From: Prashant Malani <pmalani@chromium.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stephen Boyd <swboyd@chromium.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
Pin-yen Lin <treapking@chromium.org>
Subject: Re: [PATCH 1/2] dt-bindings: usb: Introduce GPIO-based SBU mux
Date: Tue, 23 Aug 2022 11:21:33 -0700 [thread overview]
Message-ID: <CACeCKafDfiZ8o2Ac-QYTcWT0dFtX6gXfrBPsGgwxRG+-FF4aQw@mail.gmail.com> (raw)
In-Reply-To: <YwBdTAIqFbedC6Oa@builder.lan>
On Fri, Aug 19, 2022 at 9:04 PM Bjorn Andersson
<bjorn.andersson@linaro.org> wrote:
>
> On Fri 19 Aug 17:18 CDT 2022, Prashant Malani wrote:
>
> > On Fri, Aug 19, 2022 at 2:39 PM Bjorn Andersson
> > <bjorn.andersson@linaro.org> wrote:
>
> Are you saying that two of your SS-lanes in connector A are connected to
> directly to the QMP PHY at the same time as two SS-lanes from connector
> B are connected to the same two pads on the QMP PHY - without any
> mux etc inbetween?
>
> I.e. that there are a set of pins in connector A which is directly
> connected to a set of pins in connector B?
>
>
> I was under the impression that in your hardware there's some component
> muxing the single DP output to one of the connectors. If so there should
> be no graph-link directly connecting the two usb-c-connectors and the
> one QMP PHY.
>
> Is this not the case?
I can't speak to the QMP PHY specifically (since I'm not using that hardware),
but your impression is right.
There is a component (anx7625) muxing the single DP output to the 2
usb-c-connectors
(specifically, 2 lanes each from the 2 usb-c-connectors).
The other 2 lanes (from the 2 USB-C-connectors) go to a USB3 hub; hence the need
for 2 endpoints for each usb-c-connector).
So, the anx7625 should register the mode switches and it needs the
graph connections
from 2 usb-c-connectors
BR,
-Prashant
next prev parent reply other threads:[~2022-08-23 19:31 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 20:47 [PATCH 0/2] usb: typec: mux: GPIO-based SBU mux Bjorn Andersson
2022-08-10 20:47 ` [PATCH 1/2] dt-bindings: usb: Introduce " Bjorn Andersson
2022-08-11 9:14 ` Krzysztof Kozlowski
2022-08-14 21:01 ` Rob Herring
2022-08-17 23:00 ` Bjorn Andersson
2022-08-19 1:09 ` Stephen Boyd
2022-08-19 20:14 ` Prashant Malani
2022-08-19 20:49 ` Stephen Boyd
2022-08-19 21:39 ` Bjorn Andersson
2022-08-19 22:18 ` Prashant Malani
2022-08-20 4:04 ` Bjorn Andersson
2022-08-23 18:21 ` Prashant Malani [this message]
2022-08-19 22:00 ` Bjorn Andersson
2022-08-19 22:55 ` Prashant Malani
2022-08-20 4:09 ` Bjorn Andersson
2022-08-23 18:54 ` Prashant Malani
2022-08-26 3:02 ` Bjorn Andersson
2022-08-19 21:26 ` Bjorn Andersson
2022-08-20 3:51 ` Stephen Boyd
2022-08-20 4:56 ` Bjorn Andersson
2022-08-26 1:49 ` Stephen Boyd
2022-08-10 20:47 ` [PATCH 2/2] usb: typec: mux: " Bjorn Andersson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CACeCKafDfiZ8o2Ac-QYTcWT0dFtX6gXfrBPsGgwxRG+-FF4aQw@mail.gmail.com \
--to=pmalani@chromium.org \
--cc=bjorn.andersson@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=heikki.krogerus@linux.intel.com \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=krzysztof.kozlowski@linaro.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=robh@kernel.org \
--cc=swboyd@chromium.org \
--cc=treapking@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.