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From bbced22ee3d4c08612bbc35c860d2274e85d5a51 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 27 Aug 2020 18:57:26 +0100
Subject: [PATCH] overlays: Add option for composite to
vc4-kms-v3d-pi4.
Composite is an alternative to HDMI/DPI/DSI on Pi4 as it
requires very particular clock setups.
Add an option to vc4-kms-v3d-pi4 to enable composite and
disable all other graphics outputs.
NB This must be used in conjunction with enable_tvout=1
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
arch/arm/boot/dts/overlays/README | 2 ++
.../dts/overlays/vc4-kms-v3d-pi4-overlay.dts | 26 +++++++++++++++++++
2 files changed, 28 insertions(+)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2924,6 +2924,8 @@ Params: cma-256 CMA is 2
audio1 Enable or disable audio over HDMI1 (default
"on")
noaudio Disable all HDMI audio (default "off")
+ composite Enable the composite output (disables all other
+ outputs)
Name: vga666
--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
@@ -152,9 +152,35 @@
};
};
+ fragment@21 {
+ target = <&pixelvalve3>;
+ __dormant__ {
+ status = "okay";
+ };
+ };
+
+ fragment@22 {
+ target = <&vec>;
+ __dormant__ {
+ status = "okay";
+ };
+ };
+
__overrides__ {
audio = <0>,"!17";
audio1 = <0>,"!18";
noaudio = <0>,"=17", <0>,"=18", <0>,"!19";
+ composite = <0>, "!1",
+ <0>, "!2",
+ <0>, "!3",
+ <0>, "!4",
+ <0>, "!6",
+ <0>, "!7",
+ <0>, "!8",
+ <0>, "!9",
+ <0>, "!10",
+ <0>, "!16",
+ <0>, "=21",
+ <0>, "=22";
};
};
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