[PATCH 5.12 010/296] ALSA: usb-audio: scarlett2: Improve driver startup messages

Greg Kroah-Hartman
2021-05-31T15:56:02Z

From: Geoffrey D. Bennett <g@b4.vu>

commit 265d1a90e4fb6d3264d8122fbd10760e5e733be6 upstream.

Add separate init function to call the existing controls_create
function so a custom error can be displayed if initialisation fails.

Use info level instead of error for notifications.

Display the VID/PID so device_setup is targeted to the right device.

Display "enabled" message to easily confirm that the driver is loaded.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/b5d140c65f640faf2427e085fbbc0297b32e5fce.1621584566.git.g@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/mixer_quirks.c | 2 -
sound/usb/mixer_scarlett_gen2.c | 79 +++++++++++++++++++++++++---------------
sound/usb/mixer_scarlett_gen2.h | 2 -
3 files changed, 52 insertions(+), 31 deletions(-)

--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -3017,7 +3017,7 @@ int snd_usb_mixer_apply_create_quirk(str
case USB_ID(0x1235, 0x8203): /* Focusrite Scarlett 6i6 2nd Gen */
case USB_ID(0x1235, 0x8204): /* Focusrite Scarlett 18i8 2nd Gen */
case USB_ID(0x1235, 0x8201): /* Focusrite Scarlett 18i20 2nd Gen */
- err = snd_scarlett_gen2_controls_create(mixer);
+ err = snd_scarlett_gen2_init(mixer);
break;

case USB_ID(0x041e, 0x323b): /* Creative Sound Blaster E1 */
--- a/sound/usb/mixer_scarlett_gen2.c
+++ b/sound/usb/mixer_scarlett_gen2.c
@@ -1997,38 +1997,11 @@ static int scarlett2_mixer_status_create
return usb_submit_urb(mixer->urb, GFP_KERNEL);
}

-/* Entry point */
-int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer)
+int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer,
+ const struct scarlett2_device_info *info)
{
- const struct scarlett2_device_info *info;
int err;

- /* only use UAC_VERSION_2 */
- if (!mixer->protocol)
- return 0;
-
- switch (mixer->chip->usb_id) {
- case USB_ID(0x1235, 0x8203):
- info = &s6i6_gen2_info;
- break;
- case USB_ID(0x1235, 0x8204):
- info = &s18i8_gen2_info;
- break;
- case USB_ID(0x1235, 0x8201):
- info = &s18i20_gen2_info;
- break;
- default: /* device not (yet) supported */
- return -EINVAL;
- }
-
- if (!(mixer->chip->setup & SCARLETT2_ENABLE)) {
- usb_audio_err(mixer->chip,
- "Focusrite Scarlett Gen 2 Mixer Driver disabled; "
- "use options snd_usb_audio device_setup=1 "
- "to enable and report any issues to g@b4.vu");
- return 0;
- }
-
/* Initialise private data, routing, sequence number */
err = scarlett2_init_private(mixer, info);
if (err < 0)
@@ -2073,3 +2046,51 @@ int snd_scarlett_gen2_controls_create(st

return 0;
}
+
+int snd_scarlett_gen2_init(struct usb_mixer_interface *mixer)
+{
+ struct snd_usb_audio *chip = mixer->chip;
+ const struct scarlett2_device_info *info;
+ int err;
+
+ /* only use UAC_VERSION_2 */
+ if (!mixer->protocol)
+ return 0;
+
+ switch (chip->usb_id) {
+ case USB_ID(0x1235, 0x8203):
+ info = &s6i6_gen2_info;
+ break;
+ case USB_ID(0x1235, 0x8204):
+ info = &s18i8_gen2_info;
+ break;
+ case USB_ID(0x1235, 0x8201):
+ info = &s18i20_gen2_info;
+ break;
+ default: /* device not (yet) supported */
+ return -EINVAL;
+ }
+
+ if (!(chip->setup & SCARLETT2_ENABLE)) {
+ usb_audio_info(chip,
+ "Focusrite Scarlett Gen 2 Mixer Driver disabled; "
+ "use options snd_usb_audio vid=0x%04x pid=0x%04x "
+ "device_setup=1 to enable and report any issues "
+ "to g@b4.vu",
+ USB_ID_VENDOR(chip->usb_id),
+ USB_ID_PRODUCT(chip->usb_id));
+ return 0;
+ }
+
+ usb_audio_info(chip,
+ "Focusrite Scarlett Gen 2 Mixer Driver enabled pid=0x%04x",
+ USB_ID_PRODUCT(chip->usb_id));
+
+ err = snd_scarlett_gen2_controls_create(mixer, info);
+ if (err < 0)
+ usb_audio_err(mixer->chip,
+ "Error initialising Scarlett Mixer Driver: %d",
+ err);
+
+ return err;
+}
--- a/sound/usb/mixer_scarlett_gen2.h
+++ b/sound/usb/mixer_scarlett_gen2.h
@@ -2,6 +2,6 @@
#ifndef __USB_MIXER_SCARLETT_GEN2_H
#define __USB_MIXER_SCARLETT_GEN2_H

-int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer);
+int snd_scarlett_gen2_init(struct usb_mixer_interface *mixer);

#endif /* __USB_MIXER_SCARLETT_GEN2_H */