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* rcar_du_crtc.h -- R-Car Display Unit CRTCs
* Copyright (C) 2013-2015 Renesas Electronics Corporation
* Contact: Laurent Pinchart (
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
#ifndef __RCAR_DU_CRTC_H__
#define __RCAR_DU_CRTC_H__
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
struct rcar_du_group;
struct rcar_du_vsp;
* struct rcar_du_crtc - the CRTC, representing a DU superposition processor
* @crtc: base DRM CRTC
* @clock: the CRTC functional clock
* @extclock: external pixel dot clock (optional)
* @mmio_offset: offset of the CRTC registers in the DU MMIO block
* @index: CRTC software and hardware index
* @initialized: whether the CRTC has been initialized and clocks enabled
* @vblank_enable: whether vblank events are enabled on this CRTC
* @event: event to post when the pending page flip completes
* @flip_wait: wait queue used to signal page flip completion
* @vblank_lock: protects vblank_wait and vblank_count
* @vblank_wait: wait queue used to signal vertical blanking
* @vblank_count: number of vertical blanking interrupts to wait for
* @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
* @group: CRTC group this CRTC belongs to
* @vsp: VSP feeding video to this CRTC
* @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
struct rcar_du_crtc {
struct drm_crtc crtc;
struct clk *clock;
struct clk *extclock;
unsigned int mmio_offset;
unsigned int index;
bool initialized;
bool vblank_enable;
struct drm_pending_vblank_event *event;
wait_queue_head_t flip_wait;
spinlock_t vblank_lock;
wait_queue_head_t vblank_wait;
unsigned int vblank_count;
unsigned int outputs;
struct rcar_du_group *group;
struct rcar_du_vsp *vsp;
unsigned int vsp_pipe;
#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
enum rcar_du_output {
int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
void rcar_du_crtc_route_output(struct drm_crtc *crtc,
enum rcar_du_output output);
void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
#endif /* __RCAR_DU_CRTC_H__ */