On 10-01-2012 19:36, Antti Palosaari wrote: > Behaviour of new FE is strange for my eyes. Could you look and explain if it is intentional? > > [crope@localhost dvb]$ ./dvb-fe-tool > Device Sony CXD2820R (DVB-T/T2) (/dev/dvb/adapter0/frontend0) capabilities: > CAN_2G_MODULATION CAN_FEC_1_2 CAN_FEC_2_3 CAN_FEC_3_4 CAN_FEC_5_6 CAN_FEC_7_8 CAN_FEC_AUTO CAN_GUARD_INTERVAL_AUTO CAN_HIERARCHY_AUTO CAN_INVERSION_AUTO CAN_MUTE_TS CAN_QAM_16 CAN_QAM_64 CAN_QAM_256 CAN_QAM_AUTO CAN_QPSK CAN_TRANSMISSION_MODE_AUTO > DVB API Version 5.5, Current v5 delivery system: DVBT > Supported delivery systems: [DVBT] DVBT2 DVBC/ANNEX_A > [crope@localhost dvb]$ czap "MTV3 " > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' > reading channels from file '/home/crope/.czap/channels.conf' > 11 MTV3 :330000000:INVERSION_AUTO:6875000:FEC_NONE:QAM_128:305:561:3 > 11 MTV3 : f 330000000, s 6875000, i 2, fec 0, qam 4, v 0x131, a 0x231, s 0x3 > ERROR: frontend device is not a QAM (DVB-C) device The selected delivery system is DVB-T. As czap doesn't have any code to force it to DVB-C, this is expected. Basically, czap needs a patch like this one: http://linuxtv.org/hg/dvb-apps/rev/0c9932885287 (I've made the patch for scan just as an example, but I'll hardly have enough time to fix it everything inside dvb-apps) > [crope@localhost dvb]$ ./dvb-fe-tool --set-delsys=DVBC/ANNEX_A > Device Sony CXD2820R (DVB-T/T2) (/dev/dvb/adapter0/frontend0) capabilities: > CAN_2G_MODULATION CAN_FEC_1_2 CAN_FEC_2_3 CAN_FEC_3_4 CAN_FEC_5_6 CAN_FEC_7_8 CAN_FEC_AUTO CAN_GUARD_INTERVAL_AUTO CAN_HIERARCHY_AUTO CAN_INVERSION_AUTO CAN_MUTE_TS CAN_QAM_16 CAN_QAM_64 CAN_QAM_256 CAN_QAM_AUTO CAN_QPSK CAN_TRANSMISSION_MODE_AUTO > DVB API Version 5.5, Current v5 delivery system: DVBT > Supported delivery systems: [DVBT] DVBT2 DVBC/ANNEX_A > Changing delivery system to: DVBC/ANNEX_A > [crope@localhost dvb]$ ./dvb-fe-tool > Device Sony CXD2820R (DVB-T/T2) (/dev/dvb/adapter0/frontend0) capabilities: > CAN_2G_MODULATION CAN_FEC_1_2 CAN_FEC_2_3 CAN_FEC_3_4 CAN_FEC_5_6 CAN_FEC_7_8 CAN_FEC_AUTO CAN_GUARD_INTERVAL_AUTO CAN_HIERARCHY_AUTO CAN_INVERSION_AUTO CAN_MUTE_TS CAN_QAM_16 CAN_QAM_64 CAN_QAM_256 CAN_QAM_AUTO CAN_QPSK CAN_TRANSMISSION_MODE_AUTO > DVB API Version 5.5, Current v5 delivery system: DVBC/ANNEX_A > Supported delivery systems: DVBT DVBT2 [DVBC/ANNEX_A] > [crope@localhost dvb]$ czap "MTV3 " > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' > reading channels from file '/home/crope/.czap/channels.conf' > 11 MTV3 :330000000:INVERSION_AUTO:6875000:FEC_NONE:QAM_128:305:561:3 > 11 MTV3 : f 330000000, s 6875000, i 2, fec 0, qam 4, v 0x131, a 0x231, s 0x3 > status 00 | signal ffff | snr 00c6 | ber 00000000 | unc 00000000 | Ok, it worked. > [crope@localhost dvb]$ ./dvb-fe-tool > Device Sony CXD2820R (DVB-T/T2) (/dev/dvb/adapter0/frontend0) capabilities: > CAN_2G_MODULATION CAN_FEC_1_2 CAN_FEC_2_3 CAN_FEC_3_4 CAN_FEC_5_6 CAN_FEC_7_8 CAN_FEC_AUTO CAN_GUARD_INTERVAL_AUTO CAN_HIERARCHY_AUTO CAN_INVERSION_AUTO CAN_MUTE_TS CAN_QAM_16 CAN_QAM_64 CAN_QAM_256 CAN_QAM_AUTO CAN_QPSK CAN_TRANSMISSION_MODE_AUTO > DVB API Version 5.5, Current v5 delivery system: DVBT > Supported delivery systems: [DVBT] DVBT2 DVBC/ANNEX_A That's weird. The dvb_frontend_clear_cache() returns the delivery system to its original state. The enclosed patch will likely fix this issue. - [PATCH] don't reset the delivery system on DTV_CLEAR Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index a904793..4ff4b43 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -909,7 +909,6 @@ static int dvb_frontend_clear_cache(struct dvb_frontend *fe) c->state = DTV_CLEAR; - c->delivery_system = fe->ops.delsys[0]; dprintk("%s() Clearing cache for delivery system %d\n", __func__, c->delivery_system); @@ -2377,6 +2376,8 @@ int dvb_register_frontend(struct dvb_adapter* dvb, * Initialize the cache to the proper values according with the * first supported delivery system (ops->delsys[0]) */ + + c->delivery_system = fe->ops.delsys[0]; dvb_frontend_clear_cache(fe); mutex_unlock(&frontend_mutex); -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
