PAL_MAX
if (pal < 0 || pal >= PAL_MAX * 2) {
pal = (bpp >= 16) ? PAL_NONE : PAL_BASE + (branch ? PAL_MAX : 0);
unsigned char palette[PAL_MAX * PALETTE_SIZE];
struct pxafb_dma_descriptor pal_desc[PAL_MAX * 2];