diff options
| author | Richard Genoud <richard.genoud@gmail.com> | 2013-07-30 11:59:45 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-07-30 12:28:01 +0100 |
| commit | 0890c2b7be08b0928f7f507e371918205a0312f7 (patch) | |
| tree | e646a76e52744cb042fd31aa4973e4fd3a5beabd /sound/soc/codecs/wm8731.c | |
| parent | 5ae90d8e467e625e447000cb4335c4db973b1095 (diff) | |
ASoC: wm8731: add rates constraints
Depending on the mclk (or crystal) selected, the wm8731 codec have some
constraints on its data sampling rates:
e.g. with a 12.288MHz or 18.432MHz crystal, the authorized rates are
8KHz, 32KHz, 48KHz and 96KHz.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/codecs/wm8731.c')
| -rw-r--r-- | sound/soc/codecs/wm8731.c | 60 |
1 files changed, 57 insertions, 3 deletions
diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c index 5276062d6c7..456bb8c6d75 100644 --- a/sound/soc/codecs/wm8731.c +++ b/sound/soc/codecs/wm8731.c @@ -45,6 +45,7 @@ static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { struct wm8731_priv { struct regmap *regmap; struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; + const struct snd_pcm_hw_constraint_list *constraints; unsigned int sysclk; int sysclk_type; int playback_fs; @@ -290,6 +291,36 @@ static const struct _coeff_div coeff_div[] = { {12000000, 88200, 136, 0xf, 0x1, 0x1}, }; +/* rates constraints */ +static const unsigned int wm8731_rates_12000000[] = { + 8000, 32000, 44100, 48000, 96000, 88200, +}; + +static const unsigned int wm8731_rates_12288000_18432000[] = { + 8000, 32000, 48000, 96000, +}; + +static const unsigned int wm8731_rates_11289600_16934400[] = { + 8000, 44100, 88200, +}; + +static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { + .list = wm8731_rates_12000000, + .count = ARRAY_SIZE(wm8731_rates_12000000), +}; + +static const +struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { + .list = wm8731_rates_12288000_18432000, + .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), +}; + +static const +struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { + .list = wm8731_rates_11289600_16934400, + .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), +}; + static inline int get_coeff(int mclk, int rate) { int i; @@ -362,17 +393,26 @@ static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, } switch (freq) { - case 11289600: + case 0: + wm8731->constraints = NULL; + break; case 12000000: + wm8731->constraints = &wm8731_constraints_12000000; + break; case 12288000: - case 16934400: case 18432000: - wm8731->sysclk = freq; + wm8731->constraints = &wm8731_constraints_12288000_18432000; + break; + case 16934400: + case 11289600: + wm8731->constraints = &wm8731_constraints_11289600_16934400; break; default: return -EINVAL; } + wm8731->sysclk = freq; + snd_soc_dapm_sync(&codec->dapm); return 0; @@ -475,12 +515,26 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec, return 0; } +static int wm8731_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec); + + if (wm8731->constraints) + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + wm8731->constraints); + + return 0; +} + #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) static const struct snd_soc_dai_ops wm8731_dai_ops = { + .startup = wm8731_startup, .hw_params = wm8731_hw_params, .digital_mute = wm8731_mute, .set_sysclk = wm8731_set_dai_sysclk, |