[UBOOT PATCH 0/3] Port the usb reset patches from linux

Michal Simek michal.simek at amd.com
Wed May 17 08:37:18 CEST 2023


On 5/8/23 13:56, Marek Vasut wrote:
> On 5/8/23 05:00, Venkatesh Yadav Abbarapu wrote:
>> Port the usb reset patches from linux kernel.
> What kind of patches are these ?
> What sort of problem are those patches attempting to address ?
>> Venkatesh Yadav Abbarapu (3):
>>    usb: dwc3: core: improve reset sequence
>>    usb: dwc3: gadget: Don't send unintended link state change
>>    usb: dwc3: core: Only handle soft-reset in DCTL
> These seem to be randomly picked patches from Linux 4.7, 5.5 ... but there seem 
> to be a huge amount of backports missing inbetween, which would create a 
> tremendous maintenance burden of the DWC3 driver.
> Can you please instead pick ALL the missing patches from Linux, so that the DWC3 
> driver is instead synchronized with Linux, rather than diverging and growing 
> partial backports ?
> It shouldn't be difficult, one approach I can think of is roughly this:
> - figure out the original merge base from which the DWC3 driver was imported to 
> U-Boot
> - in U-Boot, revert all dwc3 patches on top of that import patch
> - pick all Linux kernel dwc3 patches from that merge base and apply on top of 
> this U-Boot with reverts
> - Run rebase and drop the reverts, let git drop duplicate patches

Based on internal discussion decision was made to keep these patches only in soc 
vendor tree. We are not happy with it but we are not going to invest our time 
and take responsibility for the driver synchronization work at this point.
That's why if you insist on full synchronization with Linux version please 
ignore this patchset and also serarate dwc3 clock patch.


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