ALSA: usb-audio: Pass snd_usb_audio object to quirk functions

A preliminary patch for the later big change.  Just a minor code
refactoring.
Tested-by: NKeith Milner <kamilner@superlative.org>
Tested-by: NDylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-19-tiwai@suse.deSigned-off-by: NTakashi Iwai <tiwai@suse.de>

sound/usb/clock.c

@@ -658,9 +658,9 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
 	 * interface is active. */
 	if (rate != prev_rate) {
 		usb_set_interface(dev, iface, 0);
-		snd_usb_set_interface_quirk(dev);
+		snd_usb_set_interface_quirk(chip);
 		usb_set_interface(dev, iface, fmt->altsetting);
-		snd_usb_set_interface_quirk(dev);
+		snd_usb_set_interface_quirk(chip);
 	}
 
 validation:

sound/usb/pcm.c

@@ -553,6 +553,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
 {
 	struct usb_device *dev = subs->dev;
 	struct usb_host_interface *alts;
+	struct snd_usb_audio *chip = subs->stream->chip;
 	int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
 	unsigned int ep;
 	int err;
@@ -569,7 +570,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
 	if (!alts)
 		return 0;
 
-	subs->sync_endpoint = snd_usb_get_endpoint(subs->stream->chip, ep);
+	subs->sync_endpoint = snd_usb_get_endpoint(chip, ep);
 	if (!subs->sync_endpoint) {
 		if (is_playback &&
 		    (fmt->ep_attr & USB_ENDPOINT_SYNCTYPE) == USB_ENDPOINT_SYNC_NONE)
@@ -596,7 +597,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
 		dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
 			subs->sync_endpoint->iface,
 			subs->sync_endpoint->altsetting);
-		snd_usb_set_interface_quirk(dev);
+		snd_usb_set_interface_quirk(chip);
 	}
 
 	return 0;
@@ -608,6 +609,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 {
 	struct usb_device *dev = subs->dev;
+	struct snd_usb_audio *chip = subs->stream->chip;
 	struct usb_host_interface *alts;
 	struct usb_interface *iface;
 	struct snd_usb_endpoint *ep;
@@ -625,7 +627,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 
 	/* shared EP with implicit fb */
 	if (fmt->implicit_fb && !subs->need_setup_fmt) {
-		ep = snd_usb_get_endpoint(subs->stream->chip, fmt->endpoint);
+		ep = snd_usb_get_endpoint(chip, fmt->endpoint);
 		if (ep && ep->use_count > 0)
 			goto add_data_ep;
 	}
@@ -648,7 +650,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 
 	/* set interface */
 	if (iface->cur_altsetting != alts) {
-		err = snd_usb_select_mode_quirk(subs, fmt);
+		err = snd_usb_select_mode_quirk(chip, fmt);
 		if (err < 0)
 			return -EIO;
 
@@ -661,7 +663,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 		}
 		dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
 			fmt->iface, fmt->altsetting);
-		snd_usb_set_interface_quirk(dev);
+		snd_usb_set_interface_quirk(chip);
 	}
 
 	subs->need_setup_ep = true;
@@ -669,8 +671,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
  add_data_ep:
 	subs->interface = fmt->iface;
 	subs->altset_idx = fmt->altset_idx;
-	subs->data_endpoint = snd_usb_get_endpoint(subs->stream->chip,
-						   fmt->endpoint);
+	subs->data_endpoint = snd_usb_get_endpoint(chip, fmt->endpoint);
 	if (!subs->data_endpoint)
 		return -EINVAL;
 	subs->data_endpoint->iface = fmt->iface;
@@ -681,7 +682,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 		return err;
 
 	if (subs->need_setup_ep) {
-		err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
+		err = snd_usb_init_pitch(chip, fmt->iface, alts, fmt);
 		if (err < 0)
 			return err;
 	}

sound/usb/quirks.c

@@ -1553,13 +1553,13 @@ static bool is_itf_usb_dsd_dac(unsigned int id)
 	return false;
 }
 
-int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
+int snd_usb_select_mode_quirk(struct snd_usb_audio *chip,
 			      struct audioformat *fmt)
 {
-	struct usb_device *dev = subs->dev;
+	struct usb_device *dev = chip->dev;
 	int err;
 
-	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
+	if (is_itf_usb_dsd_dac(chip->usb_id)) {
 		/* First switch to alt set 0, otherwise the mode switch cmd
 		 * will not be accepted by the DAC
 		 */
@@ -1622,10 +1622,8 @@ void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
 		ep->tenor_fb_quirk = 1;
 }
 
-void snd_usb_set_interface_quirk(struct usb_device *dev)
+void snd_usb_set_interface_quirk(struct snd_usb_audio *chip)
 {
-	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
-
 	if (!chip)
 		return;
 	/*

sound/usb/quirks.h

@@ -35,12 +35,12 @@ int snd_usb_is_big_endian_format(struct snd_usb_audio *chip,
 
 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep);
 
-void snd_usb_set_interface_quirk(struct usb_device *dev);
+void snd_usb_set_interface_quirk(struct snd_usb_audio *chip);
 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
 			   __u8 request, __u8 requesttype, __u16 value,
 			   __u16 index, void *data, __u16 size);
 
-int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
+int snd_usb_select_mode_quirk(struct snd_usb_audio *chip,
 			      struct audioformat *fmt);
 
 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,