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// SPDX-License-Identifier: GPL-2.0
/* Helper functions for Dell Mic Mute LED control;
* to be included from codec driver
*/
#if IS_ENABLED(CONFIG_DELL_LAPTOP)
#include <linux/dell-led.h>
enum {
MICMUTE_LED_ON,
MICMUTE_LED_OFF,
MICMUTE_LED_FOLLOW_CAPTURE,
MICMUTE_LED_FOLLOW_MUTE,
};
static int dell_led_mode = MICMUTE_LED_FOLLOW_MUTE;
static int dell_capture;
static int dell_led_value;
static int (*dell_micmute_led_set_func)(int);
static void (*dell_old_cap_hook)(struct hda_codec *,
struct snd_kcontrol *,
struct snd_ctl_elem_value *);
static void call_micmute_led_update(void)
{
int val;
switch (dell_led_mode) {
case MICMUTE_LED_ON:
val = 1;
break;
case MICMUTE_LED_OFF:
val = 0;
break;
case MICMUTE_LED_FOLLOW_CAPTURE:
val = dell_capture;
break;
case MICMUTE_LED_FOLLOW_MUTE:
default:
val = !dell_capture;
break;
}
if (val == dell_led_value)
return;
dell_led_value = val;
dell_micmute_led_set_func(dell_led_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_micmute_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? */
dell_capture = (ucontrol->value.integer.value[0] ||
ucontrol->value.integer.value[1]);
call_micmute_led_update();
}
}
static int dell_mic_mute_led_mode_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static const char * const texts[] = {
"On", "Off", "Follow Capture", "Follow Mute",
};
return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
}
static int dell_mic_mute_led_mode_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = dell_led_mode;
return 0;
}
static int dell_mic_mute_led_mode_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
unsigned int mode;
mode = ucontrol->value.enumerated.item[0];
if (mode > MICMUTE_LED_FOLLOW_MUTE)
mode = MICMUTE_LED_FOLLOW_MUTE;
if (mode == dell_led_mode)
return 0;
dell_led_mode = mode;
call_micmute_led_update();
return 1;
}
static const struct snd_kcontrol_new dell_mic_mute_mode_ctls[] = {
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Mic Mute-LED Mode",
.info = dell_mic_mute_led_mode_info,
.get = dell_mic_mute_led_mode_get,
.put = dell_mic_mute_led_mode_put,
},
{}
};
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_micmute_led_set_func)
dell_micmute_led_set_func = symbol_request(dell_micmute_led_set);
if (!dell_micmute_led_set_func) {
codec_warn(codec, "Failed to find dell wmi symbol dell_micmute_led_set\n");
return;
}
removefunc = true;
if (dell_micmute_led_set_func(false) >= 0) {
dell_led_value = 0;
if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
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;
add_mixer(spec, dell_mic_mute_mode_ctls);
}
}
}
if (dell_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
symbol_put(dell_micmute_led_set);
dell_micmute_led_set_func = NULL;
dell_old_cap_hook = NULL;
}
}
#else /* CONFIG_DELL_LAPTOP */
static void alc_fixup_dell_wmi(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
}
#endif /* CONFIG_DELL_LAPTOP */
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