[RFC PATCH 0/5] drivers: usb: dwc3: sync code with Linux v6.16-rc1

[Marek Vasut]

On 11/25/25 10:41 AM, Jerome Forissier wrote:

Hello Jerome,

> linux (master)$ git log --oneline --no-merges v3.19-rc1..HEAD drivers/usb/dwc3 | wc -l
> 1347
> 
> That's a lot of commits. What exactly do we gain by doing this? Some
> of the commits are not applicable to u-boot or need adaptations
> (unsupported platforms, power management, debug/tracing, interrupts,
> and probably other things I don't remember).

History of changes and likely git bisect ability.

It would be at least good to know, which of the kernel patches are part 
of the U-Boot DWC3 stack and which are missing, otherwise we might be 
missing fixes that are in Linux, which worries me.

>> - Check what might be missing
> 
> Essentially, many of the u-boot commits in:
> 
> u-boot (master)$ git log --oneline --no-merges 85d5e7075f3..HEAD drivers/usb/dwc3 | wc -l
> 216
> 
> I compared the linux and u-boot commit log and only 13 of these 216
> commits have the exact same subject as a Linux commit after v3.19-rc1.
> So that's probably 13 cherry-picks and 203 commits that are more or
> less u-boot specific.

That means U-Boot dwc3 driver started diverging, but also picked random 
change from Linux here and there (see paragraph above).

> Also note that the DWC3 driver has dependencies on:
> 
> drivers/usb/host/xhci-ext-caps.h
> drivers/usb/gadget/epautoconf.c
> drivers/usb/gadget/udc/udc-core.c
> 
> ...which also need to be synced so that's a few more commits to
> cherry-pick actually.
> 
> All things being considered, I think it is better to minimize the
> number of commits. Sync with linux then fix. We can probably squash
> the first three commits in my series so that only one commit is broken
> build-wise. This way there is little impact on bisectability.
> 
> In any case we also need more testing on real boards.
I wonder if we could pick patches on top of the old U-Boot dwc3 import 
commit, if we could at least understand that the additions won't break 
existing DWC3 support. Because those picked patches could at least be 
understood, unlike a mega-commit.