[RFC, PATCH v2 1/2] ASoC: qcom: sdw: Add TDM support

From: Jianhua Lu
Date: Tue Dec 12 2023 - 04:59:09 EST


Add qcom TDM setup function to support TDM ports for qcom platform.

Signed-off-by: Jianhua Lu <lujianhua000@xxxxxxxxx>
---
Changes in v2:
1. remove EXPORT_SYMBOL_GPL
2. remove static modifier

sound/soc/qcom/sdw.c | 63 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)

diff --git a/sound/soc/qcom/sdw.c b/sound/soc/qcom/sdw.c
index 77dbe0c28b29..948abbd2e0e3 100644
--- a/sound/soc/qcom/sdw.c
+++ b/sound/soc/qcom/sdw.c
@@ -4,6 +4,7 @@

#include <dt-bindings/sound/qcom,q6afe.h>
#include <linux/module.h>
+#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "sdw.h"

@@ -101,6 +102,65 @@ int qcom_snd_sdw_prepare(struct snd_pcm_substream *substream,
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_prepare);

+int qcom_snd_tdm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+ struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+ unsigned int tdm_slot_offset[8] = { 0, 4, 8, 12, 16, 20, 24, 28 };
+ int channels, slot_width;
+ int ret;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ slot_width = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ slot_width = 24;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ slot_width = 32;
+ break;
+ default:
+ dev_err(rtd->dev, "%s: invalid param format 0x%x\n", __func__,
+ params_format(params));
+ return -EINVAL;
+ }
+
+ channels = params_channels(params);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3, 8, slot_width);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL, channels,
+ tdm_slot_offset);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+ __func__, ret);
+ return ret;
+ }
+ } else {
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0, 8, slot_width);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
+ tdm_slot_offset, 0, NULL);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+ __func__, ret);
+ return ret;
+ }
+ }
+}
+
int qcom_snd_sdw_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct sdw_stream_runtime **psruntime)
@@ -125,6 +185,9 @@ int qcom_snd_sdw_hw_params(struct snd_pcm_substream *substream,
*psruntime = sruntime;
}
break;
+ case PRIMARY_TDM_RX_0...QUINARY_TDM_TX_7:
+ qcom_snd_tdm_hw_params(substream, params);
+ break;
}

return 0;
--
2.41.0