| Hui Wang | 00ef994 | 2014-07-31 11:52:38 +0800 | [diff] [blame] | 1 | /* Helper functions for Dell Mic Mute LED control; |
| 2 | * to be included from codec driver |
| 3 | */ |
| 4 | |
| 5 | #if IS_ENABLED(CONFIG_LEDS_DELL_NETBOOKS) |
| 6 | #include <linux/dell-led.h> |
| 7 | |
| 8 | static int dell_led_value; |
| 9 | static int (*dell_led_set_func)(int, int); |
| 10 | static void (*dell_old_cap_hook)(struct hda_codec *, |
| 11 | struct snd_kcontrol *, |
| 12 | struct snd_ctl_elem_value *); |
| 13 | |
| 14 | static void update_dell_wmi_micmute_led(struct hda_codec *codec, |
| 15 | struct snd_kcontrol *kcontrol, |
| 16 | struct snd_ctl_elem_value *ucontrol) |
| 17 | { |
| 18 | if (dell_old_cap_hook) |
| 19 | dell_old_cap_hook(codec, kcontrol, ucontrol); |
| 20 | |
| 21 | if (!ucontrol || !dell_led_set_func) |
| 22 | return; |
| 23 | if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) { |
| 24 | /* TODO: How do I verify if it's a mono or stereo here? */ |
| 25 | int val = (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) ? 0 : 1; |
| 26 | if (val == dell_led_value) |
| 27 | return; |
| 28 | dell_led_value = val; |
| 29 | if (dell_led_set_func) |
| 30 | dell_led_set_func(DELL_LED_MICMUTE, dell_led_value); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | |
| 35 | static void alc_fixup_dell_wmi(struct hda_codec *codec, |
| 36 | const struct hda_fixup *fix, int action) |
| 37 | { |
| 38 | struct alc_spec *spec = codec->spec; |
| 39 | bool removefunc = false; |
| 40 | |
| 41 | if (action == HDA_FIXUP_ACT_PROBE) { |
| 42 | if (!dell_led_set_func) |
| 43 | dell_led_set_func = symbol_request(dell_app_wmi_led_set); |
| 44 | if (!dell_led_set_func) { |
| 45 | codec_warn(codec, "Failed to find dell wmi symbol dell_app_wmi_led_set\n"); |
| 46 | return; |
| 47 | } |
| 48 | |
| 49 | removefunc = true; |
| 50 | if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) { |
| 51 | dell_led_value = 0; |
| 52 | if (spec->gen.num_adc_nids > 1) |
| 53 | codec_dbg(codec, "Skipping micmute LED control due to several ADCs"); |
| 54 | else { |
| 55 | dell_old_cap_hook = spec->gen.cap_sync_hook; |
| 56 | spec->gen.cap_sync_hook = update_dell_wmi_micmute_led; |
| 57 | removefunc = false; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | } |
| 62 | |
| 63 | if (dell_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) { |
| 64 | symbol_put(dell_app_wmi_led_set); |
| 65 | dell_led_set_func = NULL; |
| 66 | dell_old_cap_hook = NULL; |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | #else /* CONFIG_LEDS_DELL_NETBOOKS */ |
| 71 | static void alc_fixup_dell_wmi(struct hda_codec *codec, |
| 72 | const struct hda_fixup *fix, int action) |
| 73 | { |
| 74 | } |
| 75 | |
| 76 | #endif /* CONFIG_LEDS_DELL_NETBOOKS */ |