Commit cabb6eb3 authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Sasha Levin

Add USB quirk for HVR-950q to avoid intermittent device resets

[ Upstream commit 6836796d ]

The USB core and sysfs will attempt to enumerate certain parameters
which are unsupported by the au0828 - causing inconsistent behavior
and sometimes causing the chip to reset.  Avoid making these calls.

This problem manifested as intermittent cases where the au8522 would
be reset on analog video startup, in particular when starting up ALSA
audio streaming in parallel - the sysfs entries created by
snd-usb-audio on streaming startup would result in unsupported control
messages being sent during tuning which would put the chip into an
unknown state.
Signed-off-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent acca1ac3
...@@ -223,6 +223,10 @@ static const struct usb_device_id usb_quirk_list[] = { ...@@ -223,6 +223,10 @@ static const struct usb_device_id usb_quirk_list[] = {
/* Blackmagic Design UltraStudio SDI */ /* Blackmagic Design UltraStudio SDI */
{ USB_DEVICE(0x1edb, 0xbd4f), .driver_info = USB_QUIRK_NO_LPM }, { USB_DEVICE(0x1edb, 0xbd4f), .driver_info = USB_QUIRK_NO_LPM },
/* Hauppauge HVR-950q */
{ USB_DEVICE(0x2040, 0x7200), .driver_info =
USB_QUIRK_CONFIG_INTF_STRINGS },
/* INTEL VALUE SSD */ /* INTEL VALUE SSD */
{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME }, { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
......
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