From: Chunfeng Yun <chunfeng.yun@mediatek.com> To: Alan Cooper <alcooperx@gmail.com> Cc: ": Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>, Alan Stern <stern@rowland.harvard.edu>, Alban Bedel <albeu@free.fr>, Alex Elder <elder@linaro.org>, Andrew Morton <akpm@linux-foundation.org>, "Arnd Bergmann" <arnd@arndb.de>, Avi Fishman <avifishman70@gmail.com>, <bcm-kernel-feedback-list@broadcom.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, "David S. Miller" <davem@davemloft.net>, DTML <devicetree@vger.kernel.org>, Dmitry Osipenko <digetx@gmail.com>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Hans de Goede <hdegoede@redhat.com>, James Hogan <jhogan@kernel.org>, Jianguo Sun <sunjianguo1@huawei.com>, Johan Hovold <johan@kernel.org>, Kees Cook <keescook@chromium.org>, USB list <linux-usb@vger.kernel.org>, Lu Baolu <baolu.lu@linux.intel.com>, "Mark Rutland" <mark.rutland@arm.com>, Martin Blumenstingl <martin.blumenstingl@googlemail.com>, Mathias Nyman <mathias.nyman@intel.com>, Mathias Nyman <mathias.nyman@linux.intel.com>, Mauro Carvalho Chehab <mchehab+samsung@kernel.org>, Rishabh Bhatnagar <rishabhb@codeaurora.org>, Rob Herring <robh+dt@kernel.org>, Roger Quadros <rogerq@ti.com> Subject: Re: [PATCH V2 2/6] usb: core: Add ability to skip phy exit on suspend and init on resume Date: Thu, 8 Nov 2018 09:43:52 +0800 [thread overview] Message-ID: <1541641432.32173.71.camel@mhfsdcap03> (raw) In-Reply-To: <CAOGqxeWBmAahswHp+b_PzkyGs-9sOx3COpJnFVsbKhx14KLuUw@mail.gmail.com> hi, On Tue, 2018-10-30 at 18:30 -0400, Alan Cooper wrote: > On 10/17/18 9:46 PM, Chunfeng Yun wrote:> hi, > > > > On Wed, 2018-10-17 at 18:29 -0400, Al Cooper wrote: > >> Add the ability to skip calling the PHY's exit routine on suspend > >> and the PHY's init routine on resume. This is to handle a USB PHY > >> that should have it's power_off function called on suspend but > cannot > >> have it's exit function called because on exit it will disable the > >> PHY to the point where register accesses to the Host Controllers > >> using the PHY will be disabled and the host drivers will crash. > >> > >> This is enabled with the HCD flag "suspend_without_phy_exit" which > >> can be set from any HCD driver. > >> > >> Signed-off-by: Al Cooper<alcooperx@gmail.com> > >> --- > >> drivers/usb/core/hcd.c | 8 ++++---- > >> drivers/usb/core/phy.c | 18 ++++++++++++------ > >> drivers/usb/core/phy.h | 9 ++++++--- > >> include/linux/usb/hcd.h | 3 +++ > >> 4 files changed, 25 insertions(+), 13 deletions(-) > >> > >> unsigned skip_phy_initialization:1; > >> > >> + /* Some phys don't want the phy's exit/init called on > suspend/resume */ > >> + unsigned suspend_without_phy_exit:1; > > As suggested before, you can skip phy's exit/init during > suspend/resume > > by enabling wakeup of hcd, so needn't add a new variable for it. > > I still need to be able to enable and disable wakeup for this driver. Just use device_init_wakeup(dev, true) instead of device_wakeup_enable(dev) for your controller driver, you can try it. Sorry for the late replay > > > > >> + > >> /* The next flag is a stopgap, to be removed when all the > HCDs > >> * support the new root-hub polling mechanism. */ > >> unsigned uses_new_polling:1; > >
WARNING: multiple messages have this Message-ID (diff)
From: Chunfeng Yun <chunfeng.yun@mediatek.com> To: Alan Cooper <alcooperx@gmail.com> Cc: ": Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>, Alan Stern <stern@rowland.harvard.edu>, Alban Bedel <albeu@free.fr>, Alex Elder <elder@linaro.org>, Andrew Morton <akpm@linux-foundation.org>, Arnd Bergmann <arnd@arndb.de>, Avi Fishman <avifishman70@gmail.com>, bcm-kernel-feedback-list@broadcom.com, Bjorn Andersson <bjorn.andersson@linaro.org>, "David S. Miller" <davem@davemloft.net>, DTML <devicetree@vger.kernel.org>, Dmitry Osipenko <digetx@gmail.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Hans de Goede <hdegoede@redhat.com>, James Hogan <jhogan@kernel.org>, Jianguo Sun <sunjianguo1@huawei.com>, Johan Hovold <johan@kernel.org>, Kees Cook <keescook@chromium.org>, US Subject: Re: [PATCH V2 2/6] usb: core: Add ability to skip phy exit on suspend and init on resume Date: Thu, 8 Nov 2018 09:43:52 +0800 [thread overview] Message-ID: <1541641432.32173.71.camel@mhfsdcap03> (raw) In-Reply-To: <CAOGqxeWBmAahswHp+b_PzkyGs-9sOx3COpJnFVsbKhx14KLuUw@mail.gmail.com> hi, On Tue, 2018-10-30 at 18:30 -0400, Alan Cooper wrote: > On 10/17/18 9:46 PM, Chunfeng Yun wrote:> hi, > > > > On Wed, 2018-10-17 at 18:29 -0400, Al Cooper wrote: > >> Add the ability to skip calling the PHY's exit routine on suspend > >> and the PHY's init routine on resume. This is to handle a USB PHY > >> that should have it's power_off function called on suspend but > cannot > >> have it's exit function called because on exit it will disable the > >> PHY to the point where register accesses to the Host Controllers > >> using the PHY will be disabled and the host drivers will crash. > >> > >> This is enabled with the HCD flag "suspend_without_phy_exit" which > >> can be set from any HCD driver. > >> > >> Signed-off-by: Al Cooper<alcooperx@gmail.com> > >> --- > >> drivers/usb/core/hcd.c | 8 ++++---- > >> drivers/usb/core/phy.c | 18 ++++++++++++------ > >> drivers/usb/core/phy.h | 9 ++++++--- > >> include/linux/usb/hcd.h | 3 +++ > >> 4 files changed, 25 insertions(+), 13 deletions(-) > >> > >> unsigned skip_phy_initialization:1; > >> > >> + /* Some phys don't want the phy's exit/init called on > suspend/resume */ > >> + unsigned suspend_without_phy_exit:1; > > As suggested before, you can skip phy's exit/init during > suspend/resume > > by enabling wakeup of hcd, so needn't add a new variable for it. > > I still need to be able to enable and disable wakeup for this driver. Just use device_init_wakeup(dev, true) instead of device_wakeup_enable(dev) for your controller driver, you can try it. Sorry for the late replay > > > > >> + > >> /* The next flag is a stopgap, to be removed when all the > HCDs > >> * support the new root-hub polling mechanism. */ > >> unsigned uses_new_polling:1; > >
next prev parent reply other threads:[~2018-11-08 1:44 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-30 22:30 [PATCH V2 2/6] usb: core: Add ability to skip phy exit on suspend and init on resume Alan Cooper 2018-11-08 1:43 ` Chunfeng Yun [this message] 2018-11-08 1:43 ` Chunfeng Yun 2018-11-08 22:50 ` Alan Cooper 2018-11-08 22:50 ` Alan Cooper 2018-11-09 8:08 ` Chunfeng Yun 2018-11-09 8:08 ` Chunfeng Yun 2018-11-09 12:14 ` Alan Cooper 2018-11-09 12:14 ` Alan Cooper -- strict thread matches above, loose matches on Subject: below -- 2018-10-17 22:29 [PATCH V2 0/6] Add XHCI, EHCI and OHCI support for Broadcom STB SoS's Al Cooper 2018-10-17 22:29 ` [PATCH V2 2/6] usb: core: Add ability to skip phy exit on suspend and init on resume Al Cooper 2018-10-17 22:29 ` Al Cooper 2018-10-18 1:46 ` Chunfeng Yun 2018-10-18 1:46 ` Chunfeng Yun
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