sysmo-bts
/
barebox
9
0
Fork 0
Code Releases Activity

Add the feature to change the video mode at runtime 

This patch add the possibility to change the video mode at barebox's runtime
if the graphics driver in use supports it.

Signed-off-by: <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Juergen Beisert 2010-12-20 16:05:05 +01:00 committed by Sascha Hauer
parent fed63e249d
commit 30aa4efb57
2 changed files with 38 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/video/fb.c
View File

@ -56,6 +56,35 @@ static int fb_enable_set(struct device_d *dev, struct param_d *param,
return 0;
}
static int fb_setup_mode(struct device_d *dev, struct param_d *param,
const char *val)
{
struct fb_info *info = dev->priv;
int mode, ret;
if (info->enabled != 0)
return -EPERM;
if (!val)
return dev_param_set_generic(dev, param, NULL);
for (mode = 0; mode < info->num_modes; mode++) {
if (!strcmp(info->mode_list[mode].name, val))
break;
}
if (mode >= info->num_modes)
return -EINVAL;
info->mode = &info->mode_list[mode];
ret = info->fbops->fb_activate_var(info);
if (ret == 0)
dev_param_set_generic(dev, param, val);
return ret;
}
static struct file_operations fb_ops = {
.read = mem_read,
.write = mem_write,
@ -87,6 +116,12 @@ int register_framebuffer(struct fb_info *info)
dev_add_param(dev, "enable", fb_enable_set, NULL, 0);
dev_set_param(dev, "enable", "0");
if (info->num_modes && (info->mode_list != NULL) &&
(info->fbops->fb_activate_var != NULL)) {
dev_add_param(dev, "mode_name", fb_setup_mode, NULL, 0);
dev_set_param(dev, "mode_name", info->mode_list[0].name);
}
devfs_create(&info->cdev);
return 0;

3
include/fb.h
View File

@ -73,10 +73,13 @@ struct fb_ops {
unsigned blue, unsigned transp, struct fb_info *info);
void (*fb_enable)(struct fb_info *info);
void (*fb_disable)(struct fb_info *info);
int (*fb_activate_var)(struct fb_info *info);
};
struct fb_info {
struct fb_videomode *mode;
struct fb_videomode *mode_list;
unsigned num_modes;
struct fb_ops *fbops;
struct device_d dev; /* This is this fb device */