[PATCH AUTOSEL for 4.9 016/219] drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node

Sasha Levin
2018-03-04T00:06:18Z

From: Chen-Yu Tsai <wens@csie.org>

[ Upstream commit 7544860733d158e3edbf309f27e79e258c8f66bd ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/gpu/drm/sun4i/sun4i_crtc.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
index 4a192210574f..caba0311c86c 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>

@@ -136,5 +137,9 @@ 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;
}
--
2.14.1