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Re: [BUG]i2c_hid_acpi broken with 4.17.2 on Framework Laptop 13 AMD
On 18.12.2023 17:21, Sébastien Chaumat wrote:
>>>>> On 05.12.2023 21:31, Sébastien Chaumat wrote:
>>> This issue seems that IRQ 7 (the GPIO controller) is natively fasteoi
>>> (so level type) while in xen it is mapped to oapic-edge instead of
>>> oapic-level
>>> as the SSDT indicates :
>>>
>>> Device (GPIO)
>>>
>>> {
>>> Name (_HID, "AMDI0030") // _HID: Hardware ID
>>> Name (_CID, "AMDI0030") // _CID: Compatible ID
>>> Name (_UID, Zero) // _UID: Unique ID
>>> Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
>>> {
>>> Name (RBUF, ResourceTemplate ()
>>> {
>>> Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
>>> {
>>> 0x00000007,
>>> }
>>> Any idea why ?
>>
>> Information coming from AML is required to be handed down by Dom0 to Xen.
>> May want checking that (a) Dom0 properly does so and (b) Xen doesn't screw
>> up in consuming that data. See PHYSDEVOP_setup_gsi. I wonder if this is
>> specific to it being IRQ7 which GPIO uses, as at the (master) PIC IRQ7 is
>> also the spurious vector. You may want to retry with the tip of the 4.17
>> branch (soon to become 4.17.3) - while it doesn't look very likely to me
>> that recent backports there were related, it may still be that they make
>> a difference.
>>
>
> testing with 4.17.3:
>
> Adding some printk in PHYSDEVOP_setup_gsi, I see (in xl dmesg) that
> (XEN) PHYSDEVOP_setup_gsi setup_gsi : gsi: 7 triggering: 1 polarity: 1
>
> but later on in dmesg I see :
> [ 1.747958] xen: registering gsi 7 triggering 0 polarity 1
>
> So triggering is flipped from 1 to 0 (cannot find the definition for
> those values).
> Could this be the culprit ?
Possibly. Since it would be the kernel to invoke PHYSDEVOP_setup_gsi, it
looks as if the kernel was confused about which trigger mode to use. Have
you figured from where the kernel takes the two different values?
Would you mind pointing me to the definition for those values first ? I did not find what 0/1 means in this context.
Thanks
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