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>
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@ -684,6 +684,9 @@ static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
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case FB_VISUAL_PSEUDOCOLOR:
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if (regno < 256) {
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if (cpu_is_at91sam9261() || cpu_is_at91sam9263()
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|| cpu_is_at91sam9rl()) {
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/* old style I+BGR:555 */
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val = ((red >> 11) & 0x001f);
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val |= ((green >> 6) & 0x03e0);
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val |= ((blue >> 1) & 0x7c00);
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@ -692,6 +695,19 @@ static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
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* TODO: intensity bit. Maybe something like
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* ~(red[10] ^ green[10] ^ blue[10]) & 1
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*/
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} else {
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/* new style BGR:565 / RGB:565 */
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if (sinfo->lcd_wiring_mode ==
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ATMEL_LCDC_WIRING_RGB) {
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val = ((blue >> 11) & 0x001f);
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val |= ((red >> 0) & 0xf800);
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} else {
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val = ((red >> 11) & 0x001f);
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val |= ((blue >> 0) & 0xf800);
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}
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val |= ((green >> 5) & 0x07e0);
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}
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lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
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ret = 0;
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