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11f9c06cc3
The dwc3 gadget call pm_runtime_get in the __dwc3_gadget_ep_queue() to increment the device's usage count, and call pm_runtime_put in the dwc3_gadget_giveback() to decrement the device's usage count if the request is completed successfully or disconnection happens. Test on RK3399 IND Type-C interface with HUSB311 (Type-C port controller chip), if plug out the USB cable, the extcon notifier from tcpm framework comes earlier than the dwc3 disconnect event. This cause the dwc3 fails to enter the runtime suspend immediately in the disconnection process of __dwc3_set_mode(). This patch waits for the dwc3 disconnect event done before doing pm_runtime_put_sync_suspend. If it takes 1000ms to wait for the disconnect event timeout, just print warning log and still do the pm_runtime_put_sync_suspend, and then the dwc3 can also enter runtime suspend automatically (DWC3_DEFAULT_AUTOSUSPEND_DELAY is 5000ms) after the disconnect event done. Signed-off-by: William Wu <william.wu@rock-chips.com> Change-Id: Ie6086d469b5d24f841532992e4e95f0c91c37022
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.