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atmel_lcdfb: support new-style palette format 

The newer Atmel SoCs use normal 16bit 565 BGR/RGB for the palette data,
rather than the special intensity + 555 format.

Fill out palette data correctly on these devices, and at the same time
respect the RGB/BGR wiring mode.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This commit is contained in:
Peter Korsgaard 2011-10-13 16:45:52 +02:00 committed by Florian Tobias Schandinat
parent acfdc2e1bd
commit 5d67b89ce8
1 changed files with 23 additions and 7 deletions
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30
drivers/video/atmel_lcdfb.c
View File

@ -684,14 +684,30 @@ static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
case FB_VISUAL_PSEUDOCOLOR:
if (regno < 256) {
val = ((red >> 11) & 0x001f);
val |= ((green >> 6) & 0x03e0);
val |= ((blue >> 1) & 0x7c00);
if (cpu_is_at91sam9261() || cpu_is_at91sam9263()
|| cpu_is_at91sam9rl()) {
/* old style I+BGR:555 */
val = ((red >> 11) & 0x001f);
val |= ((green >> 6) & 0x03e0);
val |= ((blue >> 1) & 0x7c00);
/*
* TODO: intensity bit. Maybe something like
* ~(red[10] ^ green[10] ^ blue[10]) & 1
*/
/*
* TODO: intensity bit. Maybe something like
* ~(red[10] ^ green[10] ^ blue[10]) & 1
*/
} else {
/* new style BGR:565 / RGB:565 */
if (sinfo->lcd_wiring_mode ==
ATMEL_LCDC_WIRING_RGB) {
val = ((blue >> 11) & 0x001f);
val |= ((red >> 0) & 0xf800);
} else {
val = ((red >> 11) & 0x001f);
val |= ((blue >> 0) & 0xf800);
}
val |= ((green >> 5) & 0x07e0);
}
lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
ret = 0;