static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
unsigned long clk_freq;
int ret, hwrate;
clk_freq = sun4i_codec_get_mod_freq(params);
if (!clk_freq)
return -EINVAL;
ret = clk_set_rate(scodec->clk_module, clk_freq);
if (ret)
return ret;
hwrate = sun4i_codec_get_hw_rate(params);
if (hwrate < 0)
return hwrate;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return sun4i_codec_hw_params_playback(scodec, params,
hwrate);
return sun4i_codec_hw_params_capture(scodec, params,
hwrate);
}
static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
unsigned long clk_freq;
int ret, hwrate;
u32 val;
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -ENOTSUPP;
clk_freq = sun4i_codec_get_mod_freq(params);
if (!clk_freq)
return -EINVAL;
ret = clk_set_rate(scodec->clk_module, clk_freq);
if (ret)
return ret;
hwrate = sun4i_codec_get_hw_rate(params);
if (hwrate < 0)
return hwrate;
/* Set DAC sample rate */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
7 << SUN4I_CODEC_DAC_FIFOC_DAC_FS,
hwrate << SUN4I_CODEC_DAC_FIFOC_DAC_FS);
/* Set the number of channels we want to use */
if (params_channels(params) == 1)
val = BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN);
else
val = 0;
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN),
val);
/* Set the number of sample bits to either 16 or 24 bits */
if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min == 32) {
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS));
/* Set TX FIFO mode to padding the LSBs with 0 */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
0);
scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
} else {
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
0);
/* Set TX FIFO mode to repeat the MSB */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE));
scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
}
return 0;
}
