diff options
Diffstat (limited to 'sound/soc/soc-utils.c')
| -rw-r--r-- | sound/soc/soc-utils.c | 100 |
1 files changed, 97 insertions, 3 deletions
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c index 922eac930df9..a3b6df2378b4 100644 --- a/sound/soc/soc-utils.c +++ b/sound/soc/soc-utils.c @@ -9,6 +9,7 @@ #include <linux/platform_device.h> #include <linux/export.h> +#include <linux/math.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -52,6 +53,51 @@ int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) } EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); +/** + * snd_soc_tdm_params_to_bclk - calculate bclk from params and tdm slot info. + * + * Calculate the bclk from the params sample rate, the tdm slot count and the + * tdm slot width. Optionally round-up the slot count to a given multiple. + * Either or both of tdm_width and tdm_slots can be 0. + * + * If tdm_width == 0: use params_width() as the slot width. + * If tdm_slots == 0: use params_channels() as the slot count. + * + * If slot_multiple > 1 the slot count (or params_channels() if tdm_slots == 0) + * will be rounded up to a multiple of slot_multiple. This is mainly useful for + * I2S mode, which has a left and right phase so the number of slots is always + * a multiple of 2. + * + * If tdm_width == 0 && tdm_slots == 0 && slot_multiple < 2, this is equivalent + * to calling snd_soc_params_to_bclk(). + * + * @params: Pointer to struct_pcm_hw_params. + * @tdm_width: Width in bits of the tdm slots. Must be >= 0. + * @tdm_slots: Number of tdm slots per frame. Must be >= 0. + * @slot_multiple: If >1 roundup slot count to a multiple of this value. + * + * Return: bclk frequency in Hz, else a negative error code if params format + * is invalid. + */ +int snd_soc_tdm_params_to_bclk(struct snd_pcm_hw_params *params, + int tdm_width, int tdm_slots, int slot_multiple) +{ + if (!tdm_slots) + tdm_slots = params_channels(params); + + if (slot_multiple > 1) + tdm_slots = roundup(tdm_slots, slot_multiple); + + if (!tdm_width) { + tdm_width = snd_pcm_format_width(params_format(params)); + if (tdm_width < 0) + return tdm_width; + } + + return snd_soc_calc_bclk(params_rate(params), tdm_width, 1, tdm_slots); +} +EXPORT_SYMBOL_GPL(snd_soc_tdm_params_to_bclk); + static const struct snd_pcm_hardware dummy_dma_hardware = { /* Random values to keep userspace happy when checking constraints */ .info = SNDRV_PCM_INFO_INTERLEAVED | @@ -63,10 +109,23 @@ static const struct snd_pcm_hardware dummy_dma_hardware = { .periods_max = 128, }; + +static const struct snd_soc_component_driver dummy_platform; + static int dummy_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + int i; + + /* + * If there are other components associated with rtd, we shouldn't + * override their hwparams + */ + for_each_rtd_components(rtd, i, component) { + if (component->driver == &dummy_platform) + return 0; + } /* BE's dont need dummy params */ if (!rtd->dai_link->no_pcm) @@ -83,19 +142,47 @@ static const struct snd_soc_component_driver dummy_codec = { .idle_bias_on = 1, .use_pmdown_time = 1, .endianness = 1, - .non_legacy_dai_naming = 1, }; -#define STUB_RATES SNDRV_PCM_RATE_8000_192000 +#define STUB_RATES SNDRV_PCM_RATE_8000_384000 #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ SNDRV_PCM_FMTBIT_U8 | \ SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_U16_LE | \ SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S24_3LE | \ SNDRV_PCM_FMTBIT_U24_LE | \ SNDRV_PCM_FMTBIT_S32_LE | \ SNDRV_PCM_FMTBIT_U32_LE | \ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) + +/* + * Select these from Sound Card Manually + * SND_SOC_POSSIBLE_DAIFMT_CBP_CFP + * SND_SOC_POSSIBLE_DAIFMT_CBP_CFC + * SND_SOC_POSSIBLE_DAIFMT_CBC_CFP + * SND_SOC_POSSIBLE_DAIFMT_CBC_CFC + */ +static u64 dummy_dai_formats = + SND_SOC_POSSIBLE_DAIFMT_I2S | + SND_SOC_POSSIBLE_DAIFMT_RIGHT_J | + SND_SOC_POSSIBLE_DAIFMT_LEFT_J | + SND_SOC_POSSIBLE_DAIFMT_DSP_A | + SND_SOC_POSSIBLE_DAIFMT_DSP_B | + SND_SOC_POSSIBLE_DAIFMT_AC97 | + SND_SOC_POSSIBLE_DAIFMT_PDM | + SND_SOC_POSSIBLE_DAIFMT_GATED | + SND_SOC_POSSIBLE_DAIFMT_CONT | + SND_SOC_POSSIBLE_DAIFMT_NB_NF | + SND_SOC_POSSIBLE_DAIFMT_NB_IF | + SND_SOC_POSSIBLE_DAIFMT_IB_NF | + SND_SOC_POSSIBLE_DAIFMT_IB_IF; + +static const struct snd_soc_dai_ops dummy_dai_ops = { + .auto_selectable_formats = &dummy_dai_formats, + .num_auto_selectable_formats = 1, +}; + /* * The dummy CODEC is only meant to be used in situations where there is no * actual hardware. @@ -121,6 +208,7 @@ static struct snd_soc_dai_driver dummy_dai = { .rates = STUB_RATES, .formats = STUB_FORMATS, }, + .ops = &dummy_dai_ops, }; int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) @@ -130,6 +218,12 @@ int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) return 0; } +int snd_soc_component_is_dummy(struct snd_soc_component *component) +{ + return ((component->driver == &dummy_platform) || + (component->driver == &dummy_codec)); +} + static int snd_soc_dummy_probe(struct platform_device *pdev) { int ret; |