From a53358a31c989c360ea59536d28762b9d2d68d19 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Mon, 5 Aug 2019 18:18:37 +0200 Subject: drm: rcar_lvds: Fix dual link mode operations 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 Signed-off-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- drivers/gpu/drm/rcar-du/rcar_lvds.c | 6 ++---- 1 file 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 -- cgit v1.2.3