On Wed, Oct 26, 2016 at 12:05:55PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Only certain types of pdts have the DDC bus registered, so check for > that before we attempt the EDID read. Othwewise we risk playing around > with an i2c adapter that doesn't actually exist. > > Cc: stable@xxxxxxxxxxxxxxx > Cc: Carlos Santa <carlos.santa@xxxxxxxxx> > Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> > Tested-by: Carlos Santa <carlos.santa@xxxxxxxxx> > Tested-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97666 > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/drm_dp_mst_topology.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c > index 956babc161e5..690d1b407a90 100644 > --- a/drivers/gpu/drm/drm_dp_mst_topology.c > +++ b/drivers/gpu/drm/drm_dp_mst_topology.c > @@ -1162,7 +1162,9 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb, > drm_dp_put_port(port); > goto out; > } > - if (port->port_num >= DP_MST_LOGICAL_PORT_0) { > + if ((port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV || > + port->pdt == DP_PEER_DEVICE_SST_SINK) && > + port->port_num >= DP_MST_LOGICAL_PORT_0) { Matches what's in drm_dp_port_setup_pdt. Not sure this is the most reliable way to do this though, but I can't come up with anything better. Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> > port->cached_edid = drm_get_edid(port->connector, &port->aux.ddc); > drm_mode_connector_set_tile_property(port->connector); > } > -- > 2.7.4 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
