2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
14 #include <linux/module.h>
16 #include <linux/compat.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/major.h>
21 #include <linux/slab.h>
23 #include <linux/mman.h>
25 #include <linux/init.h>
26 #include <linux/linux_logo.h>
27 #include <linux/proc_fs.h>
28 #include <linux/seq_file.h>
29 #include <linux/console.h>
30 #include <linux/kmod.h>
31 #include <linux/err.h>
32 #include <linux/device.h>
33 #include <linux/efi.h>
35 #include <linux/overflow.h>
41 * Frame buffer device initialization and setup routines
44 #define FBPIXMAPSIZE (1024 * 8)
46 static DEFINE_MUTEX(registration_lock);
48 struct fb_info *registered_fb[FB_MAX] __read_mostly;
49 EXPORT_SYMBOL(registered_fb);
51 int num_registered_fb __read_mostly;
52 EXPORT_SYMBOL(num_registered_fb);
54 static struct fb_info *get_fb_info(unsigned int idx)
56 struct fb_info *fb_info;
59 return ERR_PTR(-ENODEV);
61 mutex_lock(®istration_lock);
62 fb_info = registered_fb[idx];
64 atomic_inc(&fb_info->count);
65 mutex_unlock(®istration_lock);
70 static void put_fb_info(struct fb_info *fb_info)
72 if (!atomic_dec_and_test(&fb_info->count))
74 if (fb_info->fbops->fb_destroy)
75 fb_info->fbops->fb_destroy(fb_info);
78 int lock_fb_info(struct fb_info *info)
80 mutex_lock(&info->lock);
82 mutex_unlock(&info->lock);
87 EXPORT_SYMBOL(lock_fb_info);
93 int fb_get_color_depth(struct fb_var_screeninfo *var,
94 struct fb_fix_screeninfo *fix)
98 if (fix->visual == FB_VISUAL_MONO01 ||
99 fix->visual == FB_VISUAL_MONO10)
102 if (var->green.length == var->blue.length &&
103 var->green.length == var->red.length &&
104 var->green.offset == var->blue.offset &&
105 var->green.offset == var->red.offset)
106 depth = var->green.length;
108 depth = var->green.length + var->red.length +
114 EXPORT_SYMBOL(fb_get_color_depth);
117 * Data padding functions.
119 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
121 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
123 EXPORT_SYMBOL(fb_pad_aligned_buffer);
125 void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
126 u32 shift_high, u32 shift_low, u32 mod)
128 u8 mask = (u8) (0xfff << shift_high), tmp;
131 for (i = height; i--; ) {
132 for (j = 0; j < idx; j++) {
135 tmp |= *src >> shift_low;
137 tmp = *src << shift_high;
143 tmp |= *src >> shift_low;
145 if (shift_high < mod) {
146 tmp = *src << shift_high;
153 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
156 * we need to lock this section since fb_cursor
157 * may use fb_imageblit()
159 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
161 u32 align = buf->buf_align - 1, offset;
162 char *addr = buf->addr;
164 /* If IO mapped, we need to sync before access, no sharing of
167 if (buf->flags & FB_PIXMAP_IO) {
168 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
169 info->fbops->fb_sync(info);
173 /* See if we fit in the remaining pixmap space */
174 offset = buf->offset + align;
176 if (offset + size > buf->size) {
177 /* We do not fit. In order to be able to re-use the buffer,
178 * we must ensure no asynchronous DMA'ing or whatever operation
179 * is in progress, we sync for that.
181 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
182 info->fbops->fb_sync(info);
185 buf->offset = offset + size;
190 EXPORT_SYMBOL(fb_get_buffer_offset);
194 static inline unsigned safe_shift(unsigned d, int n)
196 return n < 0 ? d >> -n : d << n;
199 static void fb_set_logocmap(struct fb_info *info,
200 const struct linux_logo *logo)
202 struct fb_cmap palette_cmap;
203 u16 palette_green[16];
204 u16 palette_blue[16];
207 const unsigned char *clut = logo->clut;
209 palette_cmap.start = 0;
210 palette_cmap.len = 16;
211 palette_cmap.red = palette_red;
212 palette_cmap.green = palette_green;
213 palette_cmap.blue = palette_blue;
214 palette_cmap.transp = NULL;
216 for (i = 0; i < logo->clutsize; i += n) {
217 n = logo->clutsize - i;
218 /* palette_cmap provides space for only 16 colors at once */
221 palette_cmap.start = 32 + i;
222 palette_cmap.len = n;
223 for (j = 0; j < n; ++j) {
224 palette_cmap.red[j] = clut[0] << 8 | clut[0];
225 palette_cmap.green[j] = clut[1] << 8 | clut[1];
226 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
229 fb_set_cmap(&palette_cmap, info);
233 static void fb_set_logo_truepalette(struct fb_info *info,
234 const struct linux_logo *logo,
237 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
238 unsigned char redmask, greenmask, bluemask;
239 int redshift, greenshift, blueshift;
241 const unsigned char *clut = logo->clut;
244 * We have to create a temporary palette since console palette is only
247 /* Bug: Doesn't obey msb_right ... (who needs that?) */
248 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
249 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
250 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
251 redshift = info->var.red.offset - (8 - info->var.red.length);
252 greenshift = info->var.green.offset - (8 - info->var.green.length);
253 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
255 for ( i = 0; i < logo->clutsize; i++) {
256 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
257 safe_shift((clut[1] & greenmask), greenshift) |
258 safe_shift((clut[2] & bluemask), blueshift));
263 static void fb_set_logo_directpalette(struct fb_info *info,
264 const struct linux_logo *logo,
267 int redshift, greenshift, blueshift;
270 redshift = info->var.red.offset;
271 greenshift = info->var.green.offset;
272 blueshift = info->var.blue.offset;
274 for (i = 32; i < 32 + logo->clutsize; i++)
275 palette[i] = i << redshift | i << greenshift | i << blueshift;
278 static void fb_set_logo(struct fb_info *info,
279 const struct linux_logo *logo, u8 *dst,
283 const u8 *src = logo->data;
284 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
287 switch (fb_get_color_depth(&info->var, &info->fix)) {
299 if (info->fix.visual == FB_VISUAL_MONO01 ||
300 info->fix.visual == FB_VISUAL_MONO10)
301 fg = ~((u8) (0xfff << info->var.green.length));
305 for (i = 0; i < logo->height; i++)
306 for (j = 0; j < logo->width; src++) {
309 if (j < logo->width) {
310 *dst++ = *src & 0x0f;
316 for (i = 0; i < logo->height; i++) {
317 for (j = 0; j < logo->width; src++) {
319 for (k = 7; k >= 0; k--) {
320 *dst++ = ((d >> k) & 1) ? fg : 0;
330 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
331 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
332 * the visual format and color depth of the framebuffer, the DAC, the
333 * pseudo_palette, and the logo data will be adjusted accordingly.
335 * Case 1 - linux_logo_clut224:
336 * Color exceeds the number of console colors (16), thus we set the hardware DAC
337 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
339 * For visuals that require color info from the pseudo_palette, we also construct
340 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
343 * Case 2 - linux_logo_vga16:
344 * The number of colors just matches the console colors, thus there is no need
345 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
346 * each byte contains color information for two pixels (upper and lower nibble).
347 * To be consistent with fb_imageblit() usage, we therefore separate the two
348 * nibbles into separate bytes. The "depth" flag will be set to 4.
350 * Case 3 - linux_logo_mono:
351 * This is similar with Case 2. Each byte contains information for 8 pixels.
352 * We isolate each bit and expand each into a byte. The "depth" flag will
355 static struct logo_data {
357 int needs_directpalette;
358 int needs_truepalette;
360 const struct linux_logo *logo;
361 } fb_logo __read_mostly;
363 static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
365 u32 size = width * height, i;
369 for (i = size; i--; )
373 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
375 int i, j, h = height - 1;
377 for (i = 0; i < height; i++)
378 for (j = 0; j < width; j++)
379 out[height * j + h - i] = *in++;
382 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
384 int i, j, w = width - 1;
386 for (i = 0; i < height; i++)
387 for (j = 0; j < width; j++)
388 out[height * (w - j) + i] = *in++;
391 static void fb_rotate_logo(struct fb_info *info, u8 *dst,
392 struct fb_image *image, int rotate)
396 if (rotate == FB_ROTATE_UD) {
397 fb_rotate_logo_ud(image->data, dst, image->width,
399 image->dx = info->var.xres - image->width - image->dx;
400 image->dy = info->var.yres - image->height - image->dy;
401 } else if (rotate == FB_ROTATE_CW) {
402 fb_rotate_logo_cw(image->data, dst, image->width,
405 image->width = image->height;
408 image->dy = image->dx;
409 image->dx = info->var.xres - image->width - tmp;
410 } else if (rotate == FB_ROTATE_CCW) {
411 fb_rotate_logo_ccw(image->data, dst, image->width,
414 image->width = image->height;
417 image->dx = image->dy;
418 image->dy = info->var.yres - image->height - tmp;
424 static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
425 int rotate, unsigned int num)
429 if (image->width > info->var.xres || image->height > info->var.yres)
432 if (rotate == FB_ROTATE_UR) {
434 x < num && image->dx + image->width <= info->var.xres;
436 info->fbops->fb_imageblit(info, image);
437 image->dx += image->width + 8;
439 } else if (rotate == FB_ROTATE_UD) {
442 for (x = 0; x < num && image->dx <= dx; x++) {
443 info->fbops->fb_imageblit(info, image);
444 image->dx -= image->width + 8;
446 } else if (rotate == FB_ROTATE_CW) {
448 x < num && image->dy + image->height <= info->var.yres;
450 info->fbops->fb_imageblit(info, image);
451 image->dy += image->height + 8;
453 } else if (rotate == FB_ROTATE_CCW) {
456 for (x = 0; x < num && image->dy <= dy; x++) {
457 info->fbops->fb_imageblit(info, image);
458 image->dy -= image->height + 8;
463 static int fb_show_logo_line(struct fb_info *info, int rotate,
464 const struct linux_logo *logo, int y,
467 u32 *palette = NULL, *saved_pseudo_palette = NULL;
468 unsigned char *logo_new = NULL, *logo_rotate = NULL;
469 struct fb_image image;
471 /* Return if the frame buffer is not mapped or suspended */
472 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
473 info->flags & FBINFO_MODULE)
477 image.data = logo->data;
479 if (fb_logo.needs_cmapreset)
480 fb_set_logocmap(info, logo);
482 if (fb_logo.needs_truepalette ||
483 fb_logo.needs_directpalette) {
484 palette = kmalloc(256 * 4, GFP_KERNEL);
488 if (fb_logo.needs_truepalette)
489 fb_set_logo_truepalette(info, logo, palette);
491 fb_set_logo_directpalette(info, logo, palette);
493 saved_pseudo_palette = info->pseudo_palette;
494 info->pseudo_palette = palette;
497 if (fb_logo.depth <= 4) {
498 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
499 if (logo_new == NULL) {
501 if (saved_pseudo_palette)
502 info->pseudo_palette = saved_pseudo_palette;
505 image.data = logo_new;
506 fb_set_logo(info, logo, logo_new, fb_logo.depth);
511 image.width = logo->width;
512 image.height = logo->height;
515 logo_rotate = kmalloc(logo->width *
516 logo->height, GFP_KERNEL);
518 fb_rotate_logo(info, logo_rotate, &image, rotate);
521 fb_do_show_logo(info, &image, rotate, n);
524 if (saved_pseudo_palette != NULL)
525 info->pseudo_palette = saved_pseudo_palette;
532 #ifdef CONFIG_FB_LOGO_EXTRA
534 #define FB_LOGO_EX_NUM_MAX 10
535 static struct logo_data_extra {
536 const struct linux_logo *logo;
538 } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
539 static unsigned int fb_logo_ex_num;
541 void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
543 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
546 fb_logo_ex[fb_logo_ex_num].logo = logo;
547 fb_logo_ex[fb_logo_ex_num].n = n;
551 static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
556 /* FIXME: logo_ex supports only truecolor fb. */
557 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
560 for (i = 0; i < fb_logo_ex_num; i++) {
561 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
562 fb_logo_ex[i].logo = NULL;
565 height += fb_logo_ex[i].logo->height;
567 height -= fb_logo_ex[i].logo->height;
575 static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
579 for (i = 0; i < fb_logo_ex_num; i++)
580 y += fb_show_logo_line(info, rotate,
581 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
586 #else /* !CONFIG_FB_LOGO_EXTRA */
588 static inline int fb_prepare_extra_logos(struct fb_info *info,
595 static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
600 #endif /* CONFIG_FB_LOGO_EXTRA */
603 int fb_prepare_logo(struct fb_info *info, int rotate)
605 int depth = fb_get_color_depth(&info->var, &info->fix);
608 memset(&fb_logo, 0, sizeof(struct logo_data));
610 if (info->flags & FBINFO_MISC_TILEBLITTING ||
611 info->flags & FBINFO_MODULE)
614 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
615 depth = info->var.blue.length;
616 if (info->var.red.length < depth)
617 depth = info->var.red.length;
618 if (info->var.green.length < depth)
619 depth = info->var.green.length;
622 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
623 /* assume console colormap */
627 /* Return if no suitable logo was found */
628 fb_logo.logo = fb_find_logo(depth);
634 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
635 yres = info->var.yres;
637 yres = info->var.xres;
639 if (fb_logo.logo->height > yres) {
644 /* What depth we asked for might be different from what we get */
645 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
647 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
653 if (fb_logo.depth > 4 && depth > 4) {
654 switch (info->fix.visual) {
655 case FB_VISUAL_TRUECOLOR:
656 fb_logo.needs_truepalette = 1;
658 case FB_VISUAL_DIRECTCOLOR:
659 fb_logo.needs_directpalette = 1;
660 fb_logo.needs_cmapreset = 1;
662 case FB_VISUAL_PSEUDOCOLOR:
663 fb_logo.needs_cmapreset = 1;
668 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
671 int fb_show_logo(struct fb_info *info, int rotate)
675 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
677 y = fb_show_extra_logos(info, y, rotate);
682 int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
683 int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
684 #endif /* CONFIG_LOGO */
685 EXPORT_SYMBOL(fb_prepare_logo);
686 EXPORT_SYMBOL(fb_show_logo);
688 static void *fb_seq_start(struct seq_file *m, loff_t *pos)
690 mutex_lock(®istration_lock);
691 return (*pos < FB_MAX) ? pos : NULL;
694 static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
697 return (*pos < FB_MAX) ? pos : NULL;
700 static void fb_seq_stop(struct seq_file *m, void *v)
702 mutex_unlock(®istration_lock);
705 static int fb_seq_show(struct seq_file *m, void *v)
707 int i = *(loff_t *)v;
708 struct fb_info *fi = registered_fb[i];
711 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
715 static const struct seq_operations proc_fb_seq_ops = {
716 .start = fb_seq_start,
722 static int proc_fb_open(struct inode *inode, struct file *file)
724 return seq_open(file, &proc_fb_seq_ops);
727 static const struct file_operations fb_proc_fops = {
728 .owner = THIS_MODULE,
729 .open = proc_fb_open,
732 .release = seq_release,
736 * We hold a reference to the fb_info in file->private_data,
737 * but if the current registered fb has changed, we don't
738 * actually want to use it.
740 * So look up the fb_info using the inode minor number,
741 * and just verify it against the reference we have.
743 static struct fb_info *file_fb_info(struct file *file)
745 struct inode *inode = file_inode(file);
746 int fbidx = iminor(inode);
747 struct fb_info *info = registered_fb[fbidx];
749 if (info != file->private_data)
755 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
757 unsigned long p = *ppos;
758 struct fb_info *info = file_fb_info(file);
761 int c, cnt = 0, err = 0;
762 unsigned long total_size;
764 if (!info || ! info->screen_base)
767 if (info->state != FBINFO_STATE_RUNNING)
770 if (info->fbops->fb_read)
771 return info->fbops->fb_read(info, buf, count, ppos);
773 total_size = info->screen_size;
776 total_size = info->fix.smem_len;
781 if (count >= total_size)
784 if (count + p > total_size)
785 count = total_size - p;
787 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
792 src = (u8 __iomem *) (info->screen_base + p);
794 if (info->fbops->fb_sync)
795 info->fbops->fb_sync(info);
798 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
800 fb_memcpy_fromfb(dst, src, c);
804 if (copy_to_user(buf, buffer, c)) {
816 return (err) ? err : cnt;
820 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
822 unsigned long p = *ppos;
823 struct fb_info *info = file_fb_info(file);
826 int c, cnt = 0, err = 0;
827 unsigned long total_size;
829 if (!info || !info->screen_base)
832 if (info->state != FBINFO_STATE_RUNNING)
835 if (info->fbops->fb_write)
836 return info->fbops->fb_write(info, buf, count, ppos);
838 total_size = info->screen_size;
841 total_size = info->fix.smem_len;
846 if (count > total_size) {
851 if (count + p > total_size) {
855 count = total_size - p;
858 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
863 dst = (u8 __iomem *) (info->screen_base + p);
865 if (info->fbops->fb_sync)
866 info->fbops->fb_sync(info);
869 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
872 if (copy_from_user(src, buf, c)) {
877 fb_memcpy_tofb(dst, src, c);
888 return (cnt) ? cnt : err;
892 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
894 struct fb_fix_screeninfo *fix = &info->fix;
895 unsigned int yres = info->var.yres;
898 if (var->yoffset > 0) {
899 if (var->vmode & FB_VMODE_YWRAP) {
900 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
904 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
908 if (var->xoffset > 0 && (!fix->xpanstep ||
909 (var->xoffset % fix->xpanstep)))
912 if (err || !info->fbops->fb_pan_display ||
913 var->yoffset > info->var.yres_virtual - yres ||
914 var->xoffset > info->var.xres_virtual - info->var.xres)
917 if ((err = info->fbops->fb_pan_display(var, info)))
919 info->var.xoffset = var->xoffset;
920 info->var.yoffset = var->yoffset;
921 if (var->vmode & FB_VMODE_YWRAP)
922 info->var.vmode |= FB_VMODE_YWRAP;
924 info->var.vmode &= ~FB_VMODE_YWRAP;
927 EXPORT_SYMBOL(fb_pan_display);
929 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
932 struct fb_event event;
933 struct fb_blit_caps caps, fbcaps;
936 memset(&caps, 0, sizeof(caps));
937 memset(&fbcaps, 0, sizeof(fbcaps));
938 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
941 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
942 info->fbops->fb_get_caps(info, &fbcaps, var);
944 if (((fbcaps.x ^ caps.x) & caps.x) ||
945 ((fbcaps.y ^ caps.y) & caps.y) ||
946 (fbcaps.len < caps.len))
953 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
955 int flags = info->flags;
958 if (var->activate & FB_ACTIVATE_INV_MODE) {
959 struct fb_videomode mode1, mode2;
961 fb_var_to_videomode(&mode1, var);
962 fb_var_to_videomode(&mode2, &info->var);
963 /* make sure we don't delete the videomode of current var */
964 ret = fb_mode_is_equal(&mode1, &mode2);
967 struct fb_event event;
971 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
975 fb_delete_videomode(&mode1, &info->modelist);
978 ret = (ret) ? -EINVAL : 0;
982 if ((var->activate & FB_ACTIVATE_FORCE) ||
983 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
984 u32 activate = var->activate;
987 /* When using FOURCC mode, make sure the red, green, blue and
988 * transp fields are set to 0.
990 if ((info->fix.capabilities & FB_CAP_FOURCC) &&
991 var->grayscale > 1) {
992 if (var->red.offset || var->green.offset ||
993 var->blue.offset || var->transp.offset ||
994 var->red.length || var->green.length ||
995 var->blue.length || var->transp.length ||
996 var->red.msb_right || var->green.msb_right ||
997 var->blue.msb_right || var->transp.msb_right)
1001 if (!info->fbops->fb_check_var) {
1006 /* bitfill_aligned() assumes that it's at least 8x8 */
1007 if (var->xres < 8 || var->yres < 8)
1010 /* Too huge resolution causes multiplication overflow. */
1011 if (check_mul_overflow(var->xres, var->yres, &unused) ||
1012 check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused))
1015 ret = info->fbops->fb_check_var(var, info);
1020 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
1021 struct fb_var_screeninfo old_var;
1022 struct fb_videomode mode;
1024 if (info->fbops->fb_get_caps) {
1025 ret = fb_check_caps(info, var, activate);
1031 old_var = info->var;
1034 if (info->fbops->fb_set_par) {
1035 ret = info->fbops->fb_set_par(info);
1038 info->var = old_var;
1039 printk(KERN_WARNING "detected "
1040 "fb_set_par error, "
1041 "error code: %d\n", ret);
1046 fb_pan_display(info, &info->var);
1047 fb_set_cmap(&info->cmap, info);
1048 fb_var_to_videomode(&mode, &info->var);
1050 if (info->modelist.prev && info->modelist.next &&
1051 !list_empty(&info->modelist))
1052 ret = fb_add_videomode(&mode, &info->modelist);
1054 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
1055 struct fb_event event;
1056 int evnt = (activate & FB_ACTIVATE_ALL) ?
1057 FB_EVENT_MODE_CHANGE_ALL :
1058 FB_EVENT_MODE_CHANGE;
1060 info->flags &= ~FBINFO_MISC_USEREVENT;
1063 fb_notifier_call_chain(evnt, &event);
1071 EXPORT_SYMBOL(fb_set_var);
1074 fb_blank(struct fb_info *info, int blank)
1076 struct fb_event event;
1077 int ret = -EINVAL, early_ret;
1079 if (blank > FB_BLANK_POWERDOWN)
1080 blank = FB_BLANK_POWERDOWN;
1083 event.data = ␣
1085 early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
1087 if (info->fbops->fb_blank)
1088 ret = info->fbops->fb_blank(blank, info);
1091 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1094 * if fb_blank is failed then revert effects of
1095 * the early blank event.
1098 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
1103 EXPORT_SYMBOL(fb_blank);
1105 static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1109 struct fb_var_screeninfo var;
1110 struct fb_fix_screeninfo fix;
1111 struct fb_con2fbmap con2fb;
1112 struct fb_cmap cmap_from;
1113 struct fb_cmap_user cmap;
1114 struct fb_event event;
1115 void __user *argp = (void __user *)arg;
1119 case FBIOGET_VSCREENINFO:
1120 if (!lock_fb_info(info))
1123 unlock_fb_info(info);
1125 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1127 case FBIOPUT_VSCREENINFO:
1128 if (copy_from_user(&var, argp, sizeof(var)))
1131 if (!lock_fb_info(info)) {
1135 info->flags |= FBINFO_MISC_USEREVENT;
1136 ret = fb_set_var(info, &var);
1137 info->flags &= ~FBINFO_MISC_USEREVENT;
1138 unlock_fb_info(info);
1140 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1143 case FBIOGET_FSCREENINFO:
1144 if (!lock_fb_info(info))
1146 memcpy(&fix, &info->fix, sizeof(fix));
1147 unlock_fb_info(info);
1149 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1152 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1154 ret = fb_set_user_cmap(&cmap, info);
1157 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1159 if (!lock_fb_info(info))
1161 cmap_from = info->cmap;
1162 unlock_fb_info(info);
1163 ret = fb_cmap_to_user(&cmap_from, &cmap);
1165 case FBIOPAN_DISPLAY:
1166 if (copy_from_user(&var, argp, sizeof(var)))
1169 if (!lock_fb_info(info)) {
1173 ret = fb_pan_display(info, &var);
1174 unlock_fb_info(info);
1176 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1182 case FBIOGET_CON2FBMAP:
1183 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1185 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1187 con2fb.framebuffer = -1;
1188 event.data = &con2fb;
1189 if (!lock_fb_info(info))
1192 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1193 unlock_fb_info(info);
1194 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1196 case FBIOPUT_CON2FBMAP:
1197 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1199 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1201 if (con2fb.framebuffer >= FB_MAX)
1203 if (!registered_fb[con2fb.framebuffer])
1204 request_module("fb%d", con2fb.framebuffer);
1205 if (!registered_fb[con2fb.framebuffer]) {
1209 event.data = &con2fb;
1211 if (!lock_fb_info(info)) {
1216 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1217 unlock_fb_info(info);
1222 if (!lock_fb_info(info)) {
1226 info->flags |= FBINFO_MISC_USEREVENT;
1227 ret = fb_blank(info, arg);
1228 info->flags &= ~FBINFO_MISC_USEREVENT;
1229 unlock_fb_info(info);
1233 if (!lock_fb_info(info))
1237 ret = fb->fb_ioctl(info, cmd, arg);
1240 unlock_fb_info(info);
1245 static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1247 struct fb_info *info = file_fb_info(file);
1251 return do_fb_ioctl(info, cmd, arg);
1254 #ifdef CONFIG_COMPAT
1255 struct fb_fix_screeninfo32 {
1257 compat_caddr_t smem_start;
1266 compat_caddr_t mmio_start;
1276 compat_caddr_t green;
1277 compat_caddr_t blue;
1278 compat_caddr_t transp;
1281 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1284 struct fb_cmap_user __user *cmap;
1285 struct fb_cmap32 __user *cmap32;
1289 cmap = compat_alloc_user_space(sizeof(*cmap));
1290 cmap32 = compat_ptr(arg);
1292 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1295 if (get_user(data, &cmap32->red) ||
1296 put_user(compat_ptr(data), &cmap->red) ||
1297 get_user(data, &cmap32->green) ||
1298 put_user(compat_ptr(data), &cmap->green) ||
1299 get_user(data, &cmap32->blue) ||
1300 put_user(compat_ptr(data), &cmap->blue) ||
1301 get_user(data, &cmap32->transp) ||
1302 put_user(compat_ptr(data), &cmap->transp))
1305 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1308 if (copy_in_user(&cmap32->start,
1316 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1317 struct fb_fix_screeninfo32 __user *fix32)
1322 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1324 data = (__u32) (unsigned long) fix->smem_start;
1325 err |= put_user(data, &fix32->smem_start);
1327 err |= put_user(fix->smem_len, &fix32->smem_len);
1328 err |= put_user(fix->type, &fix32->type);
1329 err |= put_user(fix->type_aux, &fix32->type_aux);
1330 err |= put_user(fix->visual, &fix32->visual);
1331 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1332 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1333 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1334 err |= put_user(fix->line_length, &fix32->line_length);
1336 data = (__u32) (unsigned long) fix->mmio_start;
1337 err |= put_user(data, &fix32->mmio_start);
1339 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1340 err |= put_user(fix->accel, &fix32->accel);
1341 err |= copy_to_user(fix32->reserved, fix->reserved,
1342 sizeof(fix->reserved));
1349 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1352 mm_segment_t old_fs;
1353 struct fb_fix_screeninfo fix;
1354 struct fb_fix_screeninfo32 __user *fix32;
1357 fix32 = compat_ptr(arg);
1361 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1365 err = do_fscreeninfo_to_user(&fix, fix32);
1370 static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1373 struct fb_info *info = file_fb_info(file);
1375 long ret = -ENOIOCTLCMD;
1381 case FBIOGET_VSCREENINFO:
1382 case FBIOPUT_VSCREENINFO:
1383 case FBIOPAN_DISPLAY:
1384 case FBIOGET_CON2FBMAP:
1385 case FBIOPUT_CON2FBMAP:
1386 arg = (unsigned long) compat_ptr(arg);
1388 ret = do_fb_ioctl(info, cmd, arg);
1391 case FBIOGET_FSCREENINFO:
1392 ret = fb_get_fscreeninfo(info, cmd, arg);
1397 ret = fb_getput_cmap(info, cmd, arg);
1401 if (fb->fb_compat_ioctl)
1402 ret = fb->fb_compat_ioctl(info, cmd, arg);
1410 fb_mmap(struct file *file, struct vm_area_struct * vma)
1412 struct fb_info *info = file_fb_info(file);
1414 unsigned long mmio_pgoff;
1415 unsigned long start;
1423 mutex_lock(&info->mm_lock);
1426 res = fb->fb_mmap(info, vma);
1427 mutex_unlock(&info->mm_lock);
1432 * Ugh. This can be either the frame buffer mapping, or
1433 * if pgoff points past it, the mmio mapping.
1435 start = info->fix.smem_start;
1436 len = info->fix.smem_len;
1437 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
1438 if (vma->vm_pgoff >= mmio_pgoff) {
1439 if (info->var.accel_flags) {
1440 mutex_unlock(&info->mm_lock);
1444 vma->vm_pgoff -= mmio_pgoff;
1445 start = info->fix.mmio_start;
1446 len = info->fix.mmio_len;
1448 mutex_unlock(&info->mm_lock);
1450 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1451 fb_pgprotect(file, vma, start);
1453 return vm_iomap_memory(vma, start, len);
1457 fb_open(struct inode *inode, struct file *file)
1458 __acquires(&info->lock)
1459 __releases(&info->lock)
1461 int fbidx = iminor(inode);
1462 struct fb_info *info;
1465 info = get_fb_info(fbidx);
1467 request_module("fb%d", fbidx);
1468 info = get_fb_info(fbidx);
1473 return PTR_ERR(info);
1475 mutex_lock(&info->lock);
1476 if (!try_module_get(info->fbops->owner)) {
1480 file->private_data = info;
1481 if (info->fbops->fb_open) {
1482 res = info->fbops->fb_open(info,1);
1484 module_put(info->fbops->owner);
1486 #ifdef CONFIG_FB_DEFERRED_IO
1488 fb_deferred_io_open(info, inode, file);
1491 mutex_unlock(&info->lock);
1498 fb_release(struct inode *inode, struct file *file)
1499 __acquires(&info->lock)
1500 __releases(&info->lock)
1502 struct fb_info * const info = file->private_data;
1504 mutex_lock(&info->lock);
1505 if (info->fbops->fb_release)
1506 info->fbops->fb_release(info,1);
1507 module_put(info->fbops->owner);
1508 mutex_unlock(&info->lock);
1513 static const struct file_operations fb_fops = {
1514 .owner = THIS_MODULE,
1517 .unlocked_ioctl = fb_ioctl,
1518 #ifdef CONFIG_COMPAT
1519 .compat_ioctl = fb_compat_ioctl,
1523 .release = fb_release,
1524 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1525 .get_unmapped_area = get_fb_unmapped_area,
1527 #ifdef CONFIG_FB_DEFERRED_IO
1528 .fsync = fb_deferred_io_fsync,
1530 .llseek = default_llseek,
1533 struct class *fb_class;
1534 EXPORT_SYMBOL(fb_class);
1536 static int fb_check_foreignness(struct fb_info *fi)
1538 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1540 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1543 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1545 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1546 #endif /* __BIG_ENDIAN */
1548 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1549 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1550 "support this framebuffer\n", fi->fix.id);
1552 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1553 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1554 "support this framebuffer\n", fi->fix.id);
1561 static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1563 /* is the generic aperture base the same as the HW one */
1564 if (gen->base == hw->base)
1566 /* is the generic aperture base inside the hw base->hw base+size */
1567 if (gen->base > hw->base && gen->base < hw->base + hw->size)
1572 static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1573 struct apertures_struct *hwa)
1579 for (i = 0; i < hwa->count; ++i) {
1580 struct aperture *h = &hwa->ranges[i];
1581 for (j = 0; j < gena->count; ++j) {
1582 struct aperture *g = &gena->ranges[j];
1583 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1584 (unsigned long long)g->base,
1585 (unsigned long long)g->size,
1586 (unsigned long long)h->base,
1587 (unsigned long long)h->size);
1588 if (apertures_overlap(g, h))
1596 static int do_unregister_framebuffer(struct fb_info *fb_info);
1598 #define VGA_FB_PHYS 0xA0000
1599 static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
1600 const char *name, bool primary)
1604 /* check all firmware fbs and kick off if the base addr overlaps */
1605 for (i = 0 ; i < FB_MAX; i++) {
1606 struct apertures_struct *gen_aper;
1607 if (!registered_fb[i])
1610 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1613 gen_aper = registered_fb[i]->apertures;
1614 if (fb_do_apertures_overlap(gen_aper, a) ||
1615 (primary && gen_aper && gen_aper->count &&
1616 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1618 printk(KERN_INFO "fb: switching to %s from %s\n",
1619 name, registered_fb[i]->fix.id);
1620 ret = do_unregister_framebuffer(registered_fb[i]);
1629 static bool lockless_register_fb;
1630 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
1631 MODULE_PARM_DESC(lockless_register_fb,
1632 "Lockless framebuffer registration for debugging [default=off]");
1634 static int do_register_framebuffer(struct fb_info *fb_info)
1637 struct fb_event event;
1638 struct fb_videomode mode;
1640 if (fb_check_foreignness(fb_info))
1643 ret = do_remove_conflicting_framebuffers(fb_info->apertures,
1645 fb_is_primary_device(fb_info));
1649 if (num_registered_fb == FB_MAX)
1652 num_registered_fb++;
1653 for (i = 0 ; i < FB_MAX; i++)
1654 if (!registered_fb[i])
1657 atomic_set(&fb_info->count, 1);
1658 mutex_init(&fb_info->lock);
1659 mutex_init(&fb_info->mm_lock);
1661 fb_info->dev = device_create(fb_class, fb_info->device,
1662 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1663 if (IS_ERR(fb_info->dev)) {
1665 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1666 fb_info->dev = NULL;
1668 fb_init_device(fb_info);
1670 if (fb_info->pixmap.addr == NULL) {
1671 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1672 if (fb_info->pixmap.addr) {
1673 fb_info->pixmap.size = FBPIXMAPSIZE;
1674 fb_info->pixmap.buf_align = 1;
1675 fb_info->pixmap.scan_align = 1;
1676 fb_info->pixmap.access_align = 32;
1677 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1680 fb_info->pixmap.offset = 0;
1682 if (!fb_info->pixmap.blit_x)
1683 fb_info->pixmap.blit_x = ~(u32)0;
1685 if (!fb_info->pixmap.blit_y)
1686 fb_info->pixmap.blit_y = ~(u32)0;
1688 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1689 INIT_LIST_HEAD(&fb_info->modelist);
1691 if (fb_info->skip_vt_switch)
1692 pm_vt_switch_required(fb_info->dev, false);
1694 pm_vt_switch_required(fb_info->dev, true);
1696 fb_var_to_videomode(&mode, &fb_info->var);
1697 fb_add_videomode(&mode, &fb_info->modelist);
1698 registered_fb[i] = fb_info;
1700 event.info = fb_info;
1701 if (!lockless_register_fb)
1703 if (!lock_fb_info(fb_info)) {
1704 if (!lockless_register_fb)
1709 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1710 unlock_fb_info(fb_info);
1711 if (!lockless_register_fb)
1716 static int unbind_console(struct fb_info *fb_info)
1718 struct fb_event event;
1720 int i = fb_info->node;
1722 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
1726 if (!lock_fb_info(fb_info)) {
1731 event.info = fb_info;
1732 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1733 unlock_fb_info(fb_info);
1739 static int __unlink_framebuffer(struct fb_info *fb_info);
1741 static int do_unregister_framebuffer(struct fb_info *fb_info)
1743 struct fb_event event;
1746 ret = unbind_console(fb_info);
1751 pm_vt_switch_unregister(fb_info->dev);
1753 __unlink_framebuffer(fb_info);
1754 if (fb_info->pixmap.addr &&
1755 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1756 kfree(fb_info->pixmap.addr);
1757 fb_destroy_modelist(&fb_info->modelist);
1758 registered_fb[fb_info->node] = NULL;
1759 num_registered_fb--;
1760 fb_cleanup_device(fb_info);
1761 event.info = fb_info;
1763 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1766 /* this may free fb info */
1767 put_fb_info(fb_info);
1771 static int __unlink_framebuffer(struct fb_info *fb_info)
1776 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
1780 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1781 fb_info->dev = NULL;
1787 int unlink_framebuffer(struct fb_info *fb_info)
1791 ret = __unlink_framebuffer(fb_info);
1795 unbind_console(fb_info);
1799 EXPORT_SYMBOL(unlink_framebuffer);
1801 int remove_conflicting_framebuffers(struct apertures_struct *a,
1802 const char *name, bool primary)
1806 mutex_lock(®istration_lock);
1807 ret = do_remove_conflicting_framebuffers(a, name, primary);
1808 mutex_unlock(®istration_lock);
1812 EXPORT_SYMBOL(remove_conflicting_framebuffers);
1815 * register_framebuffer - registers a frame buffer device
1816 * @fb_info: frame buffer info structure
1818 * Registers a frame buffer device @fb_info.
1820 * Returns negative errno on error, or zero for success.
1824 register_framebuffer(struct fb_info *fb_info)
1828 mutex_lock(®istration_lock);
1829 ret = do_register_framebuffer(fb_info);
1830 mutex_unlock(®istration_lock);
1834 EXPORT_SYMBOL(register_framebuffer);
1837 * unregister_framebuffer - releases a frame buffer device
1838 * @fb_info: frame buffer info structure
1840 * Unregisters a frame buffer device @fb_info.
1842 * Returns negative errno on error, or zero for success.
1844 * This function will also notify the framebuffer console
1845 * to release the driver.
1847 * This is meant to be called within a driver's module_exit()
1848 * function. If this is called outside module_exit(), ensure
1849 * that the driver implements fb_open() and fb_release() to
1850 * check that no processes are using the device.
1853 unregister_framebuffer(struct fb_info *fb_info)
1857 mutex_lock(®istration_lock);
1858 ret = do_unregister_framebuffer(fb_info);
1859 mutex_unlock(®istration_lock);
1863 EXPORT_SYMBOL(unregister_framebuffer);
1866 * fb_set_suspend - low level driver signals suspend
1867 * @info: framebuffer affected
1868 * @state: 0 = resuming, !=0 = suspending
1870 * This is meant to be used by low level drivers to
1871 * signal suspend/resume to the core & clients.
1872 * It must be called with the console semaphore held
1874 void fb_set_suspend(struct fb_info *info, int state)
1876 struct fb_event event;
1880 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1881 info->state = FBINFO_STATE_SUSPENDED;
1883 info->state = FBINFO_STATE_RUNNING;
1884 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1887 EXPORT_SYMBOL(fb_set_suspend);
1890 * fbmem_init - init frame buffer subsystem
1892 * Initialize the frame buffer subsystem.
1894 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1903 if (!proc_create("fb", 0, NULL, &fb_proc_fops))
1906 ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
1908 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1912 fb_class = class_create(THIS_MODULE, "graphics");
1913 if (IS_ERR(fb_class)) {
1914 ret = PTR_ERR(fb_class);
1915 pr_warn("Unable to create fb class; errno = %d\n", ret);
1922 unregister_chrdev(FB_MAJOR, "fb");
1924 remove_proc_entry("fb", NULL);
1929 module_init(fbmem_init);
1933 remove_proc_entry("fb", NULL);
1934 class_destroy(fb_class);
1935 unregister_chrdev(FB_MAJOR, "fb");
1938 module_exit(fbmem_exit);
1939 MODULE_LICENSE("GPL");
1940 MODULE_DESCRIPTION("Framebuffer base");
1942 subsys_initcall(fbmem_init);
1945 int fb_new_modelist(struct fb_info *info)
1947 struct fb_event event;
1948 struct fb_var_screeninfo var = info->var;
1949 struct list_head *pos, *n;
1950 struct fb_modelist *modelist;
1951 struct fb_videomode *m, mode;
1954 list_for_each_safe(pos, n, &info->modelist) {
1955 modelist = list_entry(pos, struct fb_modelist, list);
1956 m = &modelist->mode;
1957 fb_videomode_to_var(&var, m);
1958 var.activate = FB_ACTIVATE_TEST;
1959 err = fb_set_var(info, &var);
1960 fb_var_to_videomode(&mode, &var);
1961 if (err || !fb_mode_is_equal(m, &mode)) {
1969 if (!list_empty(&info->modelist)) {
1971 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1977 MODULE_LICENSE("GPL");