tree ff691ce78ea4e408ea1ac44cbde02164f8c1f095
parent 70ea005626a941923fece8fcfd471ea1ba295295
author Dave Stevenson <dave.stevenson@raspberrypi.com> 1643291476 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1645012464 +0100

drm/vc4: hdmi: Allow DBLCLK modes even if horz timing is odd.

[ Upstream commit 1d118965965f89948236ebe23072bb1fca5e7832 ]

The 2711 pixel valve can't produce odd horizontal timings, and
checks were added to vc4_hdmi_encoder_atomic_check and
vc4_hdmi_encoder_mode_valid to filter out/block selection of
such modes.

Modes with DRM_MODE_FLAG_DBLCLK double all the horizontal timing
values before programming them into the PV. The PV values,
therefore, can not be odd, and so the modes can be supported.

Amend the filtering appropriately.

Fixes: 57fb32e632be ("drm/vc4: hdmi: Block odd horizontal timings")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220127135116.298278-1-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@kernel.org>