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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2010 |
3 | * |
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4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
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8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <stdlib.h> |
13 | #include <string.h> |
14 | #include <sys/types.h> |
15 | #include <sys/stat.h> |
16 | #include <fcntl.h> |
17 | #include <sys/ioctl.h> |
18 | #include <sys/mman.h> |
19 | #include <unistd.h> |
20 | #include <linux/fb.h> |
21 | #include <linux/matroxfb.h> |
22 | |
23 | #include "fbdev.h" |
24 | |
090bcb85 |
25 | #define PFX "fbdev: " |
26 | |
d45df001 |
27 | #ifndef OMAPFB_WAITFORVSYNC_FRAME |
28 | #define OMAPFB_WAITFORVSYNC_FRAME _IOWR('O', 70, int) |
29 | #endif |
30 | |
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31 | struct vout_fbdev { |
32 | int fd; |
33 | void *mem; |
34 | size_t mem_size; |
35 | struct fb_var_screeninfo fbvar_old; |
36 | struct fb_var_screeninfo fbvar_new; |
37 | int buffer_write; |
38 | int fb_size; |
39 | int buffer_count; |
40 | int top_border, bottom_border; |
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41 | void *mem_saved; |
42 | size_t mem_saved_size; |
d45df001 |
43 | unsigned long vsync_ioctl; |
44 | int vsync_arg; |
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45 | }; |
46 | |
47 | void *vout_fbdev_flip(struct vout_fbdev *fbdev) |
48 | { |
49 | int draw_buf; |
50 | |
51 | if (fbdev->buffer_count < 2) |
52 | return fbdev->mem; |
53 | |
54 | draw_buf = fbdev->buffer_write; |
55 | fbdev->buffer_write++; |
56 | if (fbdev->buffer_write >= fbdev->buffer_count) |
57 | fbdev->buffer_write = 0; |
58 | |
59 | fbdev->fbvar_new.yoffset = |
60 | (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf + |
61 | fbdev->top_border; |
62 | |
63 | ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); |
64 | |
65 | return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write; |
66 | } |
67 | |
68 | void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev) |
69 | { |
d45df001 |
70 | if (fbdev->vsync_ioctl != 0) |
71 | ioctl(fbdev->fd, fbdev->vsync_ioctl, &fbdev->vsync_arg); |
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72 | } |
73 | |
f9b3f440 |
74 | /* it is recommended to call vout_fbdev_clear() before this */ |
75 | void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, |
76 | int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt) |
83b5751b |
77 | { |
78 | int w_total = left_border + w + right_border; |
79 | int h_total = top_border + h + bottom_border; |
80 | size_t mem_size; |
81 | int ret; |
82 | |
83 | // unblank to be sure the mode is really accepted |
84 | ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK); |
85 | |
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86 | if (fbdev->fbvar_new.bits_per_pixel != bpp || |
87 | fbdev->fbvar_new.xres != w || |
88 | fbdev->fbvar_new.yres != h || |
89 | fbdev->fbvar_new.xres_virtual != w_total|| |
90 | fbdev->fbvar_new.yres_virtual < h_total || |
91 | fbdev->fbvar_new.xoffset != left_border || |
92 | fbdev->buffer_count != buffer_cnt) |
93 | { |
94 | if (fbdev->fbvar_new.bits_per_pixel != bpp || |
95 | w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres) |
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96 | printf(PFX "switching to %dx%d@%d\n", w, h, bpp); |
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97 | |
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98 | fbdev->fbvar_new.xres = w; |
99 | fbdev->fbvar_new.yres = h; |
100 | fbdev->fbvar_new.xres_virtual = w_total; |
f9b3f440 |
101 | fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt; |
83b5751b |
102 | fbdev->fbvar_new.xoffset = left_border; |
f9b3f440 |
103 | fbdev->fbvar_new.yoffset = top_border; |
104 | fbdev->fbvar_new.bits_per_pixel = bpp; |
105 | fbdev->fbvar_new.nonstd = 0; // can set YUV here on omapfb |
106 | fbdev->buffer_count = buffer_cnt; |
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107 | fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0; |
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108 | |
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109 | // seems to help a bit to avoid glitches |
110 | vout_fbdev_wait_vsync(fbdev); |
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111 | |
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112 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
113 | if (ret == -1) { |
f9b3f440 |
114 | // retry with no multibuffering |
115 | fbdev->fbvar_new.yres_virtual = h_total; |
116 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
117 | if (ret == -1) { |
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118 | perror(PFX "FBIOPUT_VSCREENINFO ioctl"); |
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119 | return NULL; |
120 | } |
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121 | fbdev->buffer_count = 1; |
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122 | fbdev->buffer_write = 0; |
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123 | fprintf(stderr, PFX "Warning: failed to increase virtual resolution, " |
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124 | "multibuffering disabled\n"); |
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125 | } |
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126 | |
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127 | } |
128 | |
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129 | fbdev->fb_size = w_total * h_total * bpp / 8; |
83b5751b |
130 | fbdev->top_border = top_border; |
131 | fbdev->bottom_border = bottom_border; |
132 | |
133 | mem_size = fbdev->fb_size * fbdev->buffer_count; |
134 | if (fbdev->mem_size >= mem_size) |
f9b3f440 |
135 | goto out; |
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136 | |
137 | if (fbdev->mem != NULL) |
138 | munmap(fbdev->mem, fbdev->mem_size); |
139 | |
140 | fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
141 | if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) { |
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142 | fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size); |
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143 | fbdev->buffer_count = 1; |
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144 | fbdev->buffer_write = 0; |
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145 | mem_size = fbdev->fb_size; |
146 | fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
147 | } |
148 | if (fbdev->mem == MAP_FAILED) { |
149 | fbdev->mem = NULL; |
150 | fbdev->mem_size = 0; |
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151 | perror(PFX "mmap framebuffer"); |
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152 | return NULL; |
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153 | } |
154 | |
155 | fbdev->mem_size = mem_size; |
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156 | |
157 | out: |
158 | return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write; |
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159 | } |
160 | |
161 | void vout_fbdev_clear(struct vout_fbdev *fbdev) |
162 | { |
163 | memset(fbdev->mem, 0, fbdev->mem_size); |
164 | } |
165 | |
166 | void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count) |
167 | { |
168 | int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8; |
169 | int i; |
170 | |
171 | if (y + count > fbdev->top_border + fbdev->fbvar_new.yres) |
172 | count = fbdev->top_border + fbdev->fbvar_new.yres - y; |
173 | |
174 | if (y >= 0 && count > 0) |
175 | for (i = 0; i < fbdev->buffer_count; i++) |
176 | memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count); |
177 | } |
178 | |
179 | int vout_fbdev_get_fd(struct vout_fbdev *fbdev) |
180 | { |
181 | return fbdev->fd; |
182 | } |
183 | |
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184 | void *vout_fbdev_get_active_mem(struct vout_fbdev *fbdev) |
185 | { |
186 | int i; |
187 | |
188 | i = fbdev->buffer_write - 1; |
189 | if (i < 0) |
190 | i = fbdev->buffer_count - 1; |
191 | |
192 | return (char *)fbdev->mem + fbdev->fb_size * i; |
193 | } |
194 | |
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195 | struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt) |
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196 | { |
197 | struct vout_fbdev *fbdev; |
198 | int req_w, req_h; |
f9b3f440 |
199 | void *pret; |
83b5751b |
200 | int ret; |
201 | |
202 | fbdev = calloc(1, sizeof(*fbdev)); |
203 | if (fbdev == NULL) |
204 | return NULL; |
205 | |
206 | fbdev->fd = open(fbdev_name, O_RDWR); |
207 | if (fbdev->fd == -1) { |
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208 | fprintf(stderr, PFX "%s: ", fbdev_name); |
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209 | perror("open"); |
210 | goto fail_open; |
211 | } |
212 | |
213 | ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old); |
214 | if (ret == -1) { |
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215 | perror(PFX "FBIOGET_VSCREENINFO ioctl"); |
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216 | goto fail; |
217 | } |
218 | |
219 | fbdev->fbvar_new = fbdev->fbvar_old; |
220 | |
221 | req_w = fbdev->fbvar_new.xres; |
222 | if (*w != 0) |
223 | req_w = *w; |
224 | req_h = fbdev->fbvar_new.yres; |
225 | if (*h != 0) |
226 | req_h = *h; |
227 | |
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228 | pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt); |
229 | if (pret == NULL) |
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230 | goto fail; |
231 | |
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232 | printf(PFX "%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, |
233 | fbdev->fbvar_new.yres, fbdev->fbvar_new.bits_per_pixel); |
83b5751b |
234 | *w = fbdev->fbvar_new.xres; |
235 | *h = fbdev->fbvar_new.yres; |
236 | |
237 | memset(fbdev->mem, 0, fbdev->mem_size); |
238 | |
239 | // some checks |
d45df001 |
240 | // screen was unblanked by vout_fbdev_resize(), so vsync should work |
241 | // first try pandora's adaptive vsync hack, then the default one |
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242 | ret = 0; |
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243 | ret = ioctl(fbdev->fd, OMAPFB_WAITFORVSYNC_FRAME, &ret); |
244 | if (ret == 0) |
245 | fbdev->vsync_ioctl = OMAPFB_WAITFORVSYNC_FRAME; |
246 | if (ret != 0) { |
247 | ret = 0; |
248 | ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret); |
249 | if (ret == 0) |
250 | fbdev->vsync_ioctl = FBIO_WAITFORVSYNC; |
251 | } |
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252 | if (ret != 0) |
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253 | fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n"); |
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254 | |
255 | if (fbdev->buffer_count > 1) { |
256 | fbdev->buffer_write = 0; |
257 | fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1); |
258 | ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); |
259 | if (ret != 0) { |
260 | fbdev->buffer_count = 1; |
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261 | fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n"); |
83b5751b |
262 | } |
263 | } |
264 | |
265 | printf("fbdev initialized.\n"); |
266 | return fbdev; |
267 | |
268 | fail: |
269 | close(fbdev->fd); |
270 | fail_open: |
271 | free(fbdev); |
272 | return NULL; |
273 | } |
274 | |
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275 | static void vout_fbdev_release(struct vout_fbdev *fbdev) |
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276 | { |
277 | ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old); |
278 | if (fbdev->mem != MAP_FAILED) |
279 | munmap(fbdev->mem, fbdev->mem_size); |
090bcb85 |
280 | fbdev->mem = NULL; |
281 | } |
282 | |
283 | int vout_fbdev_save(struct vout_fbdev *fbdev) |
284 | { |
285 | void *tmp; |
286 | |
287 | if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) { |
288 | fprintf(stderr, PFX "bad args for save\n"); |
289 | return -1; |
290 | } |
291 | |
292 | if (fbdev->mem_saved_size < fbdev->mem_size) { |
293 | tmp = realloc(fbdev->mem_saved, fbdev->mem_size); |
294 | if (tmp == NULL) |
295 | return -1; |
296 | fbdev->mem_saved = tmp; |
297 | } |
298 | memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size); |
299 | fbdev->mem_saved_size = fbdev->mem_size; |
300 | |
301 | vout_fbdev_release(fbdev); |
302 | return 0; |
303 | } |
304 | |
305 | int vout_fbdev_restore(struct vout_fbdev *fbdev) |
306 | { |
307 | int ret; |
308 | |
309 | if (fbdev == NULL || fbdev->mem != NULL) { |
310 | fprintf(stderr, PFX "bad args/state for restore\n"); |
311 | return -1; |
312 | } |
313 | |
314 | fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
315 | if (fbdev->mem == MAP_FAILED) { |
316 | perror(PFX "restore: memory restore failed"); |
317 | return -1; |
318 | } |
319 | memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size); |
320 | |
321 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
322 | if (ret == -1) { |
323 | perror(PFX "restore: FBIOPUT_VSCREENINFO"); |
324 | return -1; |
325 | } |
326 | |
327 | return 0; |
328 | } |
329 | |
330 | void vout_fbdev_finish(struct vout_fbdev *fbdev) |
331 | { |
332 | vout_fbdev_release(fbdev); |
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333 | if (fbdev->fd >= 0) |
334 | close(fbdev->fd); |
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335 | fbdev->fd = -1; |
336 | free(fbdev); |
337 | } |
338 | |