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-rw-r--r--sound/usb/usbaudio.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 158ec053dc44..1ef4d39978df 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -196,6 +196,9 @@ extern bool snd_usb_skip_validation;
* for the given endpoint.
* QUIRK_FLAG_MIC_RES_16 and QUIRK_FLAG_MIC_RES_384
* Set the fixed resolution for Mic Capture Volume (mostly for webcams)
+ * QUIRK_FLAG_MIXER_MIN_MUTE
+ * Set minimum volume control value as mute for devices where the lowest
+ * playback value represents muted state instead of minimum audible volume
*/
#define QUIRK_FLAG_GET_SAMPLE_RATE (1U << 0)
@@ -222,5 +225,6 @@ extern bool snd_usb_skip_validation;
#define QUIRK_FLAG_FIXED_RATE (1U << 21)
#define QUIRK_FLAG_MIC_RES_16 (1U << 22)
#define QUIRK_FLAG_MIC_RES_384 (1U << 23)
+#define QUIRK_FLAG_MIXER_MIN_MUTE (1U << 24)
#endif /* __USBAUDIO_H */