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authorJacopo Mondi <jacopo+renesas@jmondi.org>2019-08-05 18:18:37 +0200
committerLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2019-08-16 15:53:28 +0300
commita53358a31c989c360ea59536d28762b9d2d68d19 (patch)
tree88f47a77433cd2476ffd2125f75c6babfa97e7a1
parenta85abd5d45adba75535b7fc6d9f78329a693b7a9 (diff)
drm: rcar_lvds: Fix dual link mode operationsdu-fixes-20190816drm/du/fixes
The R-Car LVDS encoder units support dual-link operations by splitting the pixel output between the primary encoder and the companion encoder. Currently the companion encoder fails at probe time, causing the registration of the primary to fail as well, preventing the whole DU unit from being registered at all. Fix this by not bailing out from probe with error if the "renesas,companion" property is not specified. Fixes: fa440d870358 ("drm: rcar-du: lvds: Add support for dual-link mode") Reported-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
-rw-r--r--drivers/gpu/drm/rcar-du/rcar_lvds.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index 1c62578590f4..082d02c84024 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -673,10 +673,8 @@ static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds)
/* Locate the companion LVDS encoder for dual-link operation, if any. */
companion = of_parse_phandle(dev->of_node, "renesas,companion", 0);
- if (!companion) {
- dev_err(dev, "Companion LVDS encoder not found\n");
- return -ENXIO;
- }
+ if (!companion)
+ return 0;
/*
* Sanity check: the companion encoder must have the same compatible

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