drm/irq: Add drm_crtc_send_vblank_event()
This function is the KMS native variant of drm_send_vblank_event(). It takes a struct drm_crtc * instead of a struct drm_device * and an index of the CRTC. Eventually the goal is to access vblank data through the CRTC only so that the per-CRTC data can be moved to struct drm_crtc. Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: NThierry Reding <treding@nvidia.com>
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