[PATCH] ASoC: SOF: Update correct LED status at the first time usage of update_mute_led()

[Kai-Heng Feng]

At the first time update_mute_led() gets called, if channels are already
muted, the temp value equals to led_value as 0, skipping the following
LED setting.

So set led_value to -1 as an uninitialized state, to update the correct
LED status at first time usage.

Fixes: 5d43001ae436 ("ASoC: SOF: acpi led support for switch controls")
Signed-off-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
---
 sound/soc/sof/control.c   | 4 ++--
 sound/soc/sof/sof-audio.h | 2 +-
 sound/soc/sof/topology.c  | 2 ++
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/control.c b/sound/soc/sof/control.c
index dfc412e2d956..6d63768d42aa 100644
--- a/sound/soc/sof/control.c
+++ b/sound/soc/sof/control.c
@@ -19,8 +19,8 @@ static void update_mute_led(struct snd_sof_control *scontrol,
                            struct snd_kcontrol *kcontrol,
                            struct snd_ctl_elem_value *ucontrol)
 {
-       unsigned int temp = 0;
-       unsigned int mask;
+       int temp = 0;
+       int mask;
        int i;
 
        mask = 1U << snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
diff --git a/sound/soc/sof/sof-audio.h b/sound/soc/sof/sof-audio.h
index bf65f31af858..875a5fc13297 100644
--- a/sound/soc/sof/sof-audio.h
+++ b/sound/soc/sof/sof-audio.h
@@ -56,7 +56,7 @@ struct snd_sof_pcm {
 struct snd_sof_led_control {
        unsigned int use_led;
        unsigned int direction;
-       unsigned int led_value;
+       int led_value;
 };
 
 /* ALSA SOF Kcontrol device */
diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index fe8ba3e05e08..ab2b69de1d4d 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -1203,6 +1203,8 @@ static int sof_control_load(struct snd_soc_component 
*scomp, int index,
                return ret;
        }
 
+       scontrol->led_ctl.led_value = -1;
+
        dobj->private = scontrol;
        list_add(&scontrol->list, &sdev->kcontrol_list);
        return ret;
-- 
2.17.1