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ALSA: hda: generic: Add vmaster mute LED helper

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Like mic-mute LED handling, add a new helper to deal with the master
mute LED with LED classdev.  Unlike the mic-mute case, the playback
master mute is hooked on vmaster, and we suppose no nested hooks
allowed there.

The classdev creation code is factored out to a common function that
is called from both mute and mic-mute LED helpers.

Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200618110842.27238-9-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2020-06-18 13:08:37 +02:00
parent fe1a162191
commit 15509b6344
2 changed files with 62 additions and 12 deletions
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71
sound/pci/hda/hda_generic.c
View File

@ -3888,6 +3888,64 @@ static int parse_mic_boost(struct hda_codec *codec)
}
#ifdef CONFIG_SND_HDA_GENERIC_LEDS
/*
* vmaster mute LED hook helpers
*/
static int create_mute_led_cdev(struct hda_codec *codec,
int (*callback)(struct led_classdev *,
enum led_brightness),
bool micmute)
{
struct led_classdev *cdev;
cdev = devm_kzalloc(&codec->core.dev, sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;
cdev->name = micmute ? "hda::micmute" : "hda::mute";
cdev->max_brightness = 1;
cdev->default_trigger = micmute ? "audio-micmute" : "audio-mute";
cdev->brightness_set_blocking = callback;
cdev->brightness = ledtrig_audio_get(micmute ? LED_AUDIO_MICMUTE : LED_AUDIO_MUTE);
return devm_led_classdev_register(&codec->core.dev, cdev);
}
static void vmaster_update_mute_led(void *private_data, int enabled)
{
ledtrig_audio_set(LED_AUDIO_MUTE, enabled ? LED_OFF : LED_ON);
}
/**
* snd_dha_gen_add_mute_led_cdev - Create a LED classdev and enable as vmaster mute LED
* @codec: the HDA codec
* @callback: the callback for LED classdev brightness_set_blocking
*/
int snd_hda_gen_add_mute_led_cdev(struct hda_codec *codec,
int (*callback)(struct led_classdev *,
enum led_brightness))
{
struct hda_gen_spec *spec = codec->spec;
int err;
if (callback) {
err = create_mute_led_cdev(codec, callback, false);
if (err) {
codec_warn(codec, "failed to create a mute LED cdev\n");
return err;
}
}
if (spec->vmaster_mute.hook)
codec_err(codec, "vmaster hook already present before cdev!\n");
spec->vmaster_mute.hook = vmaster_update_mute_led;
spec->vmaster_mute_enum = 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_gen_add_mute_led_cdev);
/*
* mic mute LED hook helpers
*/
@ -4029,20 +4087,9 @@ int snd_hda_gen_add_micmute_led_cdev(struct hda_codec *codec,
enum led_brightness))
{
int err;
struct led_classdev *cdev;
if (callback) {
cdev = devm_kzalloc(&codec->core.dev, sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;
cdev->name = "hda::micmute";
cdev->max_brightness = 1;
cdev->default_trigger = "audio-micmute";
cdev->brightness_set_blocking = callback;
cdev->brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
err = devm_led_classdev_register(&codec->core.dev, cdev);
err = create_mute_led_cdev(codec, callback, true);
if (err) {
codec_warn(codec, "failed to create a mic-mute LED cdev\n");
return err;

3
sound/pci/hda/hda_generic.h
View File

@ -354,6 +354,9 @@ unsigned int snd_hda_gen_path_power_filter(struct hda_codec *codec,
void snd_hda_gen_stream_pm(struct hda_codec *codec, hda_nid_t nid, bool on);
int snd_hda_gen_fix_pin_power(struct hda_codec *codec, hda_nid_t pin);
int snd_hda_gen_add_mute_led_cdev(struct hda_codec *codec,
int (*callback)(struct led_classdev *,
enum led_brightness));
int snd_hda_gen_add_micmute_led_cdev(struct hda_codec *codec,
int (*callback)(struct led_classdev *,
enum led_brightness));