From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>,
"linux-i2c@vger.kernel.org" <linux-i2c@vger.kernel.org>,
Andi Shyti <andi.shyti@kernel.org>
Subject: Re: i2c: designware: unhandled interrupt on N100 lpss channel 0
Date: Fri, 22 Mar 2024 18:18:30 +0200 [thread overview]
Message-ID: <Zf2vVsiW2KCEQU-U@smile.fi.intel.com> (raw)
In-Reply-To: <ef403546-f696-4adb-a441-1d8c71712704@gmail.com>
On Thu, Mar 21, 2024 at 10:00:27PM +0100, Heiner Kallweit wrote:
> On 21.03.2024 18:33, Andy Shevchenko wrote:
> > On Thu, Mar 21, 2024 at 12:59:59PM +0100, Heiner Kallweit wrote:
> >> On 21.03.2024 12:20, Andy Shevchenko wrote:
> >>> On Wed, Mar 20, 2024 at 10:26:06PM +0100, Heiner Kallweit wrote:
> >>>> On 20.03.2024 22:07, Andy Shevchenko wrote:
> >>>>> On Wed, Mar 20, 2024 at 09:21:34PM +0100, Heiner Kallweit wrote:
> >>>>>> On 20.03.2024 16:59, Andy Shevchenko wrote:
> >>>>>>> On Wed, Mar 20, 2024 at 03:56:29PM +0100, Heiner Kallweit wrote:
...
> >>>>>>> grep 0000001b /sys/kernel/debug/pinctrl/*/pins
> >>>>>>
> >>>>>> pin 3 (GPPC_B_3) 3:INTC1057:00 GPIO 0x80100102 0x0000001b 0x00000000 [LOCKED tx]
> >>>>>> pin 82 (GPP_F_7_EMMC_CMD) 135:INTC1057:00 GPIO 0x44000300 0x0000001b 0x00000000 [LOCKED full, ACPI]
> >>>>>> pin 182 (GPPC_C_13) 269:INTC1057:00 GPIO 0x44000300 0x0000001b 0x00000000 [LOCKED full, ACPI]
> >>>>>
> >>>>> I was not correct, the value to grep is '0000[0-3][0-9a-f]1b' as there pull
> >>>>> up/down can be enabled.
> >>>>>
> >>>> Result is the same
> >>>>
> >>>>> Nevertheless from the above the pin 3 is one that is enabled as GPIO input with
> >>>>> RTE 27 and direct IRQ. If it's a culprit, try to add in the pinctrl-intel.c at
> >>>>> the end of .probe:
> >>>>>
> >>>>> {
> >>>>> void __iomem *padcfg0;
> >>>>> u32 value;
> >>>>>
> >>>>> padcfg0 = intel_get_padcfg(pctrl, 3, PADCFG0);
> >>>>>
> >>>>> value = readl(padcfg0);
> >>>>> value |= PADCFG0_GPIOTXDIS;
> >>>>> value |= PADCFG0_GPIORXDIS;
> >>>>> writel(value, padcfg0);
> >>>>> }
> >>>>>
> >>>>> If it helps, it will show the BIOS bug (likely).
> >>>>>
> >>>> Wow, this indeed fixes the issue for me. Thanks a lot!
> >>>
> >>> Wow! Glad to hear this.
> >>> (Side note, can you test the patch against idma64 I sent yesterday?
> >>> Tested-by tag will be appreciated!)
> >>>
> >> Done, sent the Tested-by
> >
> > Thank you!
> >
> >>> We may try to have the quirk in the kernel, but it might be (quite) tricky
> >>> (see the link below).
> >>>
> >>> Can you share `acpidump -o n100-tables.dat` (the file) somewhere?
> >>> I would like to see if this pin is anyhow being mentioned in the DSDT.
> >>>
> >> Attached. Compressed file isn't that big, so hope it's ok to send it
> >> as an attachment.
> >
> > Yes, got it.
> >
> > Can you also share the output of
> >
> > 1) `dmesg` (when kernel command line has 'ignore_loglevel apic=debug');
> attached
> > 2) `lspci -nk -vv`;
> attached
> > 3) `grep -H 15 /sys/bus/acpi/devices/*/status`?
> >
> /sys/bus/acpi/devices/ACPI0003:00/status:15
> /sys/bus/acpi/devices/ACPI000C:00/status:15
> /sys/bus/acpi/devices/ACPI000E:00/status:15
> /sys/bus/acpi/devices/device:4a/status:15
> /sys/bus/acpi/devices/device:86/status:15
> /sys/bus/acpi/devices/device:87/status:15
> /sys/bus/acpi/devices/device:88/status:15
> /sys/bus/acpi/devices/device:8a/status:15
> /sys/bus/acpi/devices/device:8b/status:15
> /sys/bus/acpi/devices/device:8c/status:15
> /sys/bus/acpi/devices/INT33A1:00/status:15
> /sys/bus/acpi/devices/INTC1041:00/status:15
> /sys/bus/acpi/devices/INTC1048:00/status:15
> /sys/bus/acpi/devices/INTC1057:00/status:15
> /sys/bus/acpi/devices/INTC1070:00/status:15
> /sys/bus/acpi/devices/INTC1099:00/status:15
> /sys/bus/acpi/devices/MSFT0001:00/status:15
> /sys/bus/acpi/devices/OVTI01AS:00/status:15
> /sys/bus/acpi/devices/OVTID858:00/status:15
> /sys/bus/acpi/devices/PNP0103:00/status:15
> /sys/bus/acpi/devices/PNP0C09:00/status:15
> /sys/bus/acpi/devices/PNP0C0C:00/status:15
> /sys/bus/acpi/devices/PNP0C0D:00/status:15
> /sys/bus/acpi/devices/PRP00001:00/status:15
> /sys/bus/acpi/devices/TXNW3643:00/status:15
> /sys/bus/acpi/devices/TXNW3643:01/status:15
Can you also add this
grep -H 15 /sys/bus/acpi/devices/*/status | while read x; do grep -H . `dirname $x`/path; done
?
> >>>> For my understanding: Shall we (kernel driver) rely on the BIOS to configure
> >>>> GPIO's properly?
> >>>
> >>> Yes, but there are bugs.
> >>> You may look, e.g., https://bugzilla.kernel.org/show_bug.cgi?id=214749.
> >>>
> >>>> Or better assume that GPIO's are in an unknown state on
> >>>> driver load and configure them for our needs?
> >>>
> >>> It depends. But usually (> 99% cases) we rely on the firmware.
> >>>
> >>>> IOW: If we assume that other systems may have similar issues, should
> >>>> "some driver" use e.g. the pinctrl API to configure relevant pins?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2024-03-22 16:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-19 21:11 i2c: designware: unhandled interrupt on N100 lpss channel 0 Heiner Kallweit
2024-03-20 12:27 ` Heiner Kallweit
2024-03-20 13:37 ` Jarkko Nikula
2024-03-20 14:15 ` Andy Shevchenko
2024-03-20 14:56 ` Heiner Kallweit
2024-03-20 15:59 ` Andy Shevchenko
2024-03-20 20:21 ` Heiner Kallweit
2024-03-20 21:07 ` Andy Shevchenko
2024-03-20 21:21 ` Andy Shevchenko
2024-03-20 21:26 ` Heiner Kallweit
2024-03-20 21:28 ` Heiner Kallweit
2024-03-21 11:20 ` Andy Shevchenko
2024-03-21 11:59 ` Heiner Kallweit
2024-03-21 17:33 ` Andy Shevchenko
2024-03-21 21:00 ` Heiner Kallweit
2024-03-22 16:18 ` Andy Shevchenko [this message]
2024-03-22 19:28 ` Heiner Kallweit
2024-04-02 20:46 ` Andy Shevchenko
2024-04-05 16:01 ` Andy Shevchenko
2024-04-05 19:21 ` Heiner Kallweit
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