From: Peter Chen <hzpeterchen@gmail.com>
To: Stephen Boyd <stephen.boyd@linaro.org>
Cc: linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
Andy Gross <andy.gross@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Neil Armstrong <narmstrong@baylibre.com>,
Arnd Bergmann <arnd@arndb.de>, Felipe Balbi <balbi@kernel.org>,
Peter Chen <peter.chen@nxp.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH 08/21] usb: chipidea: Kick OTG state machine for AVVIS with vbus extcon
Date: Thu, 30 Jun 2016 09:26:52 +0800 [thread overview]
Message-ID: <20160630012652.GB19928@shlinux2> (raw)
In-Reply-To: <146724959973.16253.818114721999543873@sboyd-linaro>
On Wed, Jun 29, 2016 at 06:19:59PM -0700, Stephen Boyd wrote:
> Quoting Peter Chen (2016-06-28 20:09:13)
> > On Sun, Jun 26, 2016 at 12:28:25AM -0700, Stephen Boyd wrote:
> > > Force the OTG state machine to go forward when we're using an
> > > extcon for vbus detection. In this case, the controller may never
> > > raise an interrupt for AVVIS, so we need to simulate the event by
> > > toggling the appropriate OTG fsm bits and kicking the state
> > > machine again.
> > >
> >
> > Well, I think you may misunderstand the OTG FSM and dual-role.
> > From my and Felipe's point, there are seldom users for USB FSM,
> > there are only OTG FSM spec and related OTG certification.
>
> Probably yes.
>
> >
> > The OTG FSM needs related SoC support, the vbus will be off at
> > several states, and the SRP should be supported by SoC.
> >
> > By default, the dts needs below properties for disabling it if you
> > choose otg fsm support at kernel configuration.
> >
> > &usbotg1 {
> > vbus-supply = <®_usb_otg1_vbus>;
> > srp-disable;
> > hnp-disable;
> > adp-disable;
> > status = "okay";
> > };
> >
> > See Documentation/devicetree/bindings/usb/generic.txt.
>
> Does this mean we should be setting all those properties if we're using
> an extcon for vbus and id?
It is not related to how we know vbus and id. If your controller is
otg-capable, and you don't want to enable OTG FSM (just want dual-role),
you should set them at dts since the zImage is multi-platforms, the
CONFIG_USB_OTG and CONFIG_USB_OTG_FSM may be chosen.
> I have noticed that vbus is powered off after
> some time when no device is connected and we're in A_HOST state because
> the timeout for a B device connection happens.
I think it is not you want, but it is OTG compliance.
--
Best Regards,
Peter Chen
next prev parent reply other threads:[~2016-06-30 1:35 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-26 7:28 [PATCH 00/21] Support qcom's HSIC USB and rewrite USB2 HS phy support Stephen Boyd
2016-06-26 7:28 ` [PATCH 01/21] of: device: Support loading a module with OF based modalias Stephen Boyd
2016-06-28 4:17 ` Bjorn Andersson
2016-06-26 7:28 ` [PATCH 02/21] usb: ulpi: Support device discovery via DT Stephen Boyd
2016-06-27 4:21 ` kbuild test robot
2016-06-27 14:34 ` Heikki Krogerus
[not found] ` <146706544012.30684.15569003844798199881@sboyd-linaro>
2016-06-28 11:42 ` Heikki Krogerus
2016-06-29 1:53 ` Peter Chen
2016-06-28 20:56 ` Rob Herring
[not found] ` <146715176149.31418.10938517376423447782@sboyd-linaro>
2016-07-01 0:59 ` Rob Herring
2016-06-26 7:28 ` [PATCH 03/21] usb: ulpi: Avoid reading/writing in device creation with OF devices Stephen Boyd
2016-06-26 7:28 ` [PATCH 04/21] usb: chipidea: Only read/write OTGSC from one place Stephen Boyd
2016-06-27 8:04 ` Jun Li
2016-06-27 19:07 ` Stephen Boyd
2016-06-28 9:36 ` Peter Chen
2016-06-26 7:28 ` [PATCH 05/21] usb: chipidea: Handle extcon events properly Stephen Boyd
2016-06-28 10:01 ` Peter Chen
2016-06-26 7:28 ` [PATCH 06/21] usb: chipidea: Initialize and reinitialize phy later Stephen Boyd
2016-06-29 2:30 ` Peter Chen
[not found] ` <146724983020.16253.12640673678669134952@sboyd-linaro>
2016-06-30 1:22 ` Peter Chen
2016-06-26 7:28 ` [PATCH 07/21] usb: chipidea: Notify of reset when switching into host mode Stephen Boyd
2016-06-26 7:28 ` [PATCH 08/21] usb: chipidea: Kick OTG state machine for AVVIS with vbus extcon Stephen Boyd
2016-06-29 3:09 ` Peter Chen
[not found] ` <146724959973.16253.818114721999543873@sboyd-linaro>
2016-06-30 1:26 ` Peter Chen [this message]
2016-06-30 1:50 ` Jun Li
2016-06-26 7:28 ` [PATCH 09/21] usb: chipidea: Add support for ULPI PHY bus Stephen Boyd
2016-06-29 6:26 ` Peter Chen
2016-06-26 7:28 ` [PATCH 10/21] usb: chipidea: msm: Rely on core to override AHBBURST Stephen Boyd
2016-06-29 6:32 ` Peter Chen
[not found] ` <146722676163.16253.15476996138920236894@sboyd-linaro>
2016-06-30 1:18 ` Peter Chen
2016-06-26 7:28 ` [PATCH 11/21] usb: chipidea: msm: Use hw_write_id_reg() instead of writel directly Stephen Boyd
2016-06-29 6:37 ` Peter Chen
2016-06-26 7:28 ` [PATCH 12/21] usb: chipidea: msm: Keep device runtime enabled Stephen Boyd
2016-06-29 6:46 ` Peter Chen
[not found] ` <146724741028.16253.4741331543289283958@sboyd-linaro>
2016-06-30 1:39 ` Peter Chen
[not found] ` <146731865461.12823.6532384101517870130@sboyd-linaro>
2016-07-01 3:20 ` Peter Chen
2016-06-26 7:28 ` [PATCH 13/21] usb: chipidea: msm: Allow core to get usb phy Stephen Boyd
2016-06-29 6:48 ` Peter Chen
2016-06-29 11:34 ` Peter Chen
[not found] ` <146722867837.16253.5338887948471498730@sboyd-linaro>
2016-06-30 1:43 ` Peter Chen
2016-06-26 7:28 ` [PATCH 14/21] usb: chipidea: msm: Add proper clk and reset support Stephen Boyd
2016-06-29 7:02 ` Peter Chen
2016-06-26 7:28 ` [PATCH 15/21] usb: chipidea: msm: Mux over secondary phy at the right time Stephen Boyd
2016-06-28 4:51 ` Bjorn Andersson
2016-06-29 8:08 ` Peter Chen
[not found] ` <146722853892.16253.6137643683844696922@sboyd-linaro>
2016-06-30 1:52 ` Peter Chen
2016-06-26 7:28 ` [PATCH 16/21] usb: chipidea: msm: Restore wrapper settings after reset Stephen Boyd
2016-06-29 8:26 ` Peter Chen
[not found] ` <146722762509.16253.13062209537472705701@sboyd-linaro>
2016-06-30 8:54 ` Peter Chen
2016-06-30 16:24 ` Stephen Boyd
2016-06-26 7:28 ` [PATCH 17/21] usb: chipidea: msm: Make platform data driver local instead of global Stephen Boyd
2016-06-29 11:29 ` Peter Chen
[not found] ` <146722783258.16253.8246581455698560411@sboyd-linaro>
2016-06-30 9:08 ` Peter Chen
2016-06-26 7:28 ` [PATCH 18/21] usb: chipidea: msm: Add reset controller for PHY POR bit Stephen Boyd
2016-06-27 3:41 ` kbuild test robot
2016-06-27 4:51 ` kbuild test robot
2016-06-27 7:50 ` kbuild test robot
2016-06-29 11:45 ` Peter Chen
2016-06-26 7:28 ` [PATCH 19/21] usb: chipidea: msm: Be silent on probe defer errors Stephen Boyd
2016-06-30 1:06 ` Peter Chen
2016-06-26 7:28 ` [PATCH 20/21] phy: Add support for Qualcomm's USB HSIC phy Stephen Boyd
2016-06-28 8:49 ` Neil Armstrong
2016-06-28 21:58 ` Stephen Boyd
2016-06-29 9:16 ` Neil Armstrong
2016-06-29 18:54 ` Stephen Boyd
2016-06-26 7:28 ` [PATCH 21/21] phy: Add support for Qualcomm's USB HS phy Stephen Boyd
2016-06-28 3:09 ` [PATCH 00/21] Support qcom's HSIC USB and rewrite USB2 HS phy support John Stultz
[not found] ` <146710289677.3879.15364764209076318827@sboyd-linaro>
2016-07-02 6:03 ` John Stultz
[not found] ` <146774653916.32648.3323628902201136171@sboyd-linaro>
2016-07-05 19:33 ` John Stultz
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