Some drivers, eg. mtk_drm and msm_drm, rely on the panel to set the orientation. Panel calls drm_connector_set_panel_orientation() to create orientation property and sets the value. However, connector properties can't be created after drm_dev_register() is called. The goal is to separate the orientation property creation, so drm drivers can create it earlier before drm_dev_register().
After this series, drm_connector_set_panel_orientation() works like before. It won't affect existing callers of drm_connector_set_panel_orientation(). The only difference is that some drm drivers can call drm_connector_init_panel_orientation_property() earlier.
Hsin-Yi Wang (4): gpu: drm: separate panel orientation property creating and value setting drm/mediatek: init panel orientation property drm/msm: init panel orientation property arm64: dts: mt8183: Add panel rotation
.../arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 + drivers/gpu/drm/drm_connector.c | 58 ++++++++++++++----- drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++ drivers/gpu/drm/msm/dsi/dsi_manager.c | 4 ++ include/drm/drm_connector.h | 2 + 5 files changed, 59 insertions(+), 13 deletions(-)