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From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: Carl Huang <cjhuang@codeaurora.org>,
	Loic Poulain <loic.poulain@linaro.org>,
	ath11k@lists.infradead.org,
	linux-arm-msm <linux-arm-msm@vger.kernel.org>,
	linux-wireless@vger.kernel.org, regressions@lists.linux.dev,
	mhi <mhi@lists.linux.dev>
Subject: Re: [regression] mhi: ath11k resume fails on some devices
Date: Thu, 21 Oct 2021 15:31:11 +0530	[thread overview]
Message-ID: <20211021100111.GC7580@workstation> (raw)
In-Reply-To: <874k9t9n13.fsf@codeaurora.org>

On Thu, Oct 07, 2021 at 12:55:52PM +0300, Kalle Valo wrote:
> (adding also mhi list)
> 
> Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> writes:
> 
> > On Fri, Sep 24, 2021 at 12:07:41PM +0300, Kalle Valo wrote:
> >> Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> writes:
> >> 
> >> > For aid debugging, please see the state the device is in during mhi_pm_resume().
> >> > You can use below diff:
> >> >
> >> > diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
> >> > index fb99e3727155..482d55dd209e 100644
> >> > --- a/drivers/bus/mhi/core/pm.c
> >> > +++ b/drivers/bus/mhi/core/pm.c
> >> > @@ -898,6 +898,9 @@ int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
> >> >         if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
> >> >                 return -EIO;
> >> >  
> >> > +       dev_info(dev, "Device state: %s\n",
> >> > +                TO_MHI_STATE_STR(mhi_get_mhi_state(mhi_cntrl)));
> >> > +
> >> >         if (mhi_get_mhi_state(mhi_cntrl) != MHI_STATE_M3)
> >> >                 return -EINVAL;
> >> 
> >> This is what I get with my NUC testbox:
> >> 
> >> [  970.488202] ACPI: EC: event unblocked
> >> [  970.492484] hpet: Lost 1587 RTC interrupts
> >> [  970.492749] mhi mhi0: Device state: RESET
> >
> > Looks like the MHI device went into RESET state! It also looks to be a
> > firmware thing. But let's nail this down before adding any workaround in
> > the MHI stack.
> >
> > Can you also rebuild the kernel with MHI debug enabled and capture the
> > logs in faliure case?
> 
> So what I should exactly do to enable debug messages?
> 
> I have this in my Kconfig:
> 
> CONFIG_MHI_BUS=m
> # CONFIG_MHI_BUS_DEBUG is not set
> # CONFIG_MHI_BUS_PCI_GENERIC is not set
> 
> And AFAICS CONFIG_MHI_BUS_DEBUG only enables the debugfs interface, I
> doubt you meant that.
> 

No. You should enable the dev_dbg messages in MHI core by adding the -DDEBUG
flag to the Makefile or by CONFIG_DYNAMIC_DEBUG.

Thanks,
Mani

> -- 
> https://patchwork.kernel.org/project/linux-wireless/list/
> 
> https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

  reply	other threads:[~2021-10-21 10:01 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-16  8:00 Kalle Valo
2021-09-16 10:18 ` Loic Poulain
2021-09-16 11:12   ` Manivannan Sadhasivam
     [not found]     ` <CAMZdPi94607mZorp+Zmkw3seWXak6p9Jr05CQ5hhfgKQoG8n7Q@mail.gmail.com>
2021-09-16 16:35       ` Manivannan Sadhasivam
2021-09-16 16:42         ` Kalle Valo
2021-09-16 17:19           ` Manivannan Sadhasivam
2021-09-23  8:34             ` Carl Huang
2021-09-23  8:59               ` Manivannan Sadhasivam
2021-09-23  9:26                 ` Carl Huang
2021-09-23 10:50                   ` Loic Poulain
2021-09-24  9:07                 ` Kalle Valo
2021-09-24  9:57                   ` Manivannan Sadhasivam
2021-10-07  9:55                     ` Kalle Valo
2021-10-21 10:01                       ` Manivannan Sadhasivam [this message]
2021-09-24  8:36   ` Kalle Valo
2021-09-24  9:43     ` Loic Poulain
2021-09-24 10:00       ` Manivannan Sadhasivam
2021-10-07  9:48       ` Kalle Valo
2021-10-19 12:12         ` Kalle Valo
2021-10-21 10:03           ` Manivannan Sadhasivam
2021-11-12 11:36             ` Thorsten Leemhuis
2021-11-18 17:41             ` Manivannan Sadhasivam
2021-12-01  7:34               ` Thorsten Leemhuis
2021-09-25 17:40 ` Thorsten Leemhuis

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