From b91a7cb026124951a34e41f8481f1a4fb754983e Mon Sep 17 00:00:00 2001
From: Manu Abraham <abraham.manu@gmail.com>
Date: Tue, 4 Mar 2008 19:19:58 -0300
Subject: [PATCH] V4L/DVB (9462): Allow specifying clock per device
Optimizations galore: Blistering barnacles! The KNC1 and friends
like 90 Mhz clock much better rather than running at a higher
throttle, for almost similar hardware. he exact cause unknown,
possibly due to a lower voltage applied for the demod power supply.
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/dvb/frontends/stb0899_drv.c | 5 +++--
drivers/media/dvb/frontends/stb0899_drv.h | 2 ++
drivers/media/dvb/ttpci/budget-av.c | 3 +++
drivers/media/dvb/ttpci/budget-ci.c | 3 +++
4 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/media/dvb/frontends/stb0899_drv.c b/drivers/media/dvb/frontends/stb0899_drv.c
index deeec34fc47a..38d9fa9c0ac1 100644
--- a/drivers/media/dvb/frontends/stb0899_drv.c
+++ b/drivers/media/dvb/frontends/stb0899_drv.c
@@ -1534,6 +1534,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
struct stb0899_state *state = fe->demodulator_priv;
struct stb0899_params *i_params = &state->params;
struct stb0899_internal *internal = &state->internal;
+ struct stb0899_config *config = state->config;
u32 SearchRange, gain;
@@ -1575,9 +1576,9 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
}
if (i_params->srate <= 5000000)
- stb0899_set_mclk(state, 76500000);
+ stb0899_set_mclk(state, config->lo_clk);
else
- stb0899_set_mclk(state, 99000000);
+ stb0899_set_mclk(state, config->hi_clk);
switch (state->delsys) {
case DVBFE_DELSYS_DVBS:
diff --git a/drivers/media/dvb/frontends/stb0899_drv.h b/drivers/media/dvb/frontends/stb0899_drv.h
index 45136d9aaeb7..98b200ce0c34 100644
--- a/drivers/media/dvb/frontends/stb0899_drv.h
+++ b/drivers/media/dvb/frontends/stb0899_drv.h
@@ -117,6 +117,8 @@ struct stb0899_config {
u8 out_rate_comp;
u8 i2c_repeater;
// int inversion;
+ int lo_clk;
+ int hi_clk;
u32 esno_ave;
u32 esno_quant;
diff --git a/drivers/media/dvb/ttpci/budget-av.c b/drivers/media/dvb/ttpci/budget-av.c
index 24123715f197..f996cef79ec1 100644
--- a/drivers/media/dvb/ttpci/budget-av.c
+++ b/drivers/media/dvb/ttpci/budget-av.c
@@ -1127,6 +1127,9 @@ static struct stb0899_config knc1_dvbs2_config = {
.xtal_freq = 27000000,
.inversion = IQ_SWAP_OFF, /* 1 */
+ .lo_clk = 76500000,
+ .hi_clk = 90000000,
+
.esno_ave = STB0899_DVBS2_ESNO_AVE,
.esno_quant = STB0899_DVBS2_ESNO_QUANT,
.avframes_coarse = STB0899_DVBS2_AVFRAMES_COARSE,
diff --git a/drivers/media/dvb/ttpci/budget-ci.c b/drivers/media/dvb/ttpci/budget-ci.c
index ebe8210b123d..497f584e1bd6 100644
--- a/drivers/media/dvb/ttpci/budget-ci.c
+++ b/drivers/media/dvb/ttpci/budget-ci.c
@@ -1312,6 +1312,9 @@ static struct stb0899_config tt3200_config = {
.xtal_freq = 27000000,
.inversion = IQ_SWAP_ON, /* 1 */
+ .lo_clk = 76500000,
+ .hi_clk = 99000000,
+
.esno_ave = STB0899_DVBS2_ESNO_AVE,
.esno_quant = STB0899_DVBS2_ESNO_QUANT,
.avframes_coarse = STB0899_DVBS2_AVFRAMES_COARSE,
--
2.34.1