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93 lines
2.9 KiB
Diff
93 lines
2.9 KiB
Diff
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From 744543757bef8621f7791e28ecb894b2627cb449 Mon Sep 17 00:00:00 2001
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From: Hristo Venev <hristo@venev.name>
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Date: Fri, 5 Jun 2020 09:22:49 +0000
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Subject: [PATCH] snd_bcm2835: disable HDMI audio when vc4 is used
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(#3640)
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Things don't work too well when both the vc4 driver and the firmware
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driver are trying to control the same audio output:
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[ 763.569406] bcm2835_audio bcm2835_audio: vchi message timeout, msg=5
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Hence, when the vc4 HDMI driver is used, let it control audio. This is done
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by introducing a new device tree property to the audio node, and
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extending the vc4-kms-v3d overlays to set it appropriately.
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Signed-off-by: Hristo Venev <hristo@venev.name>
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---
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arch/arm/boot/dts/overlays/README | 2 ++
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arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 10 +++++++++-
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arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts | 8 ++++++++
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drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 4 +++-
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4 files changed, 22 insertions(+), 2 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -2745,6 +2745,7 @@ Params: cma-256 CMA is 2
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cma-size CMA size in bytes, 4MB aligned
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cma-default Use upstream's default value
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audio Enable or disable audio over HDMI (default "on")
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+ noaudio Disable all HDMI audio (default "off")
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Name: vc4-kms-v3d-pi4
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@@ -2761,6 +2762,7 @@ Params: cma-256 CMA is 2
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"on")
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audio1 Enable or disable audio over HDMI1 (default
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"on")
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+ noaudio Disable all HDMI audio (default "off")
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Name: vga666
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--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
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@@ -108,7 +108,15 @@
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};
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};
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+ fragment@14 {
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+ target = <&audio>;
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+ __overlay__ {
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+ brcm,disable-hdmi;
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+ };
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+ };
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+
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__overrides__ {
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- audio = <0>,"!13";
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+ audio = <0>,"!13", <0>,"=14";
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+ noaudio = <0>,"=13", <0>,"!14";
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};
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};
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--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
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@@ -138,8 +138,16 @@
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};
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};
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+ fragment@19 {
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+ target = <&audio>;
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+ __overlay__ {
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+ brcm,disable-hdmi;
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+ };
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+ };
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+
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__overrides__ {
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audio = <0>,"!17";
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audio1 = <0>,"!18";
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+ noaudio = <0>,"=17", <0>,"=18", <0>,"!19";
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};
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};
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--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
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+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
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@@ -381,7 +381,9 @@ static int snd_bcm2835_alsa_probe(struct
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}
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if (!enable_compat_alsa) {
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- set_hdmi_enables(dev);
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+ if (!of_property_read_bool(dev->of_node, "brcm,disable-hdmi"))
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+ set_hdmi_enables(dev);
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+
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// In this mode, always enable analog output
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enable_headphones = true;
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} else {
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