drm: rcar-du: Clip planes to screen boundaries
Unlike the KMS API, the hardware doesn't support planes exceeding the
screen boundaries or planes being located fully off-screen. We need to
clip plane coordinates to support the use case.
Fortunately the DRM core offers a drm_atomic_helper_check_plane_state()
helper that valides the scaling factor and clips the plane coordinates.
Use it to implement the plane atomic check and use the clipped source
and destination rectangles from the plane state instead of the unclipped
source and CRTC coordinates to configure the device.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v2:
- Actually use the clipped source and destination rectangles
- Use drm_crtc_state::mode instead of drm_crtc_state::adjusted_mode
where applicable
- Removed spurious semicolon
- Rebased on top of latest drm+drm-misc
3 files changed
