From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
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 --- sound/soc/sh/rcar/core.c | 9 +++++++++ sound/soc/sh/rcar/rsnd.h | 6 ++++++ sound/soc/sh/rcar/src.c | 49 ++++++++++++++++++++++++++++++++++++++++++++---- 3 files changed, 60 insertions(+), 4 deletions(-)
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c index 929c282..b3851cf 100644 --- a/sound/soc/sh/rcar/core.c +++ b/sound/soc/sh/rcar/core.c @@ -742,6 +742,15 @@ 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)); } diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h index be1ca7a..4ada02b 100644 --- a/sound/soc/sh/rcar/rsnd.h +++ b/sound/soc/sh/rcar/rsnd.h @@ -240,6 +240,9 @@ struct rsnd_mod_ops { int (*clk)(struct rsnd_mod *mod, int enable); 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); }; @@ -266,6 +269,7 @@ struct rsnd_mod { * * 31 bit is always called (see __rsnd_mod_call) * 31 0: clk + * 31 0: hw_params */ #define __rsnd_mod_shift_probe 0 #define __rsnd_mod_shift_remove 0 @@ -276,6 +280,7 @@ struct rsnd_mod { #define __rsnd_mod_shift_pcm_new 3 #define __rsnd_mod_shift_fallback 4 #define __rsnd_mod_shift_clk 31 /* always called */ +#define __rsnd_mod_shift_hw_params 31 /* always called */
#define __rsnd_mod_call_probe 0 #define __rsnd_mod_call_remove 1 @@ -286,6 +291,7 @@ struct rsnd_mod { #define __rsnd_mod_call_pcm_new 0 #define __rsnd_mod_call_fallback 0 #define __rsnd_mod_call_clk 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) diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c index 83032ee..f53f625 100644 --- a/sound/soc/sh/rcar/src.c +++ b/sound/soc/sh/rcar/src.c @@ -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);
@@ -313,6 +350,8 @@ 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; }
@@ -472,7 +511,7 @@ 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;
@@ -520,6 +559,7 @@ static struct rsnd_mod_ops rsnd_src_gen1_ops = { .start = rsnd_src_start_gen1, .stop = rsnd_src_stop_gen1, .clk = rsnd_mod_clk, + .hw_params = rsnd_src_hw_params, };
/* @@ -756,7 +796,7 @@ 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;
@@ -801,6 +841,7 @@ static struct rsnd_mod_ops rsnd_src_gen2_ops = { .start = rsnd_src_start_gen2, .stop = rsnd_src_stop_gen2, .clk = rsnd_mod_clk, + .hw_params = rsnd_src_hw_params, };
struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)