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Commit | Line | Data |
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b317b032 TI |
1 | /* Helper functions for Thinkpad LED control; |
2 | * to be included from codec driver | |
3 | */ | |
4 | ||
5 | #if IS_ENABLED(CONFIG_THINKPAD_ACPI) | |
6 | ||
7 | #include <linux/acpi.h> | |
8 | #include <linux/thinkpad_acpi.h> | |
9 | ||
10 | static int (*led_set_func)(int, bool); | |
cf67c8e7 | 11 | static void (*old_vmaster_hook)(void *, int); |
b317b032 TI |
12 | |
13 | static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context, | |
14 | void **rv) | |
15 | { | |
16 | bool *found = context; | |
17 | *found = true; | |
18 | return AE_OK; | |
19 | } | |
20 | ||
21 | static bool is_thinkpad(struct hda_codec *codec) | |
22 | { | |
23 | bool found = false; | |
7639a06c | 24 | if (codec->core.subsystem_id >> 16 != 0x17aa) |
b317b032 TI |
25 | return false; |
26 | if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found) | |
27 | return true; | |
28 | found = false; | |
29 | return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found; | |
30 | } | |
31 | ||
32 | static void update_tpacpi_mute_led(void *private_data, int enabled) | |
33 | { | |
cf67c8e7 TI |
34 | if (old_vmaster_hook) |
35 | old_vmaster_hook(private_data, enabled); | |
b317b032 TI |
36 | |
37 | if (led_set_func) | |
38 | led_set_func(TPACPI_LED_MUTE, !enabled); | |
39 | } | |
40 | ||
41 | static void update_tpacpi_micmute_led(struct hda_codec *codec, | |
7fe30711 | 42 | struct snd_kcontrol *kcontrol, |
b317b032 TI |
43 | struct snd_ctl_elem_value *ucontrol) |
44 | { | |
45 | if (!ucontrol || !led_set_func) | |
46 | return; | |
47 | if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) { | |
48 | /* TODO: How do I verify if it's a mono or stereo here? */ | |
49 | bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]; | |
50 | led_set_func(TPACPI_LED_MICMUTE, !val); | |
51 | } | |
52 | } | |
53 | ||
54 | static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, | |
55 | const struct hda_fixup *fix, int action) | |
56 | { | |
57 | struct hda_gen_spec *spec = codec->spec; | |
58 | bool removefunc = false; | |
59 | ||
60 | if (action == HDA_FIXUP_ACT_PROBE) { | |
61 | if (!is_thinkpad(codec)) | |
62 | return; | |
63 | if (!led_set_func) | |
64 | led_set_func = symbol_request(tpacpi_led_set); | |
65 | if (!led_set_func) { | |
4e76a883 TI |
66 | codec_warn(codec, |
67 | "Failed to find thinkpad-acpi symbol tpacpi_led_set\n"); | |
b317b032 TI |
68 | return; |
69 | } | |
70 | ||
71 | removefunc = true; | |
72 | if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { | |
cf67c8e7 | 73 | old_vmaster_hook = spec->vmaster_mute.hook; |
b317b032 | 74 | spec->vmaster_mute.hook = update_tpacpi_mute_led; |
7290006d | 75 | spec->vmaster_mute_enum = 1; |
b317b032 TI |
76 | removefunc = false; |
77 | } | |
78 | if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { | |
79 | if (spec->num_adc_nids > 1) | |
4e76a883 TI |
80 | codec_dbg(codec, |
81 | "Skipping micmute LED control due to several ADCs"); | |
b317b032 TI |
82 | else { |
83 | spec->cap_sync_hook = update_tpacpi_micmute_led; | |
84 | removefunc = false; | |
85 | } | |
86 | } | |
87 | } | |
88 | ||
89 | if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) { | |
90 | symbol_put(tpacpi_led_set); | |
91 | led_set_func = NULL; | |
cf67c8e7 | 92 | old_vmaster_hook = NULL; |
b317b032 TI |
93 | } |
94 | } | |
95 | ||
96 | #else /* CONFIG_THINKPAD_ACPI */ | |
97 | ||
98 | static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, | |
99 | const struct hda_fixup *fix, int action) | |
100 | { | |
101 | } | |
102 | ||
103 | #endif /* CONFIG_THINKPAD_ACPI */ |