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linux-stable/sound/soc/qcom/lpass-hdmi.c
Pierre-Louis Bossart 8106efdce0
ASoC: qcom: lpass-hdmi: remove useless return 
cppcheck warning:

sound/soc/qcom/lpass-hdmi.c:189:9: warning: Identical condition and
return expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
 return ret;
        ^
sound/soc/qcom/lpass-hdmi.c:186:6: note: If condition 'ret' is true,
the function will return/exit
 if (ret)
     ^
sound/soc/qcom/lpass-hdmi.c:189:9: note: Returning identical
expression 'ret'
 return ret;
        ^
sound/soc/qcom/lpass-hdmi.c:206:9: warning: Identical condition and
return expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
 return ret;
        ^
sound/soc/qcom/lpass-hdmi.c:203:6: note: If condition 'ret' is true,
the function will return/exit
 if (ret)
     ^
sound/soc/qcom/lpass-hdmi.c:206:9: note: Returning identical
expression 'ret'
 return ret;
        ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210218222916.89809-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-03-10 13:01:49 +00:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
*
* lpass-hdmi.c -- ALSA SoC HDMI-CPU DAI driver for QTi LPASS HDMI
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <sound/pcm_params.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <dt-bindings/sound/sc7180-lpass.h>
#include "lpass-lpaif-reg.h"
#include "lpass.h"
static int lpass_hdmi_daiops_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
snd_pcm_format_t format = params_format(params);
unsigned int rate = params_rate(params);
unsigned int channels = params_channels(params);
unsigned int ret;
int bitwidth;
unsigned int word_length;
unsigned int ch_sts_buf0;
unsigned int ch_sts_buf1;
unsigned int data_format;
unsigned int sampling_freq;
unsigned int ch = 0;
struct lpass_dp_metadata_ctl *meta_ctl = drvdata->meta_ctl;
struct lpass_sstream_ctl *sstream_ctl = drvdata->sstream_ctl;
bitwidth = snd_pcm_format_width(format);
if (bitwidth < 0) {
dev_err(dai->dev, "%s invalid bit width given : %d\n",
__func__, bitwidth);
return bitwidth;
}
switch (bitwidth) {
case 16:
word_length = LPASS_DP_AUDIO_BITWIDTH16;
break;
case 24:
word_length = LPASS_DP_AUDIO_BITWIDTH24;
break;
default:
dev_err(dai->dev, "%s invalid bit width given : %d\n",
__func__, bitwidth);
return -EINVAL;
}
switch (rate) {
case 32000:
sampling_freq = LPASS_SAMPLING_FREQ32;
break;
case 44100:
sampling_freq = LPASS_SAMPLING_FREQ44;
break;
case 48000:
sampling_freq = LPASS_SAMPLING_FREQ48;
break;
default:
dev_err(dai->dev, "%s invalid bit width given : %d\n",
__func__, bitwidth);
return -EINVAL;
}
data_format = LPASS_DATA_FORMAT_LINEAR;
ch_sts_buf0 = (((data_format << LPASS_DATA_FORMAT_SHIFT) & LPASS_DATA_FORMAT_MASK)
| ((sampling_freq << LPASS_FREQ_BIT_SHIFT) & LPASS_FREQ_BIT_MASK));
ch_sts_buf1 = (word_length) & LPASS_WORDLENGTH_MASK;
ret = regmap_field_write(drvdata->tx_ctl->soft_reset, LPASS_TX_CTL_RESET);
if (ret)
return ret;
ret = regmap_field_write(drvdata->tx_ctl->soft_reset, LPASS_TX_CTL_CLEAR);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmitx_legacy_en, LPASS_HDMITX_LEGACY_DISABLE);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmitx_parity_calc_en, HDMITX_PARITY_CALC_EN);
if (ret)
return ret;
ret = regmap_field_write(drvdata->vbit_ctl->replace_vbit, REPLACE_VBIT);
if (ret)
return ret;
ret = regmap_field_write(drvdata->vbit_ctl->vbit_stream, LINEAR_PCM_DATA);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmitx_ch_msb[0], ch_sts_buf1);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmitx_ch_lsb[0], ch_sts_buf0);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmi_tx_dmactl[0]->use_hw_chs, HW_MODE);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmi_tx_dmactl[0]->hw_chs_sel, SW_MODE);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmi_tx_dmactl[0]->use_hw_usr, HW_MODE);
if (ret)
return ret;
ret = regmap_field_write(drvdata->hdmi_tx_dmactl[0]->hw_usr_sel, SW_MODE);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->mute, LPASS_MUTE_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->as_sdp_cc, channels - 1);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->as_sdp_ct, LPASS_META_DEFAULT_VAL);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->aif_db4, LPASS_META_DEFAULT_VAL);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->frequency, sampling_freq);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->mst_index, LPASS_META_DEFAULT_VAL);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->dptx_index, LPASS_META_DEFAULT_VAL);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->sstream_en, LPASS_SSTREAM_DISABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->dma_sel, ch);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->auto_bbit_en, LPASS_SSTREAM_DEFAULT_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->layout, LPASS_SSTREAM_DEFAULT_DISABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->layout_sp, LPASS_LAYOUT_SP_DEFAULT);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->dp_audio, LPASS_SSTREAM_DEFAULT_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->set_sp_on_en, LPASS_SSTREAM_DEFAULT_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->dp_sp_b_hw_en, LPASS_SSTREAM_DEFAULT_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->dp_staffing_en, LPASS_SSTREAM_DEFAULT_ENABLE);
return ret;
}
static int lpass_hdmi_daiops_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
int ret;
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
ret = regmap_field_write(drvdata->sstream_ctl->sstream_en, LPASS_SSTREAM_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(drvdata->meta_ctl->mute, LPASS_MUTE_DISABLE);
return ret;
}
static int lpass_hdmi_daiops_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
struct lpass_dp_metadata_ctl *meta_ctl = drvdata->meta_ctl;
struct lpass_sstream_ctl *sstream_ctl = drvdata->sstream_ctl;
int ret = -EINVAL;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = regmap_field_write(sstream_ctl->sstream_en, LPASS_SSTREAM_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->mute, LPASS_MUTE_DISABLE);
if (ret)
return ret;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = regmap_field_write(sstream_ctl->sstream_en, LPASS_SSTREAM_DISABLE);
if (ret)
return ret;
ret = regmap_field_write(meta_ctl->mute, LPASS_MUTE_ENABLE);
if (ret)
return ret;
ret = regmap_field_write(sstream_ctl->dp_audio, 0);
if (ret)
return ret;
break;
}
return ret;
}
const struct snd_soc_dai_ops asoc_qcom_lpass_hdmi_dai_ops = {
.hw_params = lpass_hdmi_daiops_hw_params,
.prepare = lpass_hdmi_daiops_prepare,
.trigger = lpass_hdmi_daiops_trigger,
};
EXPORT_SYMBOL_GPL(asoc_qcom_lpass_hdmi_dai_ops);
MODULE_DESCRIPTION("QTi LPASS HDMI Driver");
MODULE_LICENSE("GPL v2");
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