[0/2] usb: dwc3: Host wake up support from system suspend

Message ID 1591885683-29514-1-git-send-email-sanm@codeaurora.org
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  • usb: dwc3: Host wake up support from system suspend
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Sandeep Maheswaram June 11, 2020, 2:28 p.m.
Avoiding phy powerdown in host mode so that it can be wake up by devices.
Set usb controller wakeup capable when wakeup capable devices are
connected to the host.

Added GENPD_FLAG_ACTIVE_WAKEUP flag to keep usb30_prim gdsc active
when  wakeup capable devices are connected to the host.

Sandeep Maheswaram (1):
  usb: dwc3: Host wake up support from system suspend

Taniya Das (1):
  clk: qcom: gcc: Add genpd active wakeup flag for sc7180

 drivers/clk/qcom/gcc-sc7180.c |  1 +
 drivers/usb/dwc3/core.c       | 47 +++++++++++++++++++++++++-----
 drivers/usb/dwc3/core.h       |  1 +
 drivers/usb/dwc3/dwc3-qcom.c  | 66 ++++++++++++++++++++++++++++++++-----------
 4 files changed, 92 insertions(+), 23 deletions(-)

Comments

Stephen Boyd Aug. 7, 2020, 9:44 p.m. | #1
Quoting Stephen Boyd (2020-06-11 15:46:58)
> Quoting Sandeep Maheswaram (2020-06-11 07:28:02)

> > From: Taniya Das <tdas@codeaurora.org>

> > 

> > The USB client requires the usb30_prim gdsc to be kept active for

> > certain use cases, thus add the GENPD_FLAG_ACTIVE_WAKEUP flag.

> 

> Can you please describe more of what this is for? Once sentence doesn't

> tell me much at all. I guess that sometimes we want to wakeup from USB

> and so the usb gdsc should be marked as "maybe keep on for wakeups" with

> the GENPD_FLAG_ACTIVE_WAKEUP flag if the USB controller is wakeup

> enabled?

> 

> > 

> > Signed-off-by: Taniya Das <tdas@codeaurora.org>

> > ---

> 

> Add a Fixes: tag too? And I assume we need to do this for all USB gdscs

> on various SoCs and maybe other GDSCs like PCIe. Any plans to fix those

> GDSCs?

> 


Any update here?
Sandeep Maheswaram Aug. 11, 2020, 8:07 p.m. | #2
Hi,

On 8/8/2020 3:14 AM, Stephen Boyd wrote:
> Quoting Stephen Boyd (2020-06-11 15:46:58)

>> Quoting Sandeep Maheswaram (2020-06-11 07:28:02)

>>> From: Taniya Das <tdas@codeaurora.org>

>>>

>>> The USB client requires the usb30_prim gdsc to be kept active for

>>> certain use cases, thus add the GENPD_FLAG_ACTIVE_WAKEUP flag.

>> Can you please describe more of what this is for? Once sentence doesn't

>> tell me much at all. I guess that sometimes we want to wakeup from USB

>> and so the usb gdsc should be marked as "maybe keep on for wakeups" with

>> the GENPD_FLAG_ACTIVE_WAKEUP flag if the USB controller is wakeup

>> enabled?

>>

>>> Signed-off-by: Taniya Das <tdas@codeaurora.org>

>>> ---

>> Add a Fixes: tag too? And I assume we need to do this for all USB gdscs

>> on various SoCs and maybe other GDSCs like PCIe. Any plans to fix those

>> GDSCs?

>>

> Any update here?


I moved this change to usb driver code dwc3-qcom.c in v2 of this series https://patchwork.kernel.org/cover/11652281/
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