[PATCH v3 5/6] arm64: dts: exynos7870-a2corelte: enable display panel support

Kaustabh Chakraborty
2025-09-28T17:57:43Z

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 540x960 Synaptics TD4101 display panel.

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
---
.../arm64/boot/dts/exynos/exynos7870-a2corelte.dts | 57 ++++++++++++++++------
1 file changed, 43 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
index eb7b48593187409ce6653b7d857b63f6946aa4f7..07dff8809afbd34ed91f7d9cf270a16ce7992539 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
@@ -27,20 +27,7 @@ aliases {
};

chosen {
- #address-cells = <2>;
- #size-cells = <1>;
- ranges;
-
stdout-path = &serial2;
-
- framebuffer@67000000 {
- compatible = "simple-framebuffer";
- reg = <0x0 0x67000000 (540 * 960 * 4)>;
- width = <540>;
- height = <960>;
- stride = <(540 * 4)>;
- format = "a8r8g8b8";
- };
};

gpio-keys {
@@ -110,8 +97,9 @@ ramoops@46800000 {
pmsg-size = <0x4000>;
};

- framebuffer@67000000 {
+ cont_splash_mem: framebuffer@67000000 {
reg = <0x0 0x67000000 (540 * 960 * 4)>;
+ iommu-addresses = <&decon 0x67000000 (540 * 960 * 4)>;
no-map;
};
};
@@ -124,6 +112,47 @@ vibrator {
};
};

+&decon {
+ memory-region = <&cont_splash_mem>;
+
+ status = "okay";
+};
+
+&dsi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ samsung,burst-clock-frequency = <836000000>;
+ samsung,esc-clock-frequency = <16000000>;
+ samsung,pll-clock-frequency = <26000000>;
+
+ status = "okay";
+
+ panel@0 {
+ compatible = "syna,td4101-panel";
+ reg = <0>;
+
+ backlight-gpios = <&gpd3 7 GPIO_ACTIVE_LOW>;
+
+ width-mm = <62>;
+ height-mm = <110>;
+
+ panel-timing {
+ clock-frequency = <69336720>;
+
+ hactive = <540>;
+ hsync-len = <4>;
+ hfront-porch = <364>;
+ hback-porch = <40>;
+
+ vactive = <960>;
+ vsync-len = <2>;
+ vfront-porch = <244>;
+ vback-porch = <13>;
+ };
+ };
+};
+
&gpu {
status = "okay";
};

--
2.51.0