ALSA: hda - Allow driver to add vendor-specific verbs for regmap
Codecs may have own vendor-specific verbs, and we need to allow each driver to give such verbs for cached accesses. Here a verb can be put into a single array and looked through it at readable and writeable callbacks. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -11,7 +11,8 @@
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int snd_hdac_regmap_init(struct hdac_device *codec);
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void snd_hdac_regmap_exit(struct hdac_device *codec);
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int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
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unsigned int verb);
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int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
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unsigned int *val);
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int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
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@ -75,6 +75,7 @@ struct hdac_device {
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/* regmap */
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struct regmap *regmap;
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struct snd_array vendor_verbs;
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bool lazy_cache:1; /* don't wake up for writes */
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bool caps_overwriting:1; /* caps overwrite being in process */
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};
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@ -60,6 +60,13 @@ static bool hda_writeable_reg(struct device *dev, unsigned int reg)
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{
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struct hdac_device *codec = dev_to_hdac_dev(dev);
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unsigned int verb = get_verb(reg);
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int i;
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for (i = 0; i < codec->vendor_verbs.used; i++) {
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unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
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if (verb == *v)
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return true;
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}
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if (codec->caps_overwriting)
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return true;
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@ -200,6 +207,7 @@ int snd_hdac_regmap_init(struct hdac_device *codec)
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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codec->regmap = regmap;
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snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
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@ -209,10 +217,30 @@ void snd_hdac_regmap_exit(struct hdac_device *codec)
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if (codec->regmap) {
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regmap_exit(codec->regmap);
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codec->regmap = NULL;
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snd_array_free(&codec->vendor_verbs);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
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/**
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* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
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* @codec: the codec object
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* @verb: verb to allow accessing via regmap
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*
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* Returns zero for success or a negative error code.
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*/
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int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
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unsigned int verb)
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{
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unsigned int *p = snd_array_new(&codec->vendor_verbs);
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if (!p)
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return -ENOMEM;
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*p = verb;
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
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/*
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* helper functions
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*/
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