From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- sound/pci/hda/hda_bind.c | 273 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 273 insertions(+) create mode 100644 sound/pci/hda/hda_bind.c (limited to 'sound/pci/hda/hda_bind.c') diff --git a/sound/pci/hda/hda_bind.c b/sound/pci/hda/hda_bind.c new file mode 100644 index 000000000..00aa31c5f --- /dev/null +++ b/sound/pci/hda/hda_bind.c @@ -0,0 +1,273 @@ +/* + * HD-audio codec driver binding + * Copyright (c) Takashi Iwai + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "hda_codec.h" +#include "hda_local.h" + +/* + * find a matching codec preset + */ +static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv) +{ + struct hda_codec *codec = container_of(dev, struct hda_codec, core); + struct hda_codec_driver *driver = + container_of(drv, struct hda_codec_driver, core); + const struct hda_codec_preset *preset; + /* check probe_id instead of vendor_id if set */ + u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id; + + for (preset = driver->preset; preset->id; preset++) { + u32 mask = preset->mask; + + if (preset->afg && preset->afg != codec->core.afg) + continue; + if (preset->mfg && preset->mfg != codec->core.mfg) + continue; + if (!mask) + mask = ~0; + if (preset->id == (id & mask) && + (!preset->rev || preset->rev == codec->core.revision_id)) { + codec->preset = preset; + return 1; + } + } + return 0; +} + +/* process an unsolicited event */ +static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev) +{ + struct hda_codec *codec = container_of(dev, struct hda_codec, core); + + if (codec->patch_ops.unsol_event) + codec->patch_ops.unsol_event(codec, ev); +} + +/* reset the codec name from the preset */ +static int codec_refresh_name(struct hda_codec *codec, const char *name) +{ + if (name) { + kfree(codec->core.chip_name); + codec->core.chip_name = kstrdup(name, GFP_KERNEL); + } + return codec->core.chip_name ? 0 : -ENOMEM; +} + +static int hda_codec_driver_probe(struct device *dev) +{ + struct hda_codec *codec = dev_to_hda_codec(dev); + struct module *owner = dev->driver->owner; + int err; + + if (WARN_ON(!codec->preset)) + return -EINVAL; + + err = codec_refresh_name(codec, codec->preset->name); + if (err < 0) + goto error; + err = snd_hdac_regmap_init(&codec->core); + if (err < 0) + goto error; + + if (!try_module_get(owner)) { + err = -EINVAL; + goto error; + } + + err = codec->preset->patch(codec); + if (err < 0) + goto error_module; + + err = snd_hda_codec_build_pcms(codec); + if (err < 0) + goto error_module; + err = snd_hda_codec_build_controls(codec); + if (err < 0) + goto error_module; + if (codec->card->registered) { + err = snd_card_register(codec->card); + if (err < 0) + goto error_module; + snd_hda_codec_register(codec); + } + + codec->core.lazy_cache = true; + return 0; + + error_module: + module_put(owner); + + error: + snd_hda_codec_cleanup_for_unbind(codec); + return err; +} + +static int hda_codec_driver_remove(struct device *dev) +{ + struct hda_codec *codec = dev_to_hda_codec(dev); + + if (codec->patch_ops.free) + codec->patch_ops.free(codec); + snd_hda_codec_cleanup_for_unbind(codec); + module_put(dev->driver->owner); + return 0; +} + +static void hda_codec_driver_shutdown(struct device *dev) +{ + struct hda_codec *codec = dev_to_hda_codec(dev); + + if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify) + codec->patch_ops.reboot_notify(codec); +} + +int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name, + struct module *owner) +{ + drv->core.driver.name = name; + drv->core.driver.owner = owner; + drv->core.driver.bus = &snd_hda_bus_type; + drv->core.driver.probe = hda_codec_driver_probe; + drv->core.driver.remove = hda_codec_driver_remove; + drv->core.driver.shutdown = hda_codec_driver_shutdown; + drv->core.driver.pm = &hda_codec_driver_pm; + drv->core.type = HDA_DEV_LEGACY; + drv->core.match = hda_codec_match; + drv->core.unsol_event = hda_codec_unsol_event; + return driver_register(&drv->core.driver); +} +EXPORT_SYMBOL_GPL(__hda_codec_driver_register); + +void hda_codec_driver_unregister(struct hda_codec_driver *drv) +{ + driver_unregister(&drv->core.driver); +} +EXPORT_SYMBOL_GPL(hda_codec_driver_unregister); + +static inline bool codec_probed(struct hda_codec *codec) +{ + return device_attach(hda_codec_dev(codec)) > 0 && codec->preset; +} + +/* try to auto-load and bind the codec module */ +static void codec_bind_module(struct hda_codec *codec) +{ +#ifdef MODULE + request_module("snd-hda-codec-id:%08x", codec->core.vendor_id); + if (codec_probed(codec)) + return; + request_module("snd-hda-codec-id:%04x*", + (codec->core.vendor_id >> 16) & 0xffff); + if (codec_probed(codec)) + return; +#endif +} + +#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) +/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */ +static bool is_likely_hdmi_codec(struct hda_codec *codec) +{ + hda_nid_t nid; + + for_each_hda_codec_node(nid, codec) { + unsigned int wcaps = get_wcaps(codec, nid); + switch (get_wcaps_type(wcaps)) { + case AC_WID_AUD_IN: + return false; /* HDMI parser supports only HDMI out */ + case AC_WID_AUD_OUT: + if (!(wcaps & AC_WCAP_DIGITAL)) + return false; + break; + } + } + return true; +} +#else +/* no HDMI codec parser support */ +#define is_likely_hdmi_codec(codec) false +#endif /* CONFIG_SND_HDA_CODEC_HDMI */ + +static int codec_bind_generic(struct hda_codec *codec) +{ + if (codec->probe_id) + return -ENODEV; + + if (is_likely_hdmi_codec(codec)) { + codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI; +#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI) + request_module("snd-hda-codec-hdmi"); +#endif + if (codec_probed(codec)) + return 0; + } + + codec->probe_id = HDA_CODEC_ID_GENERIC; +#if IS_MODULE(CONFIG_SND_HDA_GENERIC) + request_module("snd-hda-codec-generic"); +#endif + if (codec_probed(codec)) + return 0; + return -ENODEV; +} + +#if IS_ENABLED(CONFIG_SND_HDA_GENERIC) +#define is_generic_config(codec) \ + (codec->modelname && !strcmp(codec->modelname, "generic")) +#else +#define is_generic_config(codec) 0 +#endif + +/** + * snd_hda_codec_configure - (Re-)configure the HD-audio codec + * @codec: the HDA codec + * + * Start parsing of the given codec tree and (re-)initialize the whole + * patch instance. + * + * Returns 0 if successful or a negative error code. + */ +int snd_hda_codec_configure(struct hda_codec *codec) +{ + int err; + + if (is_generic_config(codec)) + codec->probe_id = HDA_CODEC_ID_GENERIC; + else + codec->probe_id = 0; + + err = snd_hdac_device_register(&codec->core); + if (err < 0) + return err; + + if (!codec->preset) + codec_bind_module(codec); + if (!codec->preset) { + err = codec_bind_generic(codec); + if (err < 0) { + codec_err(codec, "Unable to bind the codec\n"); + goto error; + } + } + + /* audio codec should override the mixer name */ + if (codec->core.afg || !*codec->card->mixername) + snprintf(codec->card->mixername, + sizeof(codec->card->mixername), "%s %s", + codec->core.vendor_name, codec->core.chip_name); + return 0; + + error: + snd_hdac_device_unregister(&codec->core); + return err; +} +EXPORT_SYMBOL_GPL(snd_hda_codec_configure); -- cgit v1.2.3