atmel_lcdfb: use spare bits in 32bpp mode as alpha channel
Set var->transp.offset and var->transp.length in 32bpp mode to indicate that the 8 otherwise unused bits can be used for transparency. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -219,8 +219,11 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
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var->blue.offset = 10;
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var->red.length = var->green.length = var->blue.length = 5;
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break;
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case 24:
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case 32:
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var->transp.offset = 24;
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var->transp.length = 8;
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/* fall through */
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case 24:
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var->red.offset = 0;
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var->green.offset = 8;
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var->blue.offset = 16;
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