drm: rcar-du: Document the rcar_du_crtc structure
Document the structure fields using kerneldoc. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
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struct rcar_du_group;
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/**
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* struct rcar_du_crtc - the CRTC, representing a DU superposition processor
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* @crtc: base DRM CRTC
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* @clock: the CRTC functional clock
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* @extclock: external pixel dot clock (optional)
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* @mmio_offset: offset of the CRTC registers in the DU MMIO block
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* @index: CRTC software and hardware index
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* @started: whether the CRTC has been started and is running
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* @event: event to post when the pending page flip completes
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* @flip_wait: wait queue used to signal page flip completion
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* @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
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* @enabled: whether the CRTC is enabled, used to control system resume
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* @group: CRTC group this CRTC belongs to
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*/
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struct rcar_du_crtc {
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struct drm_crtc crtc;
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