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Date:   Fri, 11 Nov 2022 09:53:29 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     "Limonciello, Mario" <Mario.Limonciello@amd.com>
Cc:     "stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: USB4 DP tunneling fix for 6.0.y/5.15.y
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On Thu, Nov 10, 2022 at 03:36:30PM +0000, Limonciello, Mario wrote:
> [Public]
> 
> Hi,
> 
> USB4 DP tunneling has a bug in 6.0.y and 5.15.y that was fixed in 6.1.
> Basically if the Pre-OS connection manager has set up USB4 DP tunnels they're ignored by the OS so you'll have a "working" display in firmware and once the Linux kernel boots up you use lose the display.
> Hot plugging works around the issue.
> 
> For 6.0.y can you please take this commit to fix it:
> b60e31bf18a7 ("thunderbolt: Add DP OUT resource when DP tunnel is discovered")
> 
> For 5.15.y can you please take these two commits to fix it:
> 43bddb26e20a ("thunderbolt: Tear down existing tunnels when resuming from hibernate")
> b60e31bf18a7 ("thunderbolt: Add DP OUT resource when DP tunnel is discovered")

Now queued up, thanks.

greg k-h