Re: [REGRESSION] amdgpu with Thunderbolt eGPU bracket fails since new bridge window alignment calculation code

["Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>]

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On Thu, 2 Apr 2026, Jonas Höglund wrote:

> On Thu, 2 Apr 2026, at 16:51, Jonas Höglund wrote:
> > Here are dmesg logs (with the appropriate dyndbg cmdline flag) for both
> > cases, in case it's useful:
> >
> > https://up.firefly.nu/pub/amdgpu-egpu-crash-7.0.0-rc6.dmesg.txt
> > https://up.firefly.nu/pub/amdgpu-egpu-good-pci-resource.dmesg.txt
> 
> Actually, now that I look closer at the good-case dmesg (just after
> sending the email, typical), I guess I'm not sure how happy the driver
> and dock really are.  Well, I'll let you weigh in since you're more
> intimately familiar with the subsystem and expected debug messages.

Hi,

Even the "good" case does fail to enlarge the eGPU resource because some 
of the upstream bridge window are pinned by other resources.

It is a problem that has come up multiple times over the past few years 
but it's also a problem that is not very easy to solve (but I'm working on 
it). The sizing needs to be corrected earlier than that point (before the 
other resources pin those bridge windows), at the time we discover that 
BAR resize fails, it's already way too late to correct things.


-- 
 i.