[PATCH] fbcon: Console Rotation - Add ability to control rotation via sysfs
Add ability to set rotation via sysfs. The attributes are located in
/sys/class/graphics/fb[n] and accepts 0 - unrotated; 1 - clockwise; 2 - upside
down; 3 - counterclockwise.
The attributes are:
con_rotate (r/w) - set rotation of the active console
con_rotate_all (w) - set rotation of all consoles
rotate (r/w) - set rotation of the framebuffer, if supported.
Currently, none of the drivers support this.
This is probably temporary, since con_rotate and con_rotate_all are
console-specific and has no business being under the fb device. However,
until the console layer acquires it's own sysfs class, these attributes will
temporarily reside here.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index e829ba1..e7802ff 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -193,6 +193,8 @@
int unit);
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
int line, int count, int dy);
+static void fbcon_modechanged(struct fb_info *info);
+static void fbcon_set_all_vcs(struct fb_info *info);
#ifdef CONFIG_MAC
/*
@@ -218,6 +220,51 @@
else
ops->rotate = 0;
}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+ struct fbcon_ops *ops= info->fbcon_par;
+ struct fb_info *fb_info;
+
+ if (!ops || ops->currcon == -1)
+ return;
+
+ fb_info = registered_fb[con2fb_map[ops->currcon]];
+
+ if (info == fb_info) {
+ struct display *p = &fb_display[ops->currcon];
+
+ if (rotate < 4)
+ p->con_rotate = rotate;
+ else
+ p->con_rotate = 0;
+
+ fbcon_modechanged(info);
+ }
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+ struct vc_data *vc;
+ struct display *p;
+ int i;
+
+ if (!ops || ops->currcon < 0 || rotate > 3)
+ return;
+
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ vc = vc_cons[i].d;
+ if (!vc || vc->vc_mode != KD_TEXT ||
+ registered_fb[con2fb_map[i]] != info)
+ continue;
+
+ p = &fb_display[vc->vc_num];
+ p->con_rotate = rotate;
+ }
+
+ fbcon_set_all_vcs(info);
+}
#else
static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
{
@@ -225,8 +272,25 @@
ops->rotate = FB_ROTATE_UR;
}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+ return;
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+ return;
+}
#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
+static int fbcon_get_rotate(struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ return (ops) ? ops->rotate : 0;
+}
+
static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
@@ -2864,6 +2928,14 @@
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;
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 7a2a8fa..81b6cd2 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1319,6 +1319,28 @@
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 notifier_call_chain(&fb_notifier_list, event, &evnt);
+}
+EXPORT_SYMBOL(fb_con_duit);
+
static char *video_options[FB_MAX];
static int ofonly;
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index 007c8e9..08dac95 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -213,6 +213,70 @@
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
}
+static ssize_t store_rotate(struct class_device *class_device, const char *buf,
+ size_t count)
+{
+ struct fb_info *fb_info = class_get_devdata(class_device);
+ struct fb_var_screeninfo var;
+ char **last = NULL;
+ int err;
+
+ var = fb_info->var;
+ var.rotate = simple_strtoul(buf, last, 0);
+
+ if ((err = activate(fb_info, &var)))
+ return err;
+
+ return count;
+}
+
+
+static ssize_t show_rotate(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info = class_get_devdata(class_device);
+
+ 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)
{
@@ -440,6 +504,9 @@
__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
__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),
};
int fb_init_class_device(struct fb_info *fb_info)
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 357dd3a..04a58f3 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -508,6 +508,12 @@
/* 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;
@@ -836,6 +842,7 @@
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;