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.
9 * See the COPYING file in the top-level directory.
15 #include <sys/types.h>
18 #include <sys/ioctl.h>
22 #include <linux/matroxfb.h>
32 struct fb_var_screeninfo fbvar_old;
33 struct fb_var_screeninfo fbvar_new;
37 int top_border, bottom_border;
39 size_t mem_saved_size;
42 void *vout_fbdev_flip(struct vout_fbdev *fbdev)
46 if (fbdev->buffer_count < 2)
49 draw_buf = fbdev->buffer_write;
50 fbdev->buffer_write++;
51 if (fbdev->buffer_write >= fbdev->buffer_count)
52 fbdev->buffer_write = 0;
54 fbdev->fbvar_new.yoffset =
55 (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
58 ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
60 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
63 void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
66 ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
69 void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
70 int left_border, int right_border, int top_border, int bottom_border,
71 int buffer_cnt, int first_write_to_front)
73 int w_total = left_border + w + right_border;
74 int h_total = top_border + h + bottom_border;
78 // unblank to be sure the mode is really accepted
79 ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
81 if (fbdev->fbvar_new.bits_per_pixel != bpp ||
82 fbdev->fbvar_new.xres != w ||
83 fbdev->fbvar_new.yres != h ||
84 fbdev->fbvar_new.xres_virtual != w_total||
85 fbdev->fbvar_new.yres_virtual < h_total ||
86 fbdev->fbvar_new.xoffset != left_border ||
87 fbdev->buffer_count != buffer_cnt)
89 if (fbdev->fbvar_new.bits_per_pixel != bpp ||
90 w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres)
91 printf(PFX "switching to %dx%d@%d\n", w, h, bpp);
93 fbdev->fbvar_new.xres = w;
94 fbdev->fbvar_new.yres = h;
95 fbdev->fbvar_new.xres_virtual = w_total;
96 fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt;
97 fbdev->fbvar_new.xoffset = left_border;
98 fbdev->fbvar_new.yoffset = top_border;
99 fbdev->fbvar_new.bits_per_pixel = bpp;
100 fbdev->fbvar_new.nonstd = 0; // can set YUV here on omapfb
101 fbdev->buffer_count = buffer_cnt;
102 fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0;
103 if (first_write_to_front)
104 fbdev->buffer_write = 0;
106 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
108 // retry with no multibuffering
109 fbdev->fbvar_new.yres_virtual = h_total;
110 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
112 perror(PFX "FBIOPUT_VSCREENINFO ioctl");
115 fbdev->buffer_count = 1;
116 fbdev->buffer_write = 0;
117 fprintf(stderr, PFX "Warning: failed to increase virtual resolution, "
118 "multibuffering disabled\n");
121 // omap is still using the old mode until vsync,
122 // if the caller starts to write now we may get garbage on screen
123 vout_fbdev_wait_vsync(fbdev);
126 fbdev->fb_size = w_total * h_total * bpp / 8;
127 fbdev->top_border = top_border;
128 fbdev->bottom_border = bottom_border;
130 mem_size = fbdev->fb_size * fbdev->buffer_count;
131 if (fbdev->mem_size >= mem_size)
134 if (fbdev->mem != NULL)
135 munmap(fbdev->mem, fbdev->mem_size);
137 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
138 if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
139 fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size);
140 fbdev->buffer_count = 1;
141 fbdev->buffer_write = 0;
142 mem_size = fbdev->fb_size;
143 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
145 if (fbdev->mem == MAP_FAILED) {
148 perror(PFX "mmap framebuffer");
152 fbdev->mem_size = mem_size;
155 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
158 void vout_fbdev_clear(struct vout_fbdev *fbdev)
161 memset(fbdev->mem, 0, fbdev->fb_size * fbdev->buffer_count);
164 void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
166 int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
169 if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
170 count = fbdev->top_border + fbdev->fbvar_new.yres - y;
172 if (y >= 0 && count > 0)
173 for (i = 0; i < fbdev->buffer_count; i++)
174 memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
177 int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
182 struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt)
184 struct vout_fbdev *fbdev;
189 fbdev = calloc(1, sizeof(*fbdev));
193 fbdev->fd = open(fbdev_name, O_RDWR);
194 if (fbdev->fd == -1) {
195 fprintf(stderr, PFX "%s: ", fbdev_name);
200 ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
202 perror(PFX "FBIOGET_VSCREENINFO ioctl");
206 fbdev->fbvar_new = fbdev->fbvar_old;
208 req_w = fbdev->fbvar_new.xres;
211 req_h = fbdev->fbvar_new.yres;
215 pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt, 0);
219 printf(PFX "%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres,
220 fbdev->fbvar_new.yres, fbdev->fbvar_new.bits_per_pixel);
221 *w = fbdev->fbvar_new.xres;
222 *h = fbdev->fbvar_new.yres;
224 memset(fbdev->mem, 0, fbdev->mem_size);
228 ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
230 fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n");
232 if (fbdev->buffer_count > 1) {
233 fbdev->buffer_write = 0;
234 fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
235 ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
237 fbdev->buffer_count = 1;
238 fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n");
242 printf("fbdev initialized.\n");
252 static void vout_fbdev_release(struct vout_fbdev *fbdev)
254 ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
255 if (fbdev->mem != MAP_FAILED)
256 munmap(fbdev->mem, fbdev->mem_size);
260 int vout_fbdev_save(struct vout_fbdev *fbdev)
264 if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) {
265 fprintf(stderr, PFX "bad args for save\n");
269 if (fbdev->mem_saved_size < fbdev->mem_size) {
270 tmp = realloc(fbdev->mem_saved, fbdev->mem_size);
273 fbdev->mem_saved = tmp;
275 memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size);
276 fbdev->mem_saved_size = fbdev->mem_size;
278 vout_fbdev_release(fbdev);
282 int vout_fbdev_restore(struct vout_fbdev *fbdev)
286 if (fbdev == NULL || fbdev->mem != NULL) {
287 fprintf(stderr, PFX "bad args/state for restore\n");
291 fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
292 if (fbdev->mem == MAP_FAILED) {
293 perror(PFX "restore: memory restore failed");
296 memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size);
298 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
300 perror(PFX "restore: FBIOPUT_VSCREENINFO");
307 void vout_fbdev_finish(struct vout_fbdev *fbdev)
309 vout_fbdev_release(fbdev);