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
22 struct rcar_du_group;
23 struct 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 */
46 struct 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 */
85 struct 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
94 enum 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
105 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
106 unsigned int hwindex);
107
108 void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
109
110 void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set);
111
112 #endif /* __RCAR_DU_CRTC_H__ */