[PATCH v4 0/3] drm/bridge: ite-it66121: Fix display output for DVI monitors

[Javier Martinez Canillas <javierm@redhat.com>]

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