mirror of https://gitee.com/openkylin/linux.git
153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Helper functions for Dell Mic Mute LED control;
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* to be included from codec driver
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*/
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#if IS_ENABLED(CONFIG_DELL_LAPTOP)
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#include <linux/dell-led.h>
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enum {
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MICMUTE_LED_ON,
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MICMUTE_LED_OFF,
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MICMUTE_LED_FOLLOW_CAPTURE,
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MICMUTE_LED_FOLLOW_MUTE,
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};
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static int dell_led_mode = MICMUTE_LED_FOLLOW_MUTE;
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static int dell_capture;
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static int dell_led_value;
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static int (*dell_micmute_led_set_func)(int);
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static void (*dell_old_cap_hook)(struct hda_codec *,
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struct snd_kcontrol *,
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struct snd_ctl_elem_value *);
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static void call_micmute_led_update(void)
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{
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int val;
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switch (dell_led_mode) {
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case MICMUTE_LED_ON:
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val = 1;
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break;
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case MICMUTE_LED_OFF:
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val = 0;
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break;
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case MICMUTE_LED_FOLLOW_CAPTURE:
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val = dell_capture;
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break;
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case MICMUTE_LED_FOLLOW_MUTE:
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default:
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val = !dell_capture;
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break;
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}
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if (val == dell_led_value)
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return;
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dell_led_value = val;
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dell_micmute_led_set_func(dell_led_value);
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}
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static void update_dell_wmi_micmute_led(struct hda_codec *codec,
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struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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if (dell_old_cap_hook)
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dell_old_cap_hook(codec, kcontrol, ucontrol);
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if (!ucontrol || !dell_micmute_led_set_func)
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return;
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if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
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/* TODO: How do I verify if it's a mono or stereo here? */
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dell_capture = (ucontrol->value.integer.value[0] ||
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ucontrol->value.integer.value[1]);
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call_micmute_led_update();
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}
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}
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static int dell_mic_mute_led_mode_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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static const char * const texts[] = {
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"On", "Off", "Follow Capture", "Follow Mute",
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};
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return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
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}
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static int dell_mic_mute_led_mode_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.enumerated.item[0] = dell_led_mode;
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return 0;
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}
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static int dell_mic_mute_led_mode_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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unsigned int mode;
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mode = ucontrol->value.enumerated.item[0];
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if (mode > MICMUTE_LED_FOLLOW_MUTE)
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mode = MICMUTE_LED_FOLLOW_MUTE;
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if (mode == dell_led_mode)
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return 0;
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dell_led_mode = mode;
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call_micmute_led_update();
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return 1;
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}
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static const struct snd_kcontrol_new dell_mic_mute_mode_ctls[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Mic Mute-LED Mode",
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.info = dell_mic_mute_led_mode_info,
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.get = dell_mic_mute_led_mode_get,
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.put = dell_mic_mute_led_mode_put,
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},
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{}
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};
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static void alc_fixup_dell_wmi(struct hda_codec *codec,
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const struct hda_fixup *fix, int action)
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{
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struct alc_spec *spec = codec->spec;
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bool removefunc = false;
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if (action == HDA_FIXUP_ACT_PROBE) {
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if (!dell_micmute_led_set_func)
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dell_micmute_led_set_func = symbol_request(dell_micmute_led_set);
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if (!dell_micmute_led_set_func) {
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codec_warn(codec, "Failed to find dell wmi symbol dell_micmute_led_set\n");
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return;
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}
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removefunc = true;
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if (dell_micmute_led_set_func(false) >= 0) {
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dell_led_value = 0;
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if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
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codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
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else {
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dell_old_cap_hook = spec->gen.cap_sync_hook;
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spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
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removefunc = false;
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add_mixer(spec, dell_mic_mute_mode_ctls);
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}
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}
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}
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if (dell_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
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symbol_put(dell_micmute_led_set);
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dell_micmute_led_set_func = NULL;
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dell_old_cap_hook = NULL;
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}
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}
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#else /* CONFIG_DELL_LAPTOP */
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static void alc_fixup_dell_wmi(struct hda_codec *codec,
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const struct hda_fixup *fix, int action)
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{
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}
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#endif /* CONFIG_DELL_LAPTOP */
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