ALSA: hda - Add api_version to hda_device_id struct

For distinguishing the difference between HDA legacy and ext codec
driver entries, we need to expose the value corresponding to type
field.  This patch adds a new field, api_version, to hda_device_id
struct, so that this information is embedded in modalias string.

Although the information is basically redundant (struct hdac_device
already has type field), the helper that extracts from
MODULE_DEVICE_TABLE() won't take it account except for the exported
table entries themselves.  So we need to put the same information in
the table, too.

Reviewed-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Subhransu S Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 49df61c7afdcb0931023fd51f0462b59683a6cf8..b35bf59a1ecc0fea0c2d3256aef92e6b14ca080f 100644 (file)
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -33,6 +33,7 @@ extern struct bus_type snd_hda_bus_type;
 struct hda_device_id {
        __u32 vendor_id;
        __u32 rev_id;
+       __u8 api_version;
        const char *name;
        unsigned long driver_data;
 };