/**
* s3cfb_pan_display
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
*
* Pan (or wrap, depending on the `vmode' field) the display using the
* `xoffset' and `yoffset' fields of the `var' structure.
* If the values don't fit, return -EINVAL.
*
* Returns negative errno on error, or zero on success.
*/
static int s3cfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
s3c_fb_info_t *fbi = (s3c_fb_info_t *)info;
DPRINTK("s3c_fb_pan_display(var=%p, info=%p)\n", var, info);
if (var->xoffset != 0)
{
printk("%s::var->xoffset(%d)\n", __func__, var->xoffset);
return -EINVAL;
}
if (var->yoffset + info->var.yres > info->var.yres_virtual)
{
printk("%s::var->yoffset(%d) + info->var.yres(%d) > info->var.yres_virtual(%d)\n", __func__,
var->yoffset, info->var.yres, info->var.yres_virtual);
return -EINVAL;
}
fbi->fb.var.xoffset = var->xoffset;
fbi->fb.var.yoffset = var->yoffset;
s3cfb_set_fb_addr(fbi);
return 0;
}
/**
* s3cfb_pan_display
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
*
* Pan (or wrap, depending on the `vmode' field) the display using the
* `xoffset' and `yoffset' fields of the `var' structure.
* If the values don't fit, return -EINVAL.
*
* Returns negative errno on error, or zero on success.
*/
static int s3cfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct s3c_fb_info *fbi = (struct s3c_fb_info *)info;
/*
* All values are checked for correctness in fbmem.c,
* so let's just apply the new parameters.
*/
fbi->fb_start_addr = fbi->map_dma + var->yoffset * fbi->fb.fix.line_length;
fbi->fb_end_addr = fbi->fb_start_addr + var->yres * fbi->fb.fix.line_length;
s3cfb_set_fb_addr(fbi);
return 0;
}
/**
* s3cfb_pan_display
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
*
* Pan (or wrap, depending on the `vmode' field) the display using the
* `xoffset' and `yoffset' fields of the `var' structure.
* If the values don't fit, return -EINVAL.
*
* Returns negative errno on error, or zero on success.
*/
static int s3cfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
s3cfb_info_t *fbi = (s3cfb_info_t *)info;
DPRINTK("s3c_fb_pan_display(var=%p, info=%p)\n", var, info);
if (var->xoffset != 0)
return -EINVAL;
if (var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
fbi->fb.var.xoffset = var->xoffset;
fbi->fb.var.yoffset = var->yoffset;
s3cfb_set_fb_addr(fbi);
return 0;
}