On Thu, 28 Feb 2019 20:34:04 +0100, Manuel Reinhardt wrote: > > Add an entry to the quirks-table to for usb-audio to recognize the > Microbook II (although it only exposes vendor interfaces). A simple boot > quirk is also implemented to set up the sample rate and make sure that > no audio urbs are sent before the device is ready. > > This patch only provides audio playback and capture at 96kHz sample > rate. Notice the following shortcomings: > > - The sample rate is currently hardcoded to 96k although the device also > supports 48k and 44.1k. > > - The various mixer controls of the MicroBook are not made available. > > - The keep-iface control should be on by default because the device > shuts down whenever the altsetting is reset which is usually unwanted. > (I don't know the best way to do this) > > - The communication format used by the MicroBook for sample rate setting > and also other setup has been reverse engineered by looking at the > usbmon output while running the windows driver through virtualbox. In > this patch the first byte of every message is set to \0 while in the > observed communications the first byte acts as a "message-counter" > increasing its value with every message sent. Leaving it at \0 does > not seem to affect the device. > > Signed-off-by: Manuel Reinhardt <manuel.rhdt@xxxxxxxxx> Applied, thanks. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
