drm/vc4: Add debugfs node that dumps the vc5 gamma PWL entries
This helps with debugging the conversion from a 256 point gamma LUT to 16 point PWL entries as used by the BCM2711. Co-developed-by:Juerg Haefliger <juergh@canonical.com> Signed-off-by:
Juerg Haefliger <juergh@canonical.com> Signed-off-by:
Dave Stevenson <dave.stevenson@raspberrypi.com> Signed-off-by:
Maxime Ripard <maxime@cerno.tech>
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