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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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2015-05-12 02:03:33 +00:00 committed by Mark Brown
parent 2dc0f16b83
commit b073ed4e21
2 changed files with 45 additions and 5 deletions
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3
include/sound/soc.h
View File

@ -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;
};

47
sound/soc/soc-pcm.c
View File

@ -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);