ALSA: usb-audio: us144mkii: Add deep sleep command

Add a deep sleep vendor command to be sent during suspend, allowing the
device to enter a lower power state.

Signed-off-by: Šerif Rami <ramiserifpersia@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250814172222.9448-7-ramiserifpersia@gmail.com

diff --git a/sound/usb/usx2y/us144mkii.c b/sound/usb/usx2y/us144mkii.c
index 55d6e002a310e1f86df7e62738519b6bdc7e12a0..da53c1908c4aa6b2a47e84402a254d51d003cb61 100644 (file)
--- a/sound/usb/usx2y/us144mkii.c
+++ b/sound/usb/usx2y/us144mkii.c
@@ -322,6 +322,13 @@ static int tascam_suspend(struct usb_interface *intf, pm_message_t message)
        usb_kill_anchored_urbs(&tascam->midi_in_anchor);
        usb_kill_anchored_urbs(&tascam->midi_out_anchor);
 
+       dev_info(&intf->dev, "sending deep sleep command\n");
+       int err = usb_control_msg(tascam->dev, usb_sndctrlpipe(tascam->dev, 0),
+                                 VENDOR_REQ_DEEP_SLEEP, RT_H2D_VENDOR_DEV,
+                                 0x0000, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS);
+       if (err < 0)
+               dev_err(&intf->dev, "deep sleep command failed: %d\n", err);
+
        return 0;
 }
 

diff --git a/sound/usb/usx2y/us144mkii.h b/sound/usb/usx2y/us144mkii.h
index c740a0b5a0ea43f7fe07f958f220408071cf42d1..ecc4c2fed9e622a175fe21bac1473e55c54b6e95 100644 (file)
--- a/sound/usb/usx2y/us144mkii.h
+++ b/sound/usb/usx2y/us144mkii.h
@@ -46,6 +46,7 @@ enum uac_control_selector {
 
 enum tascam_vendor_request {
        VENDOR_REQ_REGISTER_WRITE = 0x41,
+       VENDOR_REQ_DEEP_SLEEP = 0x44,
        VENDOR_REQ_MODE_CONTROL = 0x49,
 };