quoted

No, bits_per_pixel can be (much) larger than the color map size. E.g. a simple
ARGB8888 directcolor mode has bits_per_pixel = 32 and color map size = 256.

So I have the bits_per_pixel attribute wrong in sysfs. It needs to be
bits_per_color and then let the driver sort it out.  Otherwise there
is no way to set ARGB8888 versus ARGB2101010. With bits per color you
would set 8 or 10.

You would need bits_per_read, bit_per_green. This doesn't event count the 
other color spaces avaliable like YUV.



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