123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102 |
- /* Helper functions for Thinkpad LED control;
- * to be included from codec driver
- */
- #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
- #include <linux/acpi.h>
- #include <linux/thinkpad_acpi.h>
- static int (*led_set_func)(int, bool);
- static void (*old_vmaster_hook)(void *, int);
- static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
- void **rv)
- {
- bool *found = context;
- *found = true;
- return AE_OK;
- }
- static bool is_thinkpad(struct hda_codec *codec)
- {
- bool found = false;
- if (codec->core.subsystem_id >> 16 != 0x17aa)
- return false;
- if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
- return true;
- found = false;
- return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found;
- }
- static void update_tpacpi_mute_led(void *private_data, int enabled)
- {
- if (old_vmaster_hook)
- old_vmaster_hook(private_data, enabled);
- if (led_set_func)
- led_set_func(TPACPI_LED_MUTE, !enabled);
- }
- static void update_tpacpi_micmute_led(struct hda_codec *codec,
- struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
- {
- if (!ucontrol || !led_set_func)
- return;
- if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
- /* TODO: How do I verify if it's a mono or stereo here? */
- bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1];
- led_set_func(TPACPI_LED_MICMUTE, !val);
- }
- }
- static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
- const struct hda_fixup *fix, int action)
- {
- struct hda_gen_spec *spec = codec->spec;
- bool removefunc = false;
- if (action == HDA_FIXUP_ACT_PROBE) {
- if (!is_thinkpad(codec))
- return;
- if (!led_set_func)
- led_set_func = symbol_request(tpacpi_led_set);
- if (!led_set_func) {
- codec_warn(codec,
- "Failed to find thinkpad-acpi symbol tpacpi_led_set\n");
- return;
- }
- removefunc = true;
- if (led_set_func(TPACPI_LED_MUTE, false) >= 0) {
- old_vmaster_hook = spec->vmaster_mute.hook;
- spec->vmaster_mute.hook = update_tpacpi_mute_led;
- removefunc = false;
- }
- if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) {
- if (spec->num_adc_nids > 1 && !spec->dyn_adc_switch)
- codec_dbg(codec,
- "Skipping micmute LED control due to several ADCs");
- else {
- spec->cap_sync_hook = update_tpacpi_micmute_led;
- removefunc = false;
- }
- }
- }
- if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
- symbol_put(tpacpi_led_set);
- led_set_func = NULL;
- old_vmaster_hook = NULL;
- }
- }
- #else /* CONFIG_THINKPAD_ACPI */
- static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
- const struct hda_fixup *fix, int action)
- {
- }
- #endif /* CONFIG_THINKPAD_ACPI */
|