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
9 static int (*dell_micmute_led_set_func)(int);
10
dell_micmute_update(struct hda_codec * codec)11 static void dell_micmute_update(struct hda_codec *codec)
12 {
13 struct hda_gen_spec *spec = codec->spec;
14
15 dell_micmute_led_set_func(spec->micmute_led.led_value);
16 }
17
alc_fixup_dell_wmi(struct hda_codec * codec,const struct hda_fixup * fix,int action)18 static void alc_fixup_dell_wmi(struct hda_codec *codec,
19 const struct hda_fixup *fix, int action)
20 {
21 bool removefunc = false;
22
23 if (action == HDA_FIXUP_ACT_PROBE) {
24 if (!dell_micmute_led_set_func)
25 dell_micmute_led_set_func = symbol_request(dell_micmute_led_set);
26 if (!dell_micmute_led_set_func) {
27 codec_warn(codec, "Failed to find dell wmi symbol dell_micmute_led_set\n");
28 return;
29 }
30
31 removefunc = (dell_micmute_led_set_func(false) < 0) ||
32 (snd_hda_gen_add_micmute_led(codec,
33 dell_micmute_update) < 0);
34 }
35
36 if (dell_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
37 symbol_put(dell_micmute_led_set);
38 dell_micmute_led_set_func = NULL;
39 }
40 }
41
42 #else /* CONFIG_DELL_LAPTOP */
alc_fixup_dell_wmi(struct hda_codec * codec,const struct hda_fixup * fix,int action)43 static void alc_fixup_dell_wmi(struct hda_codec *codec,
44 const struct hda_fixup *fix, int action)
45 {
46 }
47
48 #endif /* CONFIG_DELL_LAPTOP */
49
