ALSA: hdspm - Allow DDS/Varispeed to be set from userspace
authorAdrian Knoth <adi@drcomp.erfurt.thur.de>
Fri, 19 Oct 2012 15:42:22 +0000 (17:42 +0200)
committerTakashi Iwai <tiwai@suse.de>
Sat, 20 Oct 2012 08:39:45 +0000 (10:39 +0200)
commit41285a98f8f052b59f01bbbcb0064e5e41b0ca2d
tree11fbf5848c0b9de60e0b79b29d4fe089e5c5043c
parent84f98fdf7865fbd35b312eb39ea91e5618c514c7
ALSA: hdspm - Allow DDS/Varispeed to be set from userspace

The DDS value is the actual physical sample rate. We set it indirectly
when selecting 44100, 48000 and so on via snd_hdspm_hw_params or
hdspm_set_clock_source.

This commit now allows the DDS value to be altered at runtime, thus
speeding up or slowing down the physical sample rate. This is required
for MADI's varispeed that allows for ±12.5% speed adjustment from the
"selected" rate (32kHz, 44100kHz, 48kHz and so on).

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/rme9652/hdspm.c