From: Felipe Balbi <balbi@ti.com>
To: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
Cc: "balbi@ti.com" <balbi@ti.com>, Huang Rui <ray.huang@amd.com>,
Alan Stern <stern@rowland.harvard.edu>,
Bjorn Helgaas <bhelgaas@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Vincent Wan <vincent.wan@amd.com>, Tony Li <tony.li@amd.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 16/16] usb: dwc3: enable usb suspend phy
Date: Fri, 17 Oct 2014 13:48:19 -0500 [thread overview]
Message-ID: <20141017184819.GX26260@saruman> (raw)
In-Reply-To: <A2CA0424C0A6F04399FB9E1CD98E0304844E3423@US01WEMBX2.internal.synopsys.com>
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Hi,
On Fri, Oct 17, 2014 at 06:41:04PM +0000, Paul Zimmerman wrote:
> > From: Felipe Balbi [mailto:balbi@ti.com]
> > Sent: Friday, October 17, 2014 8:00 AM
> >
> > On Fri, Oct 17, 2014 at 04:53:41PM +0800, Huang Rui wrote:
> > > AMD NL needs to suspend usb3 ss phy, but this doesn't enable on simulation
> > > board.
> > >
> > > Signed-off-by: Huang Rui <ray.huang@amd.com>
> > > ---
> > > drivers/usb/dwc3/core.c | 7 ++++++-
> > > drivers/usb/dwc3/dwc3-pci.c | 3 ++-
> > > drivers/usb/dwc3/platform_data.h | 1 +
> > > 3 files changed, 9 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> > > index 3ccfe41..4a98696 100644
> > > --- a/drivers/usb/dwc3/core.c
> > > +++ b/drivers/usb/dwc3/core.c
> > > @@ -395,6 +395,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
> > > if (dwc->quirks & DWC3_QUIRK_TX_DEEPH)
> > > reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(1);
> > >
> > > + if (dwc->quirks & DWC3_QUIRK_SUSPHY)
> >
> > should be:
> >
> > if (!dwc->suspend_usb3_phy_quirk)
> >
> > > + reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> >
> > IIRC, databook asks us to set that bit anyway, so the quirk is disabling
> > that bit. Am I missing something ? Paul ?
>
> It looks to me that Huang's patch is enabling that bit, not disabling
> it.
right, but that's what's actually quirky right ? IIRC, Databook asks us
to set usb2 and usb3 suspend phy bits and we're just not doing it.
> Currently the driver does not set either DWC3_GUSB3PIPECTL_SUSPHY or
> DWC3_GUSB2PHYCFG_SUSPHY (unless it has been added by that big patch
> series you just posted). According to the databook, both of those
> bits should be set to 1 after the core initialization has completed.
there you go. So unless that quirk bit flag is set, we're safe of
setting SUSPHY bit for everybody.
> So I think the driver should be changed to enable both of those by
> default, and then maybe you want quirks to disable them if there is
> some platform out there which needs that.
Yeah, that's what I thought too :-) Thanks for confirming
--
balbi
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next prev parent reply other threads:[~2014-10-17 18:48 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 8:53 [PATCH v2 00/16] usb: dwc3: add support for AMD NL SoC Huang Rui
2014-10-17 8:53 ` [PATCH v2 01/16] usb: dwc3: add AMD NL support Huang Rui
2014-10-17 15:00 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 02/16] pci: quirks: add quirk to avoid AMD NL to bind with xhci Huang Rui
2014-10-24 16:35 ` Bjorn Helgaas
2014-10-27 2:55 ` Huang Rui
2014-10-27 13:21 ` Bjorn Helgaas
2014-10-17 8:53 ` [PATCH v2 03/16] usb: dwc3: enable hibernation if to be supported Huang Rui
2014-10-17 8:53 ` [PATCH v2 04/16] usb: dwc3: add a flag to check if it is fpga board Huang Rui
2014-10-17 8:53 ` [PATCH v2 05/16] usb: dwc3: add quirks support to be compatible for kinds of SoCs Huang Rui
2014-10-17 14:41 ` Felipe Balbi
2014-10-20 6:02 ` Huang Rui
2014-10-24 15:25 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 06/16] usb: dwc3: add disscramble quirk Huang Rui
2014-10-17 14:45 ` Felipe Balbi
2014-10-20 6:38 ` Huang Rui
2014-10-24 15:26 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 07/16] usb: dwc3: add lpm erratum support Huang Rui
2014-10-17 14:48 ` Felipe Balbi
2014-10-24 17:01 ` Huang Rui
2014-10-24 17:35 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 08/16] usb: dwc3: add u2exit lfps quirk Huang Rui
2014-10-17 14:50 ` Felipe Balbi
2014-10-20 6:43 ` Huang Rui
2014-10-24 15:27 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 09/16] usb: dwc3: add P3 in U2 SS inactive quirk Huang Rui
2014-10-17 14:52 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 10/16] usb: dwc3: add request p1p2p3 quirk Huang Rui
2014-10-17 14:53 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 11/16] usb: dwc3: add delay " Huang Rui
2014-10-17 14:54 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 12/16] usb: dwc3: add delay phy power change quirk Huang Rui
2014-10-17 14:56 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 13/16] usb: dwc3: add lfps filter quirk Huang Rui
2014-10-17 14:56 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 14/16] usb: dwc3: enable rx_detect to polling lfps quirk Huang Rui
2014-10-17 14:57 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 15/16] usb: dwc3: add tx demphasis quirk Huang Rui
2014-10-17 14:57 ` Felipe Balbi
2014-10-17 8:53 ` [PATCH v2 16/16] usb: dwc3: enable usb suspend phy Huang Rui
2014-10-17 14:59 ` Felipe Balbi
2014-10-17 18:41 ` Paul Zimmerman
2014-10-17 18:48 ` Felipe Balbi [this message]
2014-10-20 8:41 ` Huang Rui
2014-10-20 9:01 ` Huang Rui
2014-10-20 18:17 ` Paul Zimmerman
2014-10-24 15:29 ` Felipe Balbi
2014-10-24 15:28 ` Felipe Balbi
2014-10-17 15:10 ` [PATCH v2 00/16] usb: dwc3: add support for AMD NL SoC Felipe Balbi
2014-10-20 15:38 ` Huang Rui
2014-10-24 15:30 ` Felipe Balbi
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