ALSA: hda: generic: Drop the old mic-mute LED hook

Now all users of the old snd_hda_gen_add_micmute_led() have been
converted to the new LED-classdev variant, and we can make it local,
and remove the unused hda_gen_spec.micmute_led.update callback field.

Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200618110842.27238-8-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -3922,8 +3922,6 @@ static void call_micmute_led_update(struct hda_codec *codec)
 	if (val == spec->micmute_led.led_value)
 		return;
 	spec->micmute_led.led_value = val;
-	if (spec->micmute_led.update)
-		spec->micmute_led.update(codec);
 	ledtrig_audio_set(LED_AUDIO_MICMUTE,
 			  spec->micmute_led.led_value ? LED_ON : LED_OFF);
 }
@@ -3997,20 +3995,8 @@ static const struct snd_kcontrol_new micmute_led_mode_ctl = {
 	.put = micmute_led_mode_put,
 };
 
-/**
- * snd_hda_gen_add_micmute_led - helper for setting up mic mute LED hook
- * @codec: the HDA codec
- * @hook: the callback for updating LED
- *
- * Called from the codec drivers for offering the mic mute LED controls.
- * When established, it sets up cap_sync_hook and triggers the callback at
- * each time when the capture mixer switch changes.  The callback is supposed
- * to update the LED accordingly.
- *
- * Returns 0 if the hook is established or a negative error code.
- */
-int snd_hda_gen_add_micmute_led(struct hda_codec *codec,
-				void (*hook)(struct hda_codec *))
+/* Set up the capture sync hook for controlling the mic-mute LED */
+static int add_micmute_led_hook(struct hda_codec *codec)
 {
 	struct hda_gen_spec *spec = codec->spec;
 
@@ -4018,13 +4004,11 @@ int snd_hda_gen_add_micmute_led(struct hda_codec *codec,
 	spec->micmute_led.capture = 0;
 	spec->micmute_led.led_value = 0;
 	spec->micmute_led.old_hook = spec->cap_sync_hook;
-	spec->micmute_led.update = hook;
 	spec->cap_sync_hook = update_micmute_led;
 	if (!snd_hda_gen_add_kctl(spec, NULL, &micmute_led_mode_ctl))
 		return -ENOMEM;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(snd_hda_gen_add_micmute_led);
 
 /**
  * snd_dha_gen_add_micmute_led_cdev - Create a LED classdev and enable as mic-mute LED
@@ -4065,7 +4049,7 @@ int snd_hda_gen_add_micmute_led_cdev(struct hda_codec *codec,
 		}
 	}
 
-	return snd_hda_gen_add_micmute_led(codec, NULL);
+	return add_micmute_led_hook(codec);
 }
 EXPORT_SYMBOL_GPL(snd_hda_gen_add_micmute_led_cdev);
 #endif /* CONFIG_SND_HDA_GENERIC_LEDS */

sound/pci/hda/hda_generic.h

@@ -88,7 +88,6 @@ struct hda_micmute_hook {
 	unsigned int led_mode;
 	unsigned int capture;
 	unsigned int led_value;
-	void (*update)(struct hda_codec *codec);
 	void (*old_hook)(struct hda_codec *codec,
 			 struct snd_kcontrol *kcontrol,
 			 struct snd_ctl_elem_value *ucontrol);
@@ -355,8 +354,6 @@ unsigned int snd_hda_gen_path_power_filter(struct hda_codec *codec,
 void snd_hda_gen_stream_pm(struct hda_codec *codec, hda_nid_t nid, bool on);
 int snd_hda_gen_fix_pin_power(struct hda_codec *codec, hda_nid_t pin);
 
-int snd_hda_gen_add_micmute_led(struct hda_codec *codec,
-				void (*hook)(struct hda_codec *));
 int snd_hda_gen_add_micmute_led_cdev(struct hda_codec *codec,
 				     int (*callback)(struct led_classdev *,
 						     enum led_brightness));