OMAPDSS: add helpers to get mgr or output from display

Add two helper functions that can be used to find either the DSS output
or the overlay manager that is connected to the given display.

This hides how the output and the manager are actually connected, making
it easier to change the connections in the future.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 826586ffbe83..b3577cb367af 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -247,6 +247,9 @@ static int omap_modeset_init(struct drm_device *dev)
                 struct drm_encoder *encoder = priv->encoders[i];
                 struct omap_dss_device *dssdev =
                                         omap_encoder_get_dssdev(encoder);
+                struct omap_dss_output *output;
+
+                output = omapdss_find_output_from_display(dssdev);
 
                 /* figure out which crtc's we can connect the encoder to: */
                 encoder->possible_crtcs = 0;
@@ -259,7 +262,7 @@ static int omap_modeset_init(struct drm_device *dev)
                         supported_outputs =
                                 dss_feat_get_supported_outputs(crtc_channel);
 
-                        if (supported_outputs & dssdev->output->id)
+                        if (supported_outputs & output->id)
                                 encoder->possible_crtcs |= (1 << id);
                 }
         }