i have two cards both of them are for dmb-th (mainly used in china and
hong kong). however, these two cards stop working after upgraded the
kernel to 3.3. sadly the drivers were writen by a person David Wong
who has been passed away. i traced the code and found a function
set_delivery_system which assign a value SYS_UNDEFINED in the
frontend's delivery_system.
i am not quite understand the logic below which is a segment of code
inside the function set_delivery_system
fe->ops.delsys[ncapes] = 13 (SYS_DMBTH)
and desired_system = 3 (SYS_DVBT)
ncaps = 0;
while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
if (fe->ops.delsys[ncaps] == desired_system) {
delsys = desired_system;
break;
}
ncaps++;
}
// still not find anything
if (delsys == SYS_UNDEFINED) {
dprintk("%s() Couldn't find a delivery system
that matches %d\n",
__func__, desired_system);
}
after these codes, c->delivery_system is set to be SYS_UNDERFINED and
all function after failed.
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