linux-kernel - [PATCH v3 8/8] [HACK] arm64: dts: renesas: draak: Enable LVDS dual-link operation

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]

Date:   Wed, 28 Aug 2019 19:36:42 +0100
From:   Fabrizio Castro <fabrizio.castro@...renesas.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Fabrizio Castro <fabrizio.castro@...renesas.com>,
        Simon Horman <horms@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>, sam@...nborg.org
Subject: [PATCH v3 8/8] [HACK] arm64: dts: renesas: draak: Enable LVDS dual-link operation

Enable and connect the second LVDS encoder to the second LVDS input of
the THC63LVD1024 for dual-link LVDS operation. This requires changing
the default settings of SW45 and SW47 to OFF and ON respectively.

This patch is based on Laurent's dual-LVDS work:
https://patchwork.kernel.org/patch/10965045/

Signed-off-by: Fabrizio Castro <fabrizio.castro@...renesas.com>
---
v2->v3:
* new patch

Geert,

no need to review this patch unless they like the idea behind this
series.

Thanks,
Fab

---
 arch/arm64/boot/dts/renesas/r8a77995-draak.dts | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
index 67634cb..b4b8cde 100644
--- a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
@@ -77,11 +77,20 @@
 
 			port@0 {
 				reg = <0>;
-				thc63lvd1024_in: endpoint {
+				dual-lvds-even-pixels;
+				thc63lvd1024_in0: endpoint {
 					remote-endpoint = <&lvds0_out>;
 				};
 			};
 
+			port@1 {
+				reg = <1>;
+				dual-lvds-odd-pixels;
+				thc63lvd1024_in1: endpoint {
+					remote-endpoint = <&lvds1_out>;
+				};
+			};
+
 			port@2 {
 				reg = <2>;
 				thc63lvd1024_out: endpoint {
@@ -368,24 +377,27 @@
 	ports {
 		port@1 {
 			lvds0_out: endpoint {
-				remote-endpoint = <&thc63lvd1024_in>;
+				remote-endpoint = <&thc63lvd1024_in0>;
 			};
 		};
 	};
 };
 
 &lvds1 {
-	/*
-	 * Even though the LVDS1 output is not connected, the encoder must be
-	 * enabled to supply a pixel clock to the DU for the DPAD output when
-	 * LVDS0 is in use.
-	 */
 	status = "okay";
 
 	clocks = <&cpg CPG_MOD 727>,
 		 <&x12_clk>,
 		 <&extal_clk>;
 	clock-names = "fck", "dclkin.0", "extal";
+
+	ports {
+		port@1 {
+			lvds1_out: endpoint {
+				remote-endpoint = <&thc63lvd1024_in1>;
+			};
+		};
+	};
 };
 
 &ohci0 {
-- 
2.7.4