| 1 | // SPDX-License-Identifier: MIT |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2019 NVIDIA Corporation |
| 4 | */ |
| 5 | |
| 6 | #include <linux/bug.h> |
| 7 | |
| 8 | #include <sound/hda_verbs.h> |
| 9 | |
| 10 | #include "hda.h" |
| 11 | |
| 12 | void tegra_hda_parse_format(unsigned int format, struct tegra_hda_format *fmt) |
| 13 | { |
| 14 | unsigned int mul, div, bits, channels; |
| 15 | |
| 16 | if (format & AC_FMT_TYPE_NON_PCM) |
| 17 | fmt->pcm = false; |
| 18 | else |
| 19 | fmt->pcm = true; |
| 20 | |
| 21 | if (format & AC_FMT_BASE_44K) |
| 22 | fmt->sample_rate = 44100; |
| 23 | else |
| 24 | fmt->sample_rate = 48000; |
| 25 | |
| 26 | mul = (format & AC_FMT_MULT_MASK) >> AC_FMT_MULT_SHIFT; |
| 27 | div = (format & AC_FMT_DIV_MASK) >> AC_FMT_DIV_SHIFT; |
| 28 | |
| 29 | fmt->sample_rate *= (mul + 1) / (div + 1); |
| 30 | |
| 31 | switch (format & AC_FMT_BITS_MASK) { |
| 32 | case AC_FMT_BITS_8: |
| 33 | fmt->bits = 8; |
| 34 | break; |
| 35 | |
| 36 | case AC_FMT_BITS_16: |
| 37 | fmt->bits = 16; |
| 38 | break; |
| 39 | |
| 40 | case AC_FMT_BITS_20: |
| 41 | fmt->bits = 20; |
| 42 | break; |
| 43 | |
| 44 | case AC_FMT_BITS_24: |
| 45 | fmt->bits = 24; |
| 46 | break; |
| 47 | |
| 48 | case AC_FMT_BITS_32: |
| 49 | fmt->bits = 32; |
| 50 | break; |
| 51 | |
| 52 | default: |
| 53 | bits = (format & AC_FMT_BITS_MASK) >> AC_FMT_BITS_SHIFT; |
| 54 | WARN(1, "invalid number of bits: %#x\n", bits); |
| 55 | fmt->bits = 8; |
| 56 | break; |
| 57 | } |
| 58 | |
| 59 | channels = (format & AC_FMT_CHAN_MASK) >> AC_FMT_CHAN_SHIFT; |
| 60 | |
| 61 | /* channels are encoded as n - 1 */ |
| 62 | fmt->channels = channels + 1; |
| 63 | } |
| 64 |