Commit 593cbf3d authored by Patrick Boettcher's avatar Patrick Boettcher Committed by Linus Torvalds
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[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: default avatarPatrick Boettcher <pb@linuxtv.org>
Signed-off-by: default avatarMichael Krufky <mkrufky@m1k.net>
Signed-off-by: default avatarJohannes Stezenbach <js@linuxtv.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c589ebfc

drivers/media/dvb/frontends/stv0297.c

+7 −1
Original line number Diff line number Diff line
@@ -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);