On 17/03/2020 13:07, Pierre-Louis Bossart wrote:
@@ -45,11 +48,20 @@ static int sdm845_slim_snd_hw_params(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai; + struct sdm845_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card); u32 rx_ch[SLIM_MAX_RX_PORTS], tx_ch[SLIM_MAX_TX_PORTS]; + struct sdw_stream_runtime *sruntime; u32 rx_ch_cnt = 0, tx_ch_cnt = 0; int ret = 0, i; for_each_rtd_codec_dais(rtd, i, codec_dai) { + sruntime = snd_soc_dai_get_sdw_stream(codec_dai, + substream->stream); + if (sruntime != ERR_PTR(-ENOTSUPP)) + pdata->sruntime[cpu_dai->id] = sruntime; + else + pdata->sruntime[cpu_dai->id] = NULL;
Can you explain this part? The get_sdw_stream() is supposed to return what was set by set_sdw_stream(), so if it's not supported isn't this an error?
In this case its not an error because we have totally 3 codecs in this path. One wcd934x Slimbus codec and two wsa881x Soundwire Codec.
wcd934x codec side will return ENOTSUPP which is not an error.
ret = snd_soc_dai_get_channel_map(codec_dai, &tx_ch_cnt, tx_ch, &rx_ch_cnt, rx_ch); @@ -425,8 +437,65 @@ static void sdm845_snd_shutdown(struct snd_pcm_substream *substream) } } +static int sdm845_snd_prepare(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sdm845_snd_data *data = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id]; + int ret;
+ if (!sruntime) + return 0;
same here, isn't this an error?
These callbacks are used for other dais aswell in this case HDMI, Slimbus and Soundwire, so sruntime being null is not treated as error.
+ if (data->stream_prepared[cpu_dai->id]) { + sdw_disable_stream(sruntime); + sdw_deprepare_stream(sruntime); + data->stream_prepared[cpu_dai->id] = false; + }
+ ret = sdw_prepare_stream(sruntime); + if (ret) + return ret;
+ /** + * NOTE: there is a strict hw requirement about the ordering of port + * enables and actual WSA881x PA enable. PA enable should only happen + * after soundwire ports are enabled if not DC on the line is + * accumulated resulting in Click/Pop Noise + * PA enable/mute are handled as part of codec DAPM and digital mute. + */
+ ret = sdw_enable_stream(sruntime); + if (ret) { + sdw_deprepare_stream(sruntime); + return ret; + } + data->stream_prepared[cpu_dai->id] = true;
+ return ret; +}
+static int sdm845_snd_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sdm845_snd_data *data = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+ if (sruntime && data->stream_prepared[cpu_dai->id]) {
and here?
Really wondering where the stream is actually allocated and set.
Controller is allocating the runtime in this case.
+ sdw_disable_stream(sruntime); + sdw_deprepare_stream(sruntime); + data->stream_prepared[cpu_dai->id] = false; + }
+ return 0; +}
static const struct snd_soc_ops sdm845_be_ops = { .hw_params = sdm845_snd_hw_params, + .hw_free = sdm845_snd_hw_free, + .prepare = sdm845_snd_prepare, .startup = sdm845_snd_startup, .shutdown = sdm845_snd_shutdown, };