ALSA: usb-audio: Move tx_length quirk handling to quirk_flags

There is another quirk for the transfer, and that's currently specific
to Zoom R16/24, handled in create_standard_audio_quirk().  Let's move
this also to the new quirk_flags.

Link: https://lore.kernel.org/r/20210729073855.19043-5-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/endpoint.c

@@ -240,6 +240,11 @@ static void retire_inbound_urb(struct snd_usb_endpoint *ep,
 	call_retire_callback(ep, urb);
 }
 
+static inline bool has_tx_length_quirk(struct snd_usb_audio *chip)
+{
+	return chip->quirk_flags & QUIRK_FLAG_TX_LENGTH;
+}
+
 static void prepare_silent_urb(struct snd_usb_endpoint *ep,
 			       struct snd_urb_ctx *ctx)
 {
@@ -250,7 +255,7 @@ static void prepare_silent_urb(struct snd_usb_endpoint *ep,
 	int i;
 
 	/* For tx_length_quirk, put packet length at start of packet */
-	if (ep->chip->tx_length_quirk)
+	if (has_tx_length_quirk(ep->chip))
 		extra = sizeof(packet_length);
 
 	for (i = 0; i < ctx->packets; ++i) {
@@ -952,7 +957,7 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep)
 	unsigned int max_urbs, i;
 	const struct audioformat *fmt = ep->cur_audiofmt;
 	int frame_bits = ep->cur_frame_bytes * 8;
-	int tx_length_quirk = (chip->tx_length_quirk &&
+	int tx_length_quirk = (has_tx_length_quirk(chip) &&
 			       usb_pipeout(ep->pipe));
 
 	usb_audio_dbg(chip, "Setting params for data EP 0x%x, pipe 0x%x\n",

sound/usb/quirks.c

@@ -95,9 +95,6 @@ static int create_standard_audio_quirk(struct snd_usb_audio *chip,
 	struct usb_interface_descriptor *altsd;
 	int err;
 
-	if (chip->usb_id == USB_ID(0x1686, 0x00dd)) /* Zoom R16/24 */
-		chip->tx_length_quirk = 1;
-
 	alts = &iface->altsetting[0];
 	altsd = get_iface_desc(alts);
 	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
@@ -1909,6 +1906,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
 		   QUIRK_FLAG_SHARE_MEDIA_DEVICE | QUIRK_FLAG_ALIGN_TRANSFER),
 	DEVICE_FLG(0x1395, 0x740a, /* Sennheiser DECT */
 		   QUIRK_FLAG_GET_SAMPLE_RATE),
+	DEVICE_FLG(0x1686, 0x00dd, /* Zoom R16/24 */
+		   QUIRK_FLAG_TX_LENGTH),
 	DEVICE_FLG(0x1901, 0x0191, /* GE B850V3 CP2114 audio interface */
 		   QUIRK_FLAG_GET_SAMPLE_RATE),
 	DEVICE_FLG(0x2040, 0x7200, /* Hauppauge HVR-950Q */

sound/usb/stream.c

@@ -90,7 +90,7 @@ static void snd_usb_init_substream(struct snd_usb_stream *as,
 	subs->direction = stream;
 	subs->dev = as->chip->dev;
 	subs->txfr_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_ALIGN_TRANSFER);
-	subs->tx_length_quirk = as->chip->tx_length_quirk;
+	subs->tx_length_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_TX_LENGTH);
 	subs->speed = snd_usb_get_speed(subs->dev);
 	subs->pkt_offset_adj = 0;
 	subs->stream_offset_adj = 0;

sound/usb/usbaudio.h

@@ -35,7 +35,6 @@ struct snd_usb_audio {
 	atomic_t usage_count;
 	wait_queue_head_t shutdown_wait;
 	unsigned int quirk_flags;
-	unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
 	unsigned int need_delayed_register:1; /* warn for delayed registration */
 	unsigned int playback_first:1;	/* for implicit fb: don't wait for the first capture URBs */
 	int num_interfaces;
@@ -138,10 +137,13 @@ extern bool snd_usb_skip_validation;
  * QUIRK_FLAG_ALIGN_TRANSFER:
  *  Allow alignment on audio sub-slot (channel samples) rather than on audio
  *  slots (audio frames)
+ * QUIRK_TX_LENGTH:
+ *  Add length specifier to transfers
  */
 
 #define QUIRK_FLAG_GET_SAMPLE_RATE	(1U << 0)
 #define QUIRK_FLAG_SHARE_MEDIA_DEVICE	(1U << 1)
 #define QUIRK_FLAG_ALIGN_TRANSFER	(1U << 2)
+#define QUIRK_FLAG_TX_LENGTH		(1U << 3)
 
 #endif /* __USBAUDIO_H */