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Message-Id: <20260106-mt8183-display-graph-v2-1-e7e56054eef5@abscue.de>
Date: Tue, 06 Jan 2026 11:11:12 +0100
From: Otto Pflüger <otto.pflueger@...cue.de>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
Evans Jahja <evansjahja13@...il.com>, Chen-Yu Tsai <wenst@...omium.org>,
Otto Pflüger <otto.pflueger@...cue.de>
Subject: [PATCH v2] arm64: dts: mediatek: mt8183: Add missing endpoint IDs
to display graph
The endpoint IDs in the display graph are expected to match the
associated display path number, i.e. all endpoints connected to
mmsys_ep_main must have reg = <0> and all endpoints connected to
mmsys_ep_ext must have reg = <1>.
Add the missing ID to all endpoints in the display graph, based on
mt8365.dtsi as an existing example that does this correctly.
Fixes: e72d63fa0563 ("arm64: dts: mediatek: mt8183: Migrate to display controller OF graph")
Reported-by: Evans Jahja <evansjahja13@...il.com>
Closes: https://lore.kernel.org/linux-mediatek/CAAq5pW9o3itC0G16LnJO7KMAQ_XoqXUpB=cuJ_7e3-H11zKd5Q@mail.gmail.com/
Tested-by: Chen-Yu Tsai <wenst@...omium.org>
Signed-off-by: Otto Pflüger <otto.pflueger@...cue.de>
---
Changes in v2:
- Change property order to follow device tree coding style
- Link to v1: https://lore.kernel.org/r/20251206-mt8183-display-graph-v1-1-a30e54481f28@abscue.de
---
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 146 ++++++++++++++++++++++++++-----
1 file changed, 122 insertions(+), 24 deletions(-)
diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index 4e20a8f2eb25803057955401a7737c7f029a1424..db86e2bd0c7bd61236a9eef16e803374810d3d1a 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -1755,14 +1755,22 @@ ports {
port@0 {
reg = <0>;
- ovl0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&mmsys_ep_main>;
};
};
port@1 {
reg = <1>;
- ovl0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&ovl_2l0_in>;
};
};
@@ -1784,14 +1792,22 @@ ports {
port@0 {
reg = <0>;
- ovl_2l0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl_2l0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&ovl0_out>;
};
};
port@1 {
reg = <1>;
- ovl_2l0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl_2l0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&rdma0_in>;
};
};
@@ -1813,14 +1829,22 @@ ports {
port@0 {
reg = <0>;
- ovl_2l1_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl_2l1_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&mmsys_ep_ext>;
};
};
port@1 {
reg = <1>;
- ovl_2l1_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ovl_2l1_out: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&rdma1_in>;
};
};
@@ -1843,14 +1867,22 @@ ports {
port@0 {
reg = <0>;
- rdma0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rdma0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&ovl_2l0_out>;
};
};
port@1 {
reg = <1>;
- rdma0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rdma0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&color0_in>;
};
};
@@ -1873,14 +1905,22 @@ ports {
port@0 {
reg = <0>;
- rdma1_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rdma1_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&ovl_2l1_out>;
};
};
port@1 {
reg = <1>;
- rdma1_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rdma1_out: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&dpi_in>;
};
};
@@ -1902,14 +1942,22 @@ ports {
port@0 {
reg = <0>;
- color0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ color0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&rdma0_out>;
};
};
port@1 {
reg = <1>;
- color0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ color0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&ccorr0_in>;
};
};
@@ -1930,14 +1978,22 @@ ports {
port@0 {
reg = <0>;
- ccorr0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ccorr0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&color0_out>;
};
};
port@1 {
reg = <1>;
- ccorr0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ccorr0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&aal0_in>;
};
};
@@ -1958,14 +2014,22 @@ ports {
port@0 {
reg = <0>;
- aal0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ aal0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&ccorr0_out>;
};
};
port@1 {
reg = <1>;
- aal0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ aal0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&gamma0_in>;
};
};
@@ -1986,14 +2050,22 @@ ports {
port@0 {
reg = <0>;
- gamma0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gamma0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&aal0_out>;
};
};
port@1 {
reg = <1>;
- gamma0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gamma0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&dither0_in>;
};
};
@@ -2014,14 +2086,22 @@ ports {
port@0 {
reg = <0>;
- dither0_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dither0_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&gamma0_out>;
};
};
port@1 {
reg = <1>;
- dither0_out: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dither0_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&dsi_in>;
};
};
@@ -2048,14 +2128,23 @@ ports {
port@0 {
reg = <0>;
- dsi_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dsi_in: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&dither0_out>;
};
};
port@1 {
reg = <1>;
- dsi_out: endpoint { };
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dsi_out: endpoint@0 {
+ reg = <0>;
+ };
};
};
};
@@ -2077,14 +2166,23 @@ ports {
port@0 {
reg = <0>;
- dpi_in: endpoint {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dpi_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&rdma1_out>;
};
};
port@1 {
reg = <1>;
- dpi_out: endpoint { };
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dpi_out: endpoint@1 {
+ reg = <1>;
+ };
};
};
};
---
base-commit: 6cd6c12031130a349a098dbeb19d8c3070d2dfbe
change-id: 20251206-mt8183-display-graph-506183c68b3b
Best regards,
--
Otto Pflüger <otto.pflueger@...cue.de>
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