GL_POS_X_SHIFT 36 drivers/gpu/drm/zte/zx_plane_regs.h #define GL_POS_X_MASK (0x1fff << GL_POS_X_SHIFT) GL_POS_X_SHIFT 42 drivers/gpu/drm/zte/zx_plane_regs.h #define GL_POS_X(x) (((x) << GL_POS_X_SHIFT) & GL_POS_X_MASK)