From: ChiYuan Huang <u0084500@gmail.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
cy_huang <cy_huang@richtek.com>
Subject: Re: [PATCH] usb: typec: tcpm: Fix if vbus before cc, hard_reset_count not reset issue
Date: Tue, 6 Oct 2020 12:37:06 +0800 [thread overview]
Message-ID: <CADiBU38wk825SqtFRAiYqqV47Wwi43AuWKut19qeTbGBZFqPow@mail.gmail.com> (raw)
In-Reply-To: <88586992-650f-a4a1-2fa0-8cef313380fb@roeck-us.net>
Guenter Roeck <linux@roeck-us.net> 於 2020年10月5日 週一 下午11:30寫道:
>
> On 10/5/20 4:08 AM, Greg KH wrote:
> [ ... ]
> >>> What ever happened with this patch, is there still disagreement?
> >>>
> >>
> >> Yes, there is. I wouldn't have added the conditional without reason,
> >> and I am concerned that removing it entirely will open another problem.
> >> Feel free to apply, though - I can't prove that my concern is valid,
> >> and after all we'll get reports from the field later if it is.
> >
> > Ok, can I get an ack so I know who to come back to in the future if
> > there are issues? :)
> >
>
> Not from me, for the reasons I stated. I would be ok with something like:
>
> - if (tcpm_port_is_disconnected(port))
> + if (tcpm_port_is_disconnected(port) ||
> + (tcpm_cc_is_open(port->cc1) && tcpm_cc_is_open(port->cc2)))
>
> to narrow down the condition.
I have tried the above comment and It doesn't work.
How about to change the judgement like as below
- if (tcpm_port_is_disconnected(port))
+ if (tcpm_port_is_disconnected(port) || !port->vbus_present)
The hard_reset_count not reset issue is following by the below order
1. VBUS off ( at the same time, cc is still detected as attached)
port->attached become false and cc is not open
2. After that, cc detached.
due to port->attached is false, tcpm_detach() directly return.
And that's why hard_reset_count is not reset to 0.
>
> Guenter
next prev parent reply other threads:[~2020-10-06 4:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-02 15:35 [PATCH] usb: typec: tcpm: Fix if vbus before cc, hard_reset_count not reset issue cy_huang
2020-09-02 16:57 ` Guenter Roeck
2020-09-03 16:21 ` ChiYuan Huang
2020-09-04 19:41 ` Guenter Roeck
2020-09-05 1:24 ` ChiYuan Huang
2020-09-05 15:51 ` Guenter Roeck
2020-09-06 15:22 ` ChiYuan Huang
2020-09-15 3:07 ` ChiYuan Huang
2020-10-02 13:31 ` Greg KH
2020-10-02 14:26 ` Guenter Roeck
2020-10-05 11:08 ` Greg KH
2020-10-05 15:30 ` Guenter Roeck
2020-10-06 4:37 ` ChiYuan Huang [this message]
2020-10-06 16:52 ` Jun Li
2020-10-06 17:39 ` ChiYuan Huang
2020-10-07 10:13 ` ChiYuan Huang
2020-10-09 6:12 ` Jun Li
2020-10-09 16:06 ` ChiYuan Huang
2020-10-10 11:21 ` Jun Li
2020-10-10 19:31 ` Guenter Roeck
2020-10-12 6:22 ` ChiYuan Huang
2020-10-12 9:25 ` Jun Li
2020-10-12 8:58 ` Jun Li
2020-10-10 15:46 ` Guenter Roeck
2020-10-09 2:58 ` Jun Li
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