Since commit ef4ce6df3289 "video: stm32: stm32_ltdc: fix data enable polarity"
The panel display output wasn't functional anymore.
Device tree display-timings de-active property value must be updated
to 1.

Signed-off-by: Patrice Chotard <patrice.chot...@foss.st.com>
---

 arch/arm/dts/stm32f746-disco-u-boot.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/dts/stm32f746-disco-u-boot.dtsi 
b/arch/arm/dts/stm32f746-disco-u-boot.dtsi
index f88466fa60..a4ce936d7d 100644
--- a/arch/arm/dts/stm32f746-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f746-disco-u-boot.dtsi
@@ -58,7 +58,7 @@
                                vsync-len = <10>;
                                hsync-active = <0>;
                                vsync-active = <0>;
-                               de-active = <0>;
+                               de-active = <1>;
                                pixelclk-active = <1>;
                        };
                };
-- 
2.25.1

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