06.03.2020 03:21, Derek Basehore пишет: > This adds the plumbing for reading panel rotation from the devicetree > and sets up adding a panel property for the panel orientation on > Mediatek SoCs when a rotation is present. Hello Derek and everyone, I'm looking at adding display rotation support to NVIDIA Tegra DRM driver because some devices have display panel physically mounted upside-down, and thus, display controller's scan-out needs to be rotated by 180° in this case. Derek, yours panel-rotation patches add support for assigning panel's orientation to the connector, but then only primary display plane receives rotation value in [1], while rotation needs to be applied to all available overlay/cursor planes and this should happen in other places than [1] as well. [1] drm_client_modeset_commit_atomic() Please also note that in a case of the scan-out rotation, plane's coordinates need to be changed in accordance to the display's rotation. I looked briefly through the DRM code and my understanding that the DRM core currently doesn't support use-case where scan-out needs to rotated based on a panel's orientation, correct? Is it the use-case you're working on for the Mediatek driver?
