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- // SPDX-License-Identifier: MIT
- /*
- * Copyright (C) 2019 NVIDIA Corporation
- */
- #include <linux/bug.h>
- #include <sound/hda_verbs.h>
- #include "hda.h"
- void tegra_hda_parse_format(unsigned int format, struct tegra_hda_format *fmt)
- {
- unsigned int mul, div, bits, channels;
- if (format & AC_FMT_TYPE_NON_PCM)
- fmt->pcm = false;
- else
- fmt->pcm = true;
- if (format & AC_FMT_BASE_44K)
- fmt->sample_rate = 44100;
- else
- fmt->sample_rate = 48000;
- mul = (format & AC_FMT_MULT_MASK) >> AC_FMT_MULT_SHIFT;
- div = (format & AC_FMT_DIV_MASK) >> AC_FMT_DIV_SHIFT;
- fmt->sample_rate *= (mul + 1) / (div + 1);
- switch (format & AC_FMT_BITS_MASK) {
- case AC_FMT_BITS_8:
- fmt->bits = 8;
- break;
- case AC_FMT_BITS_16:
- fmt->bits = 16;
- break;
- case AC_FMT_BITS_20:
- fmt->bits = 20;
- break;
- case AC_FMT_BITS_24:
- fmt->bits = 24;
- break;
- case AC_FMT_BITS_32:
- fmt->bits = 32;
- break;
- default:
- bits = (format & AC_FMT_BITS_MASK) >> AC_FMT_BITS_SHIFT;
- WARN(1, "invalid number of bits: %#x\n", bits);
- fmt->bits = 8;
- break;
- }
- channels = (format & AC_FMT_CHAN_MASK) >> AC_FMT_CHAN_SHIFT;
- /* channels are encoded as n - 1 */
- fmt->channels = channels + 1;
- }
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