INTEL_PIPE_COLOR_SHIFT
#define INTEL_PIPE_BPC(x) ((x) << INTEL_PIPE_COLOR_SHIFT)
#define INTEL_PIPE_BPC_MASK (7 << INTEL_PIPE_COLOR_SHIFT)
(read32(INTEL_DISPLAY_A_PIPE_CONTROL) & INTEL_PIPE_BPC_MASK) >> INTEL_PIPE_COLOR_SHIFT;