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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2016-09-27 08:25:29 +0900
committerMark Brown <broonie@kernel.org>2016-09-27 09:22:39 -0700
commitf2b2f6dcd48adf81007b66e39bb7ca21d9bde250 (patch)
tree70bcecf9271ac810fdfd59134bb0b62d80eff424 /sound/soc
parent29b4817d4018df78086157ea3a55c1d9424a7cfc (diff)
downloadlinux-f2b2f6dcd48adf81007b66e39bb7ca21d9bde250.tar.bz2
ASoC: stac9766: fix wrong usage of DECLARE_TLV_DB_LINEAR()
As long as reading datasheet of STAC9766/9767, this driver includes wrong usage of DECLARE_TLV_DB_LINEAR(). In "8.1.2. Master Volume Registers", attenuation of lineout volumes is represented in 5 bits by -1.5 dB/step from 0 to -46.5 dB. Thus, 'master_tlv' should be dB step representation. In "8.1.14. Record Gain", gain of volumes is represented in 4 bits by 1.5 dB/step from 0 to 22.5 dB. Thus, 'record_tlv' should be dB step representation. In "8.1.5. PC BEEP Volume", attenuation of volume is represented in 4 bits by -3 dB/step from 0 to 45 dB. Thus, 'beep_tlv' should be dB step representation. In "8.1.7. Stereo or Mic Volume" and so on, gain of volumes is represented in 5 bits by -1.5 dB from 12 to -34.5 dB. Thus, 'mix_tlv' should be dB step representation. Totally, current implementation includes misuse of TLV-related macro. This commit replaces usage of DECLARE_TLV_DB_LINEAR() with SNDRV_CTL_TLVD_DECLARE_DB_SCALE(), to give proper information to applications in user land. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/codecs/stac9766.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/sound/soc/codecs/stac9766.c b/sound/soc/codecs/stac9766.c
index 0945c51df003..a718c653dab3 100644
--- a/sound/soc/codecs/stac9766.c
+++ b/sound/soc/codecs/stac9766.c
@@ -85,10 +85,10 @@ static SOC_ENUM_SINGLE_DECL(stac9766_boost2_enum,
static SOC_ENUM_SINGLE_DECL(stac9766_stereo_mic_enum,
AC97_STAC_STEREO_MIC, 2, stac9766_stereo_mic);
-static const DECLARE_TLV_DB_LINEAR(master_tlv, -4600, 0);
-static const DECLARE_TLV_DB_LINEAR(record_tlv, 0, 2250);
-static const DECLARE_TLV_DB_LINEAR(beep_tlv, -4500, 0);
-static const DECLARE_TLV_DB_LINEAR(mix_tlv, -3450, 1200);
+static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(master_tlv, -4650, 150, 0);
+static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(record_tlv, 0, 150, 0);
+static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(beep_tlv, -4500, 300, 0);
+static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(mix_tlv, -3450, 150, 0);
static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
SOC_DOUBLE_TLV("Speaker Volume", AC97_MASTER, 8, 0, 31, 1, master_tlv),