LXR linux/sound/pci/hda/dell_wmi

   1// SPDX-License-Identifier: GPL-2.0
   2/* Helper functions for Dell Mic Mute LED control;
   3 * to be included from codec driver
   4 */
   5
   6#if IS_ENABLED(CONFIG_DELL_LAPTOP)
   7#include <linux/dell-led.h>
   8
   9enum {
  10        MICMUTE_LED_ON,
  11        MICMUTE_LED_OFF,
  12        MICMUTE_LED_FOLLOW_CAPTURE,
  13        MICMUTE_LED_FOLLOW_MUTE,
  14};
  15
  16static int dell_led_mode = MICMUTE_LED_FOLLOW_MUTE;
  17static int dell_capture;
  18static int dell_led_value;
  19static int (*dell_micmute_led_set_func)(int);
  20static void (*dell_old_cap_hook)(struct hda_codec *,
  21                                 struct snd_kcontrol *,
  22                                 struct snd_ctl_elem_value *);
  23
  24static void call_micmute_led_update(void)
  25{
  26        int val;
  27
  28        switch (dell_led_mode) {
  29        case MICMUTE_LED_ON:
  30                val = 1;
  31                break;
  32        case MICMUTE_LED_OFF:
  33                val = 0;
  34                break;
  35        case MICMUTE_LED_FOLLOW_CAPTURE:
  36                val = dell_capture;
  37                break;
  38        case MICMUTE_LED_FOLLOW_MUTE:
  39        default:
  40                val = !dell_capture;
  41                break;
  42        }
  43
  44        if (val == dell_led_value)
  45                return;
  46        dell_led_value = val;
  47        dell_micmute_led_set_func(dell_led_value);
  48}
  49
  50static void update_dell_wmi_micmute_led(struct hda_codec *codec,
  51                                        struct snd_kcontrol *kcontrol,
  52                                        struct snd_ctl_elem_value *ucontrol)
  53{
  54        if (dell_old_cap_hook)
  55                dell_old_cap_hook(codec, kcontrol, ucontrol);
  56
  57        if (!ucontrol || !dell_micmute_led_set_func)
  58                return;
  59        if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
  60                /* TODO: How do I verify if it's a mono or stereo here? */
  61                dell_capture = (ucontrol->value.integer.value[0] ||
  62                                ucontrol->value.integer.value[1]);
  63                call_micmute_led_update();
  64        }
  65}
  66
  67static int dell_mic_mute_led_mode_info(struct snd_kcontrol *kcontrol,
  68                                       struct snd_ctl_elem_info *uinfo)
  69{
  70        static const char * const texts[] = {
  71                "On", "Off", "Follow Capture", "Follow Mute",
  72        };
  73
  74        return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
  75}
  76
  77static int dell_mic_mute_led_mode_get(struct snd_kcontrol *kcontrol,
  78                                      struct snd_ctl_elem_value *ucontrol)
  79{
  80        ucontrol->value.enumerated.item[0] = dell_led_mode;
  81        return 0;
  82}
  83
  84static int dell_mic_mute_led_mode_put(struct snd_kcontrol *kcontrol,
  85                                      struct snd_ctl_elem_value *ucontrol)
  86{
  87        unsigned int mode;
  88
  89        mode = ucontrol->value.enumerated.item[0];
  90        if (mode > MICMUTE_LED_FOLLOW_MUTE)
  91                mode = MICMUTE_LED_FOLLOW_MUTE;
  92        if (mode == dell_led_mode)
  93                return 0;
  94        dell_led_mode = mode;
  95        call_micmute_led_update();
  96        return 1;
  97}
  98
  99static const struct snd_kcontrol_new dell_mic_mute_mode_ctls[] = {
 100        {
 101                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 102                .name = "Mic Mute-LED Mode",
 103                .info = dell_mic_mute_led_mode_info,
 104                .get = dell_mic_mute_led_mode_get,
 105                .put = dell_mic_mute_led_mode_put,
 106        },
 107        {}
 108};
 109
 110static void alc_fixup_dell_wmi(struct hda_codec *codec,
 111                               const struct hda_fixup *fix, int action)
 112{
 113        struct alc_spec *spec = codec->spec;
 114        bool removefunc = false;
 115
 116        if (action == HDA_FIXUP_ACT_PROBE) {
 117                if (!dell_micmute_led_set_func)
 118                        dell_micmute_led_set_func = symbol_request(dell_micmute_led_set);
 119                if (!dell_micmute_led_set_func) {
 120                        codec_warn(codec, "Failed to find dell wmi symbol dell_micmute_led_set\n");
 121                        return;
 122                }
 123
 124                removefunc = true;
 125                if (dell_micmute_led_set_func(false) >= 0) {
 126                        dell_led_value = 0;
 127                        if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
 128                                codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
 129                        else {
 130                                dell_old_cap_hook = spec->gen.cap_sync_hook;
 131                                spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
 132                                removefunc = false;
 133                                add_mixer(spec, dell_mic_mute_mode_ctls);
 134                        }
 135                }
 136
 137        }
 138
 139        if (dell_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
 140                symbol_put(dell_micmute_led_set);
 141                dell_micmute_led_set_func = NULL;
 142                dell_old_cap_hook = NULL;
 143        }
 144}
 145
 146#else /* CONFIG_DELL_LAPTOP */
 147static void alc_fixup_dell_wmi(struct hda_codec *codec,
 148                               const struct hda_fixup *fix, int action)
 149{
 150}
 151
 152#endif /* CONFIG_DELL_LAPTOP */
 153