redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

AUO-K190x: add a 16bit truecolor mode

Browse source 
Some applications seem to have problems using the 8bit grayscale mode.
Therefore provide a 16bit truecolor mode which also gets converted to
the 4bit grayscale the display uses, when updating a region.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Heiko Stübner 2013-03-22 15:16:29 +01:00 committed by Tomi Valkeinen
parent 76de404b45
commit 46574c72c7
1 changed files with 69 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

71
drivers/video/auo_k190x.c
View file

@ -60,6 +60,46 @@ static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data)
par->board->set_ctl(par, AUOK190X_I80_DC, 1);
}
/**
* Conversion of 16bit color to 4bit grayscale
* does roughly (0.3 * R + 0.6 G + 0.1 B) / 2
*/
static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var)
{
return ((((data & 0xF800) >> var->red.offset) * 77 +
((data & 0x07E0) >> (var->green.offset + 1)) * 151 +
((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1);
}
static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size,
u16 *data)
{
struct fb_var_screeninfo *var = &par->info->var;
struct device *dev = par->info->device;
int i;
u16 tmp;
if (size & 7) {
dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n",
size);
return -EINVAL;
}
for (i = 0; i < (size >> 2); i++) {
par->board->set_ctl(par, AUOK190X_I80_WR, 0);
tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F);
tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0;
tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00;
tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000;
par->board->set_hdb(par, tmp);
par->board->set_ctl(par, AUOK190X_I80_WR, 1);
}
return 0;
}
static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size,
u16 *data)
{
@ -99,6 +139,8 @@ static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
if (info->var.bits_per_pixel == 8 && info->var.grayscale)
auok190x_issue_pixels_gray8(par, size, data);
else if (info->var.bits_per_pixel == 16)
auok190x_issue_pixels_rgb565(par, size, data);
else
dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n",
info->var.bits_per_pixel, info->var.grayscale);
@ -416,6 +458,22 @@ static int auok190xfb_check_var(struct fb_var_screeninfo *var,
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
} else if (var->bits_per_pixel == 16) {
var->red.length = 5;
var->red.offset = 11;
var->red.msb_right = 0;
var->green.length = 6;
var->green.offset = 5;
var->green.msb_right = 0;
var->blue.length = 5;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
@ -472,6 +530,15 @@ static int auok190xfb_set_fix(struct fb_info *info)
return 0;
}
static int auok190xfb_set_par(struct fb_info *info)
{
struct auok190xfb_par *par = info->par;
auok190xfb_set_fix(info);
return 0;
}
static struct fb_ops auok190xfb_ops = {
.owner = THIS_MODULE,
.fb_read = fb_sys_read,
@ -480,6 +547,7 @@ static struct fb_ops auok190xfb_ops = {
.fb_copyarea = auok190xfb_copyarea,
.fb_imageblit = auok190xfb_imageblit,
.fb_check_var = auok190xfb_check_var,
.fb_set_par = auok190xfb_set_par,
};
/*
@ -966,8 +1034,7 @@ int auok190x_common_probe(struct platform_device *pdev,
/* videomemory handling */
videomemorysize = roundup((panel->w * panel->h) *
info->var.bits_per_pixel / 8, PAGE_SIZE);
videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE);
videomemory = vmalloc(videomemorysize);
if (!videomemory) {
ret = -ENOMEM;