Commit b073ed4e authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

ASoC: soc-pcm: DPCM cares BE format 



Current DPCM is caring only FE format. but it will be no sound
if FE/BE was below style, and user selects S24_LE format.

        FE: S16_LE/S24_LE
        BE: S16_LE

DPCM can rewrite the format, so basically we don't want to
constrain with the BE constraints. But sometimes it will be trouble.
This patch adds new .dpcm_merged_format on struct snd_soc_dai_link.
DPCM will use FE / BE merged format if .struct snd_soc_dai_link
has it. We can have other .dpcm_merged_xxx in the future

    .dpcm_merged_foramt
    .dpcm_merged_rate
    .dpcm_merged_chan

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: default avatarKeita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 2dc0f16b

include/sound/soc.h

+3 −0
Original line number Diff line number Diff line
@@ -985,6 +985,9 @@ struct snd_soc_dai_link { 
	unsigned int dpcm_capture:1;

	unsigned int dpcm_playback:1;



	/* DPCM used FE & BE merged format */

	unsigned int dpcm_merged_format:1;



	/* pmdown_time is ignored at stop */

	unsigned int ignore_pmdown_time:1;

};

sound/soc/soc-pcm.c

+42 −5
Original line number Diff line number Diff line
@@ -1485,30 +1485,67 @@ unwind: 
}



static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,

	struct snd_soc_pcm_stream *stream)

				 struct snd_soc_pcm_stream *stream,

				 u64 formats)

{

	runtime->hw.rate_min = stream->rate_min;

	runtime->hw.rate_max = stream->rate_max;

	runtime->hw.channels_min = stream->channels_min;

	runtime->hw.channels_max = stream->channels_max;

	if (runtime->hw.formats)

		runtime->hw.formats &= stream->formats;

		runtime->hw.formats &= formats & stream->formats;

	else

		runtime->hw.formats = stream->formats;

		runtime->hw.formats = formats & stream->formats;

	runtime->hw.rates = stream->rates;

}



static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *fe = substream->private_data;

	struct snd_soc_dpcm *dpcm;

	u64 formats = ULLONG_MAX;

	int stream = substream->stream;



	if (!fe->dai_link->dpcm_merged_format)

		return formats;



	/*

	 * It returns merged BE codec format

	 * if FE want to use it (= dpcm_merged_format)

	 */



	list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {

		struct snd_soc_pcm_runtime *be = dpcm->be;

		struct snd_soc_dai_driver *codec_dai_drv;

		struct snd_soc_pcm_stream *codec_stream;

		int i;



		for (i = 0; i < be->num_codecs; i++) {

			codec_dai_drv = be->codec_dais[i]->driver;

			if (stream == SNDRV_PCM_STREAM_PLAYBACK)

				codec_stream = &codec_dai_drv->playback;

			else

				codec_stream = &codec_dai_drv->capture;



			formats &= codec_stream->formats;

		}

	}



	return formats;

}



static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)

{

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

	struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;

	u64 format = dpcm_runtime_base_format(substream);



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);

		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);

	else

		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);

		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);

}



static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);

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