2 * (C) GraÅžvydas "notaz" Ignotas, 2009-2010
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
8 * See the COPYING file in the top-level directory.
14 #include <sys/types.h>
17 #include <sys/ioctl.h>
21 #include <linux/matroxfb.h>
27 #ifndef OMAPFB_WAITFORVSYNC_FRAME
28 #define OMAPFB_WAITFORVSYNC_FRAME _IOWR('O', 70, int)
35 struct fb_var_screeninfo fbvar_old;
36 struct fb_var_screeninfo fbvar_new;
40 int top_border, bottom_border;
42 size_t mem_saved_size;
43 unsigned long vsync_ioctl;
47 void *vout_fbdev_flip(struct vout_fbdev *fbdev)
51 if (fbdev->buffer_count < 2)
54 draw_buf = fbdev->buffer_write;
55 fbdev->buffer_write++;
56 if (fbdev->buffer_write >= fbdev->buffer_count)
57 fbdev->buffer_write = 0;
59 fbdev->fbvar_new.yoffset =
60 (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
63 ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
65 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
68 void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
70 if (fbdev->vsync_ioctl != 0)
71 ioctl(fbdev->fd, fbdev->vsync_ioctl, &fbdev->vsync_arg);
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)
78 int w_total = left_border + w + right_border;
79 int h_total = top_border + h + bottom_border;
83 // unblank to be sure the mode is really accepted
84 ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
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)
94 if (fbdev->fbvar_new.bits_per_pixel != bpp ||
95 w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres)
96 printf(PFX "switching to %dx%d@%d\n", w, h, bpp);
98 fbdev->fbvar_new.xres = w;
99 fbdev->fbvar_new.yres = h;
100 fbdev->fbvar_new.xres_virtual = w_total;
101 fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt;
102 fbdev->fbvar_new.xoffset = left_border;
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;
107 fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0;
109 // seems to help a bit to avoid glitches
110 vout_fbdev_wait_vsync(fbdev);
112 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
114 // retry with no multibuffering
115 fbdev->fbvar_new.yres_virtual = h_total;
116 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
118 perror(PFX "FBIOPUT_VSCREENINFO ioctl");
121 fbdev->buffer_count = 1;
122 fbdev->buffer_write = 0;
123 fprintf(stderr, PFX "Warning: failed to increase virtual resolution, "
124 "multibuffering disabled\n");
129 fbdev->fb_size = w_total * h_total * bpp / 8;
130 fbdev->top_border = top_border;
131 fbdev->bottom_border = bottom_border;
133 mem_size = fbdev->fb_size * fbdev->buffer_count;
134 if (fbdev->mem_size >= mem_size)
137 if (fbdev->mem != NULL)
138 munmap(fbdev->mem, fbdev->mem_size);
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) {
142 fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size);
143 fbdev->buffer_count = 1;
144 fbdev->buffer_write = 0;
145 mem_size = fbdev->fb_size;
146 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
148 if (fbdev->mem == MAP_FAILED) {
151 perror(PFX "mmap framebuffer");
155 fbdev->mem_size = mem_size;
158 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
161 void vout_fbdev_clear(struct vout_fbdev *fbdev)
163 memset(fbdev->mem, 0, fbdev->mem_size);
166 void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
168 int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
171 if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
172 count = fbdev->top_border + fbdev->fbvar_new.yres - y;
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);
179 int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
184 void *vout_fbdev_get_active_mem(struct vout_fbdev *fbdev)
188 i = fbdev->buffer_write - 1;
190 i = fbdev->buffer_count - 1;
192 return (char *)fbdev->mem + fbdev->fb_size * i;
195 struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt)
197 struct vout_fbdev *fbdev;
202 fbdev = calloc(1, sizeof(*fbdev));
206 fbdev->fd = open(fbdev_name, O_RDWR);
207 if (fbdev->fd == -1) {
208 fprintf(stderr, PFX "%s: ", fbdev_name);
213 ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
215 perror(PFX "FBIOGET_VSCREENINFO ioctl");
219 fbdev->fbvar_new = fbdev->fbvar_old;
221 req_w = fbdev->fbvar_new.xres;
224 req_h = fbdev->fbvar_new.yres;
228 pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
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);
234 *w = fbdev->fbvar_new.xres;
235 *h = fbdev->fbvar_new.yres;
237 memset(fbdev->mem, 0, fbdev->mem_size);
240 // screen was unblanked by vout_fbdev_resize(), so vsync should work
241 // first try pandora's adaptive vsync hack, then the default one
243 ret = ioctl(fbdev->fd, OMAPFB_WAITFORVSYNC_FRAME, &ret);
245 fbdev->vsync_ioctl = OMAPFB_WAITFORVSYNC_FRAME;
248 ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
250 fbdev->vsync_ioctl = FBIO_WAITFORVSYNC;
253 fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n");
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);
260 fbdev->buffer_count = 1;
261 fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n");
265 printf("fbdev initialized.\n");
275 static void vout_fbdev_release(struct vout_fbdev *fbdev)
277 ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
278 if (fbdev->mem != MAP_FAILED)
279 munmap(fbdev->mem, fbdev->mem_size);
283 int vout_fbdev_save(struct vout_fbdev *fbdev)
287 if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) {
288 fprintf(stderr, PFX "bad args for save\n");
292 if (fbdev->mem_saved_size < fbdev->mem_size) {
293 tmp = realloc(fbdev->mem_saved, fbdev->mem_size);
296 fbdev->mem_saved = tmp;
298 memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size);
299 fbdev->mem_saved_size = fbdev->mem_size;
301 vout_fbdev_release(fbdev);
305 int vout_fbdev_restore(struct vout_fbdev *fbdev)
309 if (fbdev == NULL || fbdev->mem != NULL) {
310 fprintf(stderr, PFX "bad args/state for restore\n");
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");
319 memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size);
321 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
323 perror(PFX "restore: FBIOPUT_VSCREENINFO");
330 void vout_fbdev_finish(struct vout_fbdev *fbdev)
332 vout_fbdev_release(fbdev);