Re: [PATCH v3 4/7] drm/i915: utilize subconnector property for DP

From: Alex Deucher <alexdeucher@gmail.com>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Oleg Vasilev <oleg.vasilev@intel.com>,
	Maling list - DRI developers <dri-devel@lists.freedesktop.org>,
	Emil Velikov <emil.velikov@collabora.com>
Subject: Re: [PATCH v3 4/7] drm/i915: utilize subconnector property for DP
Date: Thu, 29 Aug 2019 09:09:14 -0400	[thread overview]
Message-ID: <CADnq5_Omgu7J+3rZjqeQicPbVA0Zopx1mufOb5arLxDNtHnHrg@mail.gmail.com> (raw)
In-Reply-To: <20190828142725.GC7482@intel.com>

On Wed, Aug 28, 2019 at 10:27 AM Ville Syrjälä
<ville.syrjala@linux.intel.com> wrote:
>
> On Mon, Aug 26, 2019 at 04:22:13PM +0300, Oleg Vasilev wrote:
> > Since DP-specific information is stored in driver's structures, every
> > driver needs to implement subconnector property by itself.
> >
> > v2: updates to match previous commit changes
> >
> > Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
> > Tested-by: Oleg Vasilev <oleg.vasilev@intel.com>
> > Signed-off-by: Oleg Vasilev <oleg.vasilev@intel.com>
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Cc: intel-gfx@lists.freedesktop.org
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> > index 6da6a4859f06..9c97ece803eb 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -5434,6 +5434,10 @@ intel_dp_detect(struct drm_connector *connector,
> >       if (status != connector_status_connected && !intel_dp->is_mst)
> >               intel_dp_unset_edid(intel_dp);
> >
> > +     drm_dp_set_subconnector_property(connector,
> > +                                      status,
> > +                                      intel_dp->dpcd,
> > +                                      intel_dp->downstream_ports);
> >       return status;
> >  }
> >
> > @@ -6332,6 +6336,8 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
> >       struct drm_i915_private *dev_priv = to_i915(connector->dev);
> >       enum port port = dp_to_dig_port(intel_dp)->base.port;
> >
> > +     drm_mode_add_dp_subconnector_property(connector);
>
> Maybe skip this for eDP?

Not sure if you have something similar, but there are AMD platforms
that contain eDP to LVDS bridges.  Then again, probably not a big deal
for the laptop panel.

Alex

>
> > +
> >       if (!IS_G4X(dev_priv) && port != PORT_A)
> >               intel_attach_force_audio_property(connector);
> >
> > --
> > 2.23.0
>
> --
> Ville Syrjälä
> Intel
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