From: Patrick Boettcher Date: Fri, 9 Sep 2005 20:02:38 +0000 (-0700) Subject: [PATCH] dvb: frontend: stv0297: QAM128 tuning improvement X-Git-Tag: firefly_0821_release~41572 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=593cbf3dcbffc852cf91a30951eb518b59bf7322;p=firefly-linux-kernel-4.4.55.git [PATCH] dvb: frontend: stv0297: QAM128 tuning improvement 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 Signed-off-by: Michael Krufky Signed-off-by: Johannes Stezenbach Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/media/dvb/frontends/stv0297.c b/drivers/media/dvb/frontends/stv0297.c index 928aca052afe..01eb41990e8a 100644 --- a/drivers/media/dvb/frontends/stv0297.c +++ b/drivers/media/dvb/frontends/stv0297.c @@ -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 */ - stv0297_writereg_mask(state, 0x88, 0x08, 0x08); + /* 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);