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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <inttypes.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "gfx.h"
#include "drmtools.h"
/* ------------------------------------------------------------------ */
/* device */
int drm_fd;
drmModeEncoder *drm_enc = NULL;
drmModeModeInfo *drm_mode = NULL;
drmModeConnector *drm_conn = NULL;
static drmModeCrtc *scrtc = NULL;
struct drmfb {
uint32_t id;
struct drm_mode_create_dumb creq;
uint8_t *mem;
} fb1, fb2, *fbc;
/* ------------------------------------------------------------------ */
static const char *conn_type[] = {
[ DRM_MODE_CONNECTOR_Unknown ] = "unknown",
[ DRM_MODE_CONNECTOR_VGA ] = "vga",
[ DRM_MODE_CONNECTOR_DVII ] = "dvi-i",
[ DRM_MODE_CONNECTOR_DVID ] = "dvi-d",
[ DRM_MODE_CONNECTOR_DVIA ] = "dvi-a",
[ DRM_MODE_CONNECTOR_Composite ] = "composite",
[ DRM_MODE_CONNECTOR_SVIDEO ] = "svideo",
[ DRM_MODE_CONNECTOR_LVDS ] = "lvds",
[ DRM_MODE_CONNECTOR_Component ] = "component",
[ DRM_MODE_CONNECTOR_9PinDIN ] = "9pin-din",
[ DRM_MODE_CONNECTOR_DisplayPort ] = "dp",
[ DRM_MODE_CONNECTOR_HDMIA ] = "hdmi-a",
[ DRM_MODE_CONNECTOR_HDMIB ] = "hdmi-b",
[ DRM_MODE_CONNECTOR_TV ] = "tv",
[ DRM_MODE_CONNECTOR_eDP ] = "edp",
[ DRM_MODE_CONNECTOR_VIRTUAL ] = "virtual",
[ DRM_MODE_CONNECTOR_DSI ] = "dsi",
};
static void drm_conn_name(drmModeConnector *conn, char *dest, int dlen)
{
const char *type;
if (conn->connector_type_id < sizeof(conn_type)/sizeof(conn_type[0]) &&
conn_type[conn->connector_type]) {
type = conn_type[conn->connector_type];
} else {
type = "unknown";
}
snprintf(dest, dlen, "%s-%d", type, conn->connector_type_id);
}
/* ------------------------------------------------------------------ */
void drm_cleanup_display(void)
{
/* restore crtc */
if (scrtc) {
drmModeSetCrtc(drm_fd, scrtc->crtc_id, scrtc->buffer_id, scrtc->x, scrtc->y,
&drm_conn->connector_id, 1, &scrtc->mode);
}
}
int drm_init_dev(const char *dev, const char *output)
{
drmModeRes *res;
char name[64];
uint64_t has_dumb;
int i, rc;
/* open device */
drm_fd = open(dev, O_RDWR);
if (drm_fd < 0) {
fprintf(stderr, "drm: open %s: %s\n", dev, strerror(errno));
return -1;
}
rc = drmGetCap(drm_fd, DRM_CAP_DUMB_BUFFER, &has_dumb);
if (rc < 0 || !has_dumb) {
fprintf(stderr, "drm: no dumb buffer support\n");
return -1;
}
/* find connector (using first for now) */
res = drmModeGetResources(drm_fd);
if (res == NULL) {
fprintf(stderr, "drm: drmModeGetResources() failed\n");
return -1;
}
for (i = 0; i < res->count_connectors; i++) {
drm_conn = drmModeGetConnector(drm_fd, res->connectors[i]);
if (drm_conn &&
(drm_conn->connection == DRM_MODE_CONNECTED) &&
drm_conn->count_modes) {
if (output) {
drm_conn_name(drm_conn, name, sizeof(name));
if (strcmp(name, output) == 0) {
break;
}
} else {
break;
}
}
drmModeFreeConnector(drm_conn);
drm_conn = NULL;
}
if (!drm_conn) {
if (output) {
fprintf(stderr, "drm: output %s not found or disconnected\n",
output);
} else {
fprintf(stderr, "drm: no usable output found\n");
}
return -1;
}
drm_mode = &drm_conn->modes[0];
drm_enc = drmModeGetEncoder(drm_fd, drm_conn->encoder_id);
if (drm_enc == NULL) {
fprintf(stderr, "drm: drmModeGetEncoder() failed\n");
return -1;
}
/* save crtc */
scrtc = drmModeGetCrtc(drm_fd, drm_enc->crtc_id);
return 0;
}
static int drm_init_fb(struct drmfb *fb)
{
struct drm_mode_map_dumb mreq;
int rc;
/* create framebuffer */
memset(&fb->creq, 0, sizeof(fb->creq));
fb->creq.width = drm_mode->hdisplay;
fb->creq.height = drm_mode->vdisplay;
fb->creq.bpp = 32;
rc = drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &fb->creq);
if (rc < 0) {
fprintf(stderr, "drm: DRM_IOCTL_MODE_CREATE_DUMB: %s\n", strerror(errno));
return -1;
}
rc = drmModeAddFB(drm_fd, fb->creq.width, fb->creq.height,
24, 32, fb->creq.pitch,
fb->creq.handle, &fb->id);
if (rc < 0) {
fprintf(stderr, "drm: drmModeAddFB() failed\n");
return -1;
}
/* map framebuffer */
memset(&mreq, 0, sizeof(mreq));
mreq.handle = fb->creq.handle;
rc = drmIoctl(drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq);
if (rc < 0) {
fprintf(stderr, "drm: DRM_IOCTL_MODE_MAP_DUMB: %s\n", strerror(errno));
return -1;
}
fb->mem = mmap(0, fb->creq.size, PROT_READ | PROT_WRITE, MAP_SHARED,
drm_fd, mreq.offset);
if (fb->mem == MAP_FAILED) {
fprintf(stderr, "drm: framebuffer mmap: %s\n", strerror(errno));
return -1;
}
return 0;
}
static int drm_show_fb(struct drmfb *fb)
{
int rc;
rc = drmModeSetCrtc(drm_fd, drm_enc->crtc_id, fb->id, 0, 0,
&drm_conn->connector_id, 1,
&drm_conn->modes[0]);
if (rc < 0) {
fprintf(stderr, "drm: drmModeSetCrtc() failed\n");
return -1;
}
return 0;
}
/* ------------------------------------------------------------------ */
static void drm_restore_display(void)
{
drm_show_fb(fbc);
}
static void drm_flush_display(bool second)
{
fbc = second ? &fb2 : &fb1;
drm_show_fb(fbc);
drmModeDirtyFB(drm_fd, fbc->id, 0, 0);
}
gfxstate *drm_init(const char *device, const char *output, bool pageflip)
{
gfxstate *gfx;
char dev[64];
if (device) {
snprintf(dev, sizeof(dev), "%s", device);
} else {
snprintf(dev, sizeof(dev), DRM_DEV_NAME, DRM_DIR_NAME, 0);
}
fprintf(stderr, "trying drm: %s ...\n", dev);
if (drm_init_dev(dev, output) < 0)
return NULL;
if (drm_init_fb(&fb1) < 0)
return NULL;
if (drm_show_fb(&fb1) < 0)
return NULL;
/* prepare gfx */
gfx = malloc(sizeof(*gfx));
memset(gfx, 0, sizeof(*gfx));
gfx->hdisplay = drm_mode->hdisplay;
gfx->vdisplay = drm_mode->vdisplay;
gfx->stride = fb1.creq.pitch;
gfx->mem = fb1.mem;
gfx->rlen = 8;
gfx->glen = 8;
gfx->blen = 8;
gfx->tlen = 8;
gfx->roff = 16;
gfx->goff = 8;
gfx->boff = 0;
gfx->toff = 24;
gfx->bits_per_pixel = 32;
gfx->restore_display = drm_restore_display;
gfx->cleanup_display = drm_cleanup_display;
gfx->flush_display = drm_flush_display;
if (pageflip) {
if (drm_init_fb(&fb2) == 0) {
gfx->mem2 = fb2.mem;
} else {
fprintf(stderr, "drm: can't alloc two fbs, pageflip disabled.\n");
}
}
return gfx;
}
/* ------------------------------------------------------------------ */
void drm_info(const char *device)
{
drmModeConnector *conn;
drmModeEncoder *enc;
drmModeCrtc *crtc;
drmModeRes *res;
char name[64];
char dev[64];
int i;
if (device) {
snprintf(dev, sizeof(dev), "%s", device);
} else {
snprintf(dev, sizeof(dev), DRM_DEV_NAME, DRM_DIR_NAME, 0);
}
drm_fd = open(dev, O_RDWR);
if (drm_fd < 0) {
fprintf(stderr, "drm: open %s: %s\n", dev, strerror(errno));
return;
}
fprintf(stdout, "connectors for %s:\n", dev);
res = drmModeGetResources(drm_fd);
if (res == NULL) {
return;
}
for (i = 0; i < res->count_connectors; i++) {
conn = drmModeGetConnector(drm_fd, res->connectors[i]);
if (!conn)
continue;
if (!conn->count_encoders)
return;
drm_conn_name(conn, name, sizeof(name));
enc = NULL;
crtc = NULL;
if (conn->encoder_id) {
enc = drmModeGetEncoder(drm_fd, conn->encoder_id);
if (enc && enc->crtc_id) {
crtc = drmModeGetCrtc(drm_fd, enc->crtc_id);
}
}
if (conn->connection == DRM_MODE_CONNECTED && crtc) {
fprintf(stdout, " %-10s: %dx%d\n", name,
crtc->width, crtc->height);
} else {
fprintf(stdout, " %-10s: disconnected\n", name);
}
drmModeFreeCrtc(crtc);
drmModeFreeEncoder(enc);
drmModeFreeConnector(conn);
}
}
|
