diff options
| -rw-r--r-- | include/sound/hdaudio.h | 14 | ||||
| -rw-r--r-- | sound/hda/hda_bus_type.c | 41 |
2 files changed, 55 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 64fff4db81bb..4caf1fde8a4f 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -28,6 +28,16 @@ struct hdac_widget_tree; extern struct bus_type snd_hda_bus_type; /* + * HDA device table + */ +struct hda_device_id { + __u32 vendor_id; + __u32 rev_id; + const char *name; + unsigned long driver_data; +}; + +/* * generic arrays */ struct snd_array { @@ -171,12 +181,16 @@ static inline void snd_hdac_power_down_pm(struct hdac_device *codec) {} struct hdac_driver { struct device_driver driver; int type; + const struct hda_device_id *id_table; int (*match)(struct hdac_device *dev, struct hdac_driver *drv); void (*unsol_event)(struct hdac_device *dev, unsigned int event); }; #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver) +const struct hda_device_id * +hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv); + /* * Bus verb operators */ diff --git a/sound/hda/hda_bus_type.c b/sound/hda/hda_bus_type.c index 519914a12e8a..89c2711baaaf 100644 --- a/sound/hda/hda_bus_type.c +++ b/sound/hda/hda_bus_type.c @@ -10,6 +10,40 @@ MODULE_DESCRIPTION("HD-audio bus"); MODULE_LICENSE("GPL"); +/** + * hdac_get_device_id - gets the hdac device id entry + * @hdev: HD-audio core device + * @drv: HD-audio codec driver + * + * Compares the hdac device vendor_id and revision_id to the hdac_device + * driver id_table and returns the matching device id entry. + */ +const struct hda_device_id * +hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv) +{ + if (drv->id_table) { + const struct hda_device_id *id = drv->id_table; + + while (id->vendor_id) { + if (hdev->vendor_id == id->vendor_id && + (!id->rev_id || id->rev_id == hdev->revision_id)) + return id; + id++; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(hdac_get_device_id); + +static int hdac_codec_match(struct hdac_device *dev, struct hdac_driver *drv) +{ + if (hdac_get_device_id(dev, drv)) + return 1; + else + return 0; +} + static int hda_bus_match(struct device *dev, struct device_driver *drv) { struct hdac_device *hdev = dev_to_hdac_dev(dev); @@ -17,8 +51,15 @@ static int hda_bus_match(struct device *dev, struct device_driver *drv) if (hdev->type != hdrv->type) return 0; + + /* + * if driver provided a match function use that otherwise we will + * use hdac_codec_match function + */ if (hdrv->match) return hdrv->match(hdev, hdrv); + else + return hdac_codec_match(hdev, hdrv); return 1; } |