redonkable/alistair23-linux
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ASoC: rsrc-card: add convert channels support

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Renesas sound device has CTU (= Channel Transfer Unit), and
sound card needs its support.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2016-02-25 05:51:44 +00:00 committed by Mark Brown
parent d728956548
commit f90432fc6e
2 changed files with 17 additions and 6 deletions
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1
Documentation/devicetree/bindings/sound/renesas,rsrc-card.txt
View file

@ -30,6 +30,7 @@ Optional subnode properties:
- frame-inversion : bool property. Add this if the
dai-link uses frame clock inversion.
- convert-rate : platform specified sampling rate convert
- convert-channels : platform specified channel size convert
- audio-prefix : see audio-routing
- audio-routing : A list of the connections between audio components.
Each entry is a pair of strings, the first being the connection's sink,

22
sound/soc/sh/rcar/rsrc-card.c
View file

@ -66,6 +66,7 @@ struct rsrc_card_priv {
struct snd_soc_dai_link *dai_link;
int dai_num;
u32 convert_rate;
u32 convert_channels;
};
#define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
@ -144,11 +145,16 @@ static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
struct snd_interval *rate = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
if (!priv->convert_rate)
return 0;
if (priv->convert_rate)
rate->min =
rate->max = priv->convert_rate;
rate->min = rate->max = priv->convert_rate;
if (priv->convert_channels)
channels->min =
channels->max = priv->convert_channels;
return 0;
}
@ -436,9 +442,13 @@ static int rsrc_card_parse_of(struct device_node *node,
/* sampling rate convert */
of_property_read_u32(node, "convert-rate", &priv->convert_rate);
dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
priv->snd_card.name ? priv->snd_card.name : "",
priv->convert_rate);
/* channels transfer */
of_property_read_u32(node, "convert-channels", &priv->convert_channels);
dev_dbg(dev, "New rsrc-audio-card: %s\n",
priv->snd_card.name ? priv->snd_card.name : "");
dev_dbg(dev, "SRC : convert_rate %d\n", priv->convert_rate);
dev_dbg(dev, "CTU : convert_channels %d\n", priv->convert_channels);
ret = rsrc_card_dai_link_of(node, priv);
if (ret < 0)