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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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/*
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* simple-card-core.c
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*
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* Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/of.h>
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#include <sound/simple_card_utils.h>
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int asoc_simple_card_parse_daifmt(struct device *dev,
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struct device_node *node,
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struct device_node *codec,
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char *prefix,
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unsigned int *retfmt)
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{
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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int prefix_len = prefix ? strlen(prefix) : 0;
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unsigned int daifmt;
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daifmt = snd_soc_of_parse_daifmt(node, prefix,
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&bitclkmaster, &framemaster);
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daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
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if (prefix_len && !bitclkmaster && !framemaster) {
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/*
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* No dai-link level and master setting was not found from
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* sound node level, revert back to legacy DT parsing and
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* take the settings from codec node.
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*/
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dev_dbg(dev, "Revert to legacy daifmt parsing\n");
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daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
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(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
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} else {
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if (codec == bitclkmaster)
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daifmt |= (codec == framemaster) ?
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SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
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else
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daifmt |= (codec == framemaster) ?
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SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
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}
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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*retfmt = daifmt;
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return 0;
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}
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EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt);
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