On Tue, Mar 23, 2021 at 09:43:26AM +0200, Tony Lindgren wrote:
> There is a timer wrap issue on dra7 for the ARM architected timer.
> In a typical clock configuration the timer fails to wrap after 388 days.
>
> To work around the issue, we need to use timer-ti-dm percpu timers instead.
>
> Let's configure dmtimer3 and 4 as percpu timers by default, and warn about
> the issue if the dtb is not configured properly.
Hi Tony,
This causes a conflict for IPU2 which is using timer 3 and 4.
>From arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi:
&ipu2 {
mboxes = <&mailbox6 &mbox_ipu2_ipc3x>;
ti,timers = <&timer3>;
ti,watchdog-timers = <&timer4>, <&timer9>;
};
I noticed an error ("could not get timer platform device") when booting
mainline on a BeagleBoard X15 (AM578):
omap-rproc 55020000.ipu: assigned reserved memory node ipu2-memory@95800000
remoteproc remoteproc1: 55020000.ipu is available
remoteproc remoteproc1: powering up 55020000.ipu
remoteproc remoteproc1: Booting fw image dra7-ipu2-fw.xem4, size 3747220
omap-rproc 55020000.ipu: could not get timer platform device
omap-rproc 55020000.ipu: omap_rproc_enable_timers failed: -19
remoteproc remoteproc1: can't start rproc 55020000.ipu: -19
I switched this errata fix to use timer 15 and 16 instead which resolves
the error. Do you think that is an acceptable solution?
If so, I will post the patch to the list.
Thanks,
Drew
