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

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Date:   Fri, 7 Aug 2020 08:49:37 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     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 8:37 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 ;-)

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
>