[PATCH v2 13/14] arm: dts: mt8390: 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.

Add the U-Boot specific bits to mt8390-genio-common-u-boot.dtsi:
- a "memory-region" phandle on the hdmi node pointing at the framebuffer
  reserved-memory region;
- aliases for the pipeline resources that have no upstream alias (the
  vdosys1 syscon and the larb2/larb3 SMI larbs), which the video driver
  resolves directly since U-Boot has no DRM framework to walk the graph.

Signed-off-by: Julien Stephan <[email protected]>
---
 arch/arm/dts/mt8390-genio-common-u-boot.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm/dts/mt8390-genio-common-u-boot.dtsi b/arch/arm/dts/mt8390-genio-common-u-boot.dtsi
index 95b2f66973c..9485315b79b 100644
--- a/arch/arm/dts/mt8390-genio-common-u-boot.dtsi
+++ b/arch/arm/dts/mt8390-genio-common-u-boot.dtsi
@@ -5,6 +5,18 @@
  */
 
 / {
+	/*
+	 * U-Boot specific: the video driver looks up every pipeline component
+	 * by alias. These resources have no upstream alias, so add one here:
+	 * the vdosys1 syscon (whose register block holds the display routing
+	 * muxes) and the SMI larbs feeding the display data path.
+	 */
+	aliases {
+		larb2 = &larb2;
+		larb3 = &larb3;
+		vdosys1 = &vdosys1;
+	};
+
 	reserved-memory {
 		/*
 		 * Keep these regions clear of the board reserved-memory
@@ -24,3 +36,8 @@
 		};
 	};
 };
+
+&hdmi {
+	/* U-Boot specific: the framebuffer lives in this reserved region */
+	memory-region = <&framebuffer>;
+};

-- 
2.54.0