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/fbcon.h>
36 #include <linux/mem_encrypt.h>
42 * Frame buffer device initialization and setup routines
45 #define FBPIXMAPSIZE (1024 * 8)
47 static DEFINE_MUTEX(registration_lock
);
49 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
50 EXPORT_SYMBOL(registered_fb
);
52 int num_registered_fb __read_mostly
;
53 EXPORT_SYMBOL(num_registered_fb
);
55 static struct fb_info
*get_fb_info(unsigned int idx
)
57 struct fb_info
*fb_info
;
60 return ERR_PTR(-ENODEV
);
62 mutex_lock(®istration_lock
);
63 fb_info
= registered_fb
[idx
];
65 atomic_inc(&fb_info
->count
);
66 mutex_unlock(®istration_lock
);
71 static void put_fb_info(struct fb_info
*fb_info
)
73 if (!atomic_dec_and_test(&fb_info
->count
))
75 if (fb_info
->fbops
->fb_destroy
)
76 fb_info
->fbops
->fb_destroy(fb_info
);
79 int lock_fb_info(struct fb_info
*info
)
81 mutex_lock(&info
->lock
);
83 mutex_unlock(&info
->lock
);
88 EXPORT_SYMBOL(lock_fb_info
);
94 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
95 struct fb_fix_screeninfo
*fix
)
99 if (fix
->visual
== FB_VISUAL_MONO01
||
100 fix
->visual
== FB_VISUAL_MONO10
)
103 if (var
->green
.length
== var
->blue
.length
&&
104 var
->green
.length
== var
->red
.length
&&
105 var
->green
.offset
== var
->blue
.offset
&&
106 var
->green
.offset
== var
->red
.offset
)
107 depth
= var
->green
.length
;
109 depth
= var
->green
.length
+ var
->red
.length
+
115 EXPORT_SYMBOL(fb_get_color_depth
);
118 * Data padding functions.
120 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
122 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
124 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
126 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
127 u32 shift_high
, u32 shift_low
, u32 mod
)
129 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
132 for (i
= height
; i
--; ) {
133 for (j
= 0; j
< idx
; j
++) {
136 tmp
|= *src
>> shift_low
;
138 tmp
= *src
<< shift_high
;
144 tmp
|= *src
>> shift_low
;
146 if (shift_high
< mod
) {
147 tmp
= *src
<< shift_high
;
154 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
157 * we need to lock this section since fb_cursor
158 * may use fb_imageblit()
160 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
162 u32 align
= buf
->buf_align
- 1, offset
;
163 char *addr
= buf
->addr
;
165 /* If IO mapped, we need to sync before access, no sharing of
168 if (buf
->flags
& FB_PIXMAP_IO
) {
169 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
170 info
->fbops
->fb_sync(info
);
174 /* See if we fit in the remaining pixmap space */
175 offset
= buf
->offset
+ align
;
177 if (offset
+ size
> buf
->size
) {
178 /* We do not fit. In order to be able to re-use the buffer,
179 * we must ensure no asynchronous DMA'ing or whatever operation
180 * is in progress, we sync for that.
182 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
183 info
->fbops
->fb_sync(info
);
186 buf
->offset
= offset
+ size
;
191 EXPORT_SYMBOL(fb_get_buffer_offset
);
195 static inline unsigned safe_shift(unsigned d
, int n
)
197 return n
< 0 ? d
>> -n
: d
<< n
;
200 static void fb_set_logocmap(struct fb_info
*info
,
201 const struct linux_logo
*logo
)
203 struct fb_cmap palette_cmap
;
204 u16 palette_green
[16];
205 u16 palette_blue
[16];
208 const unsigned char *clut
= logo
->clut
;
210 palette_cmap
.start
= 0;
211 palette_cmap
.len
= 16;
212 palette_cmap
.red
= palette_red
;
213 palette_cmap
.green
= palette_green
;
214 palette_cmap
.blue
= palette_blue
;
215 palette_cmap
.transp
= NULL
;
217 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
218 n
= logo
->clutsize
- i
;
219 /* palette_cmap provides space for only 16 colors at once */
222 palette_cmap
.start
= 32 + i
;
223 palette_cmap
.len
= n
;
224 for (j
= 0; j
< n
; ++j
) {
225 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
226 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
227 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
230 fb_set_cmap(&palette_cmap
, info
);
234 static void fb_set_logo_truepalette(struct fb_info
*info
,
235 const struct linux_logo
*logo
,
238 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
239 unsigned char redmask
, greenmask
, bluemask
;
240 int redshift
, greenshift
, blueshift
;
242 const unsigned char *clut
= logo
->clut
;
245 * We have to create a temporary palette since console palette is only
248 /* Bug: Doesn't obey msb_right ... (who needs that?) */
249 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
250 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
251 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
252 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
253 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
254 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
256 for ( i
= 0; i
< logo
->clutsize
; i
++) {
257 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
258 safe_shift((clut
[1] & greenmask
), greenshift
) |
259 safe_shift((clut
[2] & bluemask
), blueshift
));
264 static void fb_set_logo_directpalette(struct fb_info
*info
,
265 const struct linux_logo
*logo
,
268 int redshift
, greenshift
, blueshift
;
271 redshift
= info
->var
.red
.offset
;
272 greenshift
= info
->var
.green
.offset
;
273 blueshift
= info
->var
.blue
.offset
;
275 for (i
= 32; i
< 32 + logo
->clutsize
; i
++)
276 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
279 static void fb_set_logo(struct fb_info
*info
,
280 const struct linux_logo
*logo
, u8
*dst
,
284 const u8
*src
= logo
->data
;
285 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
288 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
300 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
301 info
->fix
.visual
== FB_VISUAL_MONO10
)
302 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
306 for (i
= 0; i
< logo
->height
; i
++)
307 for (j
= 0; j
< logo
->width
; src
++) {
310 if (j
< logo
->width
) {
311 *dst
++ = *src
& 0x0f;
317 for (i
= 0; i
< logo
->height
; i
++) {
318 for (j
= 0; j
< logo
->width
; src
++) {
320 for (k
= 7; k
>= 0 && j
< logo
->width
; k
--) {
321 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
331 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
332 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
333 * the visual format and color depth of the framebuffer, the DAC, the
334 * pseudo_palette, and the logo data will be adjusted accordingly.
336 * Case 1 - linux_logo_clut224:
337 * Color exceeds the number of console colors (16), thus we set the hardware DAC
338 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
340 * For visuals that require color info from the pseudo_palette, we also construct
341 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
344 * Case 2 - linux_logo_vga16:
345 * The number of colors just matches the console colors, thus there is no need
346 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
347 * each byte contains color information for two pixels (upper and lower nibble).
348 * To be consistent with fb_imageblit() usage, we therefore separate the two
349 * nibbles into separate bytes. The "depth" flag will be set to 4.
351 * Case 3 - linux_logo_mono:
352 * This is similar with Case 2. Each byte contains information for 8 pixels.
353 * We isolate each bit and expand each into a byte. The "depth" flag will
356 static struct logo_data
{
358 int needs_directpalette
;
359 int needs_truepalette
;
361 const struct linux_logo
*logo
;
362 } fb_logo __read_mostly
;
364 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
366 u32 size
= width
* height
, i
;
370 for (i
= size
; i
--; )
374 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
376 int i
, j
, h
= height
- 1;
378 for (i
= 0; i
< height
; i
++)
379 for (j
= 0; j
< width
; j
++)
380 out
[height
* j
+ h
- i
] = *in
++;
383 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
385 int i
, j
, w
= width
- 1;
387 for (i
= 0; i
< height
; i
++)
388 for (j
= 0; j
< width
; j
++)
389 out
[height
* (w
- j
) + i
] = *in
++;
392 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
393 struct fb_image
*image
, int rotate
)
397 if (rotate
== FB_ROTATE_UD
) {
398 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
400 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
401 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
402 } else if (rotate
== FB_ROTATE_CW
) {
403 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
406 image
->width
= image
->height
;
409 image
->dy
= image
->dx
;
410 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
411 } else if (rotate
== FB_ROTATE_CCW
) {
412 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
415 image
->width
= image
->height
;
418 image
->dx
= image
->dy
;
419 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
425 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
426 int rotate
, unsigned int num
)
430 if (rotate
== FB_ROTATE_UR
) {
432 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
434 info
->fbops
->fb_imageblit(info
, image
);
435 image
->dx
+= image
->width
+ 8;
437 } else if (rotate
== FB_ROTATE_UD
) {
438 for (x
= 0; x
< num
; x
++) {
439 info
->fbops
->fb_imageblit(info
, image
);
440 image
->dx
-= image
->width
+ 8;
442 } else if (rotate
== FB_ROTATE_CW
) {
444 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
446 info
->fbops
->fb_imageblit(info
, image
);
447 image
->dy
+= image
->height
+ 8;
449 } else if (rotate
== FB_ROTATE_CCW
) {
450 for (x
= 0; x
< num
; x
++) {
451 info
->fbops
->fb_imageblit(info
, image
);
452 image
->dy
-= image
->height
+ 8;
457 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
458 const struct linux_logo
*logo
, int y
,
461 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
462 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
463 struct fb_image image
;
465 /* Return if the frame buffer is not mapped or suspended */
466 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
471 image
.data
= logo
->data
;
473 if (fb_logo
.needs_cmapreset
)
474 fb_set_logocmap(info
, logo
);
476 if (fb_logo
.needs_truepalette
||
477 fb_logo
.needs_directpalette
) {
478 palette
= kmalloc(256 * 4, GFP_KERNEL
);
482 if (fb_logo
.needs_truepalette
)
483 fb_set_logo_truepalette(info
, logo
, palette
);
485 fb_set_logo_directpalette(info
, logo
, palette
);
487 saved_pseudo_palette
= info
->pseudo_palette
;
488 info
->pseudo_palette
= palette
;
491 if (fb_logo
.depth
<= 4) {
492 logo_new
= kmalloc_array(logo
->width
, logo
->height
,
494 if (logo_new
== NULL
) {
496 if (saved_pseudo_palette
)
497 info
->pseudo_palette
= saved_pseudo_palette
;
500 image
.data
= logo_new
;
501 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
506 image
.width
= logo
->width
;
507 image
.height
= logo
->height
;
510 logo_rotate
= kmalloc_array(logo
->width
, logo
->height
,
513 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
516 fb_do_show_logo(info
, &image
, rotate
, n
);
519 if (saved_pseudo_palette
!= NULL
)
520 info
->pseudo_palette
= saved_pseudo_palette
;
527 #ifdef CONFIG_FB_LOGO_EXTRA
529 #define FB_LOGO_EX_NUM_MAX 10
530 static struct logo_data_extra
{
531 const struct linux_logo
*logo
;
533 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
534 static unsigned int fb_logo_ex_num
;
536 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
538 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
541 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
542 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
546 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
551 /* FIXME: logo_ex supports only truecolor fb. */
552 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
555 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
556 if (fb_logo_ex
[i
].logo
->type
!= fb_logo
.logo
->type
) {
557 fb_logo_ex
[i
].logo
= NULL
;
560 height
+= fb_logo_ex
[i
].logo
->height
;
562 height
-= fb_logo_ex
[i
].logo
->height
;
570 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
574 for (i
= 0; i
< fb_logo_ex_num
; i
++)
575 y
+= fb_show_logo_line(info
, rotate
,
576 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
581 #else /* !CONFIG_FB_LOGO_EXTRA */
583 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
590 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
595 #endif /* CONFIG_FB_LOGO_EXTRA */
598 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
600 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
603 memset(&fb_logo
, 0, sizeof(struct logo_data
));
605 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
609 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
610 depth
= info
->var
.blue
.length
;
611 if (info
->var
.red
.length
< depth
)
612 depth
= info
->var
.red
.length
;
613 if (info
->var
.green
.length
< depth
)
614 depth
= info
->var
.green
.length
;
617 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
618 /* assume console colormap */
622 /* Return if no suitable logo was found */
623 fb_logo
.logo
= fb_find_logo(depth
);
629 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
630 yres
= info
->var
.yres
;
632 yres
= info
->var
.xres
;
634 if (fb_logo
.logo
->height
> yres
) {
639 /* What depth we asked for might be different from what we get */
640 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
642 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
648 if (fb_logo
.depth
> 4 && depth
> 4) {
649 switch (info
->fix
.visual
) {
650 case FB_VISUAL_TRUECOLOR
:
651 fb_logo
.needs_truepalette
= 1;
653 case FB_VISUAL_DIRECTCOLOR
:
654 fb_logo
.needs_directpalette
= 1;
655 fb_logo
.needs_cmapreset
= 1;
657 case FB_VISUAL_PSEUDOCOLOR
:
658 fb_logo
.needs_cmapreset
= 1;
663 return fb_prepare_extra_logos(info
, fb_logo
.logo
->height
, yres
);
666 int fb_show_logo(struct fb_info
*info
, int rotate
)
670 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
672 y
= fb_show_extra_logos(info
, y
, rotate
);
677 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
678 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
679 #endif /* CONFIG_LOGO */
680 EXPORT_SYMBOL(fb_prepare_logo
);
681 EXPORT_SYMBOL(fb_show_logo
);
683 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
685 mutex_lock(®istration_lock
);
686 return (*pos
< FB_MAX
) ? pos
: NULL
;
689 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
692 return (*pos
< FB_MAX
) ? pos
: NULL
;
695 static void fb_seq_stop(struct seq_file
*m
, void *v
)
697 mutex_unlock(®istration_lock
);
700 static int fb_seq_show(struct seq_file
*m
, void *v
)
702 int i
= *(loff_t
*)v
;
703 struct fb_info
*fi
= registered_fb
[i
];
706 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
710 static const struct seq_operations proc_fb_seq_ops
= {
711 .start
= fb_seq_start
,
718 * We hold a reference to the fb_info in file->private_data,
719 * but if the current registered fb has changed, we don't
720 * actually want to use it.
722 * So look up the fb_info using the inode minor number,
723 * and just verify it against the reference we have.
725 static struct fb_info
*file_fb_info(struct file
*file
)
727 struct inode
*inode
= file_inode(file
);
728 int fbidx
= iminor(inode
);
729 struct fb_info
*info
= registered_fb
[fbidx
];
731 if (info
!= file
->private_data
)
737 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
739 unsigned long p
= *ppos
;
740 struct fb_info
*info
= file_fb_info(file
);
743 int c
, cnt
= 0, err
= 0;
744 unsigned long total_size
;
746 if (!info
|| ! info
->screen_base
)
749 if (info
->state
!= FBINFO_STATE_RUNNING
)
752 if (info
->fbops
->fb_read
)
753 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
755 total_size
= info
->screen_size
;
758 total_size
= info
->fix
.smem_len
;
763 if (count
>= total_size
)
766 if (count
+ p
> total_size
)
767 count
= total_size
- p
;
769 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
774 src
= (u8 __iomem
*) (info
->screen_base
+ p
);
776 if (info
->fbops
->fb_sync
)
777 info
->fbops
->fb_sync(info
);
780 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
782 fb_memcpy_fromfb(dst
, src
, c
);
786 if (copy_to_user(buf
, buffer
, c
)) {
798 return (err
) ? err
: cnt
;
802 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
804 unsigned long p
= *ppos
;
805 struct fb_info
*info
= file_fb_info(file
);
808 int c
, cnt
= 0, err
= 0;
809 unsigned long total_size
;
811 if (!info
|| !info
->screen_base
)
814 if (info
->state
!= FBINFO_STATE_RUNNING
)
817 if (info
->fbops
->fb_write
)
818 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
820 total_size
= info
->screen_size
;
823 total_size
= info
->fix
.smem_len
;
828 if (count
> total_size
) {
833 if (count
+ p
> total_size
) {
837 count
= total_size
- p
;
840 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
845 dst
= (u8 __iomem
*) (info
->screen_base
+ p
);
847 if (info
->fbops
->fb_sync
)
848 info
->fbops
->fb_sync(info
);
851 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
854 if (copy_from_user(src
, buf
, c
)) {
859 fb_memcpy_tofb(dst
, src
, c
);
870 return (cnt
) ? cnt
: err
;
874 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
876 struct fb_fix_screeninfo
*fix
= &info
->fix
;
877 unsigned int yres
= info
->var
.yres
;
880 if (var
->yoffset
> 0) {
881 if (var
->vmode
& FB_VMODE_YWRAP
) {
882 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
886 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
890 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
891 (var
->xoffset
% fix
->xpanstep
)))
894 if (err
|| !info
->fbops
->fb_pan_display
||
895 var
->yoffset
> info
->var
.yres_virtual
- yres
||
896 var
->xoffset
> info
->var
.xres_virtual
- info
->var
.xres
)
899 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
901 info
->var
.xoffset
= var
->xoffset
;
902 info
->var
.yoffset
= var
->yoffset
;
903 if (var
->vmode
& FB_VMODE_YWRAP
)
904 info
->var
.vmode
|= FB_VMODE_YWRAP
;
906 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
909 EXPORT_SYMBOL(fb_pan_display
);
911 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
914 struct fb_event event
;
915 struct fb_blit_caps caps
, fbcaps
;
918 memset(&caps
, 0, sizeof(caps
));
919 memset(&fbcaps
, 0, sizeof(fbcaps
));
920 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
923 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
924 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
926 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
927 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
928 (fbcaps
.len
< caps
.len
))
935 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
937 int flags
= info
->flags
;
940 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
941 struct fb_videomode mode1
, mode2
;
943 fb_var_to_videomode(&mode1
, var
);
944 fb_var_to_videomode(&mode2
, &info
->var
);
945 /* make sure we don't delete the videomode of current var */
946 ret
= fb_mode_is_equal(&mode1
, &mode2
);
949 struct fb_event event
;
953 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
957 fb_delete_videomode(&mode1
, &info
->modelist
);
960 ret
= (ret
) ? -EINVAL
: 0;
964 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
965 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
966 u32 activate
= var
->activate
;
968 /* When using FOURCC mode, make sure the red, green, blue and
969 * transp fields are set to 0.
971 if ((info
->fix
.capabilities
& FB_CAP_FOURCC
) &&
972 var
->grayscale
> 1) {
973 if (var
->red
.offset
|| var
->green
.offset
||
974 var
->blue
.offset
|| var
->transp
.offset
||
975 var
->red
.length
|| var
->green
.length
||
976 var
->blue
.length
|| var
->transp
.length
||
977 var
->red
.msb_right
|| var
->green
.msb_right
||
978 var
->blue
.msb_right
|| var
->transp
.msb_right
)
982 if (!info
->fbops
->fb_check_var
) {
987 ret
= info
->fbops
->fb_check_var(var
, info
);
992 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
993 struct fb_var_screeninfo old_var
;
994 struct fb_videomode mode
;
996 if (info
->fbops
->fb_get_caps
) {
997 ret
= fb_check_caps(info
, var
, activate
);
1003 old_var
= info
->var
;
1006 if (info
->fbops
->fb_set_par
) {
1007 ret
= info
->fbops
->fb_set_par(info
);
1010 info
->var
= old_var
;
1011 printk(KERN_WARNING
"detected "
1012 "fb_set_par error, "
1013 "error code: %d\n", ret
);
1018 fb_pan_display(info
, &info
->var
);
1019 fb_set_cmap(&info
->cmap
, info
);
1020 fb_var_to_videomode(&mode
, &info
->var
);
1022 if (info
->modelist
.prev
&& info
->modelist
.next
&&
1023 !list_empty(&info
->modelist
))
1024 ret
= fb_add_videomode(&mode
, &info
->modelist
);
1026 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
1027 struct fb_event event
;
1028 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
1029 FB_EVENT_MODE_CHANGE_ALL
:
1030 FB_EVENT_MODE_CHANGE
;
1032 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1035 fb_notifier_call_chain(evnt
, &event
);
1043 EXPORT_SYMBOL(fb_set_var
);
1046 fb_blank(struct fb_info
*info
, int blank
)
1048 struct fb_event event
;
1049 int ret
= -EINVAL
, early_ret
;
1051 if (blank
> FB_BLANK_POWERDOWN
)
1052 blank
= FB_BLANK_POWERDOWN
;
1055 event
.data
= &blank
;
1057 early_ret
= fb_notifier_call_chain(FB_EARLY_EVENT_BLANK
, &event
);
1059 if (info
->fbops
->fb_blank
)
1060 ret
= info
->fbops
->fb_blank(blank
, info
);
1063 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1066 * if fb_blank is failed then revert effects of
1067 * the early blank event.
1070 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK
, &event
);
1075 EXPORT_SYMBOL(fb_blank
);
1077 static long do_fb_ioctl(struct fb_info
*info
, unsigned int cmd
,
1081 struct fb_var_screeninfo var
;
1082 struct fb_fix_screeninfo fix
;
1083 struct fb_con2fbmap con2fb
;
1084 struct fb_cmap cmap_from
;
1085 struct fb_cmap_user cmap
;
1086 struct fb_event event
;
1087 void __user
*argp
= (void __user
*)arg
;
1091 case FBIOGET_VSCREENINFO
:
1092 if (!lock_fb_info(info
))
1095 unlock_fb_info(info
);
1097 ret
= copy_to_user(argp
, &var
, sizeof(var
)) ? -EFAULT
: 0;
1099 case FBIOPUT_VSCREENINFO
:
1100 if (copy_from_user(&var
, argp
, sizeof(var
)))
1103 if (!lock_fb_info(info
)) {
1107 info
->flags
|= FBINFO_MISC_USEREVENT
;
1108 ret
= fb_set_var(info
, &var
);
1109 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1110 unlock_fb_info(info
);
1112 if (!ret
&& copy_to_user(argp
, &var
, sizeof(var
)))
1115 case FBIOGET_FSCREENINFO
:
1116 if (!lock_fb_info(info
))
1119 unlock_fb_info(info
);
1121 ret
= copy_to_user(argp
, &fix
, sizeof(fix
)) ? -EFAULT
: 0;
1124 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1126 ret
= fb_set_user_cmap(&cmap
, info
);
1129 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1131 if (!lock_fb_info(info
))
1133 cmap_from
= info
->cmap
;
1134 unlock_fb_info(info
);
1135 ret
= fb_cmap_to_user(&cmap_from
, &cmap
);
1137 case FBIOPAN_DISPLAY
:
1138 if (copy_from_user(&var
, argp
, sizeof(var
)))
1141 if (!lock_fb_info(info
)) {
1145 ret
= fb_pan_display(info
, &var
);
1146 unlock_fb_info(info
);
1148 if (ret
== 0 && copy_to_user(argp
, &var
, sizeof(var
)))
1154 case FBIOGET_CON2FBMAP
:
1155 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1157 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1159 con2fb
.framebuffer
= -1;
1160 event
.data
= &con2fb
;
1161 if (!lock_fb_info(info
))
1164 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
1165 unlock_fb_info(info
);
1166 ret
= copy_to_user(argp
, &con2fb
, sizeof(con2fb
)) ? -EFAULT
: 0;
1168 case FBIOPUT_CON2FBMAP
:
1169 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1171 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1173 if (con2fb
.framebuffer
>= FB_MAX
)
1175 if (!registered_fb
[con2fb
.framebuffer
])
1176 request_module("fb%d", con2fb
.framebuffer
);
1177 if (!registered_fb
[con2fb
.framebuffer
]) {
1181 event
.data
= &con2fb
;
1183 if (!lock_fb_info(info
)) {
1188 ret
= fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
, &event
);
1189 unlock_fb_info(info
);
1194 if (!lock_fb_info(info
)) {
1198 info
->flags
|= FBINFO_MISC_USEREVENT
;
1199 ret
= fb_blank(info
, arg
);
1200 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1201 unlock_fb_info(info
);
1205 if (!lock_fb_info(info
))
1209 ret
= fb
->fb_ioctl(info
, cmd
, arg
);
1212 unlock_fb_info(info
);
1217 static long fb_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1219 struct fb_info
*info
= file_fb_info(file
);
1223 return do_fb_ioctl(info
, cmd
, arg
);
1226 #ifdef CONFIG_COMPAT
1227 struct fb_fix_screeninfo32
{
1229 compat_caddr_t smem_start
;
1238 compat_caddr_t mmio_start
;
1248 compat_caddr_t green
;
1249 compat_caddr_t blue
;
1250 compat_caddr_t transp
;
1253 static int fb_getput_cmap(struct fb_info
*info
, unsigned int cmd
,
1256 struct fb_cmap_user __user
*cmap
;
1257 struct fb_cmap32 __user
*cmap32
;
1261 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1262 cmap32
= compat_ptr(arg
);
1264 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1267 if (get_user(data
, &cmap32
->red
) ||
1268 put_user(compat_ptr(data
), &cmap
->red
) ||
1269 get_user(data
, &cmap32
->green
) ||
1270 put_user(compat_ptr(data
), &cmap
->green
) ||
1271 get_user(data
, &cmap32
->blue
) ||
1272 put_user(compat_ptr(data
), &cmap
->blue
) ||
1273 get_user(data
, &cmap32
->transp
) ||
1274 put_user(compat_ptr(data
), &cmap
->transp
))
1277 err
= do_fb_ioctl(info
, cmd
, (unsigned long) cmap
);
1280 if (copy_in_user(&cmap32
->start
,
1288 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1289 struct fb_fix_screeninfo32 __user
*fix32
)
1294 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1296 data
= (__u32
) (unsigned long) fix
->smem_start
;
1297 err
|= put_user(data
, &fix32
->smem_start
);
1299 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1300 err
|= put_user(fix
->type
, &fix32
->type
);
1301 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1302 err
|= put_user(fix
->visual
, &fix32
->visual
);
1303 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1304 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1305 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1306 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1308 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1309 err
|= put_user(data
, &fix32
->mmio_start
);
1311 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1312 err
|= put_user(fix
->accel
, &fix32
->accel
);
1313 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1314 sizeof(fix
->reserved
));
1321 static int fb_get_fscreeninfo(struct fb_info
*info
, unsigned int cmd
,
1324 struct fb_fix_screeninfo fix
;
1326 if (!lock_fb_info(info
))
1329 unlock_fb_info(info
);
1330 return do_fscreeninfo_to_user(&fix
, compat_ptr(arg
));
1333 static long fb_compat_ioctl(struct file
*file
, unsigned int cmd
,
1336 struct fb_info
*info
= file_fb_info(file
);
1338 long ret
= -ENOIOCTLCMD
;
1344 case FBIOGET_VSCREENINFO
:
1345 case FBIOPUT_VSCREENINFO
:
1346 case FBIOPAN_DISPLAY
:
1347 case FBIOGET_CON2FBMAP
:
1348 case FBIOPUT_CON2FBMAP
:
1349 arg
= (unsigned long) compat_ptr(arg
);
1351 ret
= do_fb_ioctl(info
, cmd
, arg
);
1354 case FBIOGET_FSCREENINFO
:
1355 ret
= fb_get_fscreeninfo(info
, cmd
, arg
);
1360 ret
= fb_getput_cmap(info
, cmd
, arg
);
1364 if (fb
->fb_compat_ioctl
)
1365 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1373 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1375 struct fb_info
*info
= file_fb_info(file
);
1377 unsigned long mmio_pgoff
;
1378 unsigned long start
;
1386 mutex_lock(&info
->mm_lock
);
1391 * The framebuffer needs to be accessed decrypted, be sure
1392 * SME protection is removed ahead of the call
1394 vma
->vm_page_prot
= pgprot_decrypted(vma
->vm_page_prot
);
1395 res
= fb
->fb_mmap(info
, vma
);
1396 mutex_unlock(&info
->mm_lock
);
1401 * Ugh. This can be either the frame buffer mapping, or
1402 * if pgoff points past it, the mmio mapping.
1404 start
= info
->fix
.smem_start
;
1405 len
= info
->fix
.smem_len
;
1406 mmio_pgoff
= PAGE_ALIGN((start
& ~PAGE_MASK
) + len
) >> PAGE_SHIFT
;
1407 if (vma
->vm_pgoff
>= mmio_pgoff
) {
1408 if (info
->var
.accel_flags
) {
1409 mutex_unlock(&info
->mm_lock
);
1413 vma
->vm_pgoff
-= mmio_pgoff
;
1414 start
= info
->fix
.mmio_start
;
1415 len
= info
->fix
.mmio_len
;
1417 mutex_unlock(&info
->mm_lock
);
1419 vma
->vm_page_prot
= vm_get_page_prot(vma
->vm_flags
);
1421 * The framebuffer needs to be accessed decrypted, be sure
1422 * SME protection is removed
1424 vma
->vm_page_prot
= pgprot_decrypted(vma
->vm_page_prot
);
1425 fb_pgprotect(file
, vma
, start
);
1427 return vm_iomap_memory(vma
, start
, len
);
1431 fb_open(struct inode
*inode
, struct file
*file
)
1432 __acquires(&info
->lock
)
1433 __releases(&info
->lock
)
1435 int fbidx
= iminor(inode
);
1436 struct fb_info
*info
;
1439 info
= get_fb_info(fbidx
);
1441 request_module("fb%d", fbidx
);
1442 info
= get_fb_info(fbidx
);
1447 return PTR_ERR(info
);
1449 mutex_lock(&info
->lock
);
1450 if (!try_module_get(info
->fbops
->owner
)) {
1454 file
->private_data
= info
;
1455 if (info
->fbops
->fb_open
) {
1456 res
= info
->fbops
->fb_open(info
,1);
1458 module_put(info
->fbops
->owner
);
1460 #ifdef CONFIG_FB_DEFERRED_IO
1462 fb_deferred_io_open(info
, inode
, file
);
1465 mutex_unlock(&info
->lock
);
1472 fb_release(struct inode
*inode
, struct file
*file
)
1473 __acquires(&info
->lock
)
1474 __releases(&info
->lock
)
1476 struct fb_info
* const info
= file
->private_data
;
1478 mutex_lock(&info
->lock
);
1479 if (info
->fbops
->fb_release
)
1480 info
->fbops
->fb_release(info
,1);
1481 module_put(info
->fbops
->owner
);
1482 mutex_unlock(&info
->lock
);
1487 #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1488 unsigned long get_fb_unmapped_area(struct file
*filp
,
1489 unsigned long addr
, unsigned long len
,
1490 unsigned long pgoff
, unsigned long flags
)
1492 struct fb_info
* const info
= filp
->private_data
;
1493 unsigned long fb_size
= PAGE_ALIGN(info
->fix
.smem_len
);
1495 if (pgoff
> fb_size
|| len
> fb_size
- pgoff
)
1498 return (unsigned long)info
->screen_base
+ pgoff
;
1502 static const struct file_operations fb_fops
= {
1503 .owner
= THIS_MODULE
,
1506 .unlocked_ioctl
= fb_ioctl
,
1507 #ifdef CONFIG_COMPAT
1508 .compat_ioctl
= fb_compat_ioctl
,
1512 .release
= fb_release
,
1513 #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1514 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1515 !defined(CONFIG_MMU))
1516 .get_unmapped_area
= get_fb_unmapped_area
,
1518 #ifdef CONFIG_FB_DEFERRED_IO
1519 .fsync
= fb_deferred_io_fsync
,
1521 .llseek
= default_llseek
,
1524 struct class *fb_class
;
1525 EXPORT_SYMBOL(fb_class
);
1527 static int fb_check_foreignness(struct fb_info
*fi
)
1529 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1531 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1534 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1536 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1537 #endif /* __BIG_ENDIAN */
1539 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1540 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1541 "support this framebuffer\n", fi
->fix
.id
);
1543 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1544 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1545 "support this framebuffer\n", fi
->fix
.id
);
1552 static bool apertures_overlap(struct aperture
*gen
, struct aperture
*hw
)
1554 /* is the generic aperture base the same as the HW one */
1555 if (gen
->base
== hw
->base
)
1557 /* is the generic aperture base inside the hw base->hw base+size */
1558 if (gen
->base
> hw
->base
&& gen
->base
< hw
->base
+ hw
->size
)
1563 static bool fb_do_apertures_overlap(struct apertures_struct
*gena
,
1564 struct apertures_struct
*hwa
)
1570 for (i
= 0; i
< hwa
->count
; ++i
) {
1571 struct aperture
*h
= &hwa
->ranges
[i
];
1572 for (j
= 0; j
< gena
->count
; ++j
) {
1573 struct aperture
*g
= &gena
->ranges
[j
];
1574 printk(KERN_DEBUG
"checking generic (%llx %llx) vs hw (%llx %llx)\n",
1575 (unsigned long long)g
->base
,
1576 (unsigned long long)g
->size
,
1577 (unsigned long long)h
->base
,
1578 (unsigned long long)h
->size
);
1579 if (apertures_overlap(g
, h
))
1587 static int do_unregister_framebuffer(struct fb_info
*fb_info
);
1589 #define VGA_FB_PHYS 0xA0000
1590 static int do_remove_conflicting_framebuffers(struct apertures_struct
*a
,
1591 const char *name
, bool primary
)
1595 /* check all firmware fbs and kick off if the base addr overlaps */
1596 for (i
= 0 ; i
< FB_MAX
; i
++) {
1597 struct apertures_struct
*gen_aper
;
1598 if (!registered_fb
[i
])
1601 if (!(registered_fb
[i
]->flags
& FBINFO_MISC_FIRMWARE
))
1604 gen_aper
= registered_fb
[i
]->apertures
;
1605 if (fb_do_apertures_overlap(gen_aper
, a
) ||
1606 (primary
&& gen_aper
&& gen_aper
->count
&&
1607 gen_aper
->ranges
[0].base
== VGA_FB_PHYS
)) {
1609 printk(KERN_INFO
"fb: switching to %s from %s\n",
1610 name
, registered_fb
[i
]->fix
.id
);
1611 ret
= do_unregister_framebuffer(registered_fb
[i
]);
1620 static bool lockless_register_fb
;
1621 module_param_named_unsafe(lockless_register_fb
, lockless_register_fb
, bool, 0400);
1622 MODULE_PARM_DESC(lockless_register_fb
,
1623 "Lockless framebuffer registration for debugging [default=off]");
1625 static int do_register_framebuffer(struct fb_info
*fb_info
)
1628 struct fb_event event
;
1629 struct fb_videomode mode
;
1631 if (fb_check_foreignness(fb_info
))
1634 ret
= do_remove_conflicting_framebuffers(fb_info
->apertures
,
1636 fb_is_primary_device(fb_info
));
1640 if (num_registered_fb
== FB_MAX
)
1643 num_registered_fb
++;
1644 for (i
= 0 ; i
< FB_MAX
; i
++)
1645 if (!registered_fb
[i
])
1648 atomic_set(&fb_info
->count
, 1);
1649 mutex_init(&fb_info
->lock
);
1650 mutex_init(&fb_info
->mm_lock
);
1652 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1653 MKDEV(FB_MAJOR
, i
), NULL
, "fb%d", i
);
1654 if (IS_ERR(fb_info
->dev
)) {
1656 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1657 fb_info
->dev
= NULL
;
1659 fb_init_device(fb_info
);
1661 if (fb_info
->pixmap
.addr
== NULL
) {
1662 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1663 if (fb_info
->pixmap
.addr
) {
1664 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1665 fb_info
->pixmap
.buf_align
= 1;
1666 fb_info
->pixmap
.scan_align
= 1;
1667 fb_info
->pixmap
.access_align
= 32;
1668 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1671 fb_info
->pixmap
.offset
= 0;
1673 if (!fb_info
->pixmap
.blit_x
)
1674 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1676 if (!fb_info
->pixmap
.blit_y
)
1677 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1679 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1680 INIT_LIST_HEAD(&fb_info
->modelist
);
1682 if (fb_info
->skip_vt_switch
)
1683 pm_vt_switch_required(fb_info
->dev
, false);
1685 pm_vt_switch_required(fb_info
->dev
, true);
1687 fb_var_to_videomode(&mode
, &fb_info
->var
);
1688 fb_add_videomode(&mode
, &fb_info
->modelist
);
1689 registered_fb
[i
] = fb_info
;
1691 event
.info
= fb_info
;
1692 if (!lockless_register_fb
)
1694 if (!lock_fb_info(fb_info
)) {
1695 if (!lockless_register_fb
)
1700 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1701 unlock_fb_info(fb_info
);
1702 if (!lockless_register_fb
)
1707 static int do_unregister_framebuffer(struct fb_info
*fb_info
)
1709 struct fb_event event
;
1713 if (i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
)
1717 if (!lock_fb_info(fb_info
)) {
1722 event
.info
= fb_info
;
1723 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1724 unlock_fb_info(fb_info
);
1730 pm_vt_switch_unregister(fb_info
->dev
);
1732 unlink_framebuffer(fb_info
);
1733 if (fb_info
->pixmap
.addr
&&
1734 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1735 kfree(fb_info
->pixmap
.addr
);
1736 fb_destroy_modelist(&fb_info
->modelist
);
1737 registered_fb
[i
] = NULL
;
1738 num_registered_fb
--;
1739 fb_cleanup_device(fb_info
);
1740 event
.info
= fb_info
;
1742 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1745 /* this may free fb info */
1746 put_fb_info(fb_info
);
1750 int unlink_framebuffer(struct fb_info
*fb_info
)
1755 if (i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
)
1759 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1760 fb_info
->dev
= NULL
;
1764 EXPORT_SYMBOL(unlink_framebuffer
);
1766 int remove_conflicting_framebuffers(struct apertures_struct
*a
,
1767 const char *name
, bool primary
)
1771 mutex_lock(®istration_lock
);
1772 ret
= do_remove_conflicting_framebuffers(a
, name
, primary
);
1773 mutex_unlock(®istration_lock
);
1777 EXPORT_SYMBOL(remove_conflicting_framebuffers
);
1780 * register_framebuffer - registers a frame buffer device
1781 * @fb_info: frame buffer info structure
1783 * Registers a frame buffer device @fb_info.
1785 * Returns negative errno on error, or zero for success.
1789 register_framebuffer(struct fb_info
*fb_info
)
1793 mutex_lock(®istration_lock
);
1794 ret
= do_register_framebuffer(fb_info
);
1795 mutex_unlock(®istration_lock
);
1799 EXPORT_SYMBOL(register_framebuffer
);
1802 * unregister_framebuffer - releases a frame buffer device
1803 * @fb_info: frame buffer info structure
1805 * Unregisters a frame buffer device @fb_info.
1807 * Returns negative errno on error, or zero for success.
1809 * This function will also notify the framebuffer console
1810 * to release the driver.
1812 * This is meant to be called within a driver's module_exit()
1813 * function. If this is called outside module_exit(), ensure
1814 * that the driver implements fb_open() and fb_release() to
1815 * check that no processes are using the device.
1818 unregister_framebuffer(struct fb_info
*fb_info
)
1822 mutex_lock(®istration_lock
);
1823 ret
= do_unregister_framebuffer(fb_info
);
1824 mutex_unlock(®istration_lock
);
1828 EXPORT_SYMBOL(unregister_framebuffer
);
1831 * fb_set_suspend - low level driver signals suspend
1832 * @info: framebuffer affected
1833 * @state: 0 = resuming, !=0 = suspending
1835 * This is meant to be used by low level drivers to
1836 * signal suspend/resume to the core & clients.
1837 * It must be called with the console semaphore held
1839 void fb_set_suspend(struct fb_info
*info
, int state
)
1841 struct fb_event event
;
1845 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1846 info
->state
= FBINFO_STATE_SUSPENDED
;
1848 info
->state
= FBINFO_STATE_RUNNING
;
1849 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1852 EXPORT_SYMBOL(fb_set_suspend
);
1855 * fbmem_init - init frame buffer subsystem
1857 * Initialize the frame buffer subsystem.
1859 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1868 if (!proc_create_seq("fb", 0, NULL
, &proc_fb_seq_ops
))
1871 ret
= register_chrdev(FB_MAJOR
, "fb", &fb_fops
);
1873 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1877 fb_class
= class_create(THIS_MODULE
, "graphics");
1878 if (IS_ERR(fb_class
)) {
1879 ret
= PTR_ERR(fb_class
);
1880 pr_warn("Unable to create fb class; errno = %d\n", ret
);
1890 unregister_chrdev(FB_MAJOR
, "fb");
1892 remove_proc_entry("fb", NULL
);
1897 module_init(fbmem_init
);
1903 remove_proc_entry("fb", NULL
);
1904 class_destroy(fb_class
);
1905 unregister_chrdev(FB_MAJOR
, "fb");
1908 module_exit(fbmem_exit
);
1909 MODULE_LICENSE("GPL");
1910 MODULE_DESCRIPTION("Framebuffer base");
1912 subsys_initcall(fbmem_init
);
1915 int fb_new_modelist(struct fb_info
*info
)
1917 struct fb_event event
;
1918 struct fb_var_screeninfo var
= info
->var
;
1919 struct list_head
*pos
, *n
;
1920 struct fb_modelist
*modelist
;
1921 struct fb_videomode
*m
, mode
;
1924 list_for_each_safe(pos
, n
, &info
->modelist
) {
1925 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1926 m
= &modelist
->mode
;
1927 fb_videomode_to_var(&var
, m
);
1928 var
.activate
= FB_ACTIVATE_TEST
;
1929 err
= fb_set_var(info
, &var
);
1930 fb_var_to_videomode(&mode
, &var
);
1931 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1939 if (!list_empty(&info
->modelist
)) {
1941 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1947 MODULE_LICENSE("GPL");