1/* SPDX-License-Identifier: GPL-2.0+ */
  2/*
  3 * R-Car Display Unit CRTCs
  4 *
  5 * Copyright (C) 2013-2015 Renesas Electronics Corporation
  6 *
  7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
  8 */
  9
 10#ifndef __RCAR_DU_CRTC_H__
 11#define __RCAR_DU_CRTC_H__
 12
 13#include <linux/mutex.h>
 14#include <linux/spinlock.h>
 15#include <linux/wait.h>
 16
 17#include <drm/drm_crtc.h>
 18#include <drm/drm_writeback.h>
 19
 20#include <media/vsp1.h>
 21
 22struct rcar_du_group;
 23struct rcar_du_vsp;
 24
 25/**
 26 * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
 27 * @crtc: base DRM CRTC
 28 * @dev: the DU device
 29 * @clock: the CRTC functional clock
 30 * @extclock: external pixel dot clock (optional)
 31 * @mmio_offset: offset of the CRTC registers in the DU MMIO block
 32 * @index: CRTC hardware index
 33 * @initialized: whether the CRTC has been initialized and clocks enabled
 34 * @dsysr: cached value of the DSYSR register
 35 * @vblank_enable: whether vblank events are enabled on this CRTC
 36 * @event: event to post when the pending page flip completes
 37 * @flip_wait: wait queue used to signal page flip completion
 38 * @vblank_lock: protects vblank_wait and vblank_count
 39 * @vblank_wait: wait queue used to signal vertical blanking
 40 * @vblank_count: number of vertical blanking interrupts to wait for
 41 * @group: CRTC group this CRTC belongs to
 42 * @cmm: CMM associated with this CRTC
 43 * @vsp: VSP feeding video to this CRTC
 44 * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
 45 * @writeback: the writeback connector
 46 */
 47struct rcar_du_crtc {
 48	struct drm_crtc crtc;
 49
 50	struct rcar_du_device *dev;
 51	struct clk *clock;
 52	struct clk *extclock;
 53	unsigned int mmio_offset;
 54	unsigned int index;
 55	bool initialized;
 56
 57	u32 dsysr;
 58
 59	bool vblank_enable;
 60	struct drm_pending_vblank_event *event;
 61	wait_queue_head_t flip_wait;
 62
 63	spinlock_t vblank_lock;
 64	wait_queue_head_t vblank_wait;
 65	unsigned int vblank_count;
 66
 67	struct rcar_du_group *group;
 68	struct platform_device *cmm;
 69	struct rcar_du_vsp *vsp;
 70	unsigned int vsp_pipe;
 71
 72	const char *const *sources;
 73	unsigned int sources_count;
 74
 75	struct drm_writeback_connector writeback;
 76};
 77
 78#define to_rcar_crtc(c)		container_of(c, struct rcar_du_crtc, crtc)
 79#define wb_to_rcar_crtc(c)	container_of(c, struct rcar_du_crtc, writeback)
 80
 81/**
 82 * struct rcar_du_crtc_state - Driver-specific CRTC state
 83 * @state: base DRM CRTC state
 84 * @crc: CRC computation configuration
 85 * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
 86 */
 87struct rcar_du_crtc_state {
 88	struct drm_crtc_state state;
 89
 90	struct vsp1_du_crc_config crc;
 91	unsigned int outputs;
 92};
 93
 94#define to_rcar_crtc_state(s) container_of(s, struct rcar_du_crtc_state, state)
 95
 96int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
 97			unsigned int hwindex);
 98
 99void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
100
101void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set);
102
103#endif /* __RCAR_DU_CRTC_H__ */