From: Rob Herring <robh@kernel.org> To: William Wu <william.wu@rock-chips.com> Cc: balbi@kernel.org, gregkh@linuxfoundation.org, heiko@sntech.de, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, frank.wang@rock-chips.com, huangtao@rock-chips.com, dianders@google.com, briannorris@google.com, groeck@google.com, daniel.meng@rock-chips.com, John.Youn@synopsys.com Subject: Re: [PATCH v3] usb: dwc3: add disable u2mac linestate check quirk Date: Fri, 28 Apr 2017 08:41:20 -0500 [thread overview] Message-ID: <20170428134120.deqjesvinuoskem7@rob-hp-laptop> (raw) In-Reply-To: <1492603898-25070-1-git-send-email-william.wu@rock-chips.com> On Wed, Apr 19, 2017 at 08:11:38PM +0800, William Wu wrote: > This patch adds a quirk to disable USB 2.0 MAC linestate check > during HS transmit. Refer the dwc3 databook, we can use it for > some special platforms if the linestate not reflect the expected > line state(J) during transmission. > > When use this quirk, the controller implements a fixed 40-bit > TxEndDelay after the packet is given on UTMI and ignores the > linestate during the transmit of a token (during token-to-token > and token-to-data IPGAP). > > On some rockchip platforms (e.g. rk3399), it requires to disable > the u2mac linestate check to decrease the SSPLIT token to SETUP > token inter-packet delay from 566ns to 466ns, and fix the issue > that FS/LS devices not recognized if inserted through USB 3.0 HUB. > > Signed-off-by: William Wu <william.wu@rock-chips.com> > --- > Changes in v3: > - change quirk name > - only read and write GUCTL1 if dwc3 version >= 2.50a > > Changes in v2: > - fix coding style > > Documentation/devicetree/bindings/usb/dwc3.txt | 2 ++ Acked-by: Rob Herring <robh@kernel.org> > drivers/usb/dwc3/core.c | 20 ++++++++++++++------ > drivers/usb/dwc3/core.h | 4 ++++ > 3 files changed, 20 insertions(+), 6 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> To: William Wu <william.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org> Cc: balbi-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, frank.wang-TNX95d0MmH7DzftRWevZcw@public.gmane.org, huangtao-TNX95d0MmH7DzftRWevZcw@public.gmane.org, dianders-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, briannorris-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, groeck-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, daniel.meng-TNX95d0MmH7DzftRWevZcw@public.gmane.org, John.Youn-HKixBCOQz3hWk0Htik3J/w@public.gmane.org Subject: Re: [PATCH v3] usb: dwc3: add disable u2mac linestate check quirk Date: Fri, 28 Apr 2017 08:41:20 -0500 [thread overview] Message-ID: <20170428134120.deqjesvinuoskem7@rob-hp-laptop> (raw) In-Reply-To: <1492603898-25070-1-git-send-email-william.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org> On Wed, Apr 19, 2017 at 08:11:38PM +0800, William Wu wrote: > This patch adds a quirk to disable USB 2.0 MAC linestate check > during HS transmit. Refer the dwc3 databook, we can use it for > some special platforms if the linestate not reflect the expected > line state(J) during transmission. > > When use this quirk, the controller implements a fixed 40-bit > TxEndDelay after the packet is given on UTMI and ignores the > linestate during the transmit of a token (during token-to-token > and token-to-data IPGAP). > > On some rockchip platforms (e.g. rk3399), it requires to disable > the u2mac linestate check to decrease the SSPLIT token to SETUP > token inter-packet delay from 566ns to 466ns, and fix the issue > that FS/LS devices not recognized if inserted through USB 3.0 HUB. > > Signed-off-by: William Wu <william.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org> > --- > Changes in v3: > - change quirk name > - only read and write GUCTL1 if dwc3 version >= 2.50a > > Changes in v2: > - fix coding style > > Documentation/devicetree/bindings/usb/dwc3.txt | 2 ++ Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> > drivers/usb/dwc3/core.c | 20 ++++++++++++++------ > drivers/usb/dwc3/core.h | 4 ++++ > 3 files changed, 20 insertions(+), 6 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2017-04-28 13:41 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-19 12:11 [PATCH v3] usb: dwc3: add disable u2mac linestate check quirk William Wu 2017-04-19 12:11 ` William Wu 2017-04-19 19:44 ` Guenter Roeck 2017-04-19 19:44 ` Guenter Roeck 2017-04-28 13:41 ` Rob Herring [this message] 2017-04-28 13:41 ` Rob Herring
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