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Message-Id: <20200306130147.27452-1-srinivas.kandagatla@linaro.org>
Date: Fri, 6 Mar 2020 13:01:47 +0000
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: broonie@...nel.org
Cc: alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
Takahide Higuchi <takahidehiguchi@...il.com>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH] ASoC: qcom: lpass-cpu: support full duplex operation
From: Takahide Higuchi <takahidehiguchi@...il.com>
This patch fixes a bug where playback on bidirectional I2S interface stops
when we start recording on the same interface.
We use regmap_update_bits instead of regmap_write so that we will not clear
SPKEN and SPKMODE bits when we start/stop recording.
Signed-off-by: Takahide Higuchi <takahidehiguchi@...il.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
sound/soc/qcom/lpass-apq8016.c | 2 ++
sound/soc/qcom/lpass-cpu.c | 24 ++++++++++++++++++------
sound/soc/qcom/lpass-lpaif-reg.h | 2 +-
3 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/sound/soc/qcom/lpass-apq8016.c b/sound/soc/qcom/lpass-apq8016.c
index 6575da549237..85079c697faa 100644
--- a/sound/soc/qcom/lpass-apq8016.c
+++ b/sound/soc/qcom/lpass-apq8016.c
@@ -121,6 +121,8 @@ static struct snd_soc_dai_driver apq8016_lpass_cpu_dai_driver[] = {
},
.probe = &asoc_qcom_lpass_cpu_dai_probe,
.ops = &asoc_qcom_lpass_cpu_dai_ops,
+ .symmetric_samplebits = 1,
+ .symmetric_rates = 1,
},
};
diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index dbce7e92baf3..dc8acb380b6f 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -72,6 +72,7 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
snd_pcm_format_t format = params_format(params);
unsigned int channels = params_channels(params);
unsigned int rate = params_rate(params);
+ unsigned int mask;
unsigned int regval;
int bitwidth, ret;
@@ -81,6 +82,9 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
return bitwidth;
}
+ mask = LPAIF_I2SCTL_LOOPBACK_MASK |
+ LPAIF_I2SCTL_WSSRC_MASK |
+ LPAIF_I2SCTL_BITWIDTH_MASK;
regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
LPAIF_I2SCTL_WSSRC_INTERNAL;
@@ -100,6 +104,7 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ mask |= LPAIF_I2SCTL_SPKMODE_MASK | LPAIF_I2SCTL_SPKMONO_MASK;
switch (channels) {
case 1:
regval |= LPAIF_I2SCTL_SPKMODE_SD0;
@@ -127,6 +132,7 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
} else {
+ mask |= LPAIF_I2SCTL_MICMODE_MASK | LPAIF_I2SCTL_MICMONO_MASK;
switch (channels) {
case 1:
regval |= LPAIF_I2SCTL_MICMODE_SD0;
@@ -155,9 +161,9 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
}
}
- ret = regmap_write(drvdata->lpaif_map,
- LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
- regval);
+ ret = regmap_update_bits(drvdata->lpaif_map,
+ LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
+ mask, regval);
if (ret) {
dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
return ret;
@@ -178,11 +184,17 @@ static int lpass_cpu_daiops_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+ unsigned int mask;
int ret;
- ret = regmap_write(drvdata->lpaif_map,
- LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
- 0);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ mask = LPAIF_I2SCTL_SPKMODE_MASK;
+ else
+ mask = LPAIF_I2SCTL_MICMODE_MASK;
+
+ ret = regmap_update_bits(drvdata->lpaif_map,
+ LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
+ mask, 0);
if (ret)
dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
diff --git a/sound/soc/qcom/lpass-lpaif-reg.h b/sound/soc/qcom/lpass-lpaif-reg.h
index 3d74ae123e9d..7a2b9cf99976 100644
--- a/sound/soc/qcom/lpass-lpaif-reg.h
+++ b/sound/soc/qcom/lpass-lpaif-reg.h
@@ -56,7 +56,7 @@
#define LPAIF_I2SCTL_MICMODE_6CH (7 << LPAIF_I2SCTL_MICMODE_SHIFT)
#define LPAIF_I2SCTL_MICMODE_8CH (8 << LPAIF_I2SCTL_MICMODE_SHIFT)
-#define LPAIF_I2SCTL_MIMONO_MASK GENMASK(3, 3)
+#define LPAIF_I2SCTL_MICMONO_MASK GENMASK(3, 3)
#define LPAIF_I2SCTL_MICMONO_SHIFT 3
#define LPAIF_I2SCTL_MICMONO_STEREO (0 << LPAIF_I2SCTL_MICMONO_SHIFT)
#define LPAIF_I2SCTL_MICMONO_MONO (1 << LPAIF_I2SCTL_MICMONO_SHIFT)
--
2.21.0
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