From: Zoran Turalija <zoran.turalija@gmail.com>
Date: Sun, 2 Jun 2013 17:56:33 +0000 (-0300)
Subject: [media] stb0899: allow minimum symbol rate of 2000000
X-Git-Tag: firefly_0821_release~176^2~3573^2~1850
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=55b3318b3a49488a14ccfceffde668d548c4e427;p=firefly-linux-kernel-4.4.55.git
[media] stb0899: allow minimum symbol rate of 2000000
Looks like product datasheets for tuners containing STB0899 are
suggesting specification for min. symbol rate of 2MS/s.
Some specs found here, all suggesting 2MS/s for min. symbol rate:
Comtech DVBS2-6899
http://comtech.sg1002.myweb.hinet.net/pdf/dvbs2-6899.pdf
TechniSat SkyStar HD2
http://www.scaistar.com/skystar2/skystarhd2.htm
Azurewave AD-SP400
http://www.pulsat.com/products/AzureWave-AD%252dSP400-High-Definition-PC-Card.html
New patch:
This makes minimum symbol rate driver capabilities on par with some
accessible datasheet specifications*, and allows tuning on linux to
transponders that have symbol rate between 2000000-5000000, too.
Patch was tested successfully on Eutelsat 16A transponders that
became reachable with it (2000000 < symbol rate < 5000000):
* DVB/S 12507050 V 2532000 3/4
* DVB/S2 12574000 V 4355000 3/4 8PSK
* DVB/S 12593000 V 2500000 2/3
* DVB/S 12596940 V 2848000 2/3
* DVB/S 12600750 V 2500000 1/2
* DVB/S 12675590 H 4248000 3/4
(*) Datasheet: http://comtech.sg1002.myweb.hinet.net/pdf/dvbs2-6899.pdf
Maximum Symbol Rate
QPSK/LDPC/PCH: 20-30Mbps
8PSK/LDPC/BCH: 10-30Mbps
DVB: 2-45Mbps
^--------- min. symbol rate
Signed-off-by: Zoran Turalija <zoran.turalija@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
diff --git a/drivers/media/dvb-frontends/stb0899_drv.c b/drivers/media/dvb-frontends/stb0899_drv.c
index 527f5c3e0be9..b3ccd3dbbda1 100644
--- a/drivers/media/dvb-frontends/stb0899_drv.c
+++ b/drivers/media/dvb-frontends/stb0899_drv.c
@@ -1581,7 +1581,7 @@ static struct dvb_frontend_ops stb0899_ops = {
.frequency_max = 2150000,
.frequency_stepsize = 0,
.frequency_tolerance = 0,
- .symbol_rate_min = 1000000,
+ .symbol_rate_min = 2000000,
.symbol_rate_max = 45000000,
.caps = FE_CAN_INVERSION_AUTO |