> -----Original Message-----
> From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
>
> Hi Wentong,
>
> On Mon, Mar 27, 2023 at 02:23:08PM +0800, Wentong Wu wrote:
> > Inside IVSC, switching ownership requires an interface with two
> > different hardware modules, ACE and CSI. The software interface to
> > these modules is based on Intel MEI framework. Usually mei client
> > devices are dynamically created, so the info of consumers depending on
> > mei client devices is not present in the firmware tables.
>
> Ouch.
MEI client devices are not ACPI devices in our case.
>
> >
> > This causes problems with the probe ordering with respect to drivers
> > for consumers of these mei client devices. But on these camera sensor
> > devices, the ACPI nodes describing the sensors all have a _DEP
> > dependency on the matching INTC1059 ACPI device, so adding INTC1059 to
> > acpi_honor_dep_ids allows solving the probe-ordering problem by
> > delaying the enumeration of ACPI-devices which have a _DEP dependency on
> an INTC1059 device.
>
> What does the INTC1059 device represent?
This is the IVSC device on which camera sensor has _DEP
Device (CVFD)
{
Name (_HID, "INTC1059") // _HID: Hardware ID
Name (_DDN, "Intel CVF Device") // _DDN: DOS Device Name
Method (SID, 1, Serialized)
{
Return (HCID (One))
}
}
Device (LNK1)
{
Name (PNIO, Package (0x01)
{
"\\_SB.PC00.SPI1.SPFD.CVFD"
})
Name (PUSB, Package (0x02)
{
"\\_SB.PC00.SPI1.SPFD.CVFD",
"\\_SB.PC00.XHCI.RHUB.HS08.VIC0"
})
Method (_STA, 0, NotSerialized) // _STA: Status
{
If (L1EN)
{
Return (0x0F)
}
Else
{
Return (Zero)
}
}
Method (_DEP, 0, NotSerialized) // _DEP: Dependencies
{
If (L1EN)
{
If ((CVFS == 0x02))
{
Return (PUSB) /* \_SB_.PC00.LNK1.PUSB */
}
If ((CVFS == One))
{
Return (PNIO) /* \_SB_.PC00.LNK1.PNIO */
}
Else
{
Return (CDEP (L1CL, L1BS))
}
}
Else
{
Return (Package (0x01)
{
PC00
})
}
}
>
> --
> Sakari Ailus
