Re: [PATCH v2 19/22] thunderbolt: Add Apple Silicon support

[Mika Westerberg <mika.westerberg@linux.intel.com>]

Hi,

On Wed, Sep 09, 2026 at 05:20:35PM +0200, Sven Peter wrote:
> Hi,
> 
> On 09.09.26 08:06, Mika Westerberg wrote:
> 
> [...]
> 
> > 
> > If it is possible, I suggest to use the same way we do in ACPI side here:
> > 
> > https://learn.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports#map-native-protocols-pcie-displayport-tunneled-through-usb4-to-usb4-host-routers
> > 
> > It was specifically designed so that it should support DT as well (that's
> > why it uses the device properties _DSD).
> 
> Oh, nice, I didn't know those existed. Konrad already has a PR open to add
> these to dt-schema [1] and a PR that already makes use of these for dwc3
> [2].

Great.

> I can just write generic code similar to the ACPI one then to add the device
> links and split it off from this series, though I think that dt-schema PR
> must be merged before we're allowed to use that representation.
> I'll adjust the dt-bindings here for v3 to just drop the representation as
> OF ports/endpoints as well.
> For the PCIe/DP tunnel notifications I should be able to use the same
> representation, possibly with an additional usb4-adapter-index property or
> similar to differentiate between the two DP IN adapters, once I get to that
> then.

For PCIe yes, for DP you should not need those at all.