From: John Stultz <john.stultz@linaro.org> To: lkml <linux-kernel@vger.kernel.org> Cc: John Stultz <john.stultz@linaro.org>, John Youn <johnyoun@synopsys.com>, Vardan Mikayelyan <mvardan@synopsys.com>, Artur Petrosyan <arturp@synopsys.com>, Grigor Tovmasyan <tovmasya@synopsys.com>, Felipe Balbi <felipe.balbi@linux.intel.com>, linux-usb@vger.kernel.org Subject: [PATCH] usb: dwc2: Fix HiKey regression caused by power_down feature Date: Fri, 18 May 2018 17:49:03 -0700 [thread overview] Message-ID: <1526690943-8211-1-git-send-email-john.stultz@linaro.org> (raw) In 4.17-rc, commit 03ea6d6e9e1f ("usb: dwc2: Enable power down") caused the HiKey board to not correctly handle switching between usb-gadget and usb-host mode. Unplugging the OTG port would result in: [ 42.240973] dwc2 f72c0000.usb: dwc2_restore_host_registers: no host registers to restore [ 42.249066] dwc2 f72c0000.usb: dwc2_host_exit_hibernation: failed to restore host registers And the USB-host ports would not function. And plugging in the OTG port, we would see: [ 46.046557] WARNING: CPU: 3 PID: 6 at drivers/usb/dwc2/gadget.c:260 dwc2_hsotg_init_fifo+0x194/0x1a0 [ 46.055761] CPU: 3 PID: 6 Comm: kworker/u16:0 Not tainted 4.17.0-rc5-00030-ge67da8c #231 [ 46.055767] Hardware name: HiKey Development Board (DT) [ 46.055784] Workqueue: dwc2 dwc2_conn_id_status_change ... Thus, this patch sets the hisi params to disable the power_down flag by default, and gets thing working again. Cc: John Youn <johnyoun@synopsys.com> Cc: Vardan Mikayelyan <mvardan@synopsys.com> Cc: Artur Petrosyan <arturp@synopsys.com> Cc: Grigor Tovmasyan <tovmasya@synopsys.com> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: linux-usb@vger.kernel.org Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/usb/dwc2/params.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index f03e418..96b1b25 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -70,6 +70,7 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg) GAHBCFG_HBSTLEN_SHIFT; p->uframe_sched = false; p->change_speed_quirk = true; + p->power_down = false; } static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg) -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: John Stultz <john.stultz@linaro.org> To: lkml <linux-kernel@vger.kernel.org> Cc: John Stultz <john.stultz@linaro.org>, John Youn <johnyoun@synopsys.com>, Vardan Mikayelyan <mvardan@synopsys.com>, Artur Petrosyan <arturp@synopsys.com>, Grigor Tovmasyan <tovmasya@synopsys.com>, Felipe Balbi <felipe.balbi@linux.intel.com>, linux-usb@vger.kernel.org Subject: usb: dwc2: Fix HiKey regression caused by power_down feature Date: Fri, 18 May 2018 17:49:03 -0700 [thread overview] Message-ID: <1526690943-8211-1-git-send-email-john.stultz@linaro.org> (raw) In 4.17-rc, commit 03ea6d6e9e1f ("usb: dwc2: Enable power down") caused the HiKey board to not correctly handle switching between usb-gadget and usb-host mode. Unplugging the OTG port would result in: [ 42.240973] dwc2 f72c0000.usb: dwc2_restore_host_registers: no host registers to restore [ 42.249066] dwc2 f72c0000.usb: dwc2_host_exit_hibernation: failed to restore host registers And the USB-host ports would not function. And plugging in the OTG port, we would see: [ 46.046557] WARNING: CPU: 3 PID: 6 at drivers/usb/dwc2/gadget.c:260 dwc2_hsotg_init_fifo+0x194/0x1a0 [ 46.055761] CPU: 3 PID: 6 Comm: kworker/u16:0 Not tainted 4.17.0-rc5-00030-ge67da8c #231 [ 46.055767] Hardware name: HiKey Development Board (DT) [ 46.055784] Workqueue: dwc2 dwc2_conn_id_status_change ... Thus, this patch sets the hisi params to disable the power_down flag by default, and gets thing working again. Cc: John Youn <johnyoun@synopsys.com> Cc: Vardan Mikayelyan <mvardan@synopsys.com> Cc: Artur Petrosyan <arturp@synopsys.com> Cc: Grigor Tovmasyan <tovmasya@synopsys.com> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: linux-usb@vger.kernel.org Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/usb/dwc2/params.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index f03e418..96b1b25 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -70,6 +70,7 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg) GAHBCFG_HBSTLEN_SHIFT; p->uframe_sched = false; p->change_speed_quirk = true; + p->power_down = false; } static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
next reply other threads:[~2018-05-19 0:49 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-19 0:49 John Stultz [this message] 2018-05-19 0:49 ` usb: dwc2: Fix HiKey regression caused by power_down feature John Stultz 2018-05-21 8:45 ` [PATCH] " Minas Harutyunyan 2018-05-21 8:45 ` Minas Harutyunyan 2018-05-21 19:40 ` [PATCH] " John Stultz 2018-05-21 19:40 ` John Stultz 2018-05-22 14:24 ` [PATCH] " Minas Harutyunyan 2018-05-22 14:24 ` Minas Harutyunyan 2018-05-22 21:57 ` [PATCH] " John Stultz 2018-05-22 21:57 ` John Stultz 2018-09-20 14:17 ` [PATCH] " Artur Petrosyan 2018-09-20 14:17 ` Artur Petrosyan 2018-09-21 1:05 ` [PATCH] " John Stultz 2018-09-21 1:05 ` John Stultz 2018-09-24 5:57 ` [PATCH] " Artur Petrosyan 2018-09-24 5:57 ` Artur Petrosyan 2018-09-24 18:51 ` [PATCH] " John Stultz 2018-09-24 18:51 ` John Stultz 2018-09-25 10:04 ` [PATCH] " Artur Petrosyan 2018-09-25 10:04 ` Artur Petrosyan 2018-09-25 17:59 ` [PATCH] " John Stultz 2018-09-25 17:59 ` John Stultz 2018-09-26 6:02 ` [PATCH] " Artur Petrosyan 2018-09-26 6:02 ` Artur Petrosyan [not found] ` <CALAqxLWOBFO_CjfBFNwbC+qNjtK=TgYrPusb4r5-dThBD5bVnw@mail.gmail.com> 2018-10-01 6:56 ` [PATCH] " Artur Petrosyan 2018-10-01 6:56 ` Artur Petrosyan 2018-09-27 12:33 ` [PATCH] " Artur Petrosyan 2018-09-27 12:33 ` Artur Petrosyan 2018-09-28 18:32 ` [PATCH] " John Stultz 2018-09-28 18:32 ` John Stultz 2018-10-01 7:06 ` [PATCH] " Artur Petrosyan 2018-10-01 7:06 ` Artur Petrosyan
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