Hi Rob, On Tue, Sep 29, 2020 at 02:00:55PM -0500, Rob Herring wrote: > On Fri, Sep 25, 2020 at 03:07:43PM +0200, Maxime Ripard wrote: > > There's cross-talk on the RPi4 between the 2.4GHz channels used by the WiFi > > chip and some resolutions, most notably 1440p at 60Hz. > > > > In such a case, we can either reject entirely the mode, or lower slightly > > the pixel frequency to remove the overlap. Let's go for the latter. > > > > Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> > > --- > > .../bindings/display/brcm,bcm2711-hdmi.yaml | 6 ++++++ > > drivers/gpu/drm/vc4/vc4_hdmi.c | 14 +++++++++++++- > > drivers/gpu/drm/vc4/vc4_hdmi.h | 8 ++++++++ > > 3 files changed, 27 insertions(+), 1 deletion(-) > > > > diff --git a/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml b/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > index 03a76729d26c..63e7fe999c0a 100644 > > --- a/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > +++ b/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > @@ -76,6 +76,12 @@ properties: > > resets: > > maxItems: 1 > > > > + raspberrypi,disable-wifi-frequencies: > > + type: boolean > > + description: > > > + Should the pixel frequencies in the WiFi frequencies range be > > + avoided? > > Based on googling the issue, perhaps should be a common property? This is a fairly generic issue indeed, but went for the most non-intrusive way. Do you have a better idea of a generic name, or do you just want me to drop the vendor prefix? Maxime
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