you have to send email to the author of the patch
i think the usage of the parameter device_setup should be put in
http://git.kernel.org/?p=linux/kernel/git/tiwai/sound.git;a=blob;f=Documentation/sound/alsa/ALSA-Configuration.txt;h=b9cfd339a6fa3d4e89cebb3316e5152f9ff0d252;hb=HEAD
and 0x80 is not documented
you have to send email to the author of the patch
i think the usage of the parameter device_setup should be put in
http:// git.kernel. org/?p= linux/kernel/ git/tiwai/ sound.git; a=blob; f=Documentation /sound/ alsa/ALSA- Configuration. txt;h=b9cfd339a 6fa3d4e89cebb33 16e5152f9ff0d25 2;hb=HEAD
and 0x80 is not documented