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

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Message-ID: <07b39c97-30be-4e82-044e-51b0d98a5197@quicinc.com>
Date:   Fri, 16 Sep 2022 14:17:30 -0700
From:   Jeff Johnson <quic_jjohnson@...cinc.com>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>
CC:     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 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 /?

> 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.