[2/3] ALSA: bebob: delete workaround for protocol version 3

Message ID 20210611035003.26852-3-o-takashi@sakamocchi.jp
State Accepted
Commit 82fb3bf92c0fb6cd471295ba9c774a47c7d64c8c
Headers show
Series
  • ALSA: bebob: remove workarounds for suppressed quirks
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Commit Message

Takashi Sakamoto June 11, 2021, 3:50 a.m.
In a commit c4d860a0d256 ("ALSA: bebob: loosen up severity of checking
continuity for BeBoB v3 quirk"), a workaround was added for the quirk in
BeBoB protocol version 3 against the discontinuity of data block counter.
As long as seeing with sequence replay for media clock recovery, such
quirk disappears.

This commit deletes the workaround.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 sound/firewire/bebob/bebob.c        | 7 -------
 sound/firewire/bebob/bebob.h        | 2 --
 sound/firewire/bebob/bebob_stream.c | 8 --------
 3 files changed, 17 deletions(-)

Patch

diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c
index e7dd112c31c5..25222cc27e43 100644
--- a/sound/firewire/bebob/bebob.c
+++ b/sound/firewire/bebob/bebob.c
@@ -75,7 +75,6 @@  name_device(struct snd_bebob *bebob)
 	u32 hw_id;
 	u32 data[2] = {0};
 	u32 revision;
-	u32 version;
 	int err;
 
 	/* get vendor name from root directory */
@@ -108,12 +107,6 @@  name_device(struct snd_bebob *bebob)
 	if (err < 0)
 		goto end;
 
-	err = snd_bebob_read_quad(bebob->unit, INFO_OFFSET_BEBOB_VERSION,
-				  &version);
-	if (err < 0)
-		goto end;
-	bebob->version = version;
-
 	strcpy(bebob->card->driver, "BeBoB");
 	strcpy(bebob->card->shortname, model);
 	strcpy(bebob->card->mixername, model);
diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h
index edd93699ce1a..fc2b9b36159c 100644
--- a/sound/firewire/bebob/bebob.h
+++ b/sound/firewire/bebob/bebob.h
@@ -109,8 +109,6 @@  struct snd_bebob {
 	/* for M-Audio special devices */
 	void *maudio_special_quirk;
 
-	/* For BeBoB version quirk. */
-	unsigned int version;
 	bool discontinuity_quirk;
 
 	struct amdtp_domain domain;
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 6d47c25654e6..02972b32e170 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
@@ -456,14 +456,6 @@  static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream)
 	}
 
 	if (stream == &bebob->tx_stream) {
-		// BeBoB v3 transfers packets with these qurks:
-		//  - In the beginning of streaming, the value of dbc is
-		//    incremented even if no data blocks are transferred.
-		//  - The value of dbc is reset suddenly.
-		if (bebob->version > 2)
-			bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
-						  CIP_SKIP_DBC_ZERO_CHECK;
-
 		// At high sampling rate, M-Audio special firmware transmits
 		// empty packet with the value of dbc incremented by 8 but the
 		// others are valid to IEC 61883-1.