ALSA: hdspm - Work around broken DDS value on PCI RME MADI
On PCI RME MADI cards, the PLL register does not contain the proper value, so the calculated system_sample_rate is wrong. In this case, we simply return the cached rate from struct hdspm. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -1988,6 +1988,13 @@ static int hdspm_get_system_sample_rate(struct hdspm *hdspm)
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period = hdspm_read(hdspm, HDSPM_RD_PLL_FREQ);
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period = hdspm_read(hdspm, HDSPM_RD_PLL_FREQ);
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rate = hdspm_calc_dds_value(hdspm, period);
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rate = hdspm_calc_dds_value(hdspm, period);
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if (rate > 207000) {
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/* Unreasonable high sample rate as seen on PCI MADI cards.
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* Use the cached value instead.
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*/
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rate = hdspm->system_sample_rate;
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}
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return rate;
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return rate;
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}
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}
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