aboutsummaryrefslogtreecommitdiff
path: root/include/backend/drm/drm.h
blob: 4b75b8a4698cda432a4674fa39edf3d7c39119c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
#ifndef BACKEND_DRM_DRM_H
#define BACKEND_DRM_DRM_H

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <wayland-server-core.h>
#include <wayland-util.h>
#include <wlr/backend/drm.h>
#include <wlr/backend/session.h>
#include <wlr/render/drm_format_set.h>
#include <wlr/types/wlr_output_layer.h>
#include <xf86drmMode.h>
#include "backend/drm/iface.h"
#include "backend/drm/properties.h"
#include "backend/drm/renderer.h"

struct wlr_drm_plane {
	uint32_t type;
	uint32_t id;

	/* Only initialized on multi-GPU setups */
	struct wlr_drm_surface mgpu_surf;

	/* Buffer submitted to the kernel, will be presented on next vblank */
	struct wlr_drm_fb *queued_fb;
	/* Buffer currently displayed on screen */
	struct wlr_drm_fb *current_fb;

	struct wlr_drm_format_set formats;

	union wlr_drm_plane_props props;

	uint32_t initial_crtc_id;
	struct liftoff_plane *liftoff;
	struct liftoff_layer *liftoff_layer;
};

struct wlr_drm_layer {
	struct wlr_output_layer *wlr;
	struct liftoff_layer *liftoff;
	struct wlr_addon addon; // wlr_output_layer.addons
	struct wl_list link; // wlr_drm_crtc.layers

	/* Buffer to be submitted to the kernel on the next page-flip */
	struct wlr_drm_fb *pending_fb;
	/* Buffer submitted to the kernel, will be presented on next vblank */
	struct wlr_drm_fb *queued_fb;
	/* Buffer currently displayed on screen */
	struct wlr_drm_fb *current_fb;

	// One entry per wlr_drm_backend.planes
	bool *candidate_planes;
};

struct wlr_drm_crtc {
	uint32_t id;
	struct wlr_drm_lease *lease;
	struct liftoff_output *liftoff;
	struct liftoff_layer *liftoff_composition_layer;
	struct wl_list layers; // wlr_drm_layer.link

	// Atomic modesetting only
	uint32_t mode_id;
	uint32_t gamma_lut;

	// Legacy only
	int legacy_gamma_size;

	struct wlr_drm_plane *primary;
	struct wlr_drm_plane *cursor;

	union wlr_drm_crtc_props props;
};

struct wlr_drm_backend {
	struct wlr_backend backend;

	struct wlr_drm_backend *parent;
	const struct wlr_drm_interface *iface;
	bool addfb2_modifiers;

	int fd;
	char *name;
	struct wlr_device *dev;
	struct liftoff_device *liftoff;

	size_t num_crtcs;
	struct wlr_drm_crtc *crtcs;

	size_t num_planes;
	struct wlr_drm_plane *planes;

	struct wl_event_source *drm_event;

	struct wl_listener session_destroy;
	struct wl_listener session_active;
	struct wl_listener parent_destroy;
	struct wl_listener dev_change;
	struct wl_listener dev_remove;

	struct wl_list fbs; // wlr_drm_fb.link
	struct wl_list connectors; // wlr_drm_connector.link

	struct wl_list page_flips; // wlr_drm_page_flip.link

	/* Only initialized on multi-GPU setups */
	struct wlr_drm_renderer mgpu_renderer;

	struct wlr_session *session;

	uint64_t cursor_width, cursor_height;

	struct wlr_drm_format_set mgpu_formats;

	bool supports_tearing_page_flips;
};

struct wlr_drm_mode {
	struct wlr_output_mode wlr_mode;
	drmModeModeInfo drm_mode;
};

struct wlr_drm_connector_state {
	const struct wlr_output_state *base;
	bool modeset;
	bool nonblock;
	bool active;
	drmModeModeInfo mode;
	struct wlr_drm_fb *primary_fb;
};

/**
 * Per-page-flip tracking struct.
 *
 * We've asked for a state change in the kernel, and yet to receive a
 * notification for its completion. Currently, the kernel only has a queue
 * length of 1, and no way to modify your submissions after they're sent.
 *
 * However, we might have multiple in-flight page-flip events, for instance
 * when performing a non-blocking commit followed by a blocking commit. In
 * that case, conn will be set to NULL on the non-blocking commit to indicate
 * that it's been superseded.
 */
struct wlr_drm_page_flip {
	struct wl_list link; // wlr_drm_connector.page_flips
	struct wlr_drm_connector *conn;
};

struct wlr_drm_connector {
	struct wlr_output output; // only valid if status != DISCONNECTED

	struct wlr_drm_backend *backend;
	char name[24];
	drmModeConnection status;
	uint32_t id;
	uint64_t max_bpc_bounds[2];
	struct wlr_drm_lease *lease;

	struct wlr_drm_crtc *crtc;
	uint32_t possible_crtcs;

	union wlr_drm_connector_props props;

	bool cursor_enabled;
	int cursor_x, cursor_y;
	int cursor_width, cursor_height;
	int cursor_hotspot_x, cursor_hotspot_y;
	/* Buffer to be submitted to the kernel on the next page-flip */
	struct wlr_drm_fb *cursor_pending_fb;

	struct wl_list link; // wlr_drm_backend.connectors

	// Last committed page-flip
	struct wlr_drm_page_flip *pending_page_flip;

	int32_t refresh;
};

struct wlr_drm_backend *get_drm_backend_from_backend(
	struct wlr_backend *wlr_backend);
bool check_drm_features(struct wlr_drm_backend *drm);
bool init_drm_resources(struct wlr_drm_backend *drm);
void finish_drm_resources(struct wlr_drm_backend *drm);
void scan_drm_connectors(struct wlr_drm_backend *state,
	struct wlr_device_hotplug_event *event);
void scan_drm_leases(struct wlr_drm_backend *drm);
int handle_drm_event(int fd, uint32_t mask, void *data);
void destroy_drm_connector(struct wlr_drm_connector *conn);
bool drm_connector_commit_state(struct wlr_drm_connector *conn,
	const struct wlr_output_state *state);
bool drm_connector_is_cursor_visible(struct wlr_drm_connector *conn);
bool drm_connector_supports_vrr(struct wlr_drm_connector *conn);
size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,
	struct wlr_drm_crtc *crtc);
void drm_lease_destroy(struct wlr_drm_lease *lease);
void drm_page_flip_destroy(struct wlr_drm_page_flip *page_flip);

struct wlr_drm_fb *get_next_cursor_fb(struct wlr_drm_connector *conn);
struct wlr_drm_layer *get_drm_layer(struct wlr_drm_backend *drm,
	struct wlr_output_layer *layer);

#define wlr_drm_conn_log(conn, verb, fmt, ...) \
	wlr_log(verb, "connector %s: " fmt, conn->name, ##__VA_ARGS__)
#define wlr_drm_conn_log_errno(conn, verb, fmt, ...) \
	wlr_log_errno(verb, "connector %s: " fmt, conn->name, ##__VA_ARGS__)

#endif