77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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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_LEDS_DELL_NETBOOKS)
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#include <linux/dell-led.h>
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static int dell_led_value;
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static int (*dell_led_set_func)(int, 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 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_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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int val = (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) ? 0 : 1;
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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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if (dell_led_set_func)
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dell_led_set_func(DELL_LED_MICMUTE, dell_led_value);
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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_led_set_func)
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dell_led_set_func = symbol_request(dell_app_wmi_led_set);
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if (!dell_led_set_func) {
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codec_warn(codec, "Failed to find dell wmi symbol dell_app_wmi_led_set\n");
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return;
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}
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removefunc = true;
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if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) {
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dell_led_value = 0;
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if (spec->gen.num_adc_nids > 1)
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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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}
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}
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}
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if (dell_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
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symbol_put(dell_app_wmi_led_set);
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dell_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_LEDS_DELL_NETBOOKS */
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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_LEDS_DELL_NETBOOKS */
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