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[PATCH] Detaching fbcon: sdd sysfs class device entry for fbcon

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In order for this feature to work, an interface will be needed.  The most
appropriate is sysfs.  However, the framebuffer console has no sysfs entry
yet.  This will create a sysfs class device entry for fbcon under
/sys/class/graphics.

Add a class_device entry 'fbcon' under class 'graphics'.  Console-specific
attributes which where previously under class/graphics/fb[x] are moved to
class/graphics/fbcon.  These attributes, 'con_rotate' and 'con_rotate_all',
are also renamed to 'rotate' and 'rotate_all' respectively.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Antonino A. Daplas 2006-06-26 00:27:05 -07:00 committed by Linus Torvalds
parent a06630f3e7
commit 9a17917671
6 changed files with 112 additions and 83 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/video/Makefile
View File

@ -4,15 +4,15 @@
# Each configuration option enables a list of files.
obj-$(CONFIG_VT) += console/
obj-$(CONFIG_LOGO) += logo/
obj-$(CONFIG_SYSFS) += backlight/
obj-$(CONFIG_FB) += fb.o
fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \
modedb.o fbcvt.o
fb-objs := $(fb-y)
obj-$(CONFIG_VT) += console/
obj-$(CONFIG_LOGO) += logo/
obj-$(CONFIG_SYSFS) += backlight/
obj-$(CONFIG_FB_CFB_FILLRECT) += cfbfillrect.o
obj-$(CONFIG_FB_CFB_COPYAREA) += cfbcopyarea.o
obj-$(CONFIG_FB_CFB_IMAGEBLIT) += cfbimgblt.o

113
drivers/video/console/fbcon.c
View File

@ -195,6 +195,8 @@ static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
static void fbcon_modechanged(struct fb_info *info);
static void fbcon_set_all_vcs(struct fb_info *info);
static struct class_device *fbcon_class_device;
#ifdef CONFIG_MAC
/*
* On the Macintoy, there may or may not be a working VBL int. We need to probe
@ -2945,14 +2947,6 @@ static int fbcon_event_notify(struct notifier_block *self,
case FB_EVENT_NEW_MODELIST:
fbcon_new_modelist(info);
break;
case FB_EVENT_SET_CON_ROTATE:
fbcon_rotate(info, *(int *)event->data);
break;
case FB_EVENT_GET_CON_ROTATE:
ret = fbcon_get_rotate(info);
break;
case FB_EVENT_SET_CON_ROTATE_ALL:
fbcon_rotate_all(info, *(int *)event->data);
}
return ret;
@ -2992,6 +2986,81 @@ static struct notifier_block fbcon_event_notifier = {
.notifier_call = fbcon_event_notify,
};
static ssize_t store_rotate(struct class_device *class_device,
const char *buf, size_t count)
{
struct fb_info *info;
int rotate, idx;
char **last = NULL;
acquire_console_sem();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate(info, rotate);
err:
release_console_sem();
return count;
}
static ssize_t store_rotate_all(struct class_device *class_device,
const char *buf, size_t count)
{
struct fb_info *info;
int rotate, idx;
char **last = NULL;
acquire_console_sem();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate_all(info, rotate);
err:
release_console_sem();
return count;
}
static ssize_t show_rotate(struct class_device *class_device, char *buf)
{
struct fb_info *info;
int rotate = 0, idx;
acquire_console_sem();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = fbcon_get_rotate(info);
err:
release_console_sem();
return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
}
static struct class_device_attribute class_device_attrs[] = {
__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
__ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
};
static int fbcon_init_class_device(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
class_device_create_file(fbcon_class_device,
&class_device_attrs[i]);
return 0;
}
static int __init fb_console_init(void)
{
int i;
@ -3000,6 +3069,18 @@ static int __init fb_console_init(void)
fb_register_client(&fbcon_event_notifier);
release_console_sem();
fbcon_class_device =
class_device_create(fb_class, NULL,
MKDEV(FB_MAJOR, FB_MAX), NULL,
"fbcon");
if (IS_ERR(fbcon_class_device)) {
printk(KERN_WARNING "Unable to create class_device "
"for fbcon; errno = %ld\n",
PTR_ERR(fbcon_class_device));
fbcon_class_device = NULL;
} else
fbcon_init_class_device();
for (i = 0; i < MAX_NR_CONSOLES; i++)
con2fb_map[i] = -1;
@ -3020,10 +3101,26 @@ module_init(fb_console_init);
#ifdef MODULE
static void __exit fbcon_deinit_class_device(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
class_device_remove_file(fbcon_class_device,
&class_device_attrs[i]);
}
static void __exit fbcon_exit(void)
{
fbcon_deinit_class_device();
class_device_destroy(fb_class, MKDEV(FB_MAJOR, FB_MAX));
}
static void __exit fb_console_exit(void)
{
acquire_console_sem();
fb_unregister_client(&fbcon_event_notifier);
fbcon_exit();
release_console_sem();
give_up_console(&fb_con);
}

1
drivers/video/console/fbcon.h
View File

@ -175,6 +175,7 @@ extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
#endif
extern void fbcon_set_bitops(struct fbcon_ops *ops);
extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
extern struct class *fb_class;
#define FBCON_ATTRIBUTE_UNDERLINE 1
#define FBCON_ATTRIBUTE_REVERSE 2

25
drivers/video/fbmem.c
View File

@ -1276,8 +1276,8 @@ static struct file_operations fb_fops = {
#endif
};
static struct class *fb_class;
struct class *fb_class;
EXPORT_SYMBOL(fb_class);
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure
@ -1489,27 +1489,6 @@ int fb_new_modelist(struct fb_info *info)
return err;
}
/**
* fb_con_duit - user<->fbcon passthrough
* @info: struct fb_info
* @event: notification event to be passed to fbcon
* @data: private data
*
* DESCRIPTION
* This function is an fbcon-user event passing channel
* which bypasses fbdev. This is hopefully temporary
* until a user interface for fbcon is created
*/
int fb_con_duit(struct fb_info *info, int event, void *data)
{
struct fb_event evnt;
evnt.info = info;
evnt.data = data;
return blocking_notifier_call_chain(&fb_notifier_list, event, &evnt);
}
static char *video_options[FB_MAX];
static int ofonly;

41
drivers/video/fbsysfs.c
View File

@ -247,45 +247,6 @@ static ssize_t show_rotate(struct class_device *class_device, char *buf)
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
}
static ssize_t store_con_rotate(struct class_device *class_device,
const char *buf, size_t count)
{
struct fb_info *fb_info = class_get_devdata(class_device);
int rotate;
char **last = NULL;
acquire_console_sem();
rotate = simple_strtoul(buf, last, 0);
fb_con_duit(fb_info, FB_EVENT_SET_CON_ROTATE, &rotate);
release_console_sem();
return count;
}
static ssize_t store_con_rotate_all(struct class_device *class_device,
const char *buf, size_t count)
{
struct fb_info *fb_info = class_get_devdata(class_device);
int rotate;
char **last = NULL;
acquire_console_sem();
rotate = simple_strtoul(buf, last, 0);
fb_con_duit(fb_info, FB_EVENT_SET_CON_ROTATE_ALL, &rotate);
release_console_sem();
return count;
}
static ssize_t show_con_rotate(struct class_device *class_device, char *buf)
{
struct fb_info *fb_info = class_get_devdata(class_device);
int rotate;
acquire_console_sem();
rotate = fb_con_duit(fb_info, FB_EVENT_GET_CON_ROTATE, NULL);
release_console_sem();
return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
}
static ssize_t store_virtual(struct class_device *class_device,
const char * buf, size_t count)
{
@ -502,8 +463,6 @@ static struct class_device_attribute class_device_attrs[] = {
__ATTR(name, S_IRUGO, show_name, NULL),
__ATTR(stride, S_IRUGO, show_stride, NULL),
__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
__ATTR(con_rotate, S_IRUGO|S_IWUSR, show_con_rotate, store_con_rotate),
__ATTR(con_rotate_all, S_IWUSR, NULL, store_con_rotate_all),
__ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
#ifdef CONFIG_FB_BACKLIGHT
__ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),

7
include/linux/fb.h
View File

@ -515,12 +515,6 @@ struct fb_cursor_user {
/* The resolution of the passed in fb_info about to change and
all vc's should be changed */
#define FB_EVENT_MODE_CHANGE_ALL 0x0A
/* CONSOLE-SPECIFIC: set console rotation */
#define FB_EVENT_SET_CON_ROTATE 0x0B
/* CONSOLE-SPECIFIC: get console rotation */
#define FB_EVENT_GET_CON_ROTATE 0x0C
/* CONSOLE-SPECIFIC: rotate all consoles */
#define FB_EVENT_SET_CON_ROTATE_ALL 0x0D
struct fb_event {
struct fb_info *info;
@ -892,7 +886,6 @@ extern int fb_get_color_depth(struct fb_var_screeninfo *var,
struct fb_fix_screeninfo *fix);
extern int fb_get_options(char *name, char **option);
extern int fb_new_modelist(struct fb_info *info);
extern int fb_con_duit(struct fb_info *info, int event, void *data);
extern struct fb_info *registered_fb[FB_MAX];
extern int num_registered_fb;