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overlays: vc4-kms-v3d-pi5 parameter "composite" no longer disables HDMI

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Previously, if an HDMI display was connected at boot time when composite
was enabled, the firmware FB would get "stuck" and a login console would
not appear on either HDMI or composite.

With the change, a console will now appear, typically (invariably?) on
HDMI (just as happens with HDMI + DPI). This may be helpful when booting
to CLI when composite was enabled accidentally and cannot be viewed.

The old behaviour can be reinstated by adding the "nohdmi" option.

Signed-off-by: Nick Hollinghurst <nick.hollinghurst@raspberrypi.com>
This commit is contained in:
Nick Hollinghurst
2025-11-19 17:51:59 +00:00
committed by Phil Elwell
parent 427d4259e9
commit c7ae6f1746
2 changed files with 3 additions and 9 deletions
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4
arch/arm/boot/dts/overlays/README
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@@ -5827,8 +5827,8 @@ Params: cma-512 CMA is 512MB
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)
composite Enable the composite output (default "off")
N.B. Disables all other outputs on a Pi 4.
nohdmi Disable both HDMI 0 & 1 outputs
nohdmi0 Disable HDMI 0 output
nohdmi1 Disable HDMI 1 output

8
arch/arm/boot/dts/overlays/vc4-kms-v3d-pi5-overlay.dts
View File

@@ -134,13 +134,7 @@
audio = <0>,"!14";
audio1 = <0>,"!15";
noaudio = <0>,"=14", <0>,"=15";
composite = <0>, "!3",
<0>, "!4",
<0>, "!5",
<0>, "!6",
<0>, "!10",
<0>, "!11",
<&frag13>, "status";
composite = <&frag13>, "status";
nohdmi0 = <0>, "-3-5-10";
nohdmi1 = <0>, "-4-6-11";
nohdmi = <0>, "-3-4-5-6-10-11";