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V4L/DVB (9470): Disable PLL Loop while tuning

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Signed-off-by: Ales Jurik <ajurik@quick.cz>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Ales Jurik 2008-10-26 18:45:59 -03:00 committed by Mauro Carvalho Chehab
parent 3f4009255b
commit 20dafb3b06
1 changed files with 11 additions and 1 deletions
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12
drivers/media/dvb/frontends/stb6100.c
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@ -320,6 +320,13 @@ static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
}
srate = p.u.qpsk.symbol_rate;
regs[STB6100_DLB] = 0xdc;
/* Disable LPEN */
regs[STB6100_LPEN] &= ~STB6100_LPEN_LPEN; /* PLL Loop disabled */
if ((rc = stb6100_write_regs(state, regs)) < 0)
return rc;
/* Baseband gain. */
if (srate >= 15000000)
g = 9; // +4 dB
@ -376,9 +383,11 @@ static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
/* Power up. */
regs[STB6100_LPEN] |= STB6100_LPEN_SYNP | STB6100_LPEN_OSCP | STB6100_LPEN_BEN;
msleep(2);
if ((rc = stb6100_write_regs(state, regs)) < 0)
return rc;
msleep(2);
regs[STB6100_LPEN] |= STB6100_LPEN_LPEN; /* PLL loop enabled */
if ((rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN])) < 0)
return rc;
@ -393,7 +402,8 @@ static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
if ((rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO])) < 0)
return rc;
regs[STB6100_FCCK] &= ~STB6100_FCCK_FCCK; /* LPF BW clock disabled */
if ((rc = stb6100_write_reg(state, STB6100_FCCK, regs[STB6100_FCCK])) < 0)
stb6100_normalise_regs(regs);
if ((rc = stb6100_write_reg_range(state, &regs[1], 1, STB6100_NUMREGS - 3)) < 0)
return rc;
msleep(30);