From: Daniel Mack Date: Thu, 29 Oct 2009 01:24:32 +0000 (+0100) Subject: ASoC: CS4270: export de-emphasis filter as ALSA control X-Git-Tag: firefly_0821_release~9833^2~3479^2~77 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7e1aa1dcd0d886df72586e3a94b1a7382952f21f;p=firefly-linux-kernel-4.4.55.git ASoC: CS4270: export de-emphasis filter as ALSA control The CS4270 codec features an de-emphasis filter for compensation of audio material filtered by an 50/15 uS algorithm. Not sure whether we should always enable it for 44100Hz sampling frequency, but it should at least be configurable by the user. Signed-off-by: Daniel Mack Acked-by: Timur Tabi Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c index 59bb16d033d6..565842dcfc65 100644 --- a/sound/soc/codecs/cs4270.c +++ b/sound/soc/codecs/cs4270.c @@ -520,6 +520,7 @@ static const struct snd_kcontrol_new cs4270_snd_controls[] = { SOC_SINGLE("Digital Sidetone Switch", CS4270_FORMAT, 5, 1, 0), SOC_SINGLE("Soft Ramp Switch", CS4270_TRANS, 6, 1, 0), SOC_SINGLE("Zero Cross Switch", CS4270_TRANS, 5, 1, 0), + SOC_SINGLE("De-emphasis filter", CS4270_TRANS, 0, 1, 0), SOC_SINGLE("Popguard Switch", CS4270_MODE, 0, 1, 1), SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0), SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1),