While the documentation mentions the delivery system DSS as a satellite
system, it was missing from all but one switch statement in the DVB
frontend code, leading to tuning failures, because the frequency was not
correctly handled as being in kHz rather than Hz.
Add the missing switch cases so that DSS is handled like the other
satellite systems. For the rolloff, assume 0.20 as per one publication
found via Internet search.
Link: https://lore.kernel.org/linux-media/trinity-5f5afda9-657a-4a91-bf15-842f4f249535-1641958421391@3c-app-gmx-bap21
Signed-off-by: Robert Schlabbach <robert_s@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
/* If the standard is for satellite, convert frequencies to kHz */
switch (c->delivery_system) {
+ case SYS_DSS:
case SYS_DVBS:
case SYS_DVBS2:
case SYS_TURBO:
u32 step = max(fe_step, tuner_step);
switch (c->delivery_system) {
+ case SYS_DSS:
case SYS_DVBS:
case SYS_DVBS2:
case SYS_TURBO:
/* range check: symbol rate */
switch (c->delivery_system) {
+ case SYS_DSS:
case SYS_DVBS:
case SYS_DVBS2:
case SYS_TURBO:
c->scrambling_sequence_index = 0;/* default sequence */
switch (c->delivery_system) {
+ case SYS_DSS:
+ c->modulation = QPSK;
+ c->rolloff = ROLLOFF_20;
+ break;
case SYS_DVBS:
case SYS_DVBS2:
case SYS_TURBO:
} else {
/* default values */
switch (c->delivery_system) {
+ case SYS_DSS:
case SYS_DVBS:
case SYS_DVBS2:
case SYS_ISDBS:
case SYS_DVBC_ANNEX_C:
rolloff = 113;
break;
+ case SYS_DSS:
+ rolloff = 120;
+ break;
case SYS_DVBS:
case SYS_TURBO:
case SYS_ISDBS: