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| author | Takashi Iwai <tiwai@suse.de> | 2020-11-23 09:53:14 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-11-23 15:12:26 +0100 |
| commit | f6581c0e5d297cc1e0d7eb7c2603097f532e629a (patch) | |
| tree | af46db60939f5b822042db7083f30fe8a9e084cf /sound/usb/card.h | |
| parent | e93e890e16ef5a0605b7cdc52b3bde50d88d7207 (diff) | |
| download | linux-f6581c0e5d297cc1e0d7eb7c2603097f532e629a.tar.bz2 | |
ALSA: usb-audio: Track implicit fb sync endpoint in audioformat list
Instead of parsing and evaluating the sync endpoint and the implicit
feedback mode at each time the audio stream is opened, let's parse it
once at the probe time, as the all needed information can be obtained
statically from the descriptor or from the quirk.
This patch extends audioformat struct to record the sync endpoint,
interface and altsetting as well as the implicit feedback flag, which
are filled at parsing the streams. Then, set_sync_endpoint() is much
simplified just to follow the already parsed data.
Tested-by: Keith Milner <kamilner@superlative.org>
Tested-by: Dylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-9-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/card.h')
| -rw-r--r-- | sound/usb/card.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h index 3cc668f98f43..898a283576df 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -22,6 +22,10 @@ struct audioformat { unsigned char attributes; /* corresponding attributes of cs endpoint */ unsigned char endpoint; /* endpoint */ unsigned char ep_attr; /* endpoint attributes */ + bool implicit_fb; /* implicit feedback endpoint */ + unsigned char sync_ep; /* sync endpoint number */ + unsigned char sync_iface; /* sync EP interface */ + unsigned char sync_altsetting; /* sync EP alternate setting */ unsigned char datainterval; /* log_2 of data packet interval */ unsigned char protocol; /* UAC_VERSION_1/2/3 */ unsigned int maxpacksize; /* max. packet size */ |