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From:   Fabrizio Castro <fabrizio.castro@bp.renesas.com>
To:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
        Jacopo Mondi <jacopo+renesas@jmondi.org>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>
Cc:     Fabrizio Castro <fabrizio.castro@bp.renesas.com>,
        dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org,
        linux-kernel@vger.kernel.org, Simon Horman <horms@verge.net.au>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Chris Paterson <Chris.Paterson2@renesas.com>,
        Biju Das <biju.das@bp.renesas.com>
Subject: [PATCH/RFC 09/12] drm: rcar-du: lvds: Fix companion's mode
Date:   Fri,  2 Aug 2019 08:34:06 +0100
Message-Id: <1564731249-22671-10-git-send-email-fabrizio.castro@bp.renesas.com>
In-Reply-To: <1564731249-22671-1-git-send-email-fabrizio.castro@bp.renesas.com>
References: <1564731249-22671-1-git-send-email-fabrizio.castro@bp.renesas.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The companion encoder needs to be told to use the same
mode as the primary encoder.

Fixes: e9e8798ab7b8 ("drm: rcar-du: lvds: Add support for dual-link mode")
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
---
 drivers/gpu/drm/rcar-du/rcar_lvds.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index edd63f5..7944ae9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -415,8 +415,12 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)
 		return;
 
 	/* Enable the companion LVDS encoder in dual-link mode. */
-	if (lvds->dual_link && lvds->companion)
+	if (lvds->dual_link && lvds->companion) {
+		struct rcar_lvds *companion_lvds = bridge_to_rcar_lvds(
+							lvds->companion);
+		companion_lvds->mode = lvds->mode;
 		lvds->companion->funcs->enable(lvds->companion);
+	}
 
 	/*
 	 * Hardcode the channels and control signals routing for now.
-- 
2.7.4