linux-kernel - Re: [PATCH] clocksource/drivers/timer-ti-dm: Fix suspend and resume for am3 and am4

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Date:   Tue, 21 Jul 2020 09:05:44 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Tony Lindgren <tony@...mide.com>, Carlos Hernandez <ceh@...com>
CC:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Roger Quadros <rogerq@...com>
Subject: Re: [PATCH] clocksource/drivers/timer-ti-dm: Fix suspend and resume
 for am3 and am4

On 7/20/20 8:00 PM, Tony Lindgren wrote:
> * Carlos Hernandez <ceh@...com> [200717 21:35]:
>> On 7/17/20 6:29 AM, Daniel Lezcano wrote:
>>> On 13/07/2020 18:26, Tony Lindgren wrote:
>>>> Fixes: 52762fbd1c47 ("clocksource/drivers/timer-ti-dm: Add clockevent and clocksource support")
>>>> Reported-by: Carlos Hernandez <ceh@...com>
>>>> Signed-off-by: Tony Lindgren <tony@...mide.com>
>>>> ---
>>> Carlos, were you able to test this patch ?
>>
>> Tested the patch on top of 5.8-rc5.
>>
>> cbdb2617290d (HEAD) clocksource/drivers/timer-ti-dm: Fix suspend and resume
>> for am3 and am4
>> 11ba468877bb (tag: v5.8-rc5) Linux 5.8-rc5
>>
>> It works on am335x-evm but fails on am437x-evm
> 
> Thanks for testing.
> 
>> am4:
>>
>> CCCCCCCC** 1196 printk messages dropped **
> 
> The above does not look normal..
> 
>> 44000000.ocp:L3 Custom Error: MASTER DSS TARGET GPMC (Read)
>> ** 34 printk messages dropped **
> 
> ..but the above points to the GPMC module failing to suspend.
> This seems to be some other GPMC specific issue not related
> to the system timers.

So, I guess this patch can still go into v5.8 while the AM437x GP EVM
failures are root caused.

Carlos, Daniel is looking for your tested by. Can you send it because it
fixes the original problem report with dmtimer?

Thanks,
Sekhar