Display output does not work when connecting an AM625 BeaglePlay board to a DVI monitor, because the DRM it66121 bridge driver assumes that the sink type is always HDMI. This patch series fixes the issue.
Patch #1 reworks the driver to use the HDMI helpers instead of open coding the AVI infoframes buffer management. Patch #2 moves the .mode_set logic to the .atomic_enable handler. Patch #3 finally fixes the mentioned issue by using the display information to determine whether HDMI or DVI mode should be set. This is a v4 of the series, that addresses issues pointed out by Maxime. The patches were tested on both DVI and an HDMI monitors. Changes in v4: - Convert the driver to use the HDMI helpers (Maxime Ripard). - Move .mode_set logic to .atomic_enable (Maxime Ripard). Changes in v3: - Move the HDMI/DVI mode set to the .atomic_enable handler (Maxime Ripard). Changes in v2: - Don't store the sink type in a per-commit bridge state (Maxime Ripard). Javier Martinez Canillas (3): drm/bridge: ite-it66121: Switch to the HDMI connector helpers drm/bridge: ite-it66121: Move logic .mode_set setup to .atomic_enable drm/bridge: ite-it66121: Select HDMI or DVI mode based on sink type drivers/gpu/drm/bridge/Kconfig | 2 + drivers/gpu/drm/bridge/ite-it66121.c | 198 ++++++++++++++++----------- 2 files changed, 121 insertions(+), 79 deletions(-) -- 2.54.0 base-commit: 4c26e162947f91aa78ba57dd4fddd38fc80e7d60 branch: it66121-fix-dvi-mode-v4
