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authorRyder Lee <ryder.lee@mediatek.com>2018-04-25 06:19:55 +0200
committerMark Brown <broonie@kernel.org>2018-04-26 16:08:43 +0200
commitcf8702736032cd593f481e4c2ac38cfe6fa67799 (patch)
tree645ad19dd7bf4a73215f81002fba98edc5d8390f /sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
parentASoC: add mt6351 codec driver (diff)
downloadlinux-cf8702736032cd593f481e4c2ac38cfe6fa67799.tar.xz
linux-cf8702736032cd593f481e4c2ac38cfe6fa67799.zip
ASoC: mediatek: simplify the control logic of MT2701 I2S
This patch adjusts the mt2701_afe_i2s_ops to simplify the control logic of the I2S path. Signed-off-by: Ryder Lee <ryder.lee@mediatek.com> Reviewed-by: Garlic Tseng <garlic.tseng@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/mediatek/mt2701/mt2701-afe-pcm.c')
-rw-r--r--sound/soc/mediatek/mt2701/mt2701-afe-pcm.c114
1 files changed, 35 insertions, 79 deletions
diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
index 8219f5534150..2a161f4d01f6 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
@@ -3,7 +3,8 @@
*
* Copyright (c) 2016 MediaTek Inc.
* Author: Garlic Tseng <garlic.tseng@mediatek.com>
- * Ir Lian <ir.lian@mediatek.com>
+ * Ir Lian <ir.lian@mediatek.com>
+ * Ryder Lee <ryder.lee@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -101,31 +102,15 @@ static int mt2701_afe_i2s_startup(struct snd_pcm_substream *substream,
return mt2701_afe_enable_mclk(afe, i2s_num);
}
-static int mt2701_afe_i2s_path_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai,
- int i2s_num,
- int dir_invert)
+static int mt2701_afe_i2s_path_disable(struct mtk_base_afe *afe,
+ struct mt2701_i2s_path *i2s_path,
+ int stream_dir)
{
- struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
- struct mt2701_afe_private *afe_priv = afe->platform_priv;
- struct mt2701_i2s_path *i2s_path = &afe_priv->i2s_path[i2s_num];
- const struct mt2701_i2s_data *i2s_data;
- int stream_dir = substream->stream;
-
- if (dir_invert) {
- if (stream_dir == SNDRV_PCM_STREAM_PLAYBACK)
- stream_dir = SNDRV_PCM_STREAM_CAPTURE;
- else
- stream_dir = SNDRV_PCM_STREAM_PLAYBACK;
- }
- i2s_data = i2s_path->i2s_data[stream_dir];
+ const struct mt2701_i2s_data *i2s_data = i2s_path->i2s_data[stream_dir];
- i2s_path->on[stream_dir]--;
- if (i2s_path->on[stream_dir] < 0) {
- dev_warn(afe->dev, "i2s_path->on: %d, dir: %d\n",
- i2s_path->on[stream_dir], stream_dir);
+ if (--i2s_path->on[stream_dir] < 0)
i2s_path->on[stream_dir] = 0;
- }
+
if (i2s_path->on[stream_dir])
return 0;
@@ -133,7 +118,7 @@ static int mt2701_afe_i2s_path_shutdown(struct snd_pcm_substream *substream,
regmap_update_bits(afe->regmap, i2s_data->i2s_ctrl_reg,
ASYS_I2S_CON_I2S_EN, 0);
- mt2701_afe_disable_i2s(afe, i2s_num, stream_dir);
+ mt2701_afe_disable_i2s(afe, i2s_path, stream_dir);
return 0;
}
@@ -154,48 +139,32 @@ static void mt2701_afe_i2s_shutdown(struct snd_pcm_substream *substream,
if (i2s_path->occupied[substream->stream])
i2s_path->occupied[substream->stream] = 0;
else
- goto I2S_UNSTART;
+ goto exit;
- mt2701_afe_i2s_path_shutdown(substream, dai, i2s_num, 0);
+ mt2701_afe_i2s_path_disable(afe, i2s_path, substream->stream);
/* need to disable i2s-out path when disable i2s-in */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- mt2701_afe_i2s_path_shutdown(substream, dai, i2s_num, 1);
+ mt2701_afe_i2s_path_disable(afe, i2s_path, !substream->stream);
-I2S_UNSTART:
+exit:
/* disable mclk */
mt2701_afe_disable_mclk(afe, i2s_num);
}
-static int mt2701_i2s_path_prepare_enable(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai,
- int i2s_num,
- int dir_invert)
+static int mt2701_i2s_path_enable(struct mtk_base_afe *afe,
+ struct mt2701_i2s_path *i2s_path,
+ int stream_dir, int rate)
{
- struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
- struct mt2701_afe_private *afe_priv = afe->platform_priv;
- struct mt2701_i2s_path *i2s_path = &afe_priv->i2s_path[i2s_num];
- const struct mt2701_i2s_data *i2s_data;
- struct snd_pcm_runtime * const runtime = substream->runtime;
+ const struct mt2701_i2s_data *i2s_data = i2s_path->i2s_data[stream_dir];
int reg, fs, w_len = 1; /* now we support bck 64bits only */
- int stream_dir = substream->stream;
unsigned int mask, val;
- if (dir_invert) {
- if (stream_dir == SNDRV_PCM_STREAM_PLAYBACK)
- stream_dir = SNDRV_PCM_STREAM_CAPTURE;
- else
- stream_dir = SNDRV_PCM_STREAM_PLAYBACK;
- }
- i2s_data = i2s_path->i2s_data[stream_dir];
-
/* no need to enable if already done */
- i2s_path->on[stream_dir]++;
-
- if (i2s_path->on[stream_dir] != 1)
+ if (++i2s_path->on[stream_dir] != 1)
return 0;
- fs = mt2701_afe_i2s_fs(runtime->rate);
+ fs = mt2701_afe_i2s_fs(rate);
mask = ASYS_I2S_CON_FS |
ASYS_I2S_CON_I2S_COUPLE_MODE | /* 0 */
@@ -209,22 +178,20 @@ static int mt2701_i2s_path_prepare_enable(struct snd_pcm_substream *substream,
if (stream_dir == SNDRV_PCM_STREAM_CAPTURE) {
mask |= ASYS_I2S_IN_PHASE_FIX;
val |= ASYS_I2S_IN_PHASE_FIX;
+ reg = ASMI_TIMING_CON1;
+ } else {
+ reg = ASMO_TIMING_CON1;
}
regmap_update_bits(afe->regmap, i2s_data->i2s_ctrl_reg, mask, val);
- if (stream_dir == SNDRV_PCM_STREAM_PLAYBACK)
- reg = ASMO_TIMING_CON1;
- else
- reg = ASMI_TIMING_CON1;
-
regmap_update_bits(afe->regmap, reg,
i2s_data->i2s_asrc_fs_mask
<< i2s_data->i2s_asrc_fs_shift,
fs << i2s_data->i2s_asrc_fs_shift);
/* enable i2s */
- mt2701_afe_enable_i2s(afe, i2s_num, stream_dir);
+ mt2701_afe_enable_i2s(afe, i2s_path, stream_dir);
/* reset i2s hw status before enable */
regmap_update_bits(afe->regmap, i2s_data->i2s_ctrl_reg,
@@ -241,43 +208,32 @@ static int mt2701_i2s_path_prepare_enable(struct snd_pcm_substream *substream,
static int mt2701_afe_i2s_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- int clk_domain;
struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
struct mt2701_afe_private *afe_priv = afe->platform_priv;
- int i2s_num = mt2701_dai_num_to_i2s(afe, dai->id);
+ int ret, i2s_num = mt2701_dai_num_to_i2s(afe, dai->id);
struct mt2701_i2s_path *i2s_path;
- int mclk_rate;
if (i2s_num < 0)
return i2s_num;
i2s_path = &afe_priv->i2s_path[i2s_num];
- mclk_rate = i2s_path->mclk_rate;
if (i2s_path->occupied[substream->stream])
return -EBUSY;
+
+ ret = mt2701_mclk_configuration(afe, i2s_num);
+ if (ret)
+ return ret;
+
i2s_path->occupied[substream->stream] = 1;
- if (MT2701_PLL_DOMAIN_0_RATE % mclk_rate == 0) {
- clk_domain = 0;
- } else if (MT2701_PLL_DOMAIN_1_RATE % mclk_rate == 0) {
- clk_domain = 1;
- } else {
- dev_err(dai->dev, "%s() bad mclk rate %d\n",
- __func__, mclk_rate);
- return -EINVAL;
- }
- mt2701_mclk_configuration(afe, i2s_num, clk_domain, mclk_rate);
+ /* need to enable i2s-out path when enable i2s-in */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ mt2701_i2s_path_enable(afe, i2s_path, !substream->stream,
+ substream->runtime->rate);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- mt2701_i2s_path_prepare_enable(substream, dai, i2s_num, 0);
- } else {
- /* need to enable i2s-out path when enable i2s-in */
- /* prepare for another direction "out" */
- mt2701_i2s_path_prepare_enable(substream, dai, i2s_num, 1);
- /* prepare for "in" */
- mt2701_i2s_path_prepare_enable(substream, dai, i2s_num, 0);
- }
+ mt2701_i2s_path_enable(afe, i2s_path, substream->stream,
+ substream->runtime->rate);
return 0;
}