/**
* s3c_fb_check_var() - framebuffer layer request to verify a given mode.
* @var: The screen information to verify.
* @info: The framebuffer device.
*
* Framebuffer layer call to verify the given information and allow us to
* update various information depending on the hardware capabilities.
*/
static int s3c_fb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct s3c_fb_win *win = info->par;
struct s3c_fb *sfb = win->parent;
dev_dbg(sfb->dev, "checking parameters\n");
var->xres_virtual = max(var->xres_virtual, var->xres);
var->yres_virtual = max(var->yres_virtual, var->yres);
if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) {
dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
win->index, var->bits_per_pixel);
return -EINVAL;
}
/* always ensure these are zero, for drop through cases below */
var->transp.offset = 0;
var->transp.length = 0;
switch (var->bits_per_pixel) {
case 1:
case 2:
case 4
/**
* s3c_fb_check_var() - framebuffer layer request to verify a given mode.
* @var: The screen information to verify.
* @info: The framebuffer device.
*
* Framebuffer layer call to verify the given information and allow us to
* update various information depending on the hardware capabilities.
*/
static int s3c_fb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct s3c_fb_win *win = info->par;
struct s3c_fb_pd_win *windata = win->windata;
struct s3c_fb *sfb = win->parent;
dev_dbg(sfb->dev, "checking parameters\n");
var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres);
var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres);
if (!s3c_fb_validate_win_bpp(win->index, var->bits_per_pixel)) {
dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
win->index, var->bits_per_pixel);
return -EINVAL;
}
/* always ensure these are zero, for drop through cases below */
var->transp.offset = 0;
var->transp.length = 0;
switch (var->bits_per_pixel) {
case 1:
case 2:
case 4:
case 8:
if (!s3c_fb_win_has_palette(win->index, var->bits_per_pixel)) {
/* non palletised, A:1,R:2,G:3,B:2 mode */
var->red.offset = 4;
var->green.offset = 2;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 3;
var->blue.length = 2;
var->transp.offset = 7;
var->transp.length = 1;
} else {
var->red.offset = 0;
var->red.length = var->bits_per_pixel;
var->green = var->red;
var->blue = var->red;
}
break;
case 19:
/* 666 with one bit alpha/transparency */
var->transp.offset = 18;
var->transp.length = 1;
case 18:
var->bits_per_pixel = 32;
/* 666 format */
var->red.offset = 12;
var->green.offset = 6;
var->blue.offset = 0;
var->red.length = 6;
var->green.length = 6;
var->blue.length = 6;
break;
case 16:
/* 16 bpp, 565 format */
var->red.offset = 11;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
break;
case 28:
case 25:
var->transp.length = var->bits_per_pixel - 24;
var->transp.offset = 24;
/* drop through */
case 24:
/* our 24bpp is unpacked, so 32bpp */
var->bits_per_pixel = 32;
case 32:
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
break;
default:
dev_err(sfb->dev, "invalid bpp\n");
}
dev_dbg(sfb->dev, "%s: verified parameters\n", __func__);
return 0;
}
static int s3c_fb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct s3c_fb_win *win = info->par;
struct s3c_fb *sfb = win->parent;
dev_dbg(sfb->dev, "checking parameters\n");
var->xres_virtual = max(var->xres_virtual, var->xres);
var->yres_virtual = max(var->yres_virtual, var->yres);
if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) {
dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
win->index, var->bits_per_pixel);
return -EINVAL;
}
var->transp.offset = 0;
var->transp.length = 0;
switch (var->bits_per_pixel) {
case 1:
case 2:
case 4:
case 8:
if (sfb->variant.palette[win->index] != 0) {
var->red.offset = 4;
var->green.offset = 2;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 3;
var->blue.length = 2;
var->transp.offset = 7;
var->transp.length = 1;
} else {
var->red.offset = 0;
var->red.length = var->bits_per_pixel;
var->green = var->red;
var->blue = var->red;
}
break;
case 19:
var->transp.offset = 18;
var->transp.length = 1;
case 18:
var->bits_per_pixel = 32;
var->red.offset = 12;
var->green.offset = 6;
var->blue.offset = 0;
var->red.length = 6;
var->green.length = 6;
var->blue.length = 6;
break;
case 16:
var->red.offset = 11;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
break;
case 32:
case 28:
case 25:
var->transp.length = var->bits_per_pixel - 24;
var->transp.offset = 24;
case 24:
var->bits_per_pixel = 32;
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
break;
default:
dev_err(sfb->dev, "invalid bpp\n");
}
dev_dbg(sfb->dev, "%s: verified parameters\n", __func__);
return 0;
}