Some devices do mute the volume at the minimal volume, and for such
devices, we need to set SNDRV_CTL_TLVT_DB_MINMAX_MUTE to the TLV
information. It corresponds to setting usb_mixer_elem_info.min_mute
flag in the USB-audio driver.
This patch adds a new field min_mute in usbmix_dB_map so that the
mixer map entry can pass the flag.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/usb/mixer.c | 1 +
sound/usb/mixer_maps.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6e7bac8203ba..5b9fd07ce2a2 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -145,6 +145,7 @@ static inline void check_mapped_dB(const struct usbmix_name_map *p,
if (p && p->dB) {
cval->dBmin = p->dB->min;
cval->dBmax = p->dB->max;
+ cval->min_mute = p->dB->min_mute;
cval->initialized = 1;
}
}
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 92c06b1bb979..9d71c569b148 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -8,6 +8,7 @@
struct usbmix_dB_map {
int min;
int max;
+ bool min_mute;
};
struct usbmix_name_map {
--
2.26.2
