[PATCH v2 00/15] usb: dwc2: Fix Hibernation issues.

Artur Petrosyan
2021-04-16T12:46:49Z

This patch set fixes and improves hibernation mode for dwc2 core.
It adds support for the following cases
1. Hibernation entering/exiting flow by system suspend/resume.
2. Exiting hibernation mode before removing driver and urb enqueue.
3. Exiting hibernation from gpwrdn rst detect.

It updates the implementation of dwc2 entering and exiting
hibernation mode when a port is suspended or resumed or reset asserted.

It fixes hibernation issues between host and device mode when core
enters to hibernation in host mode and mode change happens. Also, a fix
is introduced for remote wakeup flow.

The patch set also improves implementation of entering to hibernation
from dwc2_handle_usb_suspend_intr() handler.

Changes since V1:
Updated bellow patches. Moved duplicated error checking *if* conditions
from innermost to outside if.
1. usb: dwc2: Add exit hibernation mode before removing drive
2. usb: dwc2: Allow exit hibernation in urb enqueue

Fixed an uninitialized pointer variable which was reported by
kernel test robot in "usb: dwc2: Add exit hibernation mode before
removing drive" patch. After fixing added Reported-by tags for
kernel test robot and Dan Carpenter.

Also removed some text from cover letter because I think that is
why vger.kernel.org was rejecting it.

Artur Petrosyan (15):
usb: dwc2: Update exit hibernation when port reset is asserted
usb: dwc2: Reset DEVADDR after exiting gadget hibernation.
usb: dwc2: Fix host mode hibernation exit with remote wakeup flow.
usb: dwc2: Fix hibernation between host and device modes.
usb: dwc2: Allow exiting hibernation from gpwrdn rst detect
usb: dwc2: Clear fifo_map when resetting core.
usb: dwc2: Clear GINTSTS_RESTOREDONE bit after restore is generated.
usb: dwc2: Move enter hibernation to dwc2_port_suspend() function
usb: dwc2: Move exit hibernation to dwc2_port_resume() function
usb: dwc2: Allow exit hibernation in urb enqueue
usb: dwc2: Add hibernation entering flow by system suspend
usb: dwc2: Add hibernation exiting flow by system resume
usb: dwc2: Add exit hibernation mode before removing drive
usb: dwc2: Update dwc2_handle_usb_suspend_intr function.
usb: dwc2: Get rid of useless error checks in suspend interrupt

drivers/usb/dwc2/core.c | 25 ++++-
drivers/usb/dwc2/core.h | 3 +
drivers/usb/dwc2/core_intr.c | 205 +++++++++++++++++++----------------
drivers/usb/dwc2/gadget.c | 4 +
drivers/usb/dwc2/hcd.c | 92 +++++++++++++---
drivers/usb/dwc2/platform.c | 15 +++
6 files changed, 233 insertions(+), 111 deletions(-)

base-commit: 4b853c236c7b5161a2e444bd8b3c76fe5aa5ddcb
--
2.25.1