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/stb0899_drv.c b/drivers/media/dvb/frontends/stb0899_drv.c
index d213964..4596119 100644
--- a/drivers/media/dvb/frontends/stb0899_drv.c
+++ b/drivers/media/dvb/frontends/stb0899_drv.c
@@ -1554,8 +1554,7 @@
}
dprintk(verbose, FE_DEBUG, 1, "delivery system=%d", state->delsys);
- SearchRange = 3000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */
-// SearchRange = 10000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */
+ SearchRange = 10000000;
dprintk(verbose, FE_DEBUG, 1, "Frequency=%d, Srate=%d", i_params->freq, i_params->srate);
/* checking Search Range is meaningless for a fixed 3 Mhz */
if (INRANGE(i_params->srate, 1000000, 45000000)) {
@@ -1626,7 +1625,7 @@
internal->srch_range = SearchRange;
if (state->config->tuner_set_bandwidth)
- state->config->tuner_set_bandwidth(fe, (135 * (stb0899_carr_width(state) + SearchRange)) / 100);
+ state->config->tuner_set_bandwidth(fe, (stb0899_carr_width(state) + SearchRange));
if (state->config->tuner_get_bandwidth)
state->config->tuner_get_bandwidth(fe, &internal->tuner_bw);