From 0a370db816f8632bc71d7d0c6f59a82d2934f0df Mon Sep 17 00:00:00 2001
From: Jacopo Mondi <jacopo+renesas@jmondi.org>
Date: Fri, 6 Sep 2019 15:50:12 +0200
Subject: drm: rcar-du: kms: Expand comment in vsps parsing routine
Git-commit: 0a370db816f8632bc71d7d0c6f59a82d2934f0df
Patch-mainline: v5.5-rc1
References: bsc#1152489
Expand comment in the 'vsps' parsing routine to specify the LIF
channel index defaults to 0 in case the second cell of the property
is not specified to remain compatible with older DT bindings.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 2dc9caee8767..0d59f390de19 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -585,7 +585,11 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
vsps[j].crtcs_mask |= BIT(i);
- /* Store the VSP pointer and pipe index in the CRTC. */
+ /*
+ * Store the VSP pointer and pipe index in the CRTC. If the
+ * second cell of the 'vsps' specifier isn't present, default
+ * to 0 to remain compatible with older DT bindings.
+ */
rcdu->crtcs[i].vsp = &rcdu->vsps[j];
rcdu->crtcs[i].vsp_pipe = cells >= 1 ? args.args[0] : 0;
}
--
2.28.0