drm/vc4: hdmi: Disable Wifi Frequencies

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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>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201029134018.1948636-2-maxime@cerno.tech

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Maxime Ripard 2020-10-29 14:40:17 +01:00

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commit 9fa1d7e60a

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21

drivers/gpu/drm/vc4/vc4_hdmi.c

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8

drivers/gpu/drm/vc4/vc4_hdmi.h

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