target/linux/sunxi/patches-4.1/166-asoc-sunxi-fix-distortion-on-16bit-mono.patch

   1 From f8517e7d836269f5fa1e1049394104417d3a7357 Mon Sep 17 00:00:00 2001
   2 From: "B.R. Oake" <broake@openmailbox.org>
   3 Date: Sat, 6 Sep 2014 14:58:50 +0000
   4 Subject: [PATCH] ASoC: sunxi-codec: Fix distortion on 16-bit mono
   5
   6 Patch to remove distortion on 16-bit mono, based on the linux-sunxi-3.4
   7 code.
   8
   9 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  10 ---
  11  sound/soc/sunxi/sunxi-codec.c | 4 +---
  12  1 file changed, 1 insertion(+), 3 deletions(-)
  13
  14 diff --git a/sound/soc/sunxi/sunxi-codec.c b/sound/soc/sunxi/sunxi-codec.c
  15 index 67f978e..77a191b 100644
  16 --- a/sound/soc/sunxi/sunxi-codec.c
  17 +++ b/sound/soc/sunxi/sunxi-codec.c
  18 @@ -215,9 +215,6 @@ static int sunxi_codec_prepare(struct snd_pcm_substream *substream,
  19                         regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 0x1 << SUNXI_DAC_FIFOC_FIR_VERSION, 0x1 << SUNXI_DAC_FIFOC_FIR_VERSION);
  20                 }
  21
  22 -               /* set TX FIFO MODE - 0 works for both 16 and 24 bits */
  23 -               regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 0x1 << SUNXI_DAC_FIFOC_TX_FIFO_MODE, 0x0 << SUNXI_DAC_FIFOC_TX_FIFO_MODE);
  24 -
  25                 /* send last sample when DAC FIFO under run */
  26                 regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 0x1 << SUNXI_DAC_FIFOC_SEND_LASAT, 0x0 << SUNXI_DAC_FIFOC_SEND_LASAT);
  27         } else {
  28 @@ -329,6 +326,7 @@ static int sunxi_codec_hw_params(struct snd_pcm_substream *substream,
  29                 regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 7 << SUNXI_DAC_FIFOC_DAC_FS, hwrate << SUNXI_DAC_FIFOC_DAC_FS);
  30                 regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 1 << SUNXI_DAC_FIFOC_MONO_EN, is_mono << SUNXI_DAC_FIFOC_MONO_EN);
  31                 regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 1 << SUNXI_DAC_FIFOC_TX_SAMPLE_BITS, is_24bit << SUNXI_DAC_FIFOC_TX_SAMPLE_BITS);
  32 +               regmap_update_bits(priv->regmap, SUNXI_DAC_FIFOC, 1 << SUNXI_DAC_FIFOC_TX_FIFO_MODE, !is_24bit << SUNXI_DAC_FIFOC_TX_FIFO_MODE);
  33                 if (is_24bit)
  34                         priv->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
  35                 else