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authorOlivier Grenie <olivier.grenie@dibcom.fr>2010-09-07 12:50:46 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-09-27 22:21:58 -0300
commit970d14c6cca8c71307a4d23fe373c5895175b2d7 (patch)
tree238df31ec325c07c4e845e5a8a2e989de4454d10 /drivers/media/dvb/frontends
parent90e12cec707204930934acdb5efce5f94a163a5f (diff)
V4L/DVB: dib7000p: add disable sample and hold, and diversity delay parameter
This patch improves the overall driver performance in diversity-reception scenarios. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/frontends')
-rw-r--r--drivers/media/dvb/frontends/dib7000p.c6
-rw-r--r--drivers/media/dvb/frontends/dib7000p.h2
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 73f59ab06c8..3aed0d43392 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -260,6 +260,7 @@ static void dib7000p_set_adc_state(struct dib7000p_state *state, enum dibx000_ad
// dprintk( "908: %x, 909: %x\n", reg_908, reg_909);
+ reg_909 |= (state->cfg.disable_sample_and_hold & 1) << 4;
reg_908 |= (state->cfg.enable_current_mirror & 1) << 7;
dib7000p_write_word(state, 908, reg_908);
@@ -780,7 +781,10 @@ static void dib7000p_set_channel(struct dib7000p_state *state, struct dvb_fronte
default:
case GUARD_INTERVAL_1_32: value *= 1; break;
}
- state->div_sync_wait = (value * 3) / 2 + 32; // add 50% SFN margin + compensate for one DVSY-fifo TODO
+ if (state->cfg.diversity_delay == 0)
+ state->div_sync_wait = (value * 3) / 2 + 48; // add 50% SFN margin + compensate for one DVSY-fifo
+ else
+ state->div_sync_wait = (value * 3) / 2 + state->cfg.diversity_delay; // add 50% SFN margin + compensate for one DVSY-fifo
/* deactive the possibility of diversity reception if extended interleaver */
state->div_force_off = !1 && ch->u.ofdm.transmission_mode != TRANSMISSION_MODE_8K;
diff --git a/drivers/media/dvb/frontends/dib7000p.h b/drivers/media/dvb/frontends/dib7000p.h
index 04a744938cc..da17345bf5b 100644
--- a/drivers/media/dvb/frontends/dib7000p.h
+++ b/drivers/media/dvb/frontends/dib7000p.h
@@ -33,8 +33,10 @@ struct dib7000p_config {
int (*agc_control) (struct dvb_frontend *, u8 before);
u8 output_mode;
+ u8 disable_sample_and_hold : 1;
u8 enable_current_mirror : 1;
+ u8 diversity_delay;
};