[PATCH v4] ARM: dts: exynos: Enable HDMI for Arndale Octa board

[Milo Kim <woogyom.kim-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

* GPIO for HDMI hot plug detect
  GPX3_7 is used. The HPD awareness is done when the GPIO is active high.

* Enable HDMI block in Exynos5420
  HDMI VDD and PLL consume 1.0V LDO6 (PVDD_ANAIP_1V0) and HDMI oscillator
  requires 1.8V LDO7 (PVDD_ANAIP_1V8).

* Support HDMI display data channel
  I2C #2 is assigned for the HDMI DDC. It enables the EDID access.

Cc: Kukjin Kim <kgene-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Krzysztof Kozlowski <k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Milo Kim <woogyom.kim-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/exynos5420-arndale-octa.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index 39a3b81..d2ad48e 100644
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -70,6 +70,15 @@
 	status = "disabled";
 };
 
+&hdmi {
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	vdd_osc-supply = <&ldo7_reg>;
+	vdd_pll-supply = <&ldo6_reg>;
+	vdd-supply = <&ldo6_reg>;
+	ddc = <&i2c_2>;
+	status = "okay";
+};
+
 &hsi2c_4 {
 	status = "okay";
 
@@ -347,6 +356,10 @@
 	};
 };
 
+&i2c_2 {
+	status = "okay";
+};
+
 &mmc_0 {
 	status = "okay";
 	broken-cd;
-- 
2.9.3

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