[PATCH 12/13] arm: dts: mt8188: add hdmi override node

The mt8188 SoC provides an HDMI encoder and PHY fed through the DPI1
interface attached to the vdosys1 display data path.

Compared to the kernel, the following U-Boot specific properties are
added to the hdmi node:
- a "memory-region" phandle to the framebuffer reserved-memory region
- phandles to all the components of the pipeline, since U-Boot has no
  DRM framework to walk the graph

Signed-off-by: Julien Stephan <[email protected]>
---
 arch/arm/dts/mt8188-u-boot.dtsi | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/dts/mt8188-u-boot.dtsi b/arch/arm/dts/mt8188-u-boot.dtsi
index 923e52522de..26a2bddd24e 100644
--- a/arch/arm/dts/mt8188-u-boot.dtsi
+++ b/arch/arm/dts/mt8188-u-boot.dtsi
@@ -79,3 +79,24 @@
 &mmc0 {
 	bootph-pre-ram;
 };
+
+&hdmi {
+	/* U-Boot specific: the framebuffer lives in this reserved region */
+	memory-region = <&framebuffer>;
+
+	/*
+	 * U-Boot specific: U-Boot has no DRM framework, so the video
+	 * driver locates the components of the display pipeline directly
+	 * through these phandles.
+	 */
+	mediatek,dpi1 = <&dpi1>;
+	mediatek,vdosys1 = <&vdosys1_pipeline>;
+	mediatek,merge3 = <&merge3>;
+	mediatek,merge5 = <&merge5>;
+	mediatek,mixer = <&ethdr0>;
+	mediatek,mutex1 = <&mutex1>;
+	mediatek,padding4 = <&padding4>;
+	mediatek,padding5 = <&padding5>;
+	mediatek,rdma4 = <&vdo1_rdma4>;
+	mediatek,rdma5 = <&vdo1_rdma5>;
+};

-- 
2.54.0