From: Chen-Yu Tsai <wens@csie.org>
Date: Thu, 23 Feb 2017 08:05:34 +0000 (+0800)
Subject: drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node
X-Git-Tag: v4.14-rc1~674^2~8^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7544860733d158e3edbf309f27e79e258c8f66bd;p=platform%2Fkernel%2Flinux-rpi.git

drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node

The way drm_of_find_possible_crtcs works is it tries to match the
remote-endpoint of the given node's various endpoints to all the
crtc's .port field. Thus we need to set drm_crtc.port to the output
port node of the underlying TCON.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---

diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
index 7d332fc..eec13ce 100644
--- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
@@ -19,6 +19,7 @@
 #include <linux/clk-provider.h>
 #include <linux/ioport.h>
 #include <linux/of_address.h>
+#include <linux/of_graph.h>
 #include <linux/of_irq.h>
 #include <linux/regmap.h>
 
@@ -160,5 +161,9 @@ struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
 
 	drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
 
+	/* Set crtc.port to output port node of the tcon */
+	scrtc->crtc.port = of_graph_get_port_by_id(drv->tcon->dev->of_node,
+						   1);
+
 	return scrtc;
 }