![Hui Wang](/assets/img/avatar_default.png)
On a Dell laptop, there is no global adcs for all input devices, so
the input devices use the different adc, as a result, dyn_adc_switch
is set to true.
In this situation, it is safe to control the micmute led according to
user's choice of muting/unmuting the current input device, since only
current input device path is active, while other input device paths
are inactive and powered down.
Fixes: 00ef99408b
('ALSA: hda - add mic mute led hook for dell machines')
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* Helper functions for Dell Mic Mute LED control;
|
|
* to be included from codec driver
|
|
*/
|
|
|
|
#if IS_ENABLED(CONFIG_LEDS_DELL_NETBOOKS)
|
|
#include <linux/dell-led.h>
|
|
|
|
static int dell_led_value;
|
|
static int (*dell_led_set_func)(int, int);
|
|
static void (*dell_old_cap_hook)(struct hda_codec *,
|
|
struct snd_kcontrol *,
|
|
struct snd_ctl_elem_value *);
|
|
|
|
static void update_dell_wmi_micmute_led(struct hda_codec *codec,
|
|
struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
if (dell_old_cap_hook)
|
|
dell_old_cap_hook(codec, kcontrol, ucontrol);
|
|
|
|
if (!ucontrol || !dell_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? */
|
|
int val = (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) ? 0 : 1;
|
|
if (val == dell_led_value)
|
|
return;
|
|
dell_led_value = val;
|
|
if (dell_led_set_func)
|
|
dell_led_set_func(DELL_LED_MICMUTE, dell_led_value);
|
|
}
|
|
}
|
|
|
|
|
|
static void alc_fixup_dell_wmi(struct hda_codec *codec,
|
|
const struct hda_fixup *fix, int action)
|
|
{
|
|
struct alc_spec *spec = codec->spec;
|
|
bool removefunc = false;
|
|
|
|
if (action == HDA_FIXUP_ACT_PROBE) {
|
|
if (!dell_led_set_func)
|
|
dell_led_set_func = symbol_request(dell_app_wmi_led_set);
|
|
if (!dell_led_set_func) {
|
|
codec_warn(codec, "Failed to find dell wmi symbol dell_app_wmi_led_set\n");
|
|
return;
|
|
}
|
|
|
|
removefunc = true;
|
|
if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) {
|
|
dell_led_value = 0;
|
|
if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
|
|
codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
|
|
else {
|
|
dell_old_cap_hook = spec->gen.cap_sync_hook;
|
|
spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
|
|
removefunc = false;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
if (dell_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
|
|
symbol_put(dell_app_wmi_led_set);
|
|
dell_led_set_func = NULL;
|
|
dell_old_cap_hook = NULL;
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_LEDS_DELL_NETBOOKS */
|
|
static void alc_fixup_dell_wmi(struct hda_codec *codec,
|
|
const struct hda_fixup *fix, int action)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_LEDS_DELL_NETBOOKS */
|