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From 418ca5973ad807f9d7f99e68af2bd21c7e8baa4d Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 31 Jul 2019 17:39:37 +0100
Subject: [PATCH] overlays: Add audio parameter to vc4-kms-v3d
The audio parameter to the vc4-kms-v3d overlay allows audio support
to be disabled (it defaults to on) by adding "audio=off" to the
dtoverlay parameters.
See: https://github.com/raspberrypi/linux/issues/2489
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/README | 1 +
arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 8 ++++++++
2 files changed, 9 insertions(+)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2480,6 +2480,7 @@ Params: cma-256 CMA is 2
cma-128 CMA is 128MB
cma-96 CMA is 96MB
cma-64 CMA is 64MB
+ audio Enable or disable audio over HDMI (default "on")
Name: vga666
--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
@@ -134,11 +134,19 @@
};
};
+ fragment@17 {
+ target = <&hdmi>;
+ __dormant__ {
+ dmas;
+ };
+ };
+
__overrides__ {
cma-256 = <0>,"+0-1-2-3-4";
cma-192 = <0>,"-0+1-2-3-4";
cma-128 = <0>,"-0-1+2-3-4";
cma-96 = <0>,"-0-1-2+3-4";
cma-64 = <0>,"-0-1-2-3+4";
+ audio = <0>,"!17";
};
};
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