diff options
Diffstat (limited to 'sound/soc/qcom/lpass-hdmi.c')
| -rw-r--r-- | sound/soc/qcom/lpass-hdmi.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/sound/soc/qcom/lpass-hdmi.c b/sound/soc/qcom/lpass-hdmi.c new file mode 100644 index 000000000..24b1a7523 --- /dev/null +++ b/sound/soc/qcom/lpass-hdmi.c @@ -0,0 +1,254 @@ +// 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"); |