On Friday 13 November 2015 13:46:01 Tomi Valkeinen wrote:
> On 13/11/15 12:29, H. Nikolaus Schaller wrote:
> > Include VENC in the set of drivers where it is assimed that the cable
> > is always connected. Like DPI, DSI, DBI and SDI do.
> >
> > Otherwise, the VENC will return cable status "unknown" and is not enabled
> > by the X-server. So there is no video output signal.
> >
> > Tested on: BeagleBoard XM, GTA04 and OpenPandora
> >
> > Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
> > ---
> >
> > drivers/gpu/drm/omapdrm/omap_connector.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c
> > b/drivers/gpu/drm/omapdrm/omap_connector.c index 83f2a91..98ddb5d 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_connector.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_connector.c
> > @@ -120,6 +120,7 @@ static enum drm_connector_status
> > omap_connector_detect(
> > else
> > ret = connector_status_disconnected;
> > } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
> > + dssdev->type == OMAP_DISPLAY_TYPE_VENC ||
> > dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
> > dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
> > dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
>
> I have no idea why VENC is not working for you when using
> connector_status_unknown, but I just tested DPI with
> connector_status_unknown (i.e. changed the above func to return unknown
> for DPI), and it works fine with X and X omap driver. And xrandr
> confirms that the connection status is unknown:
>
> # xrandr
> Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 2048 x 2048
> HDMI-1 disconnected (normal left inverted right x axis y axis)
> None-1 unknown connection 1920x1200+0+0 (normal left inverted right x
> axis y axis) 0mm x 0mm
> 1920x1200 60.00*+ 60.00 +
>
> Grep also shows that there are many drivers using
> connector_status_unknown, so I'm guessing it should work fine...
And beside it's not right to consider VENC as always connected, as it isn't.
The unknown status is there for a reason, to describe connectors for which we
can't get any status information. The situation is different for DPI, DBI, SDI
and DSI as those are on-board busses that connect to a non-removable panel, so
we can say with a good confidence that the panel is connected (the situation
could be changed with a hammer and a chisel, but that's unlikely to happen,
hence the confidence).
--
Regards,
Laurent Pinchart
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