1 /* Helper functions for Thinkpad LED control;
2 * to be included from codec driver
5 #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
7 #include <linux/acpi.h>
8 #include <linux/thinkpad_acpi.h>
10 static int (*led_set_func
)(int, bool);
11 static void (*old_vmaster_hook
)(void *, int);
13 static bool is_thinkpad(struct hda_codec
*codec
)
15 return (codec
->core
.subsystem_id
>> 16 == 0x17aa) &&
16 (acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") ||
17 acpi_dev_found("IBM0068"));
20 static void update_tpacpi_mute_led(void *private_data
, int enabled
)
23 old_vmaster_hook(private_data
, enabled
);
26 led_set_func(TPACPI_LED_MUTE
, !enabled
);
29 static void update_tpacpi_micmute_led(struct hda_codec
*codec
,
30 struct snd_kcontrol
*kcontrol
,
31 struct snd_ctl_elem_value
*ucontrol
)
33 if (!ucontrol
|| !led_set_func
)
35 if (strcmp("Capture Switch", ucontrol
->id
.name
) == 0 && ucontrol
->id
.index
== 0) {
36 /* TODO: How do I verify if it's a mono or stereo here? */
37 bool val
= ucontrol
->value
.integer
.value
[0] || ucontrol
->value
.integer
.value
[1];
38 led_set_func(TPACPI_LED_MICMUTE
, !val
);
42 static void hda_fixup_thinkpad_acpi(struct hda_codec
*codec
,
43 const struct hda_fixup
*fix
, int action
)
45 struct hda_gen_spec
*spec
= codec
->spec
;
46 bool removefunc
= false;
48 if (action
== HDA_FIXUP_ACT_PROBE
) {
49 if (!is_thinkpad(codec
))
52 led_set_func
= symbol_request(tpacpi_led_set
);
55 "Failed to find thinkpad-acpi symbol tpacpi_led_set\n");
60 if (led_set_func(TPACPI_LED_MUTE
, false) >= 0) {
61 old_vmaster_hook
= spec
->vmaster_mute
.hook
;
62 spec
->vmaster_mute
.hook
= update_tpacpi_mute_led
;
65 if (led_set_func(TPACPI_LED_MICMUTE
, false) >= 0) {
66 if (spec
->num_adc_nids
> 1 && !spec
->dyn_adc_switch
)
68 "Skipping micmute LED control due to several ADCs");
70 spec
->cap_sync_hook
= update_tpacpi_micmute_led
;
76 if (led_set_func
&& (action
== HDA_FIXUP_ACT_FREE
|| removefunc
)) {
77 symbol_put(tpacpi_led_set
);
79 old_vmaster_hook
= NULL
;
83 #else /* CONFIG_THINKPAD_ACPI */
85 static void hda_fixup_thinkpad_acpi(struct hda_codec
*codec
,
86 const struct hda_fixup
*fix
, int action
)
90 #endif /* CONFIG_THINKPAD_ACPI */