drm/vc4: hdmi: Check and warn if we can't reach 4kp60 frequencies

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In order to reach the frequencies needed to output at 594MHz, the
firmware needs to be configured with the appropriate parameters in the
config.txt file (enable_hdmi_4kp60 and force_turbo).

Let's detect it at bind time, warn the user if we can't, and filter out
the relevant modes.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210507150515.257424-10-maxime@cerno.tech

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Maxime Ripard 2021-05-07 17:05:12 +02:00

parent 7d9061e097

commit 86e3a65fdb

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31

drivers/gpu/drm/vc4/vc4_hdmi.c

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8

drivers/gpu/drm/vc4/vc4_hdmi.h

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