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1/*
2 * rcar_du_crtc.h -- R-Car Display Unit CRTCs
3 *
4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#ifndef __RCAR_DU_CRTC_H__
15#define __RCAR_DU_CRTC_H__
16
17#include <linux/mutex.h>
18#include <linux/spinlock.h>
19#include <linux/wait.h>
20
21#include <drm/drmP.h>
22#include <drm/drm_crtc.h>
23
24struct rcar_du_group;
25struct rcar_du_vsp;
26
27/**
28 * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
29 * @crtc: base DRM CRTC
30 * @clock: the CRTC functional clock
31 * @extclock: external pixel dot clock (optional)
32 * @mmio_offset: offset of the CRTC registers in the DU MMIO block
33 * @index: CRTC software and hardware index
34 * @initialized: whether the CRTC has been initialized and clocks enabled
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 * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
42 * @group: CRTC group this CRTC belongs to
43 * @vsp: VSP feeding video to this CRTC
44 * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
45 */
46struct rcar_du_crtc {
47 struct drm_crtc crtc;
48
49 struct clk *clock;
50 struct clk *extclock;
51 unsigned int mmio_offset;
52 unsigned int index;
53 bool initialized;
54
55 bool vblank_enable;
56 struct drm_pending_vblank_event *event;
57 wait_queue_head_t flip_wait;
58
59 spinlock_t vblank_lock;
60 wait_queue_head_t vblank_wait;
61 unsigned int vblank_count;
62
63 unsigned int outputs;
64
65 struct rcar_du_group *group;
66 struct rcar_du_vsp *vsp;
67 unsigned int vsp_pipe;
68};
69
70#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
71
72enum rcar_du_output {
73 RCAR_DU_OUTPUT_DPAD0,
74 RCAR_DU_OUTPUT_DPAD1,
75 RCAR_DU_OUTPUT_LVDS0,
76 RCAR_DU_OUTPUT_LVDS1,
77 RCAR_DU_OUTPUT_HDMI0,
78 RCAR_DU_OUTPUT_HDMI1,
79 RCAR_DU_OUTPUT_TCON,
80 RCAR_DU_OUTPUT_MAX,
81};
82
83int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
84void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
85void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
86
87void rcar_du_crtc_route_output(struct drm_crtc *crtc,
88 enum rcar_du_output output);
89void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
90
91#endif /* __RCAR_DU_CRTC_H__ */