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/smp_lock.h>
20 #include <linux/kernel.h>
21 #include <linux/major.h>
22 #include <linux/slab.h>
24 #include <linux/mman.h>
26 #include <linux/init.h>
27 #include <linux/linux_logo.h>
28 #include <linux/proc_fs.h>
29 #include <linux/seq_file.h>
30 #include <linux/console.h>
32 #include <linux/kmod.h>
34 #include <linux/err.h>
35 #include <linux/device.h>
36 #include <linux/efi.h>
38 #include <linux/major.h>
44 * Frame buffer device initialization and setup routines
47 #define FBPIXMAPSIZE (1024 * 8)
49 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
50 int num_registered_fb __read_mostly
;
56 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
57 struct fb_fix_screeninfo
*fix
)
61 if (fix
->visual
== FB_VISUAL_MONO01
||
62 fix
->visual
== FB_VISUAL_MONO10
)
65 if (var
->green
.length
== var
->blue
.length
&&
66 var
->green
.length
== var
->red
.length
&&
67 var
->green
.offset
== var
->blue
.offset
&&
68 var
->green
.offset
== var
->red
.offset
)
69 depth
= var
->green
.length
;
71 depth
= var
->green
.length
+ var
->red
.length
+
77 EXPORT_SYMBOL(fb_get_color_depth
);
80 * Data padding functions.
82 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
84 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
86 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
88 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
89 u32 shift_high
, u32 shift_low
, u32 mod
)
91 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
94 for (i
= height
; i
--; ) {
95 for (j
= 0; j
< idx
; j
++) {
98 tmp
|= *src
>> shift_low
;
100 tmp
= *src
<< shift_high
;
106 tmp
|= *src
>> shift_low
;
108 if (shift_high
< mod
) {
109 tmp
= *src
<< shift_high
;
116 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
119 * we need to lock this section since fb_cursor
120 * may use fb_imageblit()
122 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
124 u32 align
= buf
->buf_align
- 1, offset
;
125 char *addr
= buf
->addr
;
127 /* If IO mapped, we need to sync before access, no sharing of
130 if (buf
->flags
& FB_PIXMAP_IO
) {
131 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
132 info
->fbops
->fb_sync(info
);
136 /* See if we fit in the remaining pixmap space */
137 offset
= buf
->offset
+ align
;
139 if (offset
+ size
> buf
->size
) {
140 /* We do not fit. In order to be able to re-use the buffer,
141 * we must ensure no asynchronous DMA'ing or whatever operation
142 * is in progress, we sync for that.
144 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
145 info
->fbops
->fb_sync(info
);
148 buf
->offset
= offset
+ size
;
156 static inline unsigned safe_shift(unsigned d
, int n
)
158 return n
< 0 ? d
>> -n
: d
<< n
;
161 static void fb_set_logocmap(struct fb_info
*info
,
162 const struct linux_logo
*logo
)
164 struct fb_cmap palette_cmap
;
165 u16 palette_green
[16];
166 u16 palette_blue
[16];
169 const unsigned char *clut
= logo
->clut
;
171 palette_cmap
.start
= 0;
172 palette_cmap
.len
= 16;
173 palette_cmap
.red
= palette_red
;
174 palette_cmap
.green
= palette_green
;
175 palette_cmap
.blue
= palette_blue
;
176 palette_cmap
.transp
= NULL
;
178 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
179 n
= logo
->clutsize
- i
;
180 /* palette_cmap provides space for only 16 colors at once */
183 palette_cmap
.start
= 32 + i
;
184 palette_cmap
.len
= n
;
185 for (j
= 0; j
< n
; ++j
) {
186 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
187 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
188 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
191 fb_set_cmap(&palette_cmap
, info
);
195 static void fb_set_logo_truepalette(struct fb_info
*info
,
196 const struct linux_logo
*logo
,
199 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
200 unsigned char redmask
, greenmask
, bluemask
;
201 int redshift
, greenshift
, blueshift
;
203 const unsigned char *clut
= logo
->clut
;
206 * We have to create a temporary palette since console palette is only
209 /* Bug: Doesn't obey msb_right ... (who needs that?) */
210 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
211 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
212 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
213 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
214 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
215 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
217 for ( i
= 0; i
< logo
->clutsize
; i
++) {
218 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
219 safe_shift((clut
[1] & greenmask
), greenshift
) |
220 safe_shift((clut
[2] & bluemask
), blueshift
));
225 static void fb_set_logo_directpalette(struct fb_info
*info
,
226 const struct linux_logo
*logo
,
229 int redshift
, greenshift
, blueshift
;
232 redshift
= info
->var
.red
.offset
;
233 greenshift
= info
->var
.green
.offset
;
234 blueshift
= info
->var
.blue
.offset
;
236 for (i
= 32; i
< logo
->clutsize
; i
++)
237 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
240 static void fb_set_logo(struct fb_info
*info
,
241 const struct linux_logo
*logo
, u8
*dst
,
245 const u8
*src
= logo
->data
;
246 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
249 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
261 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
262 info
->fix
.visual
== FB_VISUAL_MONO10
)
263 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
267 for (i
= 0; i
< logo
->height
; i
++)
268 for (j
= 0; j
< logo
->width
; src
++) {
271 if (j
< logo
->width
) {
272 *dst
++ = *src
& 0x0f;
278 for (i
= 0; i
< logo
->height
; i
++) {
279 for (j
= 0; j
< logo
->width
; src
++) {
281 for (k
= 7; k
>= 0; k
--) {
282 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
292 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
293 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
294 * the visual format and color depth of the framebuffer, the DAC, the
295 * pseudo_palette, and the logo data will be adjusted accordingly.
297 * Case 1 - linux_logo_clut224:
298 * Color exceeds the number of console colors (16), thus we set the hardware DAC
299 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
301 * For visuals that require color info from the pseudo_palette, we also construct
302 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
305 * Case 2 - linux_logo_vga16:
306 * The number of colors just matches the console colors, thus there is no need
307 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
308 * each byte contains color information for two pixels (upper and lower nibble).
309 * To be consistent with fb_imageblit() usage, we therefore separate the two
310 * nibbles into separate bytes. The "depth" flag will be set to 4.
312 * Case 3 - linux_logo_mono:
313 * This is similar with Case 2. Each byte contains information for 8 pixels.
314 * We isolate each bit and expand each into a byte. The "depth" flag will
317 static struct logo_data
{
319 int needs_directpalette
;
320 int needs_truepalette
;
322 const struct linux_logo
*logo
;
323 } fb_logo __read_mostly
;
325 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
327 u32 size
= width
* height
, i
;
331 for (i
= size
; i
--; )
335 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
337 int i
, j
, h
= height
- 1;
339 for (i
= 0; i
< height
; i
++)
340 for (j
= 0; j
< width
; j
++)
341 out
[height
* j
+ h
- i
] = *in
++;
344 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
346 int i
, j
, w
= width
- 1;
348 for (i
= 0; i
< height
; i
++)
349 for (j
= 0; j
< width
; j
++)
350 out
[height
* (w
- j
) + i
] = *in
++;
353 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
354 struct fb_image
*image
, int rotate
)
358 if (rotate
== FB_ROTATE_UD
) {
359 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
361 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
362 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
363 } else if (rotate
== FB_ROTATE_CW
) {
364 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
367 image
->width
= image
->height
;
370 image
->dy
= image
->dx
;
371 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
372 } else if (rotate
== FB_ROTATE_CCW
) {
373 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
376 image
->width
= image
->height
;
379 image
->dx
= image
->dy
;
380 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
386 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
387 int rotate
, unsigned int num
)
391 if (rotate
== FB_ROTATE_UR
) {
393 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
395 info
->fbops
->fb_imageblit(info
, image
);
396 image
->dx
+= image
->width
+ 8;
398 } else if (rotate
== FB_ROTATE_UD
) {
399 for (x
= 0; x
< num
&& image
->dx
>= 0; x
++) {
400 info
->fbops
->fb_imageblit(info
, image
);
401 image
->dx
-= image
->width
+ 8;
403 } else if (rotate
== FB_ROTATE_CW
) {
405 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
407 info
->fbops
->fb_imageblit(info
, image
);
408 image
->dy
+= image
->height
+ 8;
410 } else if (rotate
== FB_ROTATE_CCW
) {
411 for (x
= 0; x
< num
&& image
->dy
>= 0; x
++) {
412 info
->fbops
->fb_imageblit(info
, image
);
413 image
->dy
-= image
->height
+ 8;
418 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
419 const struct linux_logo
*logo
, int y
,
422 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
423 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
424 struct fb_image image
;
426 /* Return if the frame buffer is not mapped or suspended */
427 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
428 info
->flags
& FBINFO_MODULE
)
432 image
.data
= logo
->data
;
434 if (fb_logo
.needs_cmapreset
)
435 fb_set_logocmap(info
, logo
);
437 if (fb_logo
.needs_truepalette
||
438 fb_logo
.needs_directpalette
) {
439 palette
= kmalloc(256 * 4, GFP_KERNEL
);
443 if (fb_logo
.needs_truepalette
)
444 fb_set_logo_truepalette(info
, logo
, palette
);
446 fb_set_logo_directpalette(info
, logo
, palette
);
448 saved_pseudo_palette
= info
->pseudo_palette
;
449 info
->pseudo_palette
= palette
;
452 if (fb_logo
.depth
<= 4) {
453 logo_new
= kmalloc(logo
->width
* logo
->height
, GFP_KERNEL
);
454 if (logo_new
== NULL
) {
456 if (saved_pseudo_palette
)
457 info
->pseudo_palette
= saved_pseudo_palette
;
460 image
.data
= logo_new
;
461 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
466 image
.width
= logo
->width
;
467 image
.height
= logo
->height
;
470 logo_rotate
= kmalloc(logo
->width
*
471 logo
->height
, GFP_KERNEL
);
473 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
476 fb_do_show_logo(info
, &image
, rotate
, n
);
479 if (saved_pseudo_palette
!= NULL
)
480 info
->pseudo_palette
= saved_pseudo_palette
;
487 #ifdef CONFIG_FB_LOGO_EXTRA
489 #define FB_LOGO_EX_NUM_MAX 10
490 static struct logo_data_extra
{
491 const struct linux_logo
*logo
;
493 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
494 static unsigned int fb_logo_ex_num
;
496 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
498 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
501 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
502 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
506 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
511 /* FIXME: logo_ex supports only truecolor fb. */
512 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
515 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
516 height
+= fb_logo_ex
[i
].logo
->height
;
518 height
-= fb_logo_ex
[i
].logo
->height
;
526 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
530 for (i
= 0; i
< fb_logo_ex_num
; i
++)
531 y
+= fb_show_logo_line(info
, rotate
,
532 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
537 #else /* !CONFIG_FB_LOGO_EXTRA */
539 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
546 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
551 #endif /* CONFIG_FB_LOGO_EXTRA */
554 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
556 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
559 memset(&fb_logo
, 0, sizeof(struct logo_data
));
561 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
562 info
->flags
& FBINFO_MODULE
)
565 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
566 depth
= info
->var
.blue
.length
;
567 if (info
->var
.red
.length
< depth
)
568 depth
= info
->var
.red
.length
;
569 if (info
->var
.green
.length
< depth
)
570 depth
= info
->var
.green
.length
;
573 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
574 /* assume console colormap */
578 /* Return if no suitable logo was found */
579 fb_logo
.logo
= fb_find_logo(depth
);
585 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
586 yres
= info
->var
.yres
;
588 yres
= info
->var
.xres
;
590 if (fb_logo
.logo
->height
> yres
) {
595 /* What depth we asked for might be different from what we get */
596 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
598 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
604 if (fb_logo
.depth
> 4 && depth
> 4) {
605 switch (info
->fix
.visual
) {
606 case FB_VISUAL_TRUECOLOR
:
607 fb_logo
.needs_truepalette
= 1;
609 case FB_VISUAL_DIRECTCOLOR
:
610 fb_logo
.needs_directpalette
= 1;
611 fb_logo
.needs_cmapreset
= 1;
613 case FB_VISUAL_PSEUDOCOLOR
:
614 fb_logo
.needs_cmapreset
= 1;
619 return fb_prepare_extra_logos(info
, fb_logo
.logo
->height
, yres
);
622 int fb_show_logo(struct fb_info
*info
, int rotate
)
626 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
628 y
= fb_show_extra_logos(info
, y
, rotate
);
633 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
634 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
635 #endif /* CONFIG_LOGO */
637 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
639 return (*pos
< FB_MAX
) ? pos
: NULL
;
642 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
645 return (*pos
< FB_MAX
) ? pos
: NULL
;
648 static void fb_seq_stop(struct seq_file
*m
, void *v
)
652 static int fb_seq_show(struct seq_file
*m
, void *v
)
654 int i
= *(loff_t
*)v
;
655 struct fb_info
*fi
= registered_fb
[i
];
658 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
662 static const struct seq_operations proc_fb_seq_ops
= {
663 .start
= fb_seq_start
,
669 static int proc_fb_open(struct inode
*inode
, struct file
*file
)
671 return seq_open(file
, &proc_fb_seq_ops
);
674 static const struct file_operations fb_proc_fops
= {
675 .owner
= THIS_MODULE
,
676 .open
= proc_fb_open
,
679 .release
= seq_release
,
683 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
685 unsigned long p
= *ppos
;
686 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
687 int fbidx
= iminor(inode
);
688 struct fb_info
*info
= registered_fb
[fbidx
];
691 int c
, i
, cnt
= 0, err
= 0;
692 unsigned long total_size
;
694 if (!info
|| ! info
->screen_base
)
697 if (info
->state
!= FBINFO_STATE_RUNNING
)
700 if (info
->fbops
->fb_read
)
701 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
703 total_size
= info
->screen_size
;
706 total_size
= info
->fix
.smem_len
;
711 if (count
>= total_size
)
714 if (count
+ p
> total_size
)
715 count
= total_size
- p
;
717 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
722 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
724 if (info
->fbops
->fb_sync
)
725 info
->fbops
->fb_sync(info
);
728 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
730 for (i
= c
>> 2; i
--; )
731 *dst
++ = fb_readl(src
++);
733 u8
*dst8
= (u8
*) dst
;
734 u8 __iomem
*src8
= (u8 __iomem
*) src
;
736 for (i
= c
& 3; i
--;)
737 *dst8
++ = fb_readb(src8
++);
739 src
= (u32 __iomem
*) src8
;
742 if (copy_to_user(buf
, buffer
, c
)) {
754 return (err
) ? err
: cnt
;
758 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
760 unsigned long p
= *ppos
;
761 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
762 int fbidx
= iminor(inode
);
763 struct fb_info
*info
= registered_fb
[fbidx
];
766 int c
, i
, cnt
= 0, err
= 0;
767 unsigned long total_size
;
769 if (!info
|| !info
->screen_base
)
772 if (info
->state
!= FBINFO_STATE_RUNNING
)
775 if (info
->fbops
->fb_write
)
776 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
778 total_size
= info
->screen_size
;
781 total_size
= info
->fix
.smem_len
;
786 if (count
> total_size
) {
791 if (count
+ p
> total_size
) {
795 count
= total_size
- p
;
798 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
803 dst
= (u32 __iomem
*) (info
->screen_base
+ p
);
805 if (info
->fbops
->fb_sync
)
806 info
->fbops
->fb_sync(info
);
809 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
812 if (copy_from_user(src
, buf
, c
)) {
817 for (i
= c
>> 2; i
--; )
818 fb_writel(*src
++, dst
++);
821 u8
*src8
= (u8
*) src
;
822 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
824 for (i
= c
& 3; i
--; )
825 fb_writeb(*src8
++, dst8
++);
827 dst
= (u32 __iomem
*) dst8
;
838 return (cnt
) ? cnt
: err
;
842 static void try_to_load(int fb
)
844 request_module("fb%d", fb
);
846 #endif /* CONFIG_KMOD */
849 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
851 struct fb_fix_screeninfo
*fix
= &info
->fix
;
852 unsigned int yres
= info
->var
.yres
;
855 if (var
->yoffset
> 0) {
856 if (var
->vmode
& FB_VMODE_YWRAP
) {
857 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
861 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
865 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
866 (var
->xoffset
% fix
->xpanstep
)))
869 if (err
|| !info
->fbops
->fb_pan_display
||
870 var
->yoffset
+ yres
> info
->var
.yres_virtual
||
871 var
->xoffset
+ info
->var
.xres
> info
->var
.xres_virtual
)
874 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
876 info
->var
.xoffset
= var
->xoffset
;
877 info
->var
.yoffset
= var
->yoffset
;
878 if (var
->vmode
& FB_VMODE_YWRAP
)
879 info
->var
.vmode
|= FB_VMODE_YWRAP
;
881 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
885 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
888 struct fb_event event
;
889 struct fb_blit_caps caps
, fbcaps
;
892 memset(&caps
, 0, sizeof(caps
));
893 memset(&fbcaps
, 0, sizeof(fbcaps
));
894 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
897 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
898 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
900 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
901 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
902 (fbcaps
.len
< caps
.len
))
909 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
911 int flags
= info
->flags
;
914 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
915 struct fb_videomode mode1
, mode2
;
917 fb_var_to_videomode(&mode1
, var
);
918 fb_var_to_videomode(&mode2
, &info
->var
);
919 /* make sure we don't delete the videomode of current var */
920 ret
= fb_mode_is_equal(&mode1
, &mode2
);
923 struct fb_event event
;
927 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
931 fb_delete_videomode(&mode1
, &info
->modelist
);
934 ret
= (ret
) ? -EINVAL
: 0;
938 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
939 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
940 u32 activate
= var
->activate
;
942 if (!info
->fbops
->fb_check_var
) {
947 ret
= info
->fbops
->fb_check_var(var
, info
);
952 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
953 struct fb_videomode mode
;
955 if (info
->fbops
->fb_get_caps
) {
956 ret
= fb_check_caps(info
, var
, activate
);
964 if (info
->fbops
->fb_set_par
)
965 info
->fbops
->fb_set_par(info
);
967 fb_pan_display(info
, &info
->var
);
968 fb_set_cmap(&info
->cmap
, info
);
969 fb_var_to_videomode(&mode
, &info
->var
);
971 if (info
->modelist
.prev
&& info
->modelist
.next
&&
972 !list_empty(&info
->modelist
))
973 ret
= fb_add_videomode(&mode
, &info
->modelist
);
975 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
976 struct fb_event event
;
977 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
978 FB_EVENT_MODE_CHANGE_ALL
:
979 FB_EVENT_MODE_CHANGE
;
981 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
983 fb_notifier_call_chain(evnt
, &event
);
993 fb_blank(struct fb_info
*info
, int blank
)
997 if (blank
> FB_BLANK_POWERDOWN
)
998 blank
= FB_BLANK_POWERDOWN
;
1000 if (info
->fbops
->fb_blank
)
1001 ret
= info
->fbops
->fb_blank(blank
, info
);
1004 struct fb_event event
;
1007 event
.data
= &blank
;
1008 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1015 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
1018 int fbidx
= iminor(inode
);
1019 struct fb_info
*info
= registered_fb
[fbidx
];
1020 struct fb_ops
*fb
= info
->fbops
;
1021 struct fb_var_screeninfo var
;
1022 struct fb_fix_screeninfo fix
;
1023 struct fb_con2fbmap con2fb
;
1024 struct fb_cmap_user cmap
;
1025 struct fb_event event
;
1026 void __user
*argp
= (void __user
*)arg
;
1032 case FBIOGET_VSCREENINFO
:
1033 return copy_to_user(argp
, &info
->var
,
1034 sizeof(var
)) ? -EFAULT
: 0;
1035 case FBIOPUT_VSCREENINFO
:
1036 if (copy_from_user(&var
, argp
, sizeof(var
)))
1038 acquire_console_sem();
1039 info
->flags
|= FBINFO_MISC_USEREVENT
;
1040 i
= fb_set_var(info
, &var
);
1041 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1042 release_console_sem();
1044 if (copy_to_user(argp
, &var
, sizeof(var
)))
1047 case FBIOGET_FSCREENINFO
:
1048 return copy_to_user(argp
, &info
->fix
,
1049 sizeof(fix
)) ? -EFAULT
: 0;
1051 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1053 return (fb_set_user_cmap(&cmap
, info
));
1055 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1057 return fb_cmap_to_user(&info
->cmap
, &cmap
);
1058 case FBIOPAN_DISPLAY
:
1059 if (copy_from_user(&var
, argp
, sizeof(var
)))
1061 acquire_console_sem();
1062 i
= fb_pan_display(info
, &var
);
1063 release_console_sem();
1066 if (copy_to_user(argp
, &var
, sizeof(var
)))
1071 case FBIOGET_CON2FBMAP
:
1072 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1074 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1076 con2fb
.framebuffer
= -1;
1078 event
.data
= &con2fb
;
1079 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
1080 return copy_to_user(argp
, &con2fb
,
1081 sizeof(con2fb
)) ? -EFAULT
: 0;
1082 case FBIOPUT_CON2FBMAP
:
1083 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1085 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1087 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
1090 if (!registered_fb
[con2fb
.framebuffer
])
1091 try_to_load(con2fb
.framebuffer
);
1092 #endif /* CONFIG_KMOD */
1093 if (!registered_fb
[con2fb
.framebuffer
])
1096 event
.data
= &con2fb
;
1097 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
,
1100 acquire_console_sem();
1101 info
->flags
|= FBINFO_MISC_USEREVENT
;
1102 i
= fb_blank(info
, arg
);
1103 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1104 release_console_sem();
1107 if (fb
->fb_ioctl
== NULL
)
1109 return fb
->fb_ioctl(info
, cmd
, arg
);
1113 #ifdef CONFIG_COMPAT
1114 struct fb_fix_screeninfo32
{
1116 compat_caddr_t smem_start
;
1125 compat_caddr_t mmio_start
;
1135 compat_caddr_t green
;
1136 compat_caddr_t blue
;
1137 compat_caddr_t transp
;
1140 static int fb_getput_cmap(struct inode
*inode
, struct file
*file
,
1141 unsigned int cmd
, unsigned long arg
)
1143 struct fb_cmap_user __user
*cmap
;
1144 struct fb_cmap32 __user
*cmap32
;
1148 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1149 cmap32
= compat_ptr(arg
);
1151 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1154 if (get_user(data
, &cmap32
->red
) ||
1155 put_user(compat_ptr(data
), &cmap
->red
) ||
1156 get_user(data
, &cmap32
->green
) ||
1157 put_user(compat_ptr(data
), &cmap
->green
) ||
1158 get_user(data
, &cmap32
->blue
) ||
1159 put_user(compat_ptr(data
), &cmap
->blue
) ||
1160 get_user(data
, &cmap32
->transp
) ||
1161 put_user(compat_ptr(data
), &cmap
->transp
))
1164 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) cmap
);
1167 if (copy_in_user(&cmap32
->start
,
1175 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1176 struct fb_fix_screeninfo32 __user
*fix32
)
1181 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1183 data
= (__u32
) (unsigned long) fix
->smem_start
;
1184 err
|= put_user(data
, &fix32
->smem_start
);
1186 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1187 err
|= put_user(fix
->type
, &fix32
->type
);
1188 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1189 err
|= put_user(fix
->visual
, &fix32
->visual
);
1190 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1191 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1192 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1193 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1195 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1196 err
|= put_user(data
, &fix32
->mmio_start
);
1198 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1199 err
|= put_user(fix
->accel
, &fix32
->accel
);
1200 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1201 sizeof(fix
->reserved
));
1206 static int fb_get_fscreeninfo(struct inode
*inode
, struct file
*file
,
1207 unsigned int cmd
, unsigned long arg
)
1209 mm_segment_t old_fs
;
1210 struct fb_fix_screeninfo fix
;
1211 struct fb_fix_screeninfo32 __user
*fix32
;
1214 fix32
= compat_ptr(arg
);
1218 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) &fix
);
1222 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1228 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1230 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1231 int fbidx
= iminor(inode
);
1232 struct fb_info
*info
= registered_fb
[fbidx
];
1233 struct fb_ops
*fb
= info
->fbops
;
1234 long ret
= -ENOIOCTLCMD
;
1238 case FBIOGET_VSCREENINFO
:
1239 case FBIOPUT_VSCREENINFO
:
1240 case FBIOPAN_DISPLAY
:
1241 case FBIOGET_CON2FBMAP
:
1242 case FBIOPUT_CON2FBMAP
:
1243 arg
= (unsigned long) compat_ptr(arg
);
1245 ret
= fb_ioctl(inode
, file
, cmd
, arg
);
1248 case FBIOGET_FSCREENINFO
:
1249 ret
= fb_get_fscreeninfo(inode
, file
, cmd
, arg
);
1254 ret
= fb_getput_cmap(inode
, file
, cmd
, arg
);
1258 if (fb
->fb_compat_ioctl
)
1259 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1268 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1270 int fbidx
= iminor(file
->f_path
.dentry
->d_inode
);
1271 struct fb_info
*info
= registered_fb
[fbidx
];
1272 struct fb_ops
*fb
= info
->fbops
;
1274 unsigned long start
;
1277 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1279 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1285 res
= fb
->fb_mmap(info
, vma
);
1292 /* frame buffer memory */
1293 start
= info
->fix
.smem_start
;
1294 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1296 /* memory mapped io */
1298 if (info
->var
.accel_flags
) {
1302 start
= info
->fix
.mmio_start
;
1303 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1307 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1310 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1311 /* This is an IO map - tell maydump to skip this VMA */
1312 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1313 fb_pgprotect(file
, vma
, off
);
1314 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1315 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1321 fb_open(struct inode
*inode
, struct file
*file
)
1323 int fbidx
= iminor(inode
);
1324 struct fb_info
*info
;
1327 if (fbidx
>= FB_MAX
)
1331 if (!(info
= registered_fb
[fbidx
]))
1333 #endif /* CONFIG_KMOD */
1334 if (!(info
= registered_fb
[fbidx
])) {
1338 if (!try_module_get(info
->fbops
->owner
)) {
1342 file
->private_data
= info
;
1343 if (info
->fbops
->fb_open
) {
1344 res
= info
->fbops
->fb_open(info
,1);
1346 module_put(info
->fbops
->owner
);
1354 fb_release(struct inode
*inode
, struct file
*file
)
1356 struct fb_info
* const info
= file
->private_data
;
1359 if (info
->fbops
->fb_release
)
1360 info
->fbops
->fb_release(info
,1);
1361 module_put(info
->fbops
->owner
);
1366 static const struct file_operations fb_fops
= {
1367 .owner
= THIS_MODULE
,
1371 #ifdef CONFIG_COMPAT
1372 .compat_ioctl
= fb_compat_ioctl
,
1376 .release
= fb_release
,
1377 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1378 .get_unmapped_area
= get_fb_unmapped_area
,
1380 #ifdef CONFIG_FB_DEFERRED_IO
1381 .fsync
= fb_deferred_io_fsync
,
1385 struct class *fb_class
;
1386 EXPORT_SYMBOL(fb_class
);
1388 static int fb_check_foreignness(struct fb_info
*fi
)
1390 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1392 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1395 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1397 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1398 #endif /* __BIG_ENDIAN */
1400 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1401 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1402 "support this framebuffer\n", fi
->fix
.id
);
1404 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1405 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1406 "support this framebuffer\n", fi
->fix
.id
);
1414 * register_framebuffer - registers a frame buffer device
1415 * @fb_info: frame buffer info structure
1417 * Registers a frame buffer device @fb_info.
1419 * Returns negative errno on error, or zero for success.
1424 register_framebuffer(struct fb_info
*fb_info
)
1427 struct fb_event event
;
1428 struct fb_videomode mode
;
1430 if (num_registered_fb
== FB_MAX
)
1433 if (fb_check_foreignness(fb_info
))
1436 num_registered_fb
++;
1437 for (i
= 0 ; i
< FB_MAX
; i
++)
1438 if (!registered_fb
[i
])
1442 fb_info
->dev
= device_create_drvdata(fb_class
, fb_info
->device
,
1443 MKDEV(FB_MAJOR
, i
), NULL
,
1445 if (IS_ERR(fb_info
->dev
)) {
1447 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1448 fb_info
->dev
= NULL
;
1450 fb_init_device(fb_info
);
1452 if (fb_info
->pixmap
.addr
== NULL
) {
1453 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1454 if (fb_info
->pixmap
.addr
) {
1455 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1456 fb_info
->pixmap
.buf_align
= 1;
1457 fb_info
->pixmap
.scan_align
= 1;
1458 fb_info
->pixmap
.access_align
= 32;
1459 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1462 fb_info
->pixmap
.offset
= 0;
1464 if (!fb_info
->pixmap
.blit_x
)
1465 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1467 if (!fb_info
->pixmap
.blit_y
)
1468 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1470 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1471 INIT_LIST_HEAD(&fb_info
->modelist
);
1473 fb_var_to_videomode(&mode
, &fb_info
->var
);
1474 fb_add_videomode(&mode
, &fb_info
->modelist
);
1475 registered_fb
[i
] = fb_info
;
1477 event
.info
= fb_info
;
1478 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1484 * unregister_framebuffer - releases a frame buffer device
1485 * @fb_info: frame buffer info structure
1487 * Unregisters a frame buffer device @fb_info.
1489 * Returns negative errno on error, or zero for success.
1491 * This function will also notify the framebuffer console
1492 * to release the driver.
1494 * This is meant to be called within a driver's module_exit()
1495 * function. If this is called outside module_exit(), ensure
1496 * that the driver implements fb_open() and fb_release() to
1497 * check that no processes are using the device.
1501 unregister_framebuffer(struct fb_info
*fb_info
)
1503 struct fb_event event
;
1507 if (!registered_fb
[i
]) {
1512 event
.info
= fb_info
;
1513 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1520 if (fb_info
->pixmap
.addr
&&
1521 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1522 kfree(fb_info
->pixmap
.addr
);
1523 fb_destroy_modelist(&fb_info
->modelist
);
1524 registered_fb
[i
]=NULL
;
1525 num_registered_fb
--;
1526 fb_cleanup_device(fb_info
);
1527 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1528 event
.info
= fb_info
;
1529 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1535 * fb_set_suspend - low level driver signals suspend
1536 * @info: framebuffer affected
1537 * @state: 0 = resuming, !=0 = suspending
1539 * This is meant to be used by low level drivers to
1540 * signal suspend/resume to the core & clients.
1541 * It must be called with the console semaphore held
1543 void fb_set_suspend(struct fb_info
*info
, int state
)
1545 struct fb_event event
;
1549 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1550 info
->state
= FBINFO_STATE_SUSPENDED
;
1552 info
->state
= FBINFO_STATE_RUNNING
;
1553 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1558 * fbmem_init - init frame buffer subsystem
1560 * Initialize the frame buffer subsystem.
1562 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1569 proc_create("fb", 0, NULL
, &fb_proc_fops
);
1571 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1572 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1574 fb_class
= class_create(THIS_MODULE
, "graphics");
1575 if (IS_ERR(fb_class
)) {
1576 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1583 module_init(fbmem_init
);
1587 remove_proc_entry("fb", NULL
);
1588 class_destroy(fb_class
);
1589 unregister_chrdev(FB_MAJOR
, "fb");
1592 module_exit(fbmem_exit
);
1593 MODULE_LICENSE("GPL");
1594 MODULE_DESCRIPTION("Framebuffer base");
1596 subsys_initcall(fbmem_init
);
1599 int fb_new_modelist(struct fb_info
*info
)
1601 struct fb_event event
;
1602 struct fb_var_screeninfo var
= info
->var
;
1603 struct list_head
*pos
, *n
;
1604 struct fb_modelist
*modelist
;
1605 struct fb_videomode
*m
, mode
;
1608 list_for_each_safe(pos
, n
, &info
->modelist
) {
1609 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1610 m
= &modelist
->mode
;
1611 fb_videomode_to_var(&var
, m
);
1612 var
.activate
= FB_ACTIVATE_TEST
;
1613 err
= fb_set_var(info
, &var
);
1614 fb_var_to_videomode(&mode
, &var
);
1615 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1623 if (!list_empty(&info
->modelist
)) {
1625 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1631 static char *video_options
[FB_MAX
] __read_mostly
;
1632 static int ofonly __read_mostly
;
1635 * fb_get_options - get kernel boot parameters
1636 * @name: framebuffer name as it would appear in
1637 * the boot parameter line
1638 * (video=<name>:<options>)
1639 * @option: the option will be stored here
1641 * NOTE: Needed to maintain backwards compatibility
1643 int fb_get_options(char *name
, char **option
)
1645 char *opt
, *options
= NULL
;
1646 int opt_len
, retval
= 0;
1647 int name_len
= strlen(name
), i
;
1649 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1652 if (name_len
&& !retval
) {
1653 for (i
= 0; i
< FB_MAX
; i
++) {
1654 if (video_options
[i
] == NULL
)
1656 opt_len
= strlen(video_options
[i
]);
1659 opt
= video_options
[i
];
1660 if (!strncmp(name
, opt
, name_len
) &&
1661 opt
[name_len
] == ':')
1662 options
= opt
+ name_len
+ 1;
1665 if (options
&& !strncmp(options
, "off", 3))
1676 * video_setup - process command line options
1677 * @options: string of options
1679 * Process command line options for frame buffer subsystem.
1681 * NOTE: This function is a __setup and __init function.
1682 * It only stores the options. Drivers have to call
1683 * fb_get_options() as necessary.
1688 static int __init
video_setup(char *options
)
1692 if (!options
|| !*options
)
1695 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1700 if (!global
&& !strstr(options
, "fb:")) {
1701 fb_mode_option
= options
;
1706 for (i
= 0; i
< FB_MAX
; i
++) {
1707 if (video_options
[i
] == NULL
) {
1708 video_options
[i
] = options
;
1717 __setup("video=", video_setup
);
1721 * Visible symbols for modules
1724 EXPORT_SYMBOL(register_framebuffer
);
1725 EXPORT_SYMBOL(unregister_framebuffer
);
1726 EXPORT_SYMBOL(num_registered_fb
);
1727 EXPORT_SYMBOL(registered_fb
);
1728 EXPORT_SYMBOL(fb_show_logo
);
1729 EXPORT_SYMBOL(fb_set_var
);
1730 EXPORT_SYMBOL(fb_blank
);
1731 EXPORT_SYMBOL(fb_pan_display
);
1732 EXPORT_SYMBOL(fb_get_buffer_offset
);
1733 EXPORT_SYMBOL(fb_set_suspend
);
1734 EXPORT_SYMBOL(fb_get_options
);
1736 MODULE_LICENSE("GPL");