It was part of this discussion in which you participated. https://groups.google.com/forum/#!msg/beagleboard/TMGEWjBLsok/ALk4h_jrCwAJ
Regards, John > On Apr 19, 2016, at 2:41 AM, Rick Mann <rm...@latencyzero.com> wrote: > > The following .dtsi file: > > > https://github.com/RobertCNelson/dtb-rebuilder/blob/4.4.x/src/arm/am33xx-overlay-edma-fix.dtsi > > causes the mcasp davinci audio driver to load during boot, > and prevents overlays (like BB-BONE-AUDI-02) from setting > audio parameters. The result is hardware configuration errors > when trying to use ALSA commands: > >> Unable to set hw params for playback: Invalid argument >> Setting of hwparams failed: Invalid argument > > That .dtsi file enables spi0/1, and mcasp0/1. By removing > the mcasp0/1 entries, the BB-BONE-AUDI-02 overlay is able > to enable mcasp while configuring it properly, and allowing > the driver to work. > > It's not clear to me how that file is an eDMA fix, nor why > it enables mcasp. > > Here's the thread on the alsa-devel list where we figured it > out: > > http://mailman.alsa-project.org/pipermail/alsa-devel/2016-April/107061.html > > Is the best way to report this problem here on the list like > this, or to open an issue on github/dtb-rebuilder? > > Note that this is all with kernel 4.4.7-bone-rt-r9. Not sure > to how many other versions it applies. > > Thanks! > > -- > Rick Mann > rm...@latencyzero.com > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/77DEEFDD-F2AC-494B-A8AC-6BC54F19EEC3%40latencyzero.com. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/55916E28-05ED-4C01-89A5-5C6D30741FA9%40gmail.com. For more options, visit https://groups.google.com/d/optout.
