Raffaele Recalcati wrote:
> @@ -447,6 +448,24 @@ static int davinci_i2s_hw_params(struct
> snd_pcm_substream *substream,
> 8 - 1);
> + if (dev->i2s_accurate_clock) {
> + clk_div = 256;
> + do {
> + framesize = (freq / (--clk_div)) /
> + params->rate_num *
> + params->rate_den;
> + } while (((framesize < 33) || (framesize > 4095)) &&
> + (clk_div));
> + clk_div--;
> + srgr |= DAVINCI_MCBSP_SRGR_FPER(framesize - 1);
> + } else {
> + /* symmetric waveforms */
> + clk_div = freq / (mcbsp_word_length * 16) /
> + params->rate_num * params->rate_den;
> + srgr |= DAVINCI_MCBSP_SRGR_FPER(mcbsp_word_length *
> + 16 - 1);
> + }
> +
> /* symmetric waveforms */
> clk_div = freq / (mcbsp_word_length * 16) /
> params->rate_num * params->rate_den;
Can you test to see if this works to replace all the above ?
unsigned cycles;
framesize = mcbsp_word_length * 16;
cycles = (freq / params->rate_num) * params->rate_den;
clk_div = cycles / framesize;
if (dev->i2s_accurate_clock) {
framesize = cycles / clk_div;
if (framesize > 4096))
framesize = 4096;
}
srgr |= DAVINCI_MCBSP_SRGR_FPER(framesize - 1);
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