LXR linux/sound/pci/hda/dell_wmi

   1/* Helper functions for Dell Mic Mute LED control;
   2 * to be included from codec driver
   3 */
   4
   5#if IS_ENABLED(CONFIG_DELL_LAPTOP)
   6#include <linux/dell-led.h>
   7
   8enum {
   9        MICMUTE_LED_ON,
  10        MICMUTE_LED_OFF,
  11        MICMUTE_LED_FOLLOW_CAPTURE,
  12        MICMUTE_LED_FOLLOW_MUTE,
  13};
  14
  15static int dell_led_mode = MICMUTE_LED_FOLLOW_MUTE;
  16static int dell_capture;
  17static int dell_led_value;
  18static int (*dell_micmute_led_set_func)(int);
  19static void (*dell_old_cap_hook)(struct hda_codec *,
  20                                 struct snd_kcontrol *,
  21                                 struct snd_ctl_elem_value *);
  22
  23static void call_micmute_led_update(void)
  24{
  25        int val;
  26
  27        switch (dell_led_mode) {
  28        case MICMUTE_LED_ON:
  29                val = 1;
  30                break;
  31        case MICMUTE_LED_OFF:
  32                val = 0;
  33                break;
  34        case MICMUTE_LED_FOLLOW_CAPTURE:
  35                val = dell_capture;
  36                break;
  37        case MICMUTE_LED_FOLLOW_MUTE:
  38        default:
  39                val = !dell_capture;
  40                break;
  41        }
  42
  43        if (val == dell_led_value)
  44                return;
  45        dell_led_value = val;
  46        dell_micmute_led_set_func(dell_led_value);
  47}
  48
  49static void update_dell_wmi_micmute_led(struct hda_codec *codec,
  50                                        struct snd_kcontrol *kcontrol,
  51                                        struct snd_ctl_elem_value *ucontrol)
  52{
  53        if (dell_old_cap_hook)
  54                dell_old_cap_hook(codec, kcontrol, ucontrol);
  55
  56        if (!ucontrol || !dell_micmute_led_set_func)
  57                return;
  58        if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
  59                /* TODO: How do I verify if it's a mono or stereo here? */
  60                dell_capture = (ucontrol->value.integer.value[0] ||
  61                                ucontrol->value.integer.value[1]);
  62                call_micmute_led_update();
  63        }
  64}
  65
  66static int dell_mic_mute_led_mode_info(struct snd_kcontrol *kcontrol,
  67                                       struct snd_ctl_elem_info *uinfo)
  68{
  69        static const char * const texts[] = {
  70                "On", "Off", "Follow Capture", "Follow Mute",
  71        };
  72
  73        return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
  74}
  75
  76static int dell_mic_mute_led_mode_get(struct snd_kcontrol *kcontrol,
  77                                      struct snd_ctl_elem_value *ucontrol)
  78{
  79        ucontrol->value.enumerated.item[0] = dell_led_mode;
  80        return 0;
  81}
  82
  83static int dell_mic_mute_led_mode_put(struct snd_kcontrol *kcontrol,
  84                                      struct snd_ctl_elem_value *ucontrol)
  85{
  86        unsigned int mode;
  87
  88        mode = ucontrol->value.enumerated.item[0];
  89        if (mode > MICMUTE_LED_FOLLOW_MUTE)
  90                mode = MICMUTE_LED_FOLLOW_MUTE;
  91        if (mode == dell_led_mode)
  92                return 0;
  93        dell_led_mode = mode;
  94        call_micmute_led_update();
  95        return 1;
  96}
  97
  98static const struct snd_kcontrol_new dell_mic_mute_mode_ctls[] = {
  99        {
 100                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 101                .name = "Mic Mute-LED Mode",
 102                .info = dell_mic_mute_led_mode_info,
 103                .get = dell_mic_mute_led_mode_get,
 104                .put = dell_mic_mute_led_mode_put,
 105        },
 106        {}
 107};
 108
 109static void alc_fixup_dell_wmi(struct hda_codec *codec,
 110                               const struct hda_fixup *fix, int action)
 111{
 112        struct alc_spec *spec = codec->spec;
 113        bool removefunc = false;
 114
 115        if (action == HDA_FIXUP_ACT_PROBE) {
 116                if (!dell_micmute_led_set_func)
 117                        dell_micmute_led_set_func = symbol_request(dell_micmute_led_set);
 118                if (!dell_micmute_led_set_func) {
 119                        codec_warn(codec, "Failed to find dell wmi symbol dell_micmute_led_set\n");
 120                        return;
 121                }
 122
 123                removefunc = true;
 124                if (dell_micmute_led_set_func(false) >= 0) {
 125                        dell_led_value = 0;
 126                        if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
 127                                codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
 128                        else {
 129                                dell_old_cap_hook = spec->gen.cap_sync_hook;
 130                                spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
 131                                removefunc = false;
 132                                add_mixer(spec, dell_mic_mute_mode_ctls);
 133                        }
 134                }
 135
 136        }
 137
 138        if (dell_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
 139                symbol_put(dell_micmute_led_set);
 140                dell_micmute_led_set_func = NULL;
 141                dell_old_cap_hook = NULL;
 142        }
 143}
 144
 145#else /* CONFIG_DELL_LAPTOP */
 146static void alc_fixup_dell_wmi(struct hda_codec *codec,
 147                               const struct hda_fixup *fix, int action)
 148{
 149}
 150
 151#endif /* CONFIG_DELL_LAPTOP */
 152