linux-kernel - Re: [PATCH V1] firmware: tegra: early resume bpmp

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Message-ID: <577c405d-249b-00ce-221e-bff7cc9ed8b7@nvidia.com>
Date:   Fri, 14 Jun 2019 09:40:48 -0700
From:   Bitan Biswas <bbiswas@...dia.com>
To:     Thierry Reding <thierry.reding@...il.com>
CC:     Thierry Reding <treding@...dia.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Timo Alho <talho@...dia.com>,
        Sivaram Nair <sivaramn@...dia.com>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V1] firmware: tegra: early resume bpmp



On 6/14/19 8:48 AM, Thierry Reding wrote:
> On Fri, Jun 14, 2019 at 05:31:39AM -0700, Bitan Biswas wrote:
>> Early resume Tegra bpmp to fix Xavier clock rate error as follows:
>> [  159.017101] of_serial 3110000.serial: calling platform_pm_resume+0x0/0x58 @ 317, parent: cbb
>> [  159.025501] of_serial 3110000.serial: platform_pm_resume+0x0/0x58 returned 0 after 14 usecs
>> [  159.033694] tegra-i2c 31c0000.i2c: calling platform_pm_resume+0x0/0x58 @ 317, parent: cbb
>> [  159.042254] tegra-i2c 31c0000.i2c: failed changing clock rate: -22
>> [  159.048216] PM: dpm_run_callback(): platform_pm_resume+0x0/0x58 returns -22
>> [  159.055553] tegra-i2c 31c0000.i2c: platform_pm_resume+0x0/0x58 returned -22 after 13072 usecs
>> [  159.063875] PM: Device 31c0000.i2c failed to resume: error -22
>>
>> Signed-off-by: Bitan Biswas <bbiswas@...dia.com>
>> ---
>>   drivers/firmware/tegra/bpmp.c | 4 +++-
>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c
>> index dd775e8..de09036 100644
>> --- a/drivers/firmware/tegra/bpmp.c
>> +++ b/drivers/firmware/tegra/bpmp.c
>> @@ -811,7 +811,9 @@ static int __maybe_unused tegra_bpmp_resume(struct device *dev)
>>   		return 0;
>>   }
>>   
>> -static SIMPLE_DEV_PM_OPS(tegra_bpmp_pm_ops, NULL, tegra_bpmp_resume);
>> +const struct dev_pm_ops tegra_bpmp_pm_ops = {
>> +	.resume_early = tegra_bpmp_resume
>> +};
> 
> I've changed this to be static while applying to for-5.3/firmware.
Is this patch already part of some other patch? In that case I can 
abandon the patch.

Else, I shall add static keyword.


-regards,
  Bitan