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Commit 4c7c3f9b authored by Brad Love's avatar Brad Love Committed by Mauro Carvalho Chehab
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media: lgdt3306a: QAM streaming improvement 



Add some register updates required for stable viewing
on Cablevision in NY. Does not adversely affect other providers.

Changes since v1:
- Change upper case hex to lower case.

Signed-off-by: default avatarBrad Love <brad@nextdimension.cc>
Reviewed-by: default avatarMichael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 5b3a8e90

drivers/media/dvb-frontends/lgdt3306a.c

+22 −0
Original line number Diff line number Diff line
@@ -598,6 +598,28 @@ static int lgdt3306a_set_qam(struct lgdt3306a_state *state, int modulation) 
	if (lg_chkerr(ret))

		goto fail;



	/* 5.1 V0.36 SRDCHKALWAYS : For better QAM detection */

	ret = lgdt3306a_read_reg(state, 0x000a, &val);

	val &= 0xfd;

	val |= 0x02;

	ret = lgdt3306a_write_reg(state, 0x000a, val);

	if (lg_chkerr(ret))

		goto fail;



	/* 5.2 V0.36 Control of "no signal" detector function */

	ret = lgdt3306a_read_reg(state, 0x2849, &val);

	val &= 0xdf;

	ret = lgdt3306a_write_reg(state, 0x2849, val);

	if (lg_chkerr(ret))

		goto fail;



	/* 5.3 Fix for Blonder Tongue HDE-2H-QAM and AQM modulators */

	ret = lgdt3306a_read_reg(state, 0x302b, &val);

	val &= 0x7f;  /* SELFSYNCFINDEN_CQS=0; disable auto reset */

	ret = lgdt3306a_write_reg(state, 0x302b, val);

	if (lg_chkerr(ret))

		goto fail;



	/* 6. Reset */

	ret = lgdt3306a_soft_reset(state);

	if (lg_chkerr(ret))