[PATCH v8 0/6] USB DWC3 host wake up support from system suspend

From: Sandeep Maheswaram <sanm@codeaurora.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Felipe Balbi <balbi@kernel.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Doug Anderson <dianders@chromium.org>,
	Matthias Kaehlcke <mka@chromium.org>,
	Mathias Nyman <mathias.nyman@intel.com>
Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Pratham Pratap <prathampratap@codeaurora.org>,
	Sandeep Maheswaram <sanm@codeaurora.org>
Subject: [PATCH v8 0/6] USB DWC3 host wake up support from system suspend
Date: Mon, 28 Jun 2021 17:38:11 +0530	[thread overview]
Message-ID: <1624882097-23265-1-git-send-email-sanm@codeaurora.org> (raw)

Avoiding phy powerdown in host mode when wakeup capable devices are 
connected, so that it can be wake up by devices.
Set GENPD_FLAG_ACTIVE_WAKEUP flag to keep usb30_prim gdsc active
when wakeup capable devices are connected to the host.

Changes in v8:
Moved the dwc3 suspend quirk code in dwc3/host.c to xhci-plat.c
Checking phy_power_off flag instead of usb_wakeup_enabled_descendants 
to keep gdsc active.

Changes in v7:
Change in commit text and message in PATCH 1/5 and PATCH 5/5
as per Matthias suggestion.
Added curly braces for if and else if sections in PATCH 4/5.

Changes in v6:
Addressed comments in host.c and core.c
Separated the patches in dwc3-qcom.c to make it simple.
Dropped wakeup-source change as it is not related to this series.

Changes in v5:
Added phy_power_off flag to check presence of wakeup capable devices.
Dropped patch[v4,4/5] as it is present linux-next.
Addressed comments in host.c and dwc3-qcom.c.

Changes in v4:
Addressed Matthias comments raised in v3.

Changes in v3:
Removed need_phy_for_wakeup flag and by default avoiding phy powerdown.
Addressed Matthias comments and added entry for DEV_SUPERSPEED.
Added suspend_quirk in dwc3 host and moved the dwc3_set_phy_speed_flags.
Added wakeup-source dt entry and reading in dwc-qcom.c glue driver.

Changes in v2:
Dropped the patch in clock to set GENPD_FLAG_ACTIVE_WAKEUP flag and 
setting in usb dwc3 driver.
Separated the core patch and glue driver patch.
Made need_phy_for_wakeup flag part of dwc structure and 
hs_phy_flags as unsgined int.
Adrressed the comment on device_init_wakeup call.
Corrected offset for reading portsc register.
Added pacth to support wakeup in xo shutdown case.

Sandeep Maheswaram (6):
  usb: dwc3: core: Add HS phy mode variable and phy poweroff flag
  usb: host: xhci: plat: Add suspend quirk for dwc3 controller
  usb: dwc3: core: Host wake up support from system suspend
  usb: dwc3: qcom: Add helper functions to enable,disable wake irqs
  usb: dwc3: qcom: Configure wakeup interrupts during suspend
  usb: dwc3: qcom: Keep power domain on to support wakeup

 drivers/usb/dwc3/core.c      |  7 ++--
 drivers/usb/dwc3/core.h      |  3 ++
 drivers/usb/dwc3/dwc3-qcom.c | 81 ++++++++++++++++++++++++++++----------------
 drivers/usb/host/xhci-plat.c | 38 +++++++++++++++++++++
 4 files changed, 97 insertions(+), 32 deletions(-)

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