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[PATCH] dvb: frontend: stv0297: QAM128 tuning improvement

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while investigating the QAM_128-issue with the stv0297-driver for the
Cablestar (which is not the same as the one in dvb-kernel CVS, yet), I fixed
it, not by increasing the timeout, but by disabling the corner-detection for
QAM_128 and higher.

This patch has been tested on dvb-kernel cvs, and has been reported to work by
multiple users.  Some cards still need timeout increase on top of this patch.
This will be addressed later.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Patrick Boettcher 2005-09-09 13:02:38 -07:00 committed by Linus Torvalds
parent c589ebfce7
commit 593cbf3dcb
1 changed files with 7 additions and 1 deletions
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6
drivers/media/dvb/frontends/stv0297.c
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@ -606,7 +606,13 @@ static int stv0297_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
stv0297_set_inversion(state, inversion);
/* kick off lock */
/* Disable corner detection for higher QAMs */
if (p->u.qam.modulation == QAM_128 ||
p->u.qam.modulation == QAM_256)
stv0297_writereg_mask(state, 0x88, 0x08, 0x00);
else
stv0297_writereg_mask(state, 0x88, 0x08, 0x08);
stv0297_writereg_mask(state, 0x5a, 0x20, 0x00);
stv0297_writereg_mask(state, 0x6a, 0x01, 0x01);
stv0297_writereg_mask(state, 0x43, 0x40, 0x40);