[alsa-devel] Applied "ASoC: Mediatek: MT8183: enable IIR filter" to the asoc tree

[Mark Brown]

The patch

   ASoC: Mediatek: MT8183: enable IIR filter

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.3

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 326b18176353d26df54dbc8b4b75ed4332898f61 Mon Sep 17 00:00:00 2001
From: Shunli Wang <shunli.wang at mediatek.com>
Date: Mon, 20 May 2019 16:24:20 +0800
Subject: [PATCH] ASoC: Mediatek: MT8183: enable IIR filter

IIR fileter can remove DC offset. It must be enabled when
dmic or amic connected to pmic is used.

Signed-off-by: Shunli Wang <shunli.wang at mediatek.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/mediatek/mt8183/mt8183-dai-adda.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/sound/soc/mediatek/mt8183/mt8183-dai-adda.c b/sound/soc/mediatek/mt8183/mt8183-dai-adda.c
index 017d7d1d9148..2b758a18c2ea 100644
--- a/sound/soc/mediatek/mt8183/mt8183-dai-adda.c
+++ b/sound/soc/mediatek/mt8183/mt8183-dai-adda.c
@@ -176,9 +176,6 @@ static int mtk_adda_ul_event(struct snd_soc_dapm_widget *w,
 	case SND_SOC_DAPM_POST_PMD:
 		/* should delayed 1/fs(smallest is 8k) = 125us before afe off */
 		usleep_range(125, 135);
-
-		/* reset dmic */
-		afe_priv->mtkaif_dmic = 0;
 		break;
 	default:
 		break;
@@ -426,6 +423,17 @@ static int mtk_dai_adda_hw_params(struct snd_pcm_substream *substream,
 
 		ul_src_con0 |= (voice_mode << 17) & (0x7 << 17);
 
+		/* enable iir */
+		ul_src_con0 |= (1 << UL_IIR_ON_TMP_CTL_SFT) &
+			       UL_IIR_ON_TMP_CTL_MASK_SFT;
+
+		/* 35Hz @ 48k */
+		regmap_write(afe->regmap, AFE_ADDA_IIR_COEF_02_01, 0x00000000);
+		regmap_write(afe->regmap, AFE_ADDA_IIR_COEF_04_03, 0x00003FB8);
+		regmap_write(afe->regmap, AFE_ADDA_IIR_COEF_06_05, 0x3FB80000);
+		regmap_write(afe->regmap, AFE_ADDA_IIR_COEF_08_07, 0x3FB80000);
+		regmap_write(afe->regmap, AFE_ADDA_IIR_COEF_10_09, 0x0000C048);
+
 		regmap_write(afe->regmap, AFE_ADDA_UL_SRC_CON0, ul_src_con0);
 
 		/* mtkaif_rxif_data_mode = 0, amic */
-- 
2.20.1