On Sun, Oct 06, 2019 at 12:04:47PM -0500, Adam Ford wrote: I think the best one who may shed a light is bigeasy@ (Cc'ed). > Has anyone else had any issues using the CONFIG_SERIAL_8250_DMA on the OMAP? > > I can use the DMA on the legacy, omap-serial driver, but when I enable > the DMA on the 8250-omap driver, I get missing frames in Bluetooth. > > The older driver seems to have an ISR that seems to address a variety > of items compared to the very tiny ISR for 8250-omap.c. > > I am not exactly sure where to start, but if someone has any > suggestions on how I can troubleshoot, please let me know. As of now, > I have to disable CONFIG_SERIAL_8250_DMA to get the Bluetooth > connected to UART2 operational on a DM3730 at 3,000,000 baud, but it > appears to work just fine after some patches I just submitted for > handling RTS/CTS. The legacy omap-serial driver works fine with DMA. > > adam -- With Best Regards, Andy Shevchenko
