From: Felipe Balbi <balbi@kernel.org>
To: Thinh Nguyen <Thinh.Nguyen@synopsys.com>, Jun Li <jun.li@nxp.com>,
Jun Li <lijun.kernel@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>,
lkml <linux-kernel@vger.kernel.org>,
Yu Chen <chenyu56@huawei.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
ShuFan Lee <shufan_lee@richtek.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Hans de Goede <hdegoede@redhat.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Valentin Schneider <valentin.schneider@arm.com>,
Jack Pham <jackp@codeaurora.org>,
Linux USB List <linux-usb@vger.kernel.org>,
"open list\:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, Peter Chen <peter.chen@nxp.com>,
Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Subject: Re: [PATCH v4 3/9] usb: dwc3: Increase timeout for CmdAct cleared by device controller
Date: Sat, 16 May 2020 10:12:39 +0300 [thread overview]
Message-ID: <87ftc0xsig.fsf@kernel.org> (raw)
In-Reply-To: <3d757998-56f2-6fff-a724-f713867ae785@synopsys.com>
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Hi,
Thinh Nguyen <Thinh.Nguyen@synopsys.com> writes:
> Jun Li wrote:
>>> -----Original Message-----
>>> From: Felipe Balbi <balbif@gmail.com> On Behalf Of Felipe Balbi
>>> Sent: 2020年5月15日 17:31
>>> To: Jun Li <lijun.kernel@gmail.com>
>>> Cc: John Stultz <john.stultz@linaro.org>; lkml <linux-kernel@vger.kernel.org>; Yu
>>> Chen <chenyu56@huawei.com>; Greg Kroah-Hartman <gregkh@linuxfoundation.org>; Rob
>>> Herring <robh+dt@kernel.org>; Mark Rutland <mark.rutland@arm.com>; ShuFan Lee
>>> <shufan_lee@richtek.com>; Heikki Krogerus <heikki.krogerus@linux.intel.com>;
>>> Suzuki K Poulose <suzuki.poulose@arm.com>; Chunfeng Yun
>>> <chunfeng.yun@mediatek.com>; Hans de Goede <hdegoede@redhat.com>; Andy Shevchenko
>>> <andy.shevchenko@gmail.com>; Valentin Schneider <valentin.schneider@arm.com>;
>>> Jack Pham <jackp@codeaurora.org>; Linux USB List <linux-usb@vger.kernel.org>; open
>>> list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@vger.kernel.org>;
>>> Peter Chen <peter.chen@nxp.com>; Jun Li <jun.li@nxp.com>; Thinh Nguyen
>>> <Thinh.Nguyen@synopsys.com>
>>> Subject: Re: [PATCH v4 3/9] usb: dwc3: Increase timeout for CmdAct cleared by device
>>> controller
>>>
>>>
>>> Hi,
>>>
>>> Jun Li <lijun.kernel@gmail.com> writes:
>>>>> @@ -397,12 +407,18 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned
>>> cmd,
>>>>> dwc3_gadget_ep_get_transfer_index(dep);
>>>>> }
>>>>>
>>>>> - if (saved_config) {
>>>>> + if (saved_hs_config) {
>>>>> reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>>>>> - reg |= saved_config;
>>>>> + reg |= saved_hs_config;
>>>>> dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>>>>> }
>>>>>
>>>>> + if (saved_ss_config) {
>>>>> + reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
>>>>> + reg |= saved_ss_config;
>>>>> + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
>>>>> + }
>>>>> +
>>>>> return ret;
>>>>> }
>>>> Unfortunately this way can't work, once the SS PHY enters P3, disable
>>>> suspend_en can't force SS PHY exit P3, unless do this at the very
>>>> beginning to prevent SS PHY entering P3(e.g. add "snps,dis_u3_susphy_quirk" for
>>> test).
>>>
>>> It sounds like you have a quirky PHY.
>> From what I got from the IC design, the behavior of DWC3_GUSB3PIPECTL_SUSPHY
>> bit should be as what I said, not a quirky.
>>
>> Hi Thinh, could you comment this?
>
> You only need to wake up the usb2 phy when issuing the command while
> running in highspeed or below. If you're running in SS or higher,
> internally the controller does it for you for usb3 phy. In Jun's case,
> it seems like it takes longer for his phy to wake up.
>
> IMO, in this case, I think it's fine to increase the command timeout.
Is there an upper limit to this? Is 32k clock the slowest that can be
fed to the PHY as a suspend clock?
--
balbi
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next prev parent reply other threads:[~2020-05-16 7:12 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 21:59 [PATCH v4 0/9] Prereqs for HiKey960 USB support John Stultz
2019-10-28 21:59 ` [PATCH v4 1/9] dt-bindings: usb: rt1711h: Add connector bindings John Stultz
2019-10-28 21:59 ` [PATCH v4 2/9] usb: dwc3: Execute GCTL Core Soft Reset while switch modes John Stultz
2019-10-29 9:09 ` Felipe Balbi
2019-10-29 21:21 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 3/9] usb: dwc3: Increase timeout for CmdAct cleared by device controller John Stultz
2019-10-29 9:11 ` Felipe Balbi
2019-10-29 21:17 ` John Stultz
2020-05-06 9:00 ` Jun Li
2020-05-06 22:27 ` John Stultz
2020-05-07 3:08 ` Jun Li
2020-05-08 12:22 ` Jun Li
2020-05-08 12:35 ` Felipe Balbi
2020-05-09 8:28 ` Jun Li
2020-05-08 12:33 ` Felipe Balbi
2020-05-09 8:10 ` Jun Li
2020-05-15 9:31 ` Felipe Balbi
2020-05-15 10:07 ` Jun Li
2020-05-15 10:41 ` Felipe Balbi
2020-05-16 0:25 ` Thinh Nguyen
2020-05-16 7:12 ` Felipe Balbi [this message]
2020-05-16 9:20 ` Jun Li
2020-05-16 11:57 ` Felipe Balbi
2020-05-19 2:24 ` Jun Li
2020-05-19 6:28 ` Thinh Nguyen
2020-05-19 6:46 ` Thinh Nguyen
2020-05-19 7:39 ` Jun Li
2020-05-21 1:07 ` Thinh Nguyen
2020-05-21 1:55 ` Thinh Nguyen
2020-05-21 6:20 ` Felipe Balbi
2020-05-21 6:22 ` Felipe Balbi
2020-05-21 7:47 ` Jun Li
2020-05-21 7:33 ` Jun Li
2019-10-28 21:59 ` [PATCH v4 4/9] dt-bindings: usb: dwc3: Allow clock list & resets to be more flexible John Stultz
2019-10-28 21:59 ` [PATCH v4 5/9] usb: dwc3: Rework clock initialization " John Stultz
2019-10-29 9:13 ` Felipe Balbi
2019-10-29 16:08 ` John Stultz
2019-10-30 9:02 ` Felipe Balbi
2019-11-07 21:53 ` Rob Herring
2019-10-28 21:59 ` [PATCH v4 6/9] usb: dwc3: Rework resets " John Stultz
2019-10-29 9:17 ` Felipe Balbi
2019-10-29 18:05 ` John Stultz
2019-10-30 9:01 ` Felipe Balbi
2019-11-07 21:45 ` Rob Herring
2019-10-28 21:59 ` [PATCH v4 7/9] usb: dwc3: Registering a role switch in the DRD code John Stultz
2019-10-29 9:21 ` Felipe Balbi
2019-11-07 23:20 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 8/9] dt-bindings: usb: generic: Add role-switch-default-host binding John Stultz
2019-10-29 9:23 ` Felipe Balbi
2019-10-29 18:26 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 9/9] usb: dwc3: Add host-mode as default support John Stultz
2019-10-29 9:25 ` Felipe Balbi
2019-11-07 22:23 ` John Stultz
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