From d24f1a090d3f2a5c86a8782afeda71c2d2539966 Mon Sep 17 00:00:00 2001 From: Cezary Rojewski Date: Fri, 17 Nov 2023 13:05:58 +0100 Subject: ALSA: hda: Upgrade stream-format infrastructure Introduce a set of functions that ultimately facilite SDxFMT-related calculations in atomic manner: First, introduce snd_pcm_subformat_width() and snd_pcm_hw_params_bits() helpers that separate the base functionality from the HDAudio-specific one. snd_hdac_format_normalize() - format converter. S20_LE, S24_LE and their unsigned and BE friends are invalid from HDAudio perspective but still can be specified as function argument due to compatibility reasons. snd_hdac_stream_format_bits() - obtain just the bits-per-sample value. Does not ignore subformat and msbits parameters. snd_hdac_stream_format() and snd_hdac_spdif_stream_format() - obtain the SDxFMT value given the audio format parameters. The former is stripped away of spdif-related information. Useful for users that do not care about them. Acked-by: Mark Brown Signed-off-by: Cezary Rojewski Acked-by: Jaroslav Kysela Link: https://lore.kernel.org/r/20231117120610.1755254-5-cezary.rojewski@intel.com Signed-off-by: Takashi Iwai --- sound/hda/hdac_device.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) (limited to 'sound/hda') diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index cde4d5c33771..556bd24f4014 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -13,6 +13,7 @@ #include #include #include +#include #include "local.h" static void setup_fg_nodes(struct hdac_device *codec); @@ -725,6 +726,129 @@ static const struct hda_rate_tbl rate_bits[] = { { 0 } /* terminator */ }; +static snd_pcm_format_t snd_hdac_format_normalize(snd_pcm_format_t format) +{ + switch (format) { + case SNDRV_PCM_FORMAT_S20_LE: + case SNDRV_PCM_FORMAT_S24_LE: + return SNDRV_PCM_FORMAT_S32_LE; + + case SNDRV_PCM_FORMAT_U20_LE: + case SNDRV_PCM_FORMAT_U24_LE: + return SNDRV_PCM_FORMAT_U32_LE; + + case SNDRV_PCM_FORMAT_S20_BE: + case SNDRV_PCM_FORMAT_S24_BE: + return SNDRV_PCM_FORMAT_S32_BE; + + case SNDRV_PCM_FORMAT_U20_BE: + case SNDRV_PCM_FORMAT_U24_BE: + return SNDRV_PCM_FORMAT_U32_BE; + + default: + return format; + } +} + +/** + * snd_hdac_stream_format_bits - obtain bits per sample value. + * @format: the PCM format. + * @subformat: the PCM subformat. + * @maxbits: the maximum bits per sample. + * + * Return: The number of bits per sample. + */ +unsigned int snd_hdac_stream_format_bits(snd_pcm_format_t format, snd_pcm_subformat_t subformat, + unsigned int maxbits) +{ + struct snd_pcm_hw_params params; + unsigned int bits; + + memset(¶ms, 0, sizeof(params)); + + params_set_format(¶ms, snd_hdac_format_normalize(format)); + snd_mask_set(hw_param_mask(¶ms, SNDRV_PCM_HW_PARAM_SUBFORMAT), + (__force unsigned int)subformat); + + bits = snd_pcm_hw_params_bits(¶ms); + if (maxbits) + return min(bits, maxbits); + return bits; +} +EXPORT_SYMBOL_GPL(snd_hdac_stream_format_bits); + +/** + * snd_hdac_stream_format - convert format parameters to SDxFMT value. + * @channels: the number of channels. + * @bits: bits per sample. + * @rate: the sample rate. + * + * Return: The format bitset or zero if invalid. + */ +unsigned int snd_hdac_stream_format(unsigned int channels, unsigned int bits, unsigned int rate) +{ + unsigned int val = 0; + int i; + + for (i = 0; rate_bits[i].hz; i++) { + if (rate_bits[i].hz == rate) { + val = rate_bits[i].hda_fmt; + break; + } + } + + if (!rate_bits[i].hz) + return 0; + + if (channels == 0 || channels > 8) + return 0; + val |= channels - 1; + + switch (bits) { + case 8: + val |= AC_FMT_BITS_8; + break; + case 16: + val |= AC_FMT_BITS_16; + break; + case 20: + val |= AC_FMT_BITS_20; + break; + case 24: + val |= AC_FMT_BITS_24; + break; + case 32: + val |= AC_FMT_BITS_32; + break; + default: + return 0; + } + + return val; +} +EXPORT_SYMBOL_GPL(snd_hdac_stream_format); + +/** + * snd_hdac_spdif_stream_format - convert format parameters to SDxFMT value. + * @channels: the number of channels. + * @bits: bits per sample. + * @rate: the sample rate. + * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant). + * + * Return: The format bitset or zero if invalid. + */ +unsigned int snd_hdac_spdif_stream_format(unsigned int channels, unsigned int bits, + unsigned int rate, unsigned short spdif_ctls) +{ + unsigned int val = snd_hdac_stream_format(channels, bits, rate); + + if (val && spdif_ctls & AC_DIG1_NONAUDIO) + val |= AC_FMT_TYPE_NON_PCM; + + return val; +} +EXPORT_SYMBOL_GPL(snd_hdac_spdif_stream_format); + /** * snd_hdac_calc_stream_format - calculate the format bitset * @rate: the sample rate -- cgit v1.2.3