From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Tue, 24 May 2016 06:31:49 +0000 (+0200)
Subject: drm/imx: imx-ldb: honor 'native-mode' property when selecting video mode from DT
X-Git-Tag: v5.15~13454^2~2^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c82b4d73e2cd32fff41be0cd6e75ea83d32943b3;p=platform%2Fkernel%2Flinux-starfive.git

drm/imx: imx-ldb: honor 'native-mode' property when selecting video mode from DT

This patch allows to select a specific video mode from a list of modes
defined in DT by setting the 'native-mode' property appropriately.

This change does not affect the behaviour of existing platforms, since
they either:
   - have just one display-timings subnode
   - have the native-mode property pointing to the first entry
   - let the bootloader select the appropriate timing

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 5f8f0bf..beff793 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -25,6 +25,7 @@
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
+#include <video/of_display_timing.h>
 #include <video/of_videomode.h>
 #include <linux/regmap.h>
 #include <linux/videodev2.h>
@@ -625,7 +626,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
 				/* fallback to display-timings node */
 				ret = of_get_drm_display_mode(child,
 							      &channel->mode,
-							      0);
+							      OF_USE_NATIVE_MODE);
 				if (!ret)
 					channel->mode_valid = 1;
 			}