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ASoC: ti: davinci-mcasp: Support for auxclk-fs-ratio

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When McASP is bus master and it's AUXCLK clock is not static, but it is
a multiple of the frame sync the constraint rules should take it account
when validating possible stream formats.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-06-11 15:29:41 +03:00 committed by Mark Brown
parent b7e47f48f1
commit 764958f2b5
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 44 additions and 8 deletions
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52
sound/soc/ti/davinci-mcasp.c
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@ -100,6 +100,7 @@ struct davinci_mcasp {
int sysclk_freq;
bool bclk_master;
u32 auxclk_fs_ratio;
unsigned long pdir; /* Pin direction bitfield */
@ -1064,13 +1065,13 @@ static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
}
static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
unsigned int sysclk_freq,
unsigned int bclk_freq, bool set)
{
int error_ppm;
unsigned int sysclk_freq = mcasp->sysclk_freq;
u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG);
int div = sysclk_freq / bclk_freq;
int rem = sysclk_freq % bclk_freq;
int error_ppm;
int aux_div = 1;
if (div > (ACLKXDIV_MASK + 1)) {
@ -1175,7 +1176,8 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
if (mcasp->slot_width)
sbits = mcasp->slot_width;
davinci_mcasp_calc_clk_div(mcasp, rate * sbits * slots, true);
davinci_mcasp_calc_clk_div(mcasp, mcasp->sysclk_freq,
rate * sbits * slots, true);
}
ret = mcasp_common_hw_param(mcasp, substream->stream,
@ -1282,12 +1284,19 @@ static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
uint bclk_freq = sbits*slots*
davinci_mcasp_dai_rates[i];
uint bclk_freq = sbits * slots *
davinci_mcasp_dai_rates[i];
unsigned int sysclk_freq;
int ppm;
ppm = davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq,
false);
if (rd->mcasp->auxclk_fs_ratio)
sysclk_freq = davinci_mcasp_dai_rates[i] *
rd->mcasp->auxclk_fs_ratio;
else
sysclk_freq = rd->mcasp->sysclk_freq;
ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
bclk_freq, false);
if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
if (range.empty) {
range.min = davinci_mcasp_dai_rates[i];
@ -1321,12 +1330,19 @@ static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
if (snd_mask_test(fmt, i)) {
uint sbits = snd_pcm_format_width(i);
unsigned int sysclk_freq;
int ppm;
if (rd->mcasp->auxclk_fs_ratio)
sysclk_freq = rate *
rd->mcasp->auxclk_fs_ratio;
else
sysclk_freq = rd->mcasp->sysclk_freq;
if (rd->mcasp->slot_width)
sbits = rd->mcasp->slot_width;
ppm = davinci_mcasp_calc_clk_div(rd->mcasp,
ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
sbits * slots * rate,
false);
if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
@ -1991,6 +2007,22 @@ static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp)
}
#endif /* CONFIG_GPIOLIB */
static int davinci_mcasp_get_dt_params(struct davinci_mcasp *mcasp)
{
struct device_node *np = mcasp->dev->of_node;
int ret;
u32 val;
if (!np)
return 0;
ret = of_property_read_u32(np, "auxclk-fs-ratio", &val);
if (ret >= 0)
mcasp->auxclk_fs_ratio = val;
return 0;
}
static int davinci_mcasp_probe(struct platform_device *pdev)
{
struct snd_dmaengine_dai_dma_data *dma_data;
@ -2224,6 +2256,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
if (ret)
goto err;
ret = davinci_mcasp_get_dt_params(mcasp);
if (ret)
return -EINVAL;
ret = devm_snd_soc_register_component(&pdev->dev,
&davinci_mcasp_component,
&davinci_mcasp_dai[pdata->op_mode], 1);