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ASoC: rsnd: add DPCM based sampling rate convert 

This patch supports DPCM based sampling rate convert on Renesas sound
driver. It assumes...
 1. SRC is implemented as FE
 2. BE dai_link supports .be_hw_params_fixup

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 2015-03-26 04:02:51 +00:00 committed by Mark Brown
parent b543b52a44
commit 3b7843ff61
3 changed files with 63 additions and 5 deletions
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11
sound/soc/sh/rcar/core.c
View File

@ -203,7 +203,7 @@ u32 rsnd_get_adinr(struct rsnd_mod *mod)
({ \
struct rsnd_priv *priv = rsnd_mod_to_priv(mod); \
struct device *dev = rsnd_priv_to_dev(priv); \
u32 mask = 1 << __rsnd_mod_shift_##func; \
u32 mask = (1 << __rsnd_mod_shift_##func) & ~(1 << 31); \
u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func; \
int ret = 0; \
if ((mod->status & mask) == call) { \
@ -728,6 +728,15 @@ static int rsnd_pcm_open(struct snd_pcm_substream *substream)
static int rsnd_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
int ret;
ret = rsnd_dai_call(hw_params, io, substream, hw_params);
if (ret)
return ret;
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}

8
sound/soc/sh/rcar/rsnd.h
View File

@ -239,6 +239,9 @@ struct rsnd_mod_ops {
struct rsnd_priv *priv);
int (*pcm_new)(struct rsnd_mod *mod,
struct snd_soc_pcm_runtime *rtd);
int (*hw_params)(struct rsnd_mod *mod,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params);
int (*fallback)(struct rsnd_mod *mod,
struct rsnd_priv *priv);
};
@ -262,6 +265,9 @@ struct rsnd_mod {
* 2 0: start 1: stop
* 3 0: pcm_new
* 4 0: fallback
*
* 31 bit is always called (see __rsnd_mod_call)
* 31 0: hw_params
*/
#define __rsnd_mod_shift_probe 0
#define __rsnd_mod_shift_remove 0
@ -271,6 +277,7 @@ struct rsnd_mod {
#define __rsnd_mod_shift_stop 2
#define __rsnd_mod_shift_pcm_new 3
#define __rsnd_mod_shift_fallback 4
#define __rsnd_mod_shift_hw_params 31 /* always called */
#define __rsnd_mod_call_probe 0
#define __rsnd_mod_call_remove 1
@ -280,6 +287,7 @@ struct rsnd_mod {
#define __rsnd_mod_call_stop 1
#define __rsnd_mod_call_pcm_new 0
#define __rsnd_mod_call_fallback 0
#define __rsnd_mod_call_hw_params 0
#define rsnd_mod_to_priv(mod) (rsnd_io_to_priv(rsnd_mod_to_io(mod)))
#define rsnd_mod_to_dma(mod) (&(mod)->dma)

49
sound/soc/sh/rcar/src.c
View File

@ -22,12 +22,13 @@
struct rsnd_src {
struct rsnd_src_platform_info *info; /* rcar_snd.h */
struct rsnd_mod mod;
u32 convert_rate; /* sampling rate convert */
int err;
};
#define RSND_SRC_NAME_SIZE 16
#define rsnd_src_convert_rate(p) ((p)->info->convert_rate)
#define rsnd_src_convert_rate(s) ((s)->convert_rate)
#define rsnd_src_of_node(priv) \
of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,src")
@ -288,7 +289,43 @@ static int rsnd_src_set_convert_rate(struct rsnd_mod *mod)
return 0;
}
static int rsnd_src_init(struct rsnd_mod *mod)
static int rsnd_src_hw_params(struct rsnd_mod *mod,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *fe_params)
{
struct rsnd_src *src = rsnd_mod_to_src(mod);
struct snd_soc_pcm_runtime *fe = substream->private_data;
/* default value (mainly for non-DT) */
src->convert_rate = src->info->convert_rate;
/*
* SRC assumes that it is used under DPCM if user want to use
* sampling rate convert. Then, SRC should be FE.
* And then, this function will be called *after* BE settings.
* this means, each BE already has fixuped hw_params.
* see
* dpcm_fe_dai_hw_params()
* dpcm_be_dai_hw_params()
*/
if (fe->dai_link->dynamic) {
int stream = substream->stream;
struct snd_soc_dpcm *dpcm;
struct snd_pcm_hw_params *be_params;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
be_params = &dpcm->hw_params;
if (params_rate(fe_params) != params_rate(be_params))
src->convert_rate = params_rate(be_params);
}
}
return 0;
}
static int rsnd_src_init(struct rsnd_mod *mod,
struct rsnd_priv *priv)
{
struct rsnd_src *src = rsnd_mod_to_src(mod);
@ -317,6 +354,8 @@ static int rsnd_src_quit(struct rsnd_mod *mod,
dev_warn(dev, "%s[%d] under/over flow err = %d\n",
rsnd_mod_name(mod), rsnd_mod_id(mod), src->err);
src->convert_rate = 0;
return 0;
}
@ -465,7 +504,7 @@ static int rsnd_src_init_gen1(struct rsnd_mod *mod,
{
int ret;
ret = rsnd_src_init(mod);
ret = rsnd_src_init(mod, priv);
if (ret < 0)
return ret;
@ -511,6 +550,7 @@ static struct rsnd_mod_ops rsnd_src_gen1_ops = {
.quit = rsnd_src_quit,
.start = rsnd_src_start_gen1,
.stop = rsnd_src_stop_gen1,
.hw_params = rsnd_src_hw_params,
};
/*
@ -736,7 +776,7 @@ static int rsnd_src_init_gen2(struct rsnd_mod *mod,
{
int ret;
ret = rsnd_src_init(mod);
ret = rsnd_src_init(mod, priv);
if (ret < 0)
return ret;
@ -780,6 +820,7 @@ static struct rsnd_mod_ops rsnd_src_gen2_ops = {
.quit = rsnd_src_quit,
.start = rsnd_src_start_gen2,
.stop = rsnd_src_stop_gen2,
.hw_params = rsnd_src_hw_params,
};
struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)