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ASoC: tegra-alt: expose i2s fifo threshold control

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For some of the use cases we might require to program the fifo
thresholds of Rx cif. Until now we have been using fixed
values for Rx cif. This patch exports the configurability
option to the user space. If no threshold value is specified,
it uses the fixed values as per the previous state of the driver.
Threshold needs to be programmed in terms of frames, where
1 frame = no. of channels * 1 word.

Note: The same control for Tx cif is not needed as this register
is RO and not allowed to be programmed. Reset value is used for
Tx cif.

Bug 200283222

Change-Id: If1e5379dd874a0f1f6f1d9ae71465ac8c1f9f071
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-on: http://git-master/r/1319742
Reviewed-by: Mohan Kumar D <mkumard@nvidia.com>
Reviewed-by: Dipesh Gandhi <dipeshg@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Sameer Pujar
2017-03-13 13:14:14 +05:30
parent 8f4d31deb6
commit 5c3be8602c
1 changed files with 39 additions and 17 deletions
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56
sound/soc/tegra-alt/tegra210_i2s_alt.c
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@@ -1,7 +1,7 @@
/*
* tegra210_i2s.c - Tegra210 I2S driver
*
* Copyright (c) 2014-2016 NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2014-2017 NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -441,6 +441,8 @@ static int tegra210_i2s_get_format(struct snd_kcontrol *kcontrol,
else if (strstr(kcontrol->id.name, "TX mono to stereo"))
ucontrol->value.integer.value[0] =
i2s->mono_to_stereo[I2S_TX_PATH];
else if (strstr(kcontrol->id.name, "Rx fifo threshold"))
ucontrol->value.integer.value[0] = i2s->rx_fifo_th;
return 0;
}
@@ -450,28 +452,31 @@ static int tegra210_i2s_put_format(struct snd_kcontrol *kcontrol,
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
int value = ucontrol->value.integer.value[0];
/* set the format control flag */
if (strstr(kcontrol->id.name, "input"))
i2s->format_in = ucontrol->value.integer.value[0];
i2s->format_in = value;
else if (strstr(kcontrol->id.name, "codec"))
i2s->codec_bit_format = ucontrol->value.integer.value[0];
i2s->codec_bit_format = value;
else if (strstr(kcontrol->id.name, "Sample Rate"))
i2s->sample_rate_via_control = ucontrol->value.integer.value[0];
i2s->sample_rate_via_control = value;
else if (strstr(kcontrol->id.name, "Channels"))
i2s->channels_via_control = ucontrol->value.integer.value[0];
i2s->channels_via_control = value;
else if (strstr(kcontrol->id.name, "RX stereo to mono"))
i2s->stereo_to_mono[I2S_RX_PATH] =
ucontrol->value.integer.value[0];
i2s->stereo_to_mono[I2S_RX_PATH] = value;
else if (strstr(kcontrol->id.name, "RX mono to stereo"))
i2s->mono_to_stereo[I2S_RX_PATH] =
ucontrol->value.integer.value[0];
i2s->mono_to_stereo[I2S_RX_PATH] = value;
else if (strstr(kcontrol->id.name, "TX stereo to mono"))
i2s->stereo_to_mono[I2S_TX_PATH] =
ucontrol->value.integer.value[0];
i2s->stereo_to_mono[I2S_TX_PATH] = value;
else if (strstr(kcontrol->id.name, "TX mono to stereo"))
i2s->mono_to_stereo[I2S_TX_PATH] =
ucontrol->value.integer.value[0];
i2s->mono_to_stereo[I2S_TX_PATH] = value;
else if (strstr(kcontrol->id.name, "Rx fifo threshold")) {
if (value >= 0 && value < TEGRA210_I2S_RX_FIFO_DEPTH)
i2s->rx_fifo_th = value;
else
return -EINVAL;
}
return 0;
}
@@ -506,7 +511,7 @@ static int tegra210_i2s_hw_params(struct snd_pcm_substream *substream,
struct device *dev = dai->dev;
struct tegra210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
unsigned int mask, val, reg, frame_format;
int ret, sample_size, channels, srate, i2sclock, bitcnt;
int ret, sample_size, channels, srate, i2sclock, bitcnt, max_th;
struct tegra210_xbar_cif_conf cif_conf;
memset(&cif_conf, 0, sizeof(struct tegra210_xbar_cif_conf));
@@ -571,12 +576,9 @@ static int tegra210_i2s_hw_params(struct snd_pcm_substream *substream,
if (frame_format == TEGRA210_I2S_CTRL_FRAME_FORMAT_FSYNC_MODE) {
i2s->soc_data->set_slot_ctrl(i2s->regmap, channels,
i2s->tx_mask, i2s->rx_mask);
/* FIXUP : I2S fifo threshold set to 3 when AFC is connected */
cif_conf.threshold = 3;
cif_conf.audio_channels = channels;
cif_conf.client_channels = channels;
} else {
cif_conf.threshold = 3;
cif_conf.audio_channels = channels;
cif_conf.client_channels = (channels == 1) ? 2 : channels;
}
@@ -625,6 +627,14 @@ static int tegra210_i2s_hw_params(struct snd_pcm_substream *substream,
cif_conf.stereo_conv =
i2s->stereo_to_mono[I2S_RX_PATH] - 1;
}
/* RX FIFO threshold interms of frames */
max_th = (TEGRA210_I2S_RX_FIFO_DEPTH / channels) - 1;
if (i2s->rx_fifo_th > max_th) { /* error handling */
cif_conf.threshold = max_th;
i2s->rx_fifo_th = max_th;
} else
cif_conf.threshold = i2s->rx_fifo_th;
} else {
if (i2s->mono_to_stereo[I2S_TX_PATH] > 0) {
cif_conf.audio_channels = 2;
@@ -657,6 +667,8 @@ static int tegra210_i2s_codec_probe(struct snd_soc_codec *codec)
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
codec->control_data = i2s->regmap;
/* default threshold settings */
i2s->rx_fifo_th = 3;
return 0;
}
@@ -794,6 +806,13 @@ static const struct soc_enum tegra210_i2s_stereo_conv_enum =
ARRAY_SIZE(tegra210_i2s_stereo_conv_text),
tegra210_i2s_stereo_conv_text);
#define NV_SOC_SINGLE_RANGE_EXT(xname, xmin, xmax, xget, xput) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
.info = snd_soc_info_xr_sx, .get = xget, .put = xput, \
.private_value = (unsigned long)&(struct soc_mixer_control) \
{.invert = 0, .min = xmin, .max = xmax, \
.platform_max = xmax}}
static const struct snd_kcontrol_new tegra210_i2s_controls[] = {
SOC_SINGLE_EXT("Loopback", SND_SOC_NOPM, 0, 1, 0,
tegra210_i2s_loopback_get, tegra210_i2s_loopback_put),
@@ -813,6 +832,9 @@ static const struct snd_kcontrol_new tegra210_i2s_controls[] = {
tegra210_i2s_get_format, tegra210_i2s_put_format),
SOC_ENUM_EXT("TX mono to stereo conv", tegra210_i2s_mono_conv_enum,
tegra210_i2s_get_format, tegra210_i2s_put_format),
NV_SOC_SINGLE_RANGE_EXT("Rx fifo threshold", 0,
TEGRA210_I2S_RX_FIFO_DEPTH - 1, tegra210_i2s_get_format,
tegra210_i2s_put_format),
};
static const struct snd_soc_dapm_widget tegra210_i2s_widgets[] = {