diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0933-dts-bcm2711-Disable-DVP-by-default.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0933-dts-bcm2711-Disable-DVP-by-default.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0933-dts-bcm2711-Disable-DVP-by-default.patch b/target/linux/bcm27xx/patches-5.4/950-0933-dts-bcm2711-Disable-DVP-by-default.patch new file mode 100644 index 0000000000..9e4612e871 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0933-dts-bcm2711-Disable-DVP-by-default.patch @@ -0,0 +1,44 @@ +From c74f523a5af1d9d3a6f9aee05585e52a78a79f53 Mon Sep 17 00:00:00 2001 +From: Tim Gover <tim.gover@raspberrypi.com> +Date: Fri, 7 Aug 2020 13:55:18 +0100 +Subject: [PATCH] dts: bcm2711: Disable DVP by default + +The HDMI DVP should be disabled by default as is the case for other +display related drivers. This changes resolves an issue when using +the legacy firmware display driver where the DVP caused the 108 MHz +clock in HDMI TX to be gated off when Linux started. This effectively +stopped the firmware from being able to change the HDMI analog PHY +registers. + +Add a fragment to re-enable this in vc4-kms-v3d-pi4-overlay +--- + arch/arm/boot/dts/bcm2711-rpi.dtsi | 1 + + arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts | 7 +++++++ + 2 files changed, 8 insertions(+) + +--- a/arch/arm/boot/dts/bcm2711-rpi.dtsi ++++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi +@@ -46,6 +46,7 @@ + clocks = <&clk_108MHz>; + #clock-cells = <1>; + #reset-cells = <1>; ++ status = "disabled"; + }; + + hdmi0: hdmi@7ef00700 { +--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts ++++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts +@@ -145,6 +145,13 @@ + }; + }; + ++ fragment@20 { ++ target = <&dvp>; ++ __overlay__ { ++ status = "okay"; ++ }; ++ }; ++ + __overrides__ { + audio = <0>,"!17"; + audio1 = <0>,"!18"; |