Constant imxrt_ral::lcdif::CTRL_TOG::DATA_FORMAT_18_BIT::RW::UPPER_18_BITS_VALID

pub const UPPER_18_BITS_VALID: u32 = 0x01;

Data input to the block is in 18 bpp format, such that upper 18 bits contain RGB 666 and lower 14 bits do not contain any useful data.