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Commit 80eee6bc authored by Sascha Hauer's avatar Sascha Hauer
Browse files

i.MX Framebuffer: add TFT support 



With TFTs we can do 5/6/5 instead of 4/4/4. Add a bitfield for this
and use it with TFTs.

Acked-by: default avatarKrzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 27889273

drivers/video/imxfb.c

+19 −19
Original line number Diff line number Diff line
@@ -116,16 +116,10 @@ struct imxfb_rgb { 
	struct fb_bitfield	transp;

};



#define RGB_16	(0)

#define RGB_8	(1)

#define NR_RGB	2



struct imxfb_info {

	struct platform_device  *pdev;

	void __iomem		*regs;



	struct imxfb_rgb	*rgb[NR_RGB];



	u_int			max_bpp;

	u_int			max_xres;

	u_int			max_yres;
@@ -165,7 +159,14 @@ struct imxfb_info { 
#define MIN_XRES	64

#define MIN_YRES	64



static struct imxfb_rgb def_rgb_16 = {

static struct imxfb_rgb def_rgb_16_tft = {

	.red	= {.offset = 11, .length = 5,},

	.green	= {.offset = 5, .length = 6,},

	.blue	= {.offset = 0, .length = 5,},

	.transp = {.offset = 0, .length = 0,},

};



static struct imxfb_rgb def_rgb_16_stn = {

	.red	= {.offset = 8, .length = 4,},

	.green	= {.offset = 4, .length = 4,},

	.blue	= {.offset = 0, .length = 4,},
@@ -270,7 +271,7 @@ static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 
static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)

{

	struct imxfb_info *fbi = info->par;

	int rgbidx;

	struct imxfb_rgb *rgb;



	if (var->xres < MIN_XRES)

		var->xres = MIN_XRES;
@@ -286,23 +287,25 @@ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 
	pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);

	switch (var->bits_per_pixel) {

	case 16:

		rgbidx = RGB_16;

	default:

		if (readl(fbi->regs + LCDC_PCR) & PCR_TFT)

			rgb = &def_rgb_16_tft;

		else

			rgb = &def_rgb_16_stn;

		break;

	case 8:

		rgbidx = RGB_8;

		rgb = &def_rgb_8;

		break;

	default:

		rgbidx = RGB_16;

	}



	/*

	 * Copy the RGB parameters for this display

	 * from the machine specific parameters.

	 */

	var->red    = fbi->rgb[rgbidx]->red;

	var->green  = fbi->rgb[rgbidx]->green;

	var->blue   = fbi->rgb[rgbidx]->blue;

	var->transp = fbi->rgb[rgbidx]->transp;

	var->red    = rgb->red;

	var->green  = rgb->green;

	var->blue   = rgb->blue;

	var->transp = rgb->transp;



	pr_debug("RGBT length = %d:%d:%d:%d\n",

		var->red.length, var->green.length, var->blue.length,
@@ -545,9 +548,6 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev) 
	info->flags			= FBINFO_FLAG_DEFAULT |

					  FBINFO_READS_FAST;



	fbi->rgb[RGB_16]		= &def_rgb_16;

	fbi->rgb[RGB_8]			= &def_rgb_8;



	fbi->max_xres			= pdata->xres;

	info->var.xres			= pdata->xres;

	info->var.xres_virtual		= pdata->xres;