From: Alexander Tsoy <alexander@xxxxxxx> [ Upstream commit 73ac9f5e5b43a5dbadb61f27dae7a971f7ec0d22 ] Add delay to make sure that audio urbs are not sent too early. Otherwise the device hangs. Windows driver makes ~2s delay, so use about the same time delay value. snd_usb_apply_boot_quirk() is called 3 times for my MOTU M4, which is an overkill. Thus a quirk that is called only once is implemented. Also send two vendor-specific control messages before and after the delay. This behaviour is blindly copied from the Windows driver. Signed-off-by: Alexander Tsoy <alexander@xxxxxxx> Link: https://lore.kernel.org/r/20200112102358.18085-1-alexander@xxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/usb/card.c | 4 ++++ sound/usb/quirks.c | 38 ++++++++++++++++++++++++++++++++++++++ sound/usb/quirks.h | 5 +++++ 3 files changed, 47 insertions(+) diff --git a/sound/usb/card.c b/sound/usb/card.c index db91dc76cc915..e6a618a239948 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -597,6 +597,10 @@ static int usb_audio_probe(struct usb_interface *intf, } } if (! chip) { + err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id); + if (err < 0) + return err; + /* it's a fresh one. * now look for an empty slot and create a new card instance */ diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 1ed25b1d2a6a2..7448ab07bd363 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1113,6 +1113,31 @@ free_buf: return err; } +static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev) +{ + int ret; + + if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0))) + return -EINVAL; + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 1, USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x0, 0, NULL, 0, 1000); + + if (ret < 0) + return ret; + + msleep(2000); + + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 1, USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x20, 0, NULL, 0, 1000); + + if (ret < 0) + return ret; + + return 0; +} + /* * Setup quirks */ @@ -1297,6 +1322,19 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev, return 0; } +int snd_usb_apply_boot_quirk_once(struct usb_device *dev, + struct usb_interface *intf, + const struct snd_usb_audio_quirk *quirk, + unsigned int id) +{ + switch (id) { + case USB_ID(0x07fd, 0x0008): /* MOTU M Series */ + return snd_usb_motu_m_series_boot_quirk(dev); + } + + return 0; +} + /* * check if the device uses big-endian samples */ diff --git a/sound/usb/quirks.h b/sound/usb/quirks.h index a80e0ddd07364..df0355843a4c1 100644 --- a/sound/usb/quirks.h +++ b/sound/usb/quirks.h @@ -20,6 +20,11 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev, const struct snd_usb_audio_quirk *quirk, unsigned int usb_id); +int snd_usb_apply_boot_quirk_once(struct usb_device *dev, + struct usb_interface *intf, + const struct snd_usb_audio_quirk *quirk, + unsigned int usb_id); + void snd_usb_set_format_quirk(struct snd_usb_substream *subs, struct audioformat *fmt); -- 2.20.1
