On Fri, 23 Sep 2016 05:43:47 +0200,
Anssi Hannula wrote:
>
> The DragonFly quirk added in 42e3121d90f4 ("ALSA: usb-audio: Add a more
> accurate volume quirk for AudioQuest DragonFly") applies a custom dB map
> on the volume control when its range is reported as 0..50 (0 .. 0.2dB).
>
> However, there exists at least one other variant (hw v1.0c, as opposed
> to the tested v1.2) which reports a different non-sensical volume range
> (0..53) and the custom map is therefore not applied for that device.
>
> This results in all of the volume change appearing close to 100% on
> mixer UIs that utilize the dB TLV information.
>
> Add a fallback case where no dB TLV is reported at all if the control
> range is not 0..50 but still 0..N where N <= 1000 (3.9 dB). Also
> restrict the quirk to only apply to the volume control as there is also
> a mute control which would match the check otherwise.
>
> Signed-off-by: Anssi Hannula <anssi.hannula@xxxxxx>
> Reported-by: David W <regulars@xxxxxxxxxxxx>
> Tested-by: David W <regulars@xxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
Thanks, I applied with Fixes tag.
Takashi
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