ASRC can be used on memory to memory case, define several functions for m2m usage and export them as function pointer.
Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com --- sound/soc/fsl/fsl_easrc.c | 226 ++++++++++++++++++++++++++++++++++++++ sound/soc/fsl/fsl_easrc.h | 4 + 2 files changed, 230 insertions(+)
diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c index 962f30912091..959a8e2dd716 100644 --- a/sound/soc/fsl/fsl_easrc.c +++ b/sound/soc/fsl/fsl_easrc.c @@ -1861,6 +1861,222 @@ static int fsl_easrc_get_fifo_addr(u8 dir, enum asrc_pair_index index) return REG_EASRC_FIFO(dir, index); }
+/* Get sample numbers in FIFO */ +static unsigned int fsl_easrc_get_output_fifo_size(struct fsl_asrc_pair *pair) +{ + struct fsl_asrc *asrc = pair->asrc; + enum asrc_pair_index index = pair->index; + u32 val; + + regmap_read(asrc->regmap, REG_EASRC_SFS(index), &val); + val &= EASRC_SFS_NSGO_MASK; + + return val >> EASRC_SFS_NSGO_SHIFT; +} + +static int fsl_easrc_m2m_prepare(struct fsl_asrc_pair *pair) +{ + struct fsl_easrc_ctx_priv *ctx_priv = pair->private; + struct fsl_asrc *asrc = pair->asrc; + struct device *dev = &asrc->pdev->dev; + int ret; + + ctx_priv->in_params.sample_rate = pair->rate[IN]; + ctx_priv->in_params.sample_format = pair->sample_format[IN]; + ctx_priv->out_params.sample_rate = pair->rate[OUT]; + ctx_priv->out_params.sample_format = pair->sample_format[OUT]; + + ctx_priv->in_params.fifo_wtmk = FSL_EASRC_INPUTFIFO_WML; + ctx_priv->out_params.fifo_wtmk = FSL_EASRC_OUTPUTFIFO_WML; + /* Fill the right half of the re-sampler with zeros */ + ctx_priv->rs_init_mode = 0x2; + /* Zero fill the right half of the prefilter */ + ctx_priv->pf_init_mode = 0x2; + + ret = fsl_easrc_set_ctx_format(pair, + &ctx_priv->in_params.sample_format, + &ctx_priv->out_params.sample_format); + if (ret) { + dev_err(dev, "failed to set context format: %d\n", ret); + return ret; + } + + ret = fsl_easrc_config_context(asrc, pair->index); + if (ret) { + dev_err(dev, "failed to config context %d\n", ret); + return ret; + } + + ctx_priv->in_params.iterations = 1; + ctx_priv->in_params.group_len = pair->channels; + ctx_priv->in_params.access_len = pair->channels; + ctx_priv->out_params.iterations = 1; + ctx_priv->out_params.group_len = pair->channels; + ctx_priv->out_params.access_len = pair->channels; + + ret = fsl_easrc_set_ctx_organziation(pair); + if (ret) { + dev_err(dev, "failed to set fifo organization\n"); + return ret; + } + + /* The context start flag */ + pair->first_convert = 1; + return 0; +} + +static int fsl_easrc_m2m_start(struct fsl_asrc_pair *pair) +{ + /* start context once */ + if (pair->first_convert) { + fsl_easrc_start_context(pair); + pair->first_convert = 0; + } + + return 0; +} + +static int fsl_easrc_m2m_stop(struct fsl_asrc_pair *pair) +{ + /* Stop pair/context */ + if (!pair->first_convert) { + fsl_easrc_stop_context(pair); + pair->first_convert = 1; + } + + return 0; +} + +/* calculate capture data length according to output data length and sample rate */ +static int fsl_easrc_m2m_calc_out_len(struct fsl_asrc_pair *pair, int input_buffer_length) +{ + struct fsl_asrc *easrc = pair->asrc; + struct fsl_easrc_priv *easrc_priv = easrc->private; + struct fsl_easrc_ctx_priv *ctx_priv = pair->private; + unsigned int in_rate = ctx_priv->in_params.norm_rate; + unsigned int out_rate = ctx_priv->out_params.norm_rate; + unsigned int channels = pair->channels; + unsigned int in_samples, out_samples; + unsigned int in_width, out_width; + unsigned int out_length; + unsigned int frac_bits; + u64 val1, val2; + + switch (easrc_priv->rs_num_taps) { + case EASRC_RS_32_TAPS: + /* integer bits = 5; */ + frac_bits = 39; + break; + case EASRC_RS_64_TAPS: + /* integer bits = 6; */ + frac_bits = 38; + break; + case EASRC_RS_128_TAPS: + /* integer bits = 7; */ + frac_bits = 37; + break; + default: + return -EINVAL; + } + + val1 = (u64)in_rate << frac_bits; + do_div(val1, out_rate); + val1 += (s64)ctx_priv->ratio_mod << (frac_bits - 31); + + in_width = snd_pcm_format_physical_width(ctx_priv->in_params.sample_format) / 8; + out_width = snd_pcm_format_physical_width(ctx_priv->out_params.sample_format) / 8; + + ctx_priv->in_filled_len += input_buffer_length; + if (ctx_priv->in_filled_len <= ctx_priv->in_filled_sample * in_width * channels) { + out_length = 0; + } else { + in_samples = ctx_priv->in_filled_len / (in_width * channels) - + ctx_priv->in_filled_sample; + + /* right shift 12 bit to make ratio in 32bit space */ + val2 = (u64)in_samples << (frac_bits - 12); + val1 = val1 >> 12; + do_div(val2, val1); + out_samples = val2; + + out_length = out_samples * out_width * channels; + ctx_priv->in_filled_len = ctx_priv->in_filled_sample * in_width * channels; + } + + return out_length; +} + +static int fsl_easrc_m2m_get_maxburst(u8 dir, struct fsl_asrc_pair *pair) +{ + struct fsl_easrc_ctx_priv *ctx_priv = pair->private; + + if (dir == IN) + return ctx_priv->in_params.fifo_wtmk * pair->channels; + else + return ctx_priv->out_params.fifo_wtmk * pair->channels; +} + +static int fsl_easrc_m2m_pair_suspend(struct fsl_asrc_pair *pair) +{ + fsl_easrc_stop_context(pair); + + return 0; +} + +static int fsl_easrc_m2m_pair_resume(struct fsl_asrc_pair *pair) +{ + struct fsl_easrc_ctx_priv *ctx_priv = pair->private; + + pair->first_convert = 1; + ctx_priv->in_filled_len = 0; + + return 0; +} + +/* val is Q31 */ +static int fsl_easrc_m2m_set_ratio_mod(struct fsl_asrc_pair *pair, int val) +{ + struct fsl_easrc_ctx_priv *ctx_priv = pair->private; + struct fsl_asrc *easrc = pair->asrc; + struct fsl_easrc_priv *easrc_priv = easrc->private; + unsigned int frac_bits; + + ctx_priv->ratio_mod += val; + + switch (easrc_priv->rs_num_taps) { + case EASRC_RS_32_TAPS: + /* integer bits = 5; */ + frac_bits = 39; + break; + case EASRC_RS_64_TAPS: + /* integer bits = 6; */ + frac_bits = 38; + break; + case EASRC_RS_128_TAPS: + /* integer bits = 7; */ + frac_bits = 37; + break; + default: + return -EINVAL; + } + + val <<= (frac_bits - 31); + regmap_write(easrc->regmap, REG_EASRC_RUC(pair->index), EASRC_RSUC_RS_RM(val)); + + return 0; +} + +static int fsl_easrc_m2m_get_cap(struct fsl_asrc_m2m_cap *cap) +{ + cap->fmt_in = FSL_EASRC_FORMATS; + cap->fmt_out = FSL_EASRC_FORMATS | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; + cap->rate_in = SNDRV_PCM_RATE_8000_768000; + cap->rate_out = SNDRV_PCM_RATE_8000_768000; + cap->chan_min = 1; + cap->chan_max = 32; + return 0; +} + static const struct of_device_id fsl_easrc_dt_ids[] = { { .compatible = "fsl,imx8mn-easrc",}, {} @@ -1926,6 +2142,16 @@ static int fsl_easrc_probe(struct platform_device *pdev) easrc->release_pair = fsl_easrc_release_context; easrc->get_fifo_addr = fsl_easrc_get_fifo_addr; easrc->pair_priv_size = sizeof(struct fsl_easrc_ctx_priv); + easrc->m2m_prepare = fsl_easrc_m2m_prepare; + easrc->m2m_start = fsl_easrc_m2m_start; + easrc->m2m_stop = fsl_easrc_m2m_stop; + easrc->get_output_fifo_size = fsl_easrc_get_output_fifo_size; + easrc->m2m_calc_out_len = fsl_easrc_m2m_calc_out_len; + easrc->m2m_get_maxburst = fsl_easrc_m2m_get_maxburst; + easrc->m2m_pair_suspend = fsl_easrc_m2m_pair_suspend; + easrc->m2m_pair_resume = fsl_easrc_m2m_pair_resume; + easrc->m2m_set_ratio_mod = fsl_easrc_m2m_set_ratio_mod; + easrc->m2m_get_cap = fsl_easrc_m2m_get_cap;
easrc_priv->rs_num_taps = EASRC_RS_32_TAPS; easrc_priv->const_coeff = 0x3FF0000000000000; diff --git a/sound/soc/fsl/fsl_easrc.h b/sound/soc/fsl/fsl_easrc.h index 7c70dac52713..c9f770862662 100644 --- a/sound/soc/fsl/fsl_easrc.h +++ b/sound/soc/fsl/fsl_easrc.h @@ -601,6 +601,8 @@ struct fsl_easrc_slot { * @out_missed_sample: sample missed in output * @st1_addexp: exponent added for stage1 * @st2_addexp: exponent added for stage2 + * @ratio_mod: update ratio + * @in_filled_len: input filled length */ struct fsl_easrc_ctx_priv { struct fsl_easrc_io_params in_params; @@ -618,6 +620,8 @@ struct fsl_easrc_ctx_priv { int out_missed_sample; int st1_addexp; int st2_addexp; + int ratio_mod; + unsigned int in_filled_len; };
/**