Hi Ruslan, please excuse my stupid error, I really apologize... Dne 09. 11. 20 v 9:24 Pavel Hofman napsal(a): > Hi Bilovol, > > Dne 08. 11. 20 v 1:18 Ruslan Bilovol napsal(a): >> This adds interface between userspace and feedback >> endpoint to report real feedback frequency to the Host. >> >> Current implementation adds new userspace interface >> ALSA mixer control "PCM Feedback Frequency Hz" (similar >> to aloop driver's "PCM Rate Shift 100000" mixer control) >> >> We allow +/-20% deviation of nominal sampling frequency, >> that usually is more than enough in real-world usecases >> >> Usage of this new control is easy to implement in >> existing userspace tools like alsaloop from alsa-utils. >> >> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx> >> --- >> drivers/usb/gadget/function/f_uac2.c | 4 ++ >> drivers/usb/gadget/function/u_audio.c | 93 +++++++++++++++++++++++++++++++++++ >> drivers/usb/gadget/function/u_audio.h | 7 +++ >> 3 files changed, 104 insertions(+) > > Thanks a lot for the great implementation. IIUC the control element sets > integer frequency in Hz. Often the clocks deviate by small fractions of > Hz. Please have you considered the value to be e.g. in 100th of Hz for > finer control of the samplerate? Similar to the PCM Rate Shift which has > a step 100000th of the samplerate. > > Thanks a lot. > > Best regards, > > Pavel. >
