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atmel_lcdfb: fix 16-bpp modes on older SOCs

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Fix regression introduced by commit 787f9fd232 ("atmel_lcdfb: support
16bit BGR:565 mode, remove unsupported 15bit modes") which broke 16-bpp
modes for older SOCs which use IBGR:555 (msb is intensity) rather
than BGR:565.

Use SOC-type to determine the pixel layout.

Tested on at91sam9263 and at91sam9g45.

Cc: <stable@vger.kernel.org>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Johan Hovold 2013-02-05 14:35:11 +01:00 committed by Nicolas Ferre
parent f6161aa153
commit a79eac7165
2 changed files with 16 additions and 7 deletions
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22
drivers/video/atmel_lcdfb.c
View File

@ -422,17 +422,22 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
= var->bits_per_pixel;
break;
case 16:
/* Older SOCs use IBGR:555 rather than BGR:565. */
if (sinfo->have_intensity_bit)
var->green.length = 5;
else
var->green.length = 6;
if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
/* RGB:565 mode */
var->red.offset = 11;
/* RGB:5X5 mode */
var->red.offset = var->green.length + 5;
var->blue.offset = 0;
} else {
/* BGR:565 mode */
/* BGR:5X5 mode */
var->red.offset = 0;
var->blue.offset = 11;
var->blue.offset = var->green.length + 5;
}
var->green.offset = 5;
var->green.length = 6;
var->red.length = var->blue.length = 5;
break;
case 32:
@ -679,8 +684,7 @@ static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
case FB_VISUAL_PSEUDOCOLOR:
if (regno < 256) {
if (cpu_is_at91sam9261() || cpu_is_at91sam9263()
|| cpu_is_at91sam9rl()) {
if (sinfo->have_intensity_bit) {
/* old style I+BGR:555 */
val = ((red >> 11) & 0x001f);
val |= ((green >> 6) & 0x03e0);
@ -870,6 +874,10 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
}
sinfo->info = info;
sinfo->pdev = pdev;
if (cpu_is_at91sam9261() || cpu_is_at91sam9263() ||
cpu_is_at91sam9rl()) {
sinfo->have_intensity_bit = true;
}
strcpy(info->fix.id, sinfo->pdev->name);
info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;

1
include/video/atmel_lcdc.h
View File

@ -62,6 +62,7 @@ struct atmel_lcdfb_info {
void (*atmel_lcdfb_power_control)(int on);
struct fb_monspecs *default_monspecs;
u32 pseudo_palette[16];
bool have_intensity_bit;
};
#define ATMEL_LCDC_DMABADDR1 0x00