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1// SPDX-License-Identifier: MIT2/*3 * Copyright (C) 2019 NVIDIA Corporation4 */5 6#include <linux/bug.h>7 8#include <sound/hda_verbs.h>9 10#include "hda.h"11 12void 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 else19 fmt->pcm = true;20 21 if (format & AC_FMT_BASE_44K)22 fmt->sample_rate = 44100;23 else24 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