On Monday 16 April 2018 09:15 PM, Tony Lindgren wrote: > * Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx> [180416 15:19]: >> Hi, >> >> I'm not entirely sure what's going on, but I see corrupted characters >> with the serial console on the OMAP4430 SDP board. During boot, >> everything seems fine, the problem appears to be userspace output. >> >> For example, if I edit a file, then quit vi: >> >> :q■■%■■B■■Z■root@omap-4430sdp:~# > > I don't think I've seen that one. What I've seen few times is > typing a key on the serial console echoing back the previous > character typed while the new character won't get displayed > until hitting keyboard again. Only rebooting the device seems > to solve this. This is with 4430 ES2.3 revision. > > I wonder if we're missing some parts of errata i202 handling > in omap_8250_mdr1_errataset()? > > Also, I'm seeing an issue where the UARTs won't idle on init > with 8250_omap driver if connected to the wl12xx bluetooth port > unless I write some data to the port first. It does not seem > to be related to the rts/cts lines being wired as I've tested > muxing them out of the way. > If this instance of UART is using DMA then it might be due an errata worked around in AM33/AM43/DRA7: https://patchwork.kernel.org/patch/6784331/ -- Regards Vignesh -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
