  We discuss flavour dependent leptogenesis in the framework of lepton flavour
models based on discrete flavour and CP symmetries applied to the type-I seesaw
model. Working in the flavour basis, we analyse the case of two general
residual CP symmetries in the neutrino sector, which corresponds to all
possible semi-direct models based on a preserved $Z_2$ in the neutrino sector,
together with a CP symmetry, which constrains the PMNS matrix up to a single
free parameter which may be fixed by the reactor angle. We systematically study
and classify this case for all possible residual CP symmetries, and show that
the $R$-matrix is tightly constrained up to a single free parameter, with only
certain forms being consistent with successful leptogenesis, leading to
possible connections between leptogenesis and PMNS parameters. The formalism is
completely general in the sense that the two residual CP symmetries could
result from any high energy discrete flavour theory which respects any CP
symmetry. As a simple example, we apply the formalism to a high energy $S_4$
flavour symmetry with a generalized CP symmetry, broken to two residual CP
symmetries in the neutrino sector, recovering familiar results for PMNS
predictions, together with new results for flavour dependent leptogenesis.
