diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0544-ARM-dts-vc4-kms-v3d-Always-disable-firmware-HDMI.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0544-ARM-dts-vc4-kms-v3d-Always-disable-firmware-HDMI.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0544-ARM-dts-vc4-kms-v3d-Always-disable-firmware-HDMI.patch b/target/linux/bcm27xx/patches-5.15/950-0544-ARM-dts-vc4-kms-v3d-Always-disable-firmware-HDMI.patch new file mode 100644 index 0000000000..3a50706686 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0544-ARM-dts-vc4-kms-v3d-Always-disable-firmware-HDMI.patch @@ -0,0 +1,47 @@ +From 3942525ae16ac52fe8b632a3d3fb34af9f0d5c5e Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Mon, 25 Oct 2021 11:48:18 +0100 +Subject: [PATCH] ARM: dts: vc4-kms-v3d: Always disable firmware HDMI + +Both the firmware audio driver and the vc4-kms-v3d driver are capable +of providing HDMI audio, but only one should be active at any time. +The vc4-kms-v3d overlays disable the firmware audio driver, but they +also have a noaudio parameter that as well as disabling the ARM-side +HDMI audio also re-enables the firmware HDMI audio. This is not +guaranteed to work and has been seen to break the display completely. + +Modify the noaudio parameters so that the firmware HDMI audio support +remains disabled. + +See: https://github.com/raspberrypi/linux/issues/4651 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 4 ++-- + arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts | 2 +- + 2 files changed, 3 insertions(+), 3 deletions(-) + +--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts ++++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts +@@ -116,8 +116,8 @@ + }; + + __overrides__ { +- audio = <0>,"!13", <0>,"=14"; +- noaudio = <0>,"=13", <0>,"!14"; ++ audio = <0>,"!13"; ++ noaudio = <0>,"=13"; + nocomposite = <0>, "!11"; + }; + }; +--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts ++++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts +@@ -180,7 +180,7 @@ + __overrides__ { + audio = <0>,"!17"; + audio1 = <0>,"!18"; +- noaudio = <0>,"=17", <0>,"=18", <0>,"!19"; ++ noaudio = <0>,"=17", <0>,"=18"; + composite = <0>, "!1", + <0>, "!2", + <0>, "!3", |