1/* SPDX-License-Identifier: GPL-2.0+ */
  2/*
  3 * rcar_du_crtc.h  --  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 * @vsp: VSP feeding video to this CRTC
 43 * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
 44 * @writeback: the writeback connector
 45 */
 46struct rcar_du_crtc {
 47	struct drm_crtc crtc;
 48
 49	struct rcar_du_device *dev;
 50	struct clk *clock;
 51	struct clk *extclock;
 52	unsigned int mmio_offset;
 53	unsigned int index;
 54	bool initialized;
 55
 56	u32 dsysr;
 57
 58	bool vblank_enable;
 59	struct drm_pending_vblank_event *event;
 60	wait_queue_head_t flip_wait;
 61
 62	spinlock_t vblank_lock;
 63	wait_queue_head_t vblank_wait;
 64	unsigned int vblank_count;
 65
 66	struct rcar_du_group *group;
 67	struct rcar_du_vsp *vsp;
 68	unsigned int vsp_pipe;
 69
 70	const char *const *sources;
 71	unsigned int sources_count;
 72
 73	struct drm_writeback_connector writeback;
 74};
 75
 76#define to_rcar_crtc(c)		container_of(c, struct rcar_du_crtc, crtc)
 77#define wb_to_rcar_crtc(c)	container_of(c, struct rcar_du_crtc, writeback)
 78
 79/**
 80 * struct rcar_du_crtc_state - Driver-specific CRTC state
 81 * @state: base DRM CRTC state
 82 * @crc: CRC computation configuration
 83 * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
 84 */
 85struct rcar_du_crtc_state {
 86	struct drm_crtc_state state;
 87
 88	struct vsp1_du_crc_config crc;
 89	unsigned int outputs;
 90};
 91
 92#define to_rcar_crtc_state(s) container_of(s, struct rcar_du_crtc_state, state)
 93
 94enum rcar_du_output {
 95	RCAR_DU_OUTPUT_DPAD0,
 96	RCAR_DU_OUTPUT_DPAD1,
 97	RCAR_DU_OUTPUT_LVDS0,
 98	RCAR_DU_OUTPUT_LVDS1,
 99	RCAR_DU_OUTPUT_HDMI0,
100	RCAR_DU_OUTPUT_HDMI1,
101	RCAR_DU_OUTPUT_TCON,
102	RCAR_DU_OUTPUT_MAX,
103};
104
105int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
106			unsigned int hwindex);
107
108void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
109
110void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set);
111
112#endif /* __RCAR_DU_CRTC_H__ */