From: Deepa Madiregama dmadireg@codeaurora.org
- mixer_ctl_set() function is limiting the volume level to particular range. This results in incorrect initial volume setting for that device. - In USB mixer while calculating the dBmin/dBmax values resolution factor is hardcoded to 256 which results in populating the wrong values for dBmin/dBmax. - Fix is to use appropriate resolution factor while calculating the dBmin/dBmax values.
Signed-off-by: Deepa Madiregama dmadireg@codeaurora.org Signed-off-by: Banajit Goswami bgoswami@codeaurora.org Signed-off-by: Meng Wang mwang@codeaurora.org Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- sound/usb/mixer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 5070a6a76ab3..a67448327d07 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1248,8 +1248,10 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, /* USB descriptions contain the dB scale in 1/256 dB unit * while ALSA TLV contains in 1/100 dB unit */ - cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; - cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; + cval->dBmin = + (convert_signed_value(cval, cval->min) * 100) / (cval->res); + cval->dBmax = + (convert_signed_value(cval, cval->max) * 100) / (cval->res); if (cval->dBmin > cval->dBmax) { /* something is wrong; assume it's either from/to 0dB */ if (cval->dBmin < 0)