Hi Arnd,
Am 09.01.2018 um 22:33 schrieb Arnd Bergmann:
On Tue, Jan 9, 2018 at 8:28 PM, Stefan Wahren <stefan.wahren@xxxxxxxx> wrote:
The dwc2 USB driver tries to find a generic PHY first and then look
for an old style USB PHY. In case of a valid generic PHY node without
a PHY driver, the PHY layer will return -EPROBE_DEFER forever. So dwc2
will never tries for an USB PHY.
Fix this issue by finding a generic PHY and an old style USB PHY
at once.
This would fix only one of the USB controllers (dwc2), but not the others
that are affected. As I wrote in my suggested patch, dwc3 appears to be
affected the same way, and all other host drivers that call usb_add_hcd()
without first setting hcd->phy would suffer from this as well.
If we go down the route of addressing it here in the hcd drivers, we should
at least change all three of those, and hope this doesn't regress in
another way.
Arnd
i fully unterstand. But we leaving the path of "fixing a critical issue
on BCM2835" and go to "fixing multiple USB host controller". I do this
all in my spare time and don't have any of the other USB controller
available. So before i proceed with any other patch i like so see some
feedback from John, Greg or Felipe.
After finalizing this patch i think the chance is little that this would
be applied to 4.15. So i seems to me that we still revert my DT clean up
patch.
Stefan
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