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dt-bindings: display: Add a property to deal with WiFi coexistence 

The RaspberryPi4 has both a WiFi chip and HDMI outputs capable of doing
4k. Unfortunately, the 1440p resolution at 60Hz has a TMDS rate on the
HDMI cable right in the middle of the first Wifi channel.

Add a property to our HDMI controller, that could be reused by other
similar HDMI controllers, to allow the OS to take whatever measure is
necessary to avoid that crosstalk.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201029134018.1948636-1-maxime@cerno.tech
This commit is contained in:
Maxime Ripard 2020-10-29 14:40:16 +01:00
parent b5dbc4d368
commit 8d15aa4ed0
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Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml
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@ -76,6 +76,12 @@ properties:
resets:
maxItems: 1
wifi-2.4ghz-coexistence:
type: boolean
description: >
Should the pixel frequencies in the WiFi frequencies range be
avoided?
required:
- compatible
- reg