From: Julius Werner <jwerner@chromium.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Julius Werner <jwerner@chromium.org>, Felipe Balbi <balbi@ti.com>,
Douglas Anderson <dianders@chromium.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
John Youn <johnyoun@synopsys.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
Chris Zhong <zyw@rock-chips.com>,
Heiko Stuebner <heiko@sntech.de>,
Andrew Bresticker <abrestic@chromium.org>,
Alexandru Stan <amstan@chromium.org>, lyz <lyz@rock-chips.com>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [REPOST PATCH 3/3] USB: dwc2: Don't turn off the usbphy in suspend if wakeup is enabled
Date: Wed, 8 Jul 2015 12:41:51 -0700 [thread overview]
Message-ID: <CAODwPW9-5abTDGwLyNRZ0hvn4+6T8ix55TqFhSy_xZx1VVuVNA@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1507081055050.2243-100000@iolanthe.rowland.org>
> But I don't see how you will make it work when the root hub itself is
> not enabled for wakeup and a non-hub device plugged into one of the
> root hub's ports is enabled.
>
> It seems like you would need a usb_hcd_wakeup_not_needed(hcd, port)
> subroutine.
We'd just put that in the Tegra platform driver, I guess. Iterate over
all ports, call usb_wakeup_enabled_descendants() on the connected
device (if any) and disable that port's PHY if it returns 0 or wasn't
connected. Since usb_wakeup_enabled_descendants() also counts
do_remote_wakeup from the device itself and is safe to call even on
non-hubs, that should work for all cases.
WARNING: multiple messages have this Message-ID (diff)
From: Julius Werner <jwerner-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
To: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
Cc: Julius Werner <jwerner-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>,
Douglas Anderson
<dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
John Youn <johnyoun-HKixBCOQz3hWk0Htik3J/w@public.gmane.org>,
"linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Chris Zhong <zyw-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
Andrew Bresticker
<abrestic-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Alexandru Stan <amstan-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
lyz <lyz-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [REPOST PATCH 3/3] USB: dwc2: Don't turn off the usbphy in suspend if wakeup is enabled
Date: Wed, 8 Jul 2015 12:41:51 -0700 [thread overview]
Message-ID: <CAODwPW9-5abTDGwLyNRZ0hvn4+6T8ix55TqFhSy_xZx1VVuVNA@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1507081055050.2243-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
> But I don't see how you will make it work when the root hub itself is
> not enabled for wakeup and a non-hub device plugged into one of the
> root hub's ports is enabled.
>
> It seems like you would need a usb_hcd_wakeup_not_needed(hcd, port)
> subroutine.
We'd just put that in the Tegra platform driver, I guess. Iterate over
all ports, call usb_wakeup_enabled_descendants() on the connected
device (if any) and disable that port's PHY if it returns 0 or wasn't
connected. Since usb_wakeup_enabled_descendants() also counts
do_remote_wakeup from the device itself and is safe to call even on
non-hubs, that should work for all cases.
--
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next prev parent reply other threads:[~2015-07-08 19:42 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 18:27 [REPOST PATCH 0/3] dwc2 patches to allow wakeup on Rockchip rk3288 Douglas Anderson
2015-07-06 18:27 ` Douglas Anderson
2015-07-06 18:27 ` [REPOST PATCH 1/3] USB: Export usb_wakeup_enabled_descendants() Douglas Anderson
2015-07-06 18:27 ` Douglas Anderson
2015-07-06 18:27 ` [REPOST PATCH 2/3] Documentation: dt-bindings: Add snps,need-phy-for-wake for dwc2 USB Douglas Anderson
2015-07-06 18:27 ` Douglas Anderson
2015-07-06 18:27 ` [REPOST PATCH 3/3] USB: dwc2: Don't turn off the usbphy in suspend if wakeup is enabled Douglas Anderson
2015-07-06 18:27 ` Douglas Anderson
2015-07-06 18:34 ` Felipe Balbi
2015-07-06 18:34 ` Felipe Balbi
2015-07-06 19:32 ` Doug Anderson
2015-07-06 19:32 ` Doug Anderson
2015-07-06 19:35 ` Felipe Balbi
2015-07-06 19:35 ` Felipe Balbi
2015-07-06 18:58 ` Alan Stern
2015-07-06 18:58 ` Alan Stern
2015-07-06 19:02 ` Felipe Balbi
2015-07-06 19:02 ` Felipe Balbi
2015-07-06 19:39 ` Doug Anderson
2015-07-06 19:39 ` Doug Anderson
2015-07-07 14:28 ` Alan Stern
2015-07-07 14:28 ` Alan Stern
2015-07-08 0:06 ` Julius Werner
2015-07-08 0:06 ` Julius Werner
2015-07-08 15:01 ` Alan Stern
2015-07-08 19:41 ` Julius Werner [this message]
2015-07-08 19:41 ` Julius Werner
2015-07-08 19:58 ` Alan Stern
2015-07-08 19:58 ` Alan Stern
2015-10-21 16:23 ` [REPOST PATCH 0/3] dwc2 patches to allow wakeup on Rockchip rk3288 Doug Anderson
2015-10-21 16:23 ` Doug Anderson
2015-10-27 2:05 ` John Youn
2015-10-27 2:05 ` John Youn
2015-10-31 0:01 ` Doug Anderson
2015-10-31 0:01 ` Doug Anderson
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