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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ASoC: imx-rpmsg: Add DSD format support with dynamic DAI format switching
Add hw_params callback to dynamically switch DAI format between I2S
and PDM based on audio stream format. When DSD formats are detected,
the DAI format is switched to PDM mode.
Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Link: https://patch.msgid.link/20260326055614.3614104-1-chancel.liu@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
authored by
Chancel Liu
and committed by
Mark Brown
ccd7e53b
ba2a0e81
+48
+48
sound/soc/fsl/imx-rpmsg.c
+48
sound/soc/fsl/imx-rpmsg.c
···
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SND_SOC_DAPM_MIC("Main MIC", NULL),
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};
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static int imx_rpmsg_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
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snd_pcm_format_t format = params_format(params);
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struct device *dev = rtd->card->dev;
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unsigned int fmt = rtd->dai_link->dai_fmt;
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bool format_is_dsd = false;
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int ret;
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switch (format) {
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case SNDRV_PCM_FORMAT_DSD_U8:
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case SNDRV_PCM_FORMAT_DSD_U16_LE:
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case SNDRV_PCM_FORMAT_DSD_U16_BE:
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case SNDRV_PCM_FORMAT_DSD_U32_LE:
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case SNDRV_PCM_FORMAT_DSD_U32_BE:
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format_is_dsd = true;
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break;
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default:
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format_is_dsd = false;
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break;
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}
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if (format_is_dsd)
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fmt = (rtd->dai_link->dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) |
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SND_SOC_DAIFMT_PDM;
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
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return ret;
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}
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ret = snd_soc_dai_set_fmt(codec_dai, fmt);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct snd_soc_ops imx_rpmsg_ops = {
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.hw_params = imx_rpmsg_hw_params,
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};
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+
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static int imx_rpmsg_late_probe(struct snd_soc_card *card)
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{
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struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
···
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data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBC_CFC;
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data->dai.ops = &imx_rpmsg_ops;
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/*
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* i.MX rpmsg sound cards work on codec slave mode. MCLK will be