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@cerno.tech
.../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 beavoided?
Based on googling the issue, perhaps should be a common property?