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