[PATCH 6.19 02/18] arm64: dts: mediatek: mt8183: Add missing endpoint IDs to display graph

Greg Kroah-Hartman
2026-02-17T20:49:43Z

From: Otto Pflüger <otto.pflueger@abscue.de>

commit be0b304eeb8c5f77e4f98f64e58729d879195f2f upstream.

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@gmail.com>
Closes: https://lore.kernel.org/linux-mediatek/CAAq5pW9o3itC0G16LnJO7KMAQ_XoqXUpB=cuJ_7e3-H11zKd5Q@mail.gmail.com/
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
[Angelo: Fixed dtbs_check issues]
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 37 +++++++++++++++++++++++++------
1 file changed, 31 insertions(+), 6 deletions(-)

--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -1812,15 +1812,23 @@
#size-cells = <0>;

port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <0>;
- ovl_2l1_in: endpoint {
+
+ ovl_2l1_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&mmsys_ep_ext>;
};
};

port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <1>;
- ovl_2l1_out: endpoint {
+
+ ovl_2l1_out: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&rdma1_in>;
};
};
@@ -1872,15 +1880,23 @@
#size-cells = <0>;

port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <0>;
- rdma1_in: endpoint {
+
+ rdma1_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&ovl_2l1_out>;
};
};

port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <1>;
- rdma1_out: endpoint {
+
+ rdma1_out: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&dpi_in>;
};
};
@@ -2076,15 +2092,24 @@
#size-cells = <0>;

port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <0>;
- dpi_in: endpoint {
+
+ dpi_in: endpoint@1 {
+ reg = <1>;
remote-endpoint = <&rdma1_out>;
};
};

port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <1>;
- dpi_out: endpoint { };
+
+ dpi_out: endpoint@1 {
+ reg = <1>;
+ };
};
};
};