C++ (Cpp) sun4i_codec_get_hw_rate Examples

Example #1

File: sun4i-codec.c Project: 020gzh/linux

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);
}

Example #2

File: sun4i-codec.c Project: raoy1990/linux

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;
}