus/audio_topology.c
+++ b/drivers/staging/greybus/audio_topology.c
@@ -77,6 +77,20 @@ static const char *gbaudio_map_controlid(struct gbaudio_module_info *module,
        return NULL;
 }
 
+static int gbaudio_map_wcontrolname(struct gbaudio_module_info *module,
+                                         const char *name)
+{
+       struct gbaudio_control *control;
+
+       list_for_each_entry(control, &module->widget_ctl_list, list) {
+               if (!strncmp(control->wname, name, NAME_SIZE))
+                       return control->id;
+       }
+       dev_warn(module->dev, "%s: missing in modules controls list\n", name);
+
+       return -EINVAL;
+}
+
 static int gbaudio_map_widgetname(struct gbaudio_module_info *module,
                                          const char *name)
 {
@@ -652,6 +666,8 @@ static int gbaudio_tplg_create_widget(struct gbaudio_module_info *module,
                }
                control->id = curr->id;
                control->name = curr->name;
+               control->wname = w->name;
+
                if (curr->info.type == GB_AUDIO_CTL_ELEM_TYPE_ENUMERATED)
                        control->texts = (const char * const *)
                                curr->info.value.enumerated.names;