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/* Helper functions for Dell Mic Mute LED control;
* to be included from codec driver
*/
#if IS_ENABLED(CONFIG_LEDS_DELL_NETBOOKS)
#include <linux/dell-led.h>
static int dell_led_value;
static int (*dell_led_set_func)(int, int);
static void (*dell_old_cap_hook)(struct hda_codec *,
struct snd_kcontrol *,
struct snd_ctl_elem_value *);
static void update_dell_wmi_micmute_led(struct hda_codec *codec,
struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
if (dell_old_cap_hook)
dell_old_cap_hook(codec, kcontrol, ucontrol);
if (!ucontrol || !dell_led_set_func)
return;
if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
/* TODO: How do I verify if it's a mono or stereo here? */
int val = (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) ? 0 : 1;
if (val == dell_led_value)
return;
dell_led_value = val;
if (dell_led_set_func)
dell_led_set_func(DELL_LED_MICMUTE, dell_led_value);
}
}
static void alc_fixup_dell_wmi(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
struct alc_spec *spec = codec->spec;
bool removefunc = false;
if (action == HDA_FIXUP_ACT_PROBE) {
if (!dell_led_set_func)
dell_led_set_func = symbol_request(dell_app_wmi_led_set);
if (!dell_led_set_func) {
codec_warn(codec, "Failed to find dell wmi symbol dell_app_wmi_led_set\n");
return;
}
removefunc = true;
if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) {
dell_led_value = 0;
if (spec->gen.num_adc_nids > 1)
codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
else {
dell_old_cap_hook = spec->gen.cap_sync_hook;
spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
removefunc = false;
}
}
}
if (dell_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
symbol_put(dell_app_wmi_led_set);
dell_led_set_func = NULL;
dell_old_cap_hook = NULL;
}
}
#else /* CONFIG_LEDS_DELL_NETBOOKS */
static void alc_fixup_dell_wmi(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
}
#endif /* CONFIG_LEDS_DELL_NETBOOKS */
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