linux-kernel - Re: [PATCH v6 1/8] drm/msm/dp: Add eDP support via aux

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Message-ID: <CAD=FV=UTYQXngXmA_civiCMDctZr6tJNjNXynQuCwxvgiJijLg@mail.gmail.com>
Date:   Wed, 30 Mar 2022 17:33:39 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Rob Clark <robdclark@...il.com>,
        Sean Paul <seanpaul@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        quic_kalyant <quic_kalyant@...cinc.com>,
        "Abhinav Kumar (QUIC)" <quic_abhinavk@...cinc.com>,
        "Kuogee Hsieh (QUIC)" <quic_khsieh@...cinc.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        quic_vproddut <quic_vproddut@...cinc.com>,
        quic_aravindh@...cinc.com
Subject: Re: [PATCH v6 1/8] drm/msm/dp: Add eDP support via aux_bus

Hi,

On Wed, Mar 30, 2022 at 4:19 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
> > +             bridge->ops =
> > +                     DRM_BRIDGE_OP_DETECT |
> > +                     DRM_BRIDGE_OP_HPD |
> > +                     DRM_BRIDGE_OP_MODES;
>
> I think OP_MODES should be used for eDP, shouldn't it?

No. It's confusing, but basically to get the power sequencing correct
we end up driving the EDID read from the panel driver in the eDP case.

-Doug