linux-kernel - [PATCH v4 3/5] arm64: dts: exynos7870-on7xelte: enable display panel support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251031-exynos7870-drm-dts-v4-3-c1f77fb16b87@disroot.org>
Date: Fri, 31 Oct 2025 00:50:17 +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 v4 3/5] 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, remove 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 | 57 ++++++++++++++++------
 1 file changed, 43 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
index 2a3d91d390ec7a6e0c49dde493a99e5b18ea2235..29e124c72e9d25f05705909a981477f46a86efcf 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
@@ -27,20 +27,7 @@ aliases {
 	};
 
 	chosen {
-		#address-cells = <2>;
-		#size-cells = <1>;
-		ranges;
-
 		stdout-path = &serial2;
-
-		framebuffer@...00000 {
-			compatible = "simple-framebuffer";
-			reg = <0x0 0x67000000 (1080 * 1920 * 4)>;
-			width = <1080>;
-			height = <1920>;
-			stride = <(1080 * 4)>;
-			format = "a8r8g8b8";
-		};
 	};
 
 	gpio-keys {
@@ -108,8 +95,9 @@ ramoops@...00000 {
 			pmsg-size = <0x4000>;
 		};
 
-		framebuffer@...00000 {
+		cont_splash_mem: framebuffer@...00000 {
 			reg = <0x0 0x67000000 (1080 * 1920 * 4)>;
+			iommu-addresses = <&decon 0x67000000 (1080 * 1920 * 4)>;
 			no-map;
 		};
 	};
@@ -122,6 +110,47 @@ vibrator {
 	};
 };
 
+&decon {
+	memory-region = <&cont_splash_mem>;
+
+	status = "okay";
+};
+
+&dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	samsung,burst-clock-frequency = <1001000000>;
+	samsung,esc-clock-frequency = <16000000>;
+	samsung,pll-clock-frequency = <26000000>;
+
+	status = "okay";
+
+	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";
 };

-- 
2.51.0