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: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index 3d1db00..d58c68c 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -116,16 +116,10 @@
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 @@
#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_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 @@
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 @@
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;