Re: [PATCH v6 3/8] usb: chipidea: Add support for Tegra20/30/114/124

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On 16/08/17 11:32, Dmitry Osipenko wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
> 
> All of these Tegra SoC generations have a ChipIdea UDC IP block that can
> be used for device mode communication with a host. Implement rudimentary
> support that doesn't allow switching between host and device modes.
> 
> Tested-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> [digetx@xxxxxxxxx: rebased patches and added DMA alignment quirk for Tegra20]
> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
> Acked-by: Peter Chen <peter.chen@xxxxxxx>

Currently, I am seeing that system suspend on Tegra30/114/124 is broken
on -next (looks like it broke starting with next-20170823). Bisect shows
that is broke with this series and reverting this patch of top of tree
does workaround the problem.

Looking a bit deeper, it appears that the boards are hanging when the
set_phcd() function is called in the tegra phy driver to disable the phy
clock. This function is called by usb_phy_set_suspend() in the chipidea
driver.

Thierry, any thoughts?

Cheers
Jon

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