V4L/DVB (9443): Bug: Bandwidth calculation
Bug #1: The 5 tap equaliser is set to correct simple perturbations
like reflections on the IF cable for DVB-S. In the case of DVB-S2
a more powerful equalizer is used to correct the filter group delay
allowing the bandwidth to be reduced by a factor of 1/3
Bug #2: The ZIF tuner takes badwidth to be set in Hz
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/stb6100.c b/drivers/media/dvb/frontends/stb6100.c
index d19a3bf..f4c2b8e 100644
--- a/drivers/media/dvb/frontends/stb6100.c
+++ b/drivers/media/dvb/frontends/stb6100.c
@@ -269,7 +269,7 @@
dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u kHz", bandwidth);
- bandwidth *= 1000 / 2; /* kHz -> Hz, bw / 2 */
+ bandwidth /= 2; /* ZIF */
if (bandwidth > 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
tmp = 31;