linux-kernel - Re: [PATCH v9 2/5] drm/msm/dp: add displayPort driver support

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Message-ID: <CABXOdTeYOVWKNWfJxxVDC6Mdu1aisCs6yDCAdxRQGuUp8r2EQA@mail.gmail.com>
Date:   Fri, 7 Aug 2020 09:11:32 -0700
From:   Guenter Roeck <groeck@...gle.com>
To:     Rob Clark <robdclark@...il.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Tanmay Shah <tanmay@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Sean Paul <seanpaul@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, aravindh@...eaurora.org,
        Abhinav Kumar <abhinavk@...eaurora.org>, khsieh@...eaurora.org,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Vara Reddy <varar@...eaurora.org>,
        Guenter Roeck <groeck@...omium.org>
Subject: Re: [PATCH v9 2/5] drm/msm/dp: add displayPort driver support

On Fri, Aug 7, 2020 at 8:48 AM Rob Clark <robdclark@...il.com> wrote:
>
> On Fri, Aug 7, 2020 at 8:37 AM Randy Dunlap <rdunlap@...radead.org> wrote:
> >
> > On 8/7/20 12:17 AM, Tanmay Shah wrote:
> > > diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> > > index 6deaa7d01654..ea3c4d094d09 100644
> > > --- a/drivers/gpu/drm/msm/Kconfig
> > > +++ b/drivers/gpu/drm/msm/Kconfig
> > > @@ -57,6 +57,14 @@ config DRM_MSM_HDMI_HDCP
> > >       help
> > >         Choose this option to enable HDCP state machine
> > >
> > > +config DRM_MSM_DP
> > > +     bool "Enable DP support in MSM DRM driver"
> >
> >         bool "Enabled DisplayPort support in MSM DRM driver"
> >
> > > +     depends on DRM_MSM
> > > +     help
> > > +       Compile in support for DP driver in msm drm driver. DP external
> >
> >                                               MSM DRM
> >
> > Also:
> > I can't find anywhere in drivers/gpu/drm/msm/ that explains what MSM means.
> > What does it mean?
>
> I believe it stands for "Mobile Station Modem".. in the pre-devicetree
> days it was the name of the qcom platform.  Things later shifted to
> "qcom" instead, but that was after this driver was merged.  At this
> point it is just three letters ;-)
>

FWIW: https://en.wikichip.org/wiki/qualcomm/msm

Guenter

> BR,
> -R
>
> > > +       display support is enabled through this config option. It can
> > > +       be primary or secondary display on device.
> > > +
> > >  config DRM_MSM_DSI
> > >       bool "Enable DSI support in MSM DRM driver"
> > >       depends on DRM_MSM
> >
> > thanks.
> > --
> > ~Randy
> >