From: Drew Fustini <dfustini@baylibre.com>
To: Tony Lindgren <tony@atomide.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>, Keerthy <j-keerthy@ti.com>,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Tero Kristo <kristo@kernel.org>, Suman Anna <s-anna@ti.com>
Subject: Re: [PATCH 2/2] clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940
Date: Sat, 29 Jan 2022 13:05:31 -0800 [thread overview]
Message-ID: <YfWsG0p6to3IJuvE@x1> (raw)
In-Reply-To: <20210323074326.28302-3-tony@atomide.com>
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
next prev parent reply other threads:[~2022-01-29 21:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 7:43 [PATCHv2 0/2] Fixes for for dra7 timer wrap errata i940 Tony Lindgren
2021-03-23 7:43 ` [PATCH 1/2] clocksource/drivers/timer-ti-dm: Prepare to handle dra7 timer wrap issue Tony Lindgren
2021-04-09 10:27 ` [tip: timers/core] " tip-bot2 for Tony Lindgren
2021-03-23 7:43 ` [PATCH 2/2] clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940 Tony Lindgren
2021-04-09 10:27 ` [tip: timers/core] " tip-bot2 for Tony Lindgren
2022-01-29 21:05 ` Drew Fustini [this message]
2022-01-31 10:16 ` [PATCH 2/2] " Tony Lindgren
2022-02-02 20:54 ` Drew Fustini
-- strict thread matches above, loose matches on Subject: below --
2021-03-04 7:37 [PATCH 0/2] Fixes for for " Tony Lindgren
2021-03-04 7:37 ` [PATCH 2/2] clocksource/drivers/timer-ti-dm: Handle " Tony Lindgren
2021-03-22 10:15 ` Daniel Lezcano
2021-03-22 10:17 ` Tony Lindgren
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