From: Felipe Balbi <balbi@kernel.org>
To: Sandeep Maheswaram <sanm@codeaurora.org>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Stephen Boyd <swboyd@chromium.org>,
Doug Anderson <dianders@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>
Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org,
Manu Gautam <mgautam@codeaurora.org>,
Sandeep Maheswaram <sanm@codeaurora.org>
Subject: Re: [PATCH v7 5/5] usb: dwc3: qcom: Keep power domain on to support wakeup
Date: Wed, 28 Apr 2021 13:04:43 +0300 [thread overview]
Message-ID: <87lf92k9ms.fsf@kernel.org> (raw)
In-Reply-To: <1619586716-8687-6-git-send-email-sanm@codeaurora.org>
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Hi,
Sandeep Maheswaram <sanm@codeaurora.org> writes:
> If wakeup capable devices are connected to the controller (directly
> or through hubs) at suspend time keep the power domain on in order
> to support wakeup from these devices.
>
> Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
> ---
> drivers/usb/dwc3/dwc3-qcom.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index 82125bc..1e220af 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -17,9 +17,11 @@
> #include <linux/of_platform.h>
> #include <linux/platform_device.h>
> #include <linux/phy/phy.h>
> +#include <linux/pm_domain.h>
> #include <linux/usb/of.h>
> #include <linux/reset.h>
> #include <linux/iopoll.h>
> +#include <linux/usb/hcd.h>
>
> #include "core.h"
>
> @@ -354,10 +356,19 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
> {
> u32 val;
> int i, ret;
> + struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
> + struct usb_hcd *hcd;
> + struct generic_pm_domain *genpd = pd_to_genpd(qcom->dev->pm_domain);
>
> if (qcom->is_suspended)
> return 0;
>
> + if (dwc->xhci) {
> + hcd = platform_get_drvdata(dwc->xhci);
> + if (usb_wakeup_enabled_descendants(hcd->self.root_hub))
> + genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
> + }
wow, you really need to find a way to do these things generically
instead of bypassing a bunch of layers and access stuff $this doesn't
directly own.
I'm gonna say 'no' to this, sorry. It looks like xhci should, directly,
learn about much of this instead of hiding it 3-layers deep into the
dwc3 glue layer for your specific SoC.
--
balbi
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next prev parent reply other threads:[~2021-04-28 10:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-28 5:11 [PATCH v7 0/5] USB DWC3 host wake up support from system suspend Sandeep Maheswaram
2021-04-28 5:11 ` [PATCH v7 1/5] usb: dwc3: host: Set PHY mode during suspend Sandeep Maheswaram
2021-04-28 9:55 ` Felipe Balbi
[not found] ` <fd927828-a414-cd42-1e4a-b9e9b0744a3a@codeaurora.org>
2021-05-03 11:16 ` Felipe Balbi
2021-05-12 19:12 ` Matthias Kaehlcke
2021-05-13 13:46 ` Felipe Balbi
2021-05-13 14:37 ` Matthias Kaehlcke
2021-04-28 5:11 ` [PATCH v7 2/5] usb: dwc3: core: Host wake up support from system suspend Sandeep Maheswaram
2021-04-28 9:59 ` Felipe Balbi
2021-05-03 4:33 ` Sandeep Maheswaram
2021-05-03 11:20 ` Felipe Balbi
2021-05-12 21:47 ` Matthias Kaehlcke
2021-05-26 4:29 ` Sandeep Maheswaram
2021-04-28 5:11 ` [PATCH v7 3/5] usb: dwc3: qcom: Add helper functions to enable,disable wake irqs Sandeep Maheswaram
2021-04-28 5:11 ` [PATCH v7 4/5] usb: dwc3: qcom: Configure wakeup interrupts during suspend Sandeep Maheswaram
2021-04-28 10:02 ` Felipe Balbi
2021-04-28 5:11 ` [PATCH v7 5/5] usb: dwc3: qcom: Keep power domain on to support wakeup Sandeep Maheswaram
2021-04-28 10:04 ` Felipe Balbi [this message]
2021-05-13 0:23 ` Matthias Kaehlcke
2021-05-13 13:49 ` Felipe Balbi
2021-05-13 14:34 ` Matthias Kaehlcke
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