linux-kernel - [PATCH v3] arm64: dts: mt8173: Fix elm panel DT node

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Date:   Tue, 21 Jun 2022 17:18:54 +0800
From:   Pin-Yen Lin <treapking@...omium.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Hsin-Yi Wang <hsinyi@...omium.org>,
        Eizan Miyamoto <eizan@...omium.org>,
        Pin-Yen Lin <treapking@...omium.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: [PATCH v3] arm64: dts: mt8173: Fix elm panel DT node

Move the panel DT node under `aux-bus` node, so it won't use the buggy
`ps8640_bridge_get_edid` to get the display modes. Also, change the
compatible string from "lg,lp120up1" to "edp-panel", so the panel-edp
driver gets the displays modes from the EDID instead of using the
predefined display mode (`lg_lp129qe_mode`) in the driver, which is
actually not working.

Signed-off-by: Pin-Yen Lin <treapking@...omium.org>
---

Changes in v3:
- Include more details in the commit message.

Changes in v2:
- Remove the Fixes tag because this change is not compatible with the
  old kernel versions.

 arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi | 26 +++++++++++---------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
index 9c75fbb31f98..1e0802a6f6d2 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
@@ -90,18 +90,6 @@ volume_up {
 		};
 	};
 
-	panel: panel {
-		compatible = "lg,lp120up1";
-		power-supply = <&panel_fixed_3v3>;
-		backlight = <&backlight>;
-
-		port {
-			panel_in: endpoint {
-				remote-endpoint = <&ps8640_out>;
-			};
-		};
-	};
-
 	panel_fixed_3v3: regulator1 {
 		compatible = "regulator-fixed";
 		regulator-name = "PANEL_3V3";
@@ -282,6 +270,20 @@ ps8640_out: endpoint {
 				};
 			};
 		};
+
+		aux-bus {
+			panel {
+				compatible = "edp-panel";
+				power-supply = <&panel_fixed_3v3>;
+				backlight = <&backlight>;
+
+				port {
+					panel_in: endpoint {
+						remote-endpoint = <&ps8640_out>;
+					};
+				};
+			};
+		};
 	};
 };
 
-- 
2.37.0.rc0.104.g0611611a94-goog