mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
cf67c8e71b
The new vmaster hook, update_tpacpi_mute_led(), calls the original vmaster hook, but I forgot to save the original hook function but keep calling the updated one, which of course results in a stupid endless loop. Fixed now. Signed-off-by: Takashi Iwai <tiwai@suse.de>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* 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->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_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) {
|
|
snd_printk(KERN_WARNING "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)
|
|
snd_printdd("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 */
|