From: Brad Love Date: Fri, 5 Jan 2018 01:30:24 +0000 (-0500) Subject: media: lgdt3306a: QAM streaming improvement X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=4c7c3f9b1a85d26ffd4a8a31dd661856c7482357;p=openwrt%2Fstaging%2Fblogic.git 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: Brad Love Reviewed-by: Michael Ira Krufky Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c index d2477edae197..377271decbab 100644 --- a/drivers/media/dvb-frontends/lgdt3306a.c +++ b/drivers/media/dvb-frontends/lgdt3306a.c @@ -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))