From: Chen-Yu Tsai <wens@csie.org>
Date: Fri, 21 Apr 2017 16:38:53 +0800
Subject: drm/sun4i: backend: Save pointer to device tree node
Git-commit: 2c03e2fb063f33694e35bbade6d9186274b9a02f
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Save a pointer to the backend's underlying device tree node in its
data structure. This will be used later for downstream tcons to find
and match their respective upstream backends.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/sun4i/sun4i_backend.c |    1 +
 drivers/gpu/drm/sun4i/sun4i_backend.h |    2 ++
 2 files changed, 3 insertions(+)

--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -352,6 +352,7 @@ static int sun4i_backend_bind(struct dev
 		return -ENOMEM;
 	dev_set_drvdata(dev, backend);
 
+	backend->node = dev->of_node;
 	backend->id = sun4i_backend_of_get_id(dev->of_node);
 	if (backend->id < 0)
 		return backend->id;
--- a/drivers/gpu/drm/sun4i/sun4i_backend.h
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.h
@@ -15,6 +15,7 @@
 
 #include <linux/clk.h>
 #include <linux/list.h>
+#include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 
@@ -140,6 +141,7 @@
 #define SUN4I_BACKEND_PIPE_OFF(p)		(0x5000 + (0x400 * (p)))
 
 struct sun4i_backend {
+	struct device_node	*node;
 	struct regmap		*regs;
 
 	struct reset_control	*reset;