fix for rpi4 display interfering with certain 2.4ghz wifi freqencies
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From 358afb8b746d4a7ebaeeeaab7a1523895a8572c2 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Thu, 29 Oct 2020 14:40:18 +0100
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Subject: ARM: dts: rpi-4: disable wifi frequencies
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The RPi4 WiFi chip and HDMI outputs have some frequency overlap with
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crosstalk around 2.4GHz. Let's mark it as such so we can use some evasive
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maneuvers.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Link: https://lore.kernel.org/r/20201029134018.1948636-3-maxime@cerno.tech
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---
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arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
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index 09a1182c29363..403bacf986ebb 100644
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--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
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+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
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@@ -181,12 +181,14 @@
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&hdmi0 {
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clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 0>, <&clk_27MHz>;
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clock-names = "hdmi", "bvb", "audio", "cec";
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+ wifi-2.4ghz-coexistence;
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status = "okay";
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};
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&hdmi1 {
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clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 1>, <&clk_27MHz>;
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clock-names = "hdmi", "bvb", "audio", "cec";
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+ wifi-2.4ghz-coexistence;
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status = "okay";
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};
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--
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cgit 1.2.3-1.el7
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@ -849,6 +849,9 @@ Patch103: arm-pandaboard-fix-add-bluetooth.patch
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# Fix for USB on some newer RPi4 / firmware combinations
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# Fix for USB on some newer RPi4 / firmware combinations
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Patch104: 0001-brcm-rpi4-fix-usb-numeration.patch
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Patch104: 0001-brcm-rpi4-fix-usb-numeration.patch
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# RPi-4 and wifi issues
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Patch105: arm-dts-rpi-4-disable-wifi-frequencies.patch
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# Nouveau mDP detection fix
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# Nouveau mDP detection fix
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Patch107: 0001-drm-nouveau-kms-handle-mDP-connectors.patch
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Patch107: 0001-drm-nouveau-kms-handle-mDP-connectors.patch
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