Am Donnerstag, 22. November 2012, 21:08:55 schrieb Stefan Hajnoczi: > On Thu, Nov 22, 2012 at 8:58 PM, Greg Kroah-Hartman > > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Nov 22, 2012 at 08:48:39PM +0100, Stefan Hajnoczi wrote: > >> Markus and I have discussed the MIDI processing that currently happens in > >> the line6 driver. This stuff really belongs in userspace where a > >> library or utility can use ALSA MIDI APIs to control the device. Moving > >> MIDI processing to userspace has several benefits: > >> > >> 1. The driver only handles PCM and MIDI I/O. This means less kernel > >> code. > >> > >> 2. A large number of sysfs attributes can be removed. These attributes > >> exposed>> > >> MIDI state and driver code was necessary to sync and manage this > >> state. > >> > >> 3. It's easier for userspace to control the device, try out new MIDI > >> commands,>> > >> etc when the driver acts as a dumb transport. > >> > >> This patch series removes the sysfs attributes and then removes the state > >> behind those attributes. I have tried to make small incremental changes > >> that can be reviewed easily. > > > > Very nice, I'll queue these up on Monday, very good work, thanks so much > > for doing this. > > Thanks! I hope Markus has a chance to review and/or test these > changes first - he knows generally what I'm up too but should have the > final word on details. I just applied all patches and did a quick check with the PODxt Live. The following features are still working: *) the user space code which receives and interprets (at least some) MIDI messages from the device *) ALSA playback *) ALSA volume and monitor controls I will have a look at the Variax and TonePort later. Kind regards, Markus _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
