Contributors: 37
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Antonino A. Daplas |
982 |
33.80% |
27 |
21.09% |
| James Simmons |
454 |
15.63% |
23 |
17.97% |
| Linus Torvalds (pre-git) |
239 |
8.23% |
11 |
8.59% |
| Linus Torvalds |
179 |
6.16% |
6 |
4.69% |
| Anton Vorontsov |
114 |
3.92% |
1 |
0.78% |
| Daniel Vetter |
113 |
3.89% |
12 |
9.38% |
| Benjamin Herrenschmidt |
105 |
3.61% |
4 |
3.12% |
| Laurent Pinchart |
98 |
3.37% |
1 |
0.78% |
| Thomas Zimmermann |
88 |
3.03% |
8 |
6.25% |
| Andrew Morton |
56 |
1.93% |
4 |
3.12% |
| Helge Deller |
54 |
1.86% |
2 |
1.56% |
| Florian Tobias Schandinat |
42 |
1.45% |
2 |
1.56% |
| Jon Smirl |
41 |
1.41% |
2 |
1.56% |
| Tetsuo Handa |
38 |
1.31% |
1 |
0.78% |
| Samuel Thibault |
36 |
1.24% |
1 |
0.78% |
| Jesse Barnes |
33 |
1.14% |
2 |
1.56% |
| Mikulas Patocka |
31 |
1.07% |
1 |
0.78% |
| Luca Tettamanti |
26 |
0.90% |
1 |
0.78% |
| Alexey Khoroshilov |
26 |
0.90% |
1 |
0.78% |
| Marcin Ślusarz |
26 |
0.90% |
1 |
0.78% |
| Bruno Prémont |
22 |
0.76% |
1 |
0.78% |
| Inki Dae |
19 |
0.65% |
1 |
0.78% |
| George Kennedy |
19 |
0.65% |
1 |
0.78% |
| Zheyu Ma |
10 |
0.34% |
1 |
0.78% |
| Yisheng Xie |
8 |
0.28% |
1 |
0.78% |
| Paul Mundt |
7 |
0.24% |
1 |
0.78% |
| Eric Miao |
7 |
0.24% |
1 |
0.78% |
| Kay Sievers |
7 |
0.24% |
1 |
0.78% |
| Ville Syrjälä |
6 |
0.21% |
1 |
0.78% |
| Dave Airlie |
5 |
0.17% |
1 |
0.78% |
| Zhen Lei |
4 |
0.14% |
1 |
0.78% |
| Xiyu Yang |
3 |
0.10% |
1 |
0.78% |
| Greg Kroah-Hartman |
3 |
0.10% |
1 |
0.78% |
| Geert Uytterhoeven |
1 |
0.03% |
1 |
0.78% |
| Gerd Knorr |
1 |
0.03% |
1 |
0.78% |
| Alexey Dobriyan |
1 |
0.03% |
1 |
0.78% |
| Jani Nikula |
1 |
0.03% |
1 |
0.78% |
| Total |
2905 |
|
128 |
|
/*
* linux/drivers/video/fbmem.c
*
* Copyright (C) 1994 Martin Schaller
*
* 2001 - Documented with DocBook
* - Brad Douglas <brad@neruo.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/console.h>
#include <linux/export.h>
#include <linux/fb.h>
#include <linux/fbcon.h>
#include <video/nomodeset.h>
#include "fb_internal.h"
/*
* Frame buffer device initialization and setup routines
*/
#define FBPIXMAPSIZE (1024 * 8)
struct class *fb_class;
DEFINE_MUTEX(registration_lock);
struct fb_info *registered_fb[FB_MAX] __read_mostly;
int num_registered_fb __read_mostly;
#define for_each_registered_fb(i) \
for (i = 0; i < FB_MAX; i++) \
if (!registered_fb[i]) {} else
struct fb_info *get_fb_info(unsigned int idx)
{
struct fb_info *fb_info;
if (idx >= FB_MAX)
return ERR_PTR(-ENODEV);
mutex_lock(®istration_lock);
fb_info = registered_fb[idx];
if (fb_info)
refcount_inc(&fb_info->count);
mutex_unlock(®istration_lock);
return fb_info;
}
void put_fb_info(struct fb_info *fb_info)
{
if (!refcount_dec_and_test(&fb_info->count))
return;
if (fb_info->fbops->fb_destroy)
fb_info->fbops->fb_destroy(fb_info);
}
/*
* Helpers
*/
int fb_get_color_depth(struct fb_var_screeninfo *var,
struct fb_fix_screeninfo *fix)
{
int depth = 0;
if (fix->visual == FB_VISUAL_MONO01 ||
fix->visual == FB_VISUAL_MONO10)
depth = 1;
else {
if (var->green.length == var->blue.length &&
var->green.length == var->red.length &&
var->green.offset == var->blue.offset &&
var->green.offset == var->red.offset)
depth = var->green.length;
else
depth = var->green.length + var->red.length +
var->blue.length;
}
return depth;
}
EXPORT_SYMBOL(fb_get_color_depth);
/*
* Data padding functions.
*/
void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
{
__fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
}
EXPORT_SYMBOL(fb_pad_aligned_buffer);
void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
u32 shift_high, u32 shift_low, u32 mod)
{
u8 mask = (u8) (0xfff << shift_high), tmp;
int i, j;
for (i = height; i--; ) {
for (j = 0; j < idx; j++) {
tmp = dst[j];
tmp &= mask;
tmp |= *src >> shift_low;
dst[j] = tmp;
tmp = *src << shift_high;
dst[j+1] = tmp;
src++;
}
tmp = dst[idx];
tmp &= mask;
tmp |= *src >> shift_low;
dst[idx] = tmp;
if (shift_high < mod) {
tmp = *src << shift_high;
dst[idx+1] = tmp;
}
src++;
dst += d_pitch;
}
}
EXPORT_SYMBOL(fb_pad_unaligned_buffer);
/*
* we need to lock this section since fb_cursor
* may use fb_imageblit()
*/
char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
{
u32 align = buf->buf_align - 1, offset;
char *addr = buf->addr;
/* If IO mapped, we need to sync before access, no sharing of
* the pixmap is done
*/
if (buf->flags & FB_PIXMAP_IO) {
if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
info->fbops->fb_sync(info);
return addr;
}
/* See if we fit in the remaining pixmap space */
offset = buf->offset + align;
offset &= ~align;
if (offset + size > buf->size) {
/* We do not fit. In order to be able to re-use the buffer,
* we must ensure no asynchronous DMA'ing or whatever operation
* is in progress, we sync for that.
*/
if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
info->fbops->fb_sync(info);
offset = 0;
}
buf->offset = offset + size;
addr += offset;
return addr;
}
EXPORT_SYMBOL(fb_get_buffer_offset);
int
fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
{
struct fb_fix_screeninfo *fix = &info->fix;
unsigned int yres = info->var.yres;
int err = 0;
if (var->yoffset > 0) {
if (var->vmode & FB_VMODE_YWRAP) {
if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
err = -EINVAL;
else
yres = 0;
} else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
err = -EINVAL;
}
if (var->xoffset > 0 && (!fix->xpanstep ||
(var->xoffset % fix->xpanstep)))
err = -EINVAL;
if (err || !info->fbops->fb_pan_display ||
var->yoffset > info->var.yres_virtual - yres ||
var->xoffset > info->var.xres_virtual - info->var.xres)
return -EINVAL;
if ((err = info->fbops->fb_pan_display(var, info)))
return err;
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
info->var.vmode |= FB_VMODE_YWRAP;
else
info->var.vmode &= ~FB_VMODE_YWRAP;
return 0;
}
EXPORT_SYMBOL(fb_pan_display);
static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
u32 activate)
{
struct fb_blit_caps caps, fbcaps;
int err = 0;
memset(&caps, 0, sizeof(caps));
memset(&fbcaps, 0, sizeof(fbcaps));
caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
fbcon_get_requirement(info, &caps);
info->fbops->fb_get_caps(info, &fbcaps, var);
if (!bitmap_subset(caps.x, fbcaps.x, FB_MAX_BLIT_WIDTH) ||
!bitmap_subset(caps.y, fbcaps.y, FB_MAX_BLIT_HEIGHT) ||
(fbcaps.len < caps.len))
err = -EINVAL;
return err;
}
int
fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
{
int ret = 0;
u32 activate;
struct fb_var_screeninfo old_var;
struct fb_videomode mode;
struct fb_event event;
u32 unused;
if (var->activate & FB_ACTIVATE_INV_MODE) {
struct fb_videomode mode1, mode2;
fb_var_to_videomode(&mode1, var);
fb_var_to_videomode(&mode2, &info->var);
/* make sure we don't delete the videomode of current var */
ret = fb_mode_is_equal(&mode1, &mode2);
if (!ret) {
ret = fbcon_mode_deleted(info, &mode1);
if (!ret)
fb_delete_videomode(&mode1, &info->modelist);
}
return ret ? -EINVAL : 0;
}
if (!(var->activate & FB_ACTIVATE_FORCE) &&
!memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
return 0;
activate = var->activate;
/* When using FOURCC mode, make sure the red, green, blue and
* transp fields are set to 0.
*/
if ((info->fix.capabilities & FB_CAP_FOURCC) &&
var->grayscale > 1) {
if (var->red.offset || var->green.offset ||
var->blue.offset || var->transp.offset ||
var->red.length || var->green.length ||
var->blue.length || var->transp.length ||
var->red.msb_right || var->green.msb_right ||
var->blue.msb_right || var->transp.msb_right)
return -EINVAL;
}
if (!info->fbops->fb_check_var) {
*var = info->var;
return 0;
}
/* bitfill_aligned() assumes that it's at least 8x8 */
if (var->xres < 8 || var->yres < 8)
return -EINVAL;
/* Too huge resolution causes multiplication overflow. */
if (check_mul_overflow(var->xres, var->yres, &unused) ||
check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused))
return -EINVAL;
ret = info->fbops->fb_check_var(var, info);
if (ret)
return ret;
/* verify that virtual resolution >= physical resolution */
if (var->xres_virtual < var->xres ||
var->yres_virtual < var->yres) {
pr_warn("WARNING: fbcon: Driver '%s' missed to adjust virtual screen size (%ux%u vs. %ux%u)\n",
info->fix.id,
var->xres_virtual, var->yres_virtual,
var->xres, var->yres);
return -EINVAL;
}
if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
return 0;
if (info->fbops->fb_get_caps) {
ret = fb_check_caps(info, var, activate);
if (ret)
return ret;
}
old_var = info->var;
info->var = *var;
if (info->fbops->fb_set_par) {
ret = info->fbops->fb_set_par(info);
if (ret) {
info->var = old_var;
printk(KERN_WARNING "detected "
"fb_set_par error, "
"error code: %d\n", ret);
return ret;
}
}
fb_pan_display(info, &info->var);
fb_set_cmap(&info->cmap, info);
fb_var_to_videomode(&mode, &info->var);
if (info->modelist.prev && info->modelist.next &&
!list_empty(&info->modelist))
ret = fb_add_videomode(&mode, &info->modelist);
if (ret)
return ret;
event.info = info;
event.data = &mode;
fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
return 0;
}
EXPORT_SYMBOL(fb_set_var);
int
fb_blank(struct fb_info *info, int blank)
{
struct fb_event event;
int ret = -EINVAL;
if (blank > FB_BLANK_POWERDOWN)
blank = FB_BLANK_POWERDOWN;
event.info = info;
event.data = ␣
if (info->fbops->fb_blank)
ret = info->fbops->fb_blank(blank, info);
if (!ret)
fb_notifier_call_chain(FB_EVENT_BLANK, &event);
return ret;
}
EXPORT_SYMBOL(fb_blank);
static int fb_check_foreignness(struct fb_info *fi)
{
const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
#ifdef __BIG_ENDIAN
fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
#else
fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
#endif /* __BIG_ENDIAN */
if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
"support this framebuffer\n", fi->fix.id);
return -ENOSYS;
} else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
"support this framebuffer\n", fi->fix.id);
return -ENOSYS;
}
return 0;
}
static int do_register_framebuffer(struct fb_info *fb_info)
{
int i;
struct fb_videomode mode;
if (fb_check_foreignness(fb_info))
return -ENOSYS;
if (num_registered_fb == FB_MAX)
return -ENXIO;
num_registered_fb++;
for (i = 0 ; i < FB_MAX; i++)
if (!registered_fb[i])
break;
fb_info->node = i;
refcount_set(&fb_info->count, 1);
mutex_init(&fb_info->lock);
mutex_init(&fb_info->mm_lock);
fb_device_create(fb_info);
if (fb_info->pixmap.addr == NULL) {
fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
if (fb_info->pixmap.addr) {
fb_info->pixmap.size = FBPIXMAPSIZE;
fb_info->pixmap.buf_align = 1;
fb_info->pixmap.scan_align = 1;
fb_info->pixmap.access_align = 32;
fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
}
}
fb_info->pixmap.offset = 0;
if (bitmap_empty(fb_info->pixmap.blit_x, FB_MAX_BLIT_WIDTH))
bitmap_fill(fb_info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
if (bitmap_empty(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT))
bitmap_fill(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
if (!fb_info->modelist.prev || !fb_info->modelist.next)
INIT_LIST_HEAD(&fb_info->modelist);
if (fb_info->skip_vt_switch)
pm_vt_switch_required(fb_info->device, false);
else
pm_vt_switch_required(fb_info->device, true);
fb_var_to_videomode(&mode, &fb_info->var);
fb_add_videomode(&mode, &fb_info->modelist);
registered_fb[i] = fb_info;
#ifdef CONFIG_GUMSTIX_AM200EPD
{
struct fb_event event;
event.info = fb_info;
fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
}
#endif
return fbcon_fb_registered(fb_info);
}
static void unbind_console(struct fb_info *fb_info)
{
int i = fb_info->node;
if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
return;
fbcon_fb_unbind(fb_info);
}
static void unlink_framebuffer(struct fb_info *fb_info)
{
int i;
i = fb_info->node;
if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
return;
fb_device_destroy(fb_info);
pm_vt_switch_unregister(fb_info->device);
unbind_console(fb_info);
}
static void do_unregister_framebuffer(struct fb_info *fb_info)
{
unlink_framebuffer(fb_info);
if (fb_info->pixmap.addr &&
(fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) {
kfree(fb_info->pixmap.addr);
fb_info->pixmap.addr = NULL;
}
fb_destroy_modelist(&fb_info->modelist);
registered_fb[fb_info->node] = NULL;
num_registered_fb--;
#ifdef CONFIG_GUMSTIX_AM200EPD
{
struct fb_event event;
event.info = fb_info;
fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
}
#endif
fbcon_fb_unregistered(fb_info);
/* this may free fb info */
put_fb_info(fb_info);
}
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure
*
* Registers a frame buffer device @fb_info.
*
* Returns negative errno on error, or zero for success.
*
*/
int
register_framebuffer(struct fb_info *fb_info)
{
int ret;
mutex_lock(®istration_lock);
ret = do_register_framebuffer(fb_info);
mutex_unlock(®istration_lock);
return ret;
}
EXPORT_SYMBOL(register_framebuffer);
/**
* unregister_framebuffer - releases a frame buffer device
* @fb_info: frame buffer info structure
*
* Unregisters a frame buffer device @fb_info.
*
* Returns negative errno on error, or zero for success.
*
* This function will also notify the framebuffer console
* to release the driver.
*
* This is meant to be called within a driver's module_exit()
* function. If this is called outside module_exit(), ensure
* that the driver implements fb_open() and fb_release() to
* check that no processes are using the device.
*/
void
unregister_framebuffer(struct fb_info *fb_info)
{
mutex_lock(®istration_lock);
do_unregister_framebuffer(fb_info);
mutex_unlock(®istration_lock);
}
EXPORT_SYMBOL(unregister_framebuffer);
/**
* fb_set_suspend - low level driver signals suspend
* @info: framebuffer affected
* @state: 0 = resuming, !=0 = suspending
*
* This is meant to be used by low level drivers to
* signal suspend/resume to the core & clients.
* It must be called with the console semaphore held
*/
void fb_set_suspend(struct fb_info *info, int state)
{
WARN_CONSOLE_UNLOCKED();
if (state) {
fbcon_suspended(info);
info->state = FBINFO_STATE_SUSPENDED;
} else {
info->state = FBINFO_STATE_RUNNING;
fbcon_resumed(info);
}
}
EXPORT_SYMBOL(fb_set_suspend);
static int __init fbmem_init(void)
{
int ret;
fb_class = class_create("graphics");
if (IS_ERR(fb_class)) {
ret = PTR_ERR(fb_class);
pr_err("Unable to create fb class; errno = %d\n", ret);
goto err_fb_class;
}
ret = fb_init_procfs();
if (ret)
goto err_class_destroy;
ret = fb_register_chrdev();
if (ret)
goto err_fb_cleanup_procfs;
fb_console_init();
return 0;
err_fb_cleanup_procfs:
fb_cleanup_procfs();
err_class_destroy:
class_destroy(fb_class);
err_fb_class:
fb_class = NULL;
return ret;
}
#ifdef MODULE
static void __exit fbmem_exit(void)
{
fb_console_exit();
fb_unregister_chrdev();
fb_cleanup_procfs();
class_destroy(fb_class);
}
module_init(fbmem_init);
module_exit(fbmem_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Framebuffer base");
#else
subsys_initcall(fbmem_init);
#endif
int fb_new_modelist(struct fb_info *info)
{
struct fb_var_screeninfo var = info->var;
struct list_head *pos, *n;
struct fb_modelist *modelist;
struct fb_videomode *m, mode;
int err;
list_for_each_safe(pos, n, &info->modelist) {
modelist = list_entry(pos, struct fb_modelist, list);
m = &modelist->mode;
fb_videomode_to_var(&var, m);
var.activate = FB_ACTIVATE_TEST;
err = fb_set_var(info, &var);
fb_var_to_videomode(&mode, &var);
if (err || !fb_mode_is_equal(m, &mode)) {
list_del(pos);
kfree(pos);
}
}
if (list_empty(&info->modelist))
return 1;
fbcon_new_modelist(info);
return 0;
}
bool fb_modesetting_disabled(const char *drvname)
{
bool fwonly = video_firmware_drivers_only();
if (fwonly)
pr_warn("Driver %s not loading because of nomodeset parameter\n",
drvname);
return fwonly;
}
EXPORT_SYMBOL(fb_modesetting_disabled);
MODULE_LICENSE("GPL");