[media] stv090x: Fix losing lock in dual DVB-S2 mode

Do not clear registers ACLC/BCLC in DVB-S2 mode for Cut <= 20.
Otherwise, the demod could lose the lock periodically.
Verified with cineS2 and Duoflex.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/media/dvb/frontends/stv090x.c b/drivers/media/dvb/frontends/stv090x.c
index eccad06216ce..e3442a14e5b2 100644
--- a/drivers/media/dvb/frontends/stv090x.c
+++ b/drivers/media/dvb/frontends/stv090x.c
@@ -2894,10 +2894,12 @@ static int stv090x_optimize_track(struct stv090x_state *state)
                 STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
                 if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                         goto err;
-                if (STV090x_WRITE_DEMOD(state, ACLC, 0) < 0)
-                        goto err;
-                if (STV090x_WRITE_DEMOD(state, BCLC, 0) < 0)
-                        goto err;
+                if (state->internal->dev_ver >= 0x30) {
+                        if (STV090x_WRITE_DEMOD(state, ACLC, 0) < 0)
+                                goto err;
+                        if (STV090x_WRITE_DEMOD(state, BCLC, 0) < 0)
+                                goto err;
+                }
                 if (state->frame_len == STV090x_LONG_FRAME) {
                         reg = STV090x_READ_DEMOD(state, DMDMODCOD);
                         modcod = STV090x_GETFIELD_Px(reg, DEMOD_MODCOD_FIELD);