Hi,
here a small patch to get a TwinHan VT DST DVB-T card working with
kernels >= 2.6.32. Analogously to
http://linuxtv.org/hg/v4l-dvb/rev/0e735b509163 I had to:
"Fill in the .caps field in struct dst_dvbt_ops (around line 1763) with
all the supported QAM modulation methods to match the capabilities of
the card as implemented in function dst_set_modulation (around line
502). Note that beginning with linux kernel version 2.6.32 the
modulation method is checked (by function dvb_frontend_check_parameters
in file drivers/media/dvb/dvb-core/dvb_frontend.c) and thus tuning fails
if you use a modulation method that is not present in the .caps field."
Patch:
diff -r 9652f85e688a linux/drivers/media/dvb/bt8xx/dst.c
--- a/linux/drivers/media/dvb/bt8xx/dst.c Thu May 27 02:02:09 2010 -0300
+++ b/linux/drivers/media/dvb/bt8xx/dst.c Tue Jul 27 09:34:38 2010 +0200
@@ -1763,7 +1763,15 @@
.frequency_min = 137000000,
.frequency_max = 858000000,
.frequency_stepsize = 166667,
- .caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO
+ .caps = FE_CAN_FEC_AUTO |
+ FE_CAN_QAM_AUTO |
+ FE_CAN_QAM_16 |
+ FE_CAN_QAM_32 |
+ FE_CAN_QAM_64 |
+ FE_CAN_QAM_128 |
+ FE_CAN_QAM_256 |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO
},
.release = dst_release,
---------------------8<--------------------------
Tested on 2.6.32-24, works fine. Thanks to Klaas de Waal for creating
the original patch for the DVB-C cards.
Hope this helps someone,
Arne
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