Re: [PATCH] arm64: dts: rockchip: add usb3 controller node for RK3328 SoCs

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The usb3 issue Heiko describe is still there, my usb3 device is only discovered once on my Rock 64.
I must have only tested inserting my usb3 devices once when I testing before.

Regards,
Jonas

On 2019-03-14 20:52, Jonas Karlman wrote:
> I have been using that clk patch since I started initial testing of rk3328 on mainline 4.16 [1]
> and I cannot remember seeing any real issue with usb2/usb3 (beside usb regulator related issue).
> The clk patch may have helped with some usb issues that I never experienced :-)
>
> [1] https://github.com/Kwiboo/linux-rockchip/commits/rockchip-4.16/drivers/clk/rockchip
>
> Regards,
> Jonas
>
> On 2019-03-14 20:24, Peter Geis wrote:
>> Has anyone tested this since Jonas Karlman's clk patch landed?
>> I noticed a lot of my USB hotplug issues disappeared when I pulled
>> that patch in.
>> Especially since one of the fixes was aclk_usb3otg, since it was
>> incorrectly defined to usb2's aclk.
>>
>> On Thu, Mar 14, 2019 at 3:21 PM Heiko Stübner <heiko@xxxxxxxxx> wrote:
>>> Hi again :-)
>>>
>>> Am Donnerstag, 14. März 2019, 20:08:30 CET schrieb Leonidas P. Papadakos:
>>>> I must say with my testing, I never really have any disconnects. My
>>>> drive generally works
>>> It's not any disconnects, it is really when you unplug the device from
>>> the root port that the
>>>
>>>> Surely it's better that it works somewhat than not at all.
>>>> Maybe we could include the patches and revert them later if a solution
>>>> arrises?
>>>>
>>>> Or is that against the Linux way of doing things?
>>> The main issue is
>>>                compatible = "rockchip,rk3328-dwc3", "rockchip,rk3399-dwc3";
>>>
>>> because:
>>> (1) On the devicetree-side you declare that they are compatible which may
>>>     or may not conflict with needed later changes
>>> (2) On the kernel-driver-side with the current status the rk3328-dwc3
>>>     will get ignored and rk3399-dwc3 used to bind to the generic dt-dwc3
>>>     driver.
>>>     From looking at the Rockchip code in the vendor kernel we may very well
>>>     need a separate driver to handle the big issue which creates the issue
>>>     which driver will bind to the dt-node. It will be either the generic one
>>>     binding to the rk3399-dwc3 or the special one binding to rk3328-dwc3.
>>>     And sadly it will probably depend on which module gets loaded first.
>>>
>>> And devicetrees are supposed to be backwards compatible so a newer
>>> kernel should keep working with an old devicetree.
>>>
>>> A possible way forward would be to introduce a separate compatible for
>>> rk3328 (both in the binding doc and the generic dwc3 driver), so that
>>> we get only a
>>>                compatible = "rockchip,rk3328-dwc3";
>>>
>>> Which then even can move easily into a new driver if necessary without
>>> causing issues for existing devicetrees.
>>>
>>> Heiko
>>>
>>>
>>>
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