linux-kernel - Re: [PATCH v2 5/7] drm/msm/dp: Implement hpd

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Message-ID: <20220919212218.chyeo7uga2sitwk7@builder.lan>
Date:   Mon, 19 Sep 2022 16:22:18 -0500
From:   Bjorn Andersson <andersson@...nel.org>
To:     Jeff Johnson <quic_jjohnson@...cinc.com>
Cc:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/7] drm/msm/dp: Implement hpd_notify()

On Fri, Sep 16, 2022 at 02:17:30PM -0700, Jeff Johnson wrote:
> On 9/16/2022 1:00 PM, Bjorn Andersson wrote:
> > From: Bjorn Andersson <bjorn.andersson@...aro.org>
> > 
> > The DisplayPort controller's hot-plug mechanism is based on pinmuxing a
> > physical signal no a GPIO pin into the controller. This is not always
> 
> nit: s/ no / on /?
> 

Correct, thank you Jeff.

> > possible, either because there aren't dedicated GPIOs available or
> > because the hot-plug signal is a virtual notification, in cases such as
> > USB Type-C.
>