When converting from dB value to raw value, the control's
full range was not checked in case of SND_CTL_TLVT_DB_RANGE.
Check out of range dB values, and return apropriate raw
value for the caller.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The DB_RANGE need to be used on some HW, since the gain on
volume control is not continuous, and has to be divided into
several sub DB_SCALE ranges.
ASoC has a feature to override the HW default volume range,
and in this case when the volume range is less than the
HW maximum we do not need to go through the whole DB_RANGE,
but we need to stop where the kcontrol's maximum tell us.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Export helper functions to convert dB level and range.
snd_tlv_*dB*() are to convert dB level or range directly from TLV data.
snd_ctl_*dB*() are to get dB level or range from a control element.
