AUO-K190x: add a 16bit truecolor mode
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>
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@ -60,6 +60,46 @@ static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data)
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par->board->set_ctl(par, AUOK190X_I80_DC, 1);
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}
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/**
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* Conversion of 16bit color to 4bit grayscale
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* does roughly (0.3 * R + 0.6 G + 0.1 B) / 2
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*/
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static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var)
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{
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return ((((data & 0xF800) >> var->red.offset) * 77 +
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((data & 0x07E0) >> (var->green.offset + 1)) * 151 +
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((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1);
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}
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static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size,
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u16 *data)
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{
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struct fb_var_screeninfo *var = &par->info->var;
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struct device *dev = par->info->device;
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int i;
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u16 tmp;
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if (size & 7) {
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dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n",
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size);
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return -EINVAL;
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}
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for (i = 0; i < (size >> 2); i++) {
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par->board->set_ctl(par, AUOK190X_I80_WR, 0);
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tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F);
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tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0;
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tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00;
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tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000;
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par->board->set_hdb(par, tmp);
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par->board->set_ctl(par, AUOK190X_I80_WR, 1);
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}
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return 0;
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}
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static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size,
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u16 *data)
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{
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@ -99,6 +139,8 @@ static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
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if (info->var.bits_per_pixel == 8 && info->var.grayscale)
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auok190x_issue_pixels_gray8(par, size, data);
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else if (info->var.bits_per_pixel == 16)
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auok190x_issue_pixels_rgb565(par, size, data);
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else
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dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n",
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info->var.bits_per_pixel, info->var.grayscale);
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@ -416,6 +458,22 @@ static int auok190xfb_check_var(struct fb_var_screeninfo *var,
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var->blue.offset = 0;
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var->blue.msb_right = 0;
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var->transp.length = 0;
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var->transp.offset = 0;
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var->transp.msb_right = 0;
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} else if (var->bits_per_pixel == 16) {
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var->red.length = 5;
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var->red.offset = 11;
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var->red.msb_right = 0;
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var->green.length = 6;
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var->green.offset = 5;
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var->green.msb_right = 0;
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var->blue.length = 5;
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var->blue.offset = 0;
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var->blue.msb_right = 0;
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var->transp.length = 0;
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var->transp.offset = 0;
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var->transp.msb_right = 0;
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@ -472,6 +530,15 @@ static int auok190xfb_set_fix(struct fb_info *info)
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return 0;
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}
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static int auok190xfb_set_par(struct fb_info *info)
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{
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struct auok190xfb_par *par = info->par;
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auok190xfb_set_fix(info);
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return 0;
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}
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static struct fb_ops auok190xfb_ops = {
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.owner = THIS_MODULE,
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.fb_read = fb_sys_read,
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@ -480,6 +547,7 @@ static struct fb_ops auok190xfb_ops = {
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.fb_copyarea = auok190xfb_copyarea,
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.fb_imageblit = auok190xfb_imageblit,
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.fb_check_var = auok190xfb_check_var,
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.fb_set_par = auok190xfb_set_par,
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};
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/*
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@ -966,8 +1034,7 @@ int auok190x_common_probe(struct platform_device *pdev,
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/* videomemory handling */
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videomemorysize = roundup((panel->w * panel->h) *
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info->var.bits_per_pixel / 8, PAGE_SIZE);
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videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE);
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videomemory = vmalloc(videomemorysize);
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if (!videomemory) {
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ret = -ENOMEM;
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