linux-kernel - [PATCH 3/5] arch: arm64: dts: exynos7870-on7xelte: enable display panel support

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Message-Id: <20250612-exynos7870-drm-dts-v1-3-88c0779af6cb@disroot.org>
Date: Thu, 12 Jun 2025 20:53:39 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 3/5] arch: arm64: dts: exynos7870-on7xelte: enable display
 panel support

Enable DECON and DSI nodes, and add the compatible display panel and
appropriate panel timings for this device. Also, disable the
simple-framebuffer node in favor of the panel.

This device has a 1080x1920 Synaptics TD4300 display panel.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
index eb97dcc415423f405d7df9b9869b2db3432fb483..86a7fc2554a137752862c37d27cf9813b3ac5514 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
@@ -40,6 +40,8 @@ framebuffer@...00000 {
 			height = <1920>;
 			stride = <(1080 * 4)>;
 			format = "a8r8g8b8";
+
+			status = "disabled";
 		};
 	};
 
@@ -122,6 +124,44 @@ vibrator {
 	};
 };
 
+&decon {
+	status = "okay";
+};
+
+&dsi {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	samsung,burst-clock-frequency = <1001000000>;
+	samsung,esc-clock-frequency = <16000000>;
+	samsung,pll-clock-frequency = <26000000>;
+
+	panel@0 {
+		compatible = "syna,td4300-panel";
+		reg = <0>;
+
+		backlight-gpios = <&gpd3 5 GPIO_ACTIVE_LOW>;
+
+		width-mm = <68>;
+		height-mm = <121>;
+
+		panel-timing {
+			clock-frequency = <144389520>;
+
+			hactive = <1080>;
+			hsync-len = <4>;
+			hfront-porch = <120>;
+			hback-porch = <32>;
+
+			vactive = <1920>;
+			vsync-len = <2>;
+			vfront-porch = <21>;
+			vback-porch = <4>;
+		};
+	};
+};
+
 &gpu {
 	status = "okay";
 };

-- 
2.49.0