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ASoC: Intel: sof_rt5682: use RT5682S_PLL1 if needed

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When 96KHz sample rate is used, and MCLK is 24.576MHz, we will need
pll_in = 24576000 and pll_out = 49152000 which is not supported by
RT5682S_PLL2. Use RT5682S_PLL1 in this case.
We don't test sample rate because RT5682S_PLL2 doesn't support 24.576MHz
input and in the MCLK = 24.576MHz, sample rate = 48KHz case, i.e.
pll_in == pll_out, PLL will not be used at all.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240411220347.131267-13-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bard Liao 2024-04-11 17:03:47 -05:00 committed by Mark Brown
parent ca571e5a2e
commit dcc2cd8000
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 13 additions and 2 deletions

15
sound/soc/intel/boards/sof_rt5682.c

@ -340,8 +340,19 @@ static int sof_rt5682_hw_params(struct snd_pcm_substream *substream,
clk_id = RT5682_SCLK_S_PLL1;
break;
case CODEC_RT5682S:
pll_id = RT5682S_PLL2;
clk_id = RT5682S_SCLK_S_PLL2;
/*
* For MCLK = 24.576MHz and sample rate = 96KHz case, use PLL1 We don't test
* pll_out or params_rate() here since rt5682s PLL2 doesn't support 24.576MHz
* input, so we have no choice but to use PLL1. Besides, we will not use PLL at
* all if pll_in == pll_out. ex, MCLK = 24.576Mhz and sample rate = 48KHz
*/
if (pll_in == 24576000) {
pll_id = RT5682S_PLL1;
clk_id = RT5682S_SCLK_S_PLL1;
} else {
pll_id = RT5682S_PLL2;
clk_id = RT5682S_SCLK_S_PLL2;
}
break;
default:
dev_err(rtd->dev, "invalid codec type %d\n", ctx->codec_type);