Primary and companion encoders need to set the same mode for
things to work properly.
rcar_lvds_mode_set gets called into for the primary encoder only,
therefore initialize the companion encoder mode while sorting
the primary encoder mode out.
Fixes: fa440d870358 ("drm: rcar-du: lvds: Add support for dual-link mode")
Signed-off-by: Fabrizio Castro <fabrizio.castro@xxxxxxxxxxxxxx>
---
v3->v4:
* New patch extracted from patch:
"drm: rcar-du: lvds: Add dual-LVDS panels support"
---
drivers/gpu/drm/rcar-du/rcar_lvds.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index cb2147c..eed5611 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -614,6 +614,18 @@ static void rcar_lvds_mode_set(struct drm_bridge *bridge,
lvds->display_mode = *adjusted_mode;
rcar_lvds_get_lvds_mode(lvds);
+ if (lvds->companion) {
+ struct rcar_lvds *companion_lvds = bridge_to_rcar_lvds(
+ lvds->companion);
+
+ /*
+ * FIXME: We should not be messing with the companion encoder
+ * private data from the primary encoder, but since
+ * rcar_lvds_mode_set gets called into for the primary encoder
+ * only, we don't have much of a choice for now.
+ */
+ companion_lvds->mode = lvds->mode;
+ }
}
static int rcar_lvds_attach(struct drm_bridge *bridge)
--
2.7.4
