kernel/git/stable/linux.git/sound/usb, branch linux-4.2.y

ALSA: usb-audio: work around CH345 input SysEx corruption

2015-12-09T19:31:25+00:00

commit a91e627e3f0ed820b11d86cdc04df38f65f33a70 upstream. One of the many faults of the QinHeng CH345 USB MIDI interface chip is that it does not handle received SysEx messages correctly -- every second event packet has a wrong code index number, which is the one from the last seen message, instead of 4. For example, the two messages "FE F0 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E F7" result in the following event packets: correct: CH345: 0F FE 00 00 0F FE 00 00 04 F0 01 02 04 F0 01 02 04 03 04 05 0F 03 04 05 04 06 07 08 04 06 07 08 04 09 0A 0B 0F 09 0A 0B 04 0C 0D 0E 04 0C 0D 0E 05 F7 00 00 05 F7 00 00 A class-compliant driver must interpret an event packet with CIN 15 as having a single data byte, so the other two bytes would be ignored. The message received by the host would then be missing two bytes out of six; in this example, "F0 01 02 03 06 07 08 09 0C 0D 0E F7". These corrupted SysEx event packages contain only data bytes, while the CH345 uses event packets with a correct CIN value only for messages with a status byte, so it is possible to distinguish between these two cases by checking for the presence of this status byte. (Other bugs in the CH345's input handling, such as the corruption resulting from running status, cannot be worked around.) Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: prevent CH345 multiport output SysEx corruption

2015-12-09T19:31:25+00:00

commit 1ca8b201309d842642f221db7f02f71c0af5be2d upstream. The CH345 USB MIDI chip has two output ports. However, they are multiplexed through one pin, and the number of ports cannot be reduced even for hardware that implements only one connector, so for those devices, data sent to either port ends up on the same hardware output. This becomes a problem when both ports are used at the same time, as longer MIDI commands (such as SysEx messages) are likely to be interrupted by messages from the other port, and thus to get lost. It would not be possible for the driver to detect how many ports the device actually has, except that in practice, _all_ devices built with the CH345 have only one port. So we can just ignore the device's descriptors, and hardcode one output port. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: add packet size quirk for the Medeli DD305

2015-12-09T19:31:24+00:00

commit 98d362becb6621bebdda7ed0eac7ad7ec6c37898 upstream. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb: Add native DSD support for Aune X1S

2015-12-09T19:31:23+00:00

commit 16771c7c704769c5f3d70c024630b6e5b3eafa67 upstream. This patch adds native DSD support for the Aune X1S 32BIT/384 DSD DAC Signed-off-by: Jurgen Kramer Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: correct the value cache check.

2015-09-29T17:33:21+00:00

commit 6aa6925cad06159dc6e25857991bbc4960821242 upstream. The check of cval->cached should be zero-based (including master channel). Signed-off-by: Yao-Wen Mao Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb: Add native DSD support for Gustard DAC-X20U

2015-08-21T08:27:35+00:00

This patch adds native DSD support for the Gustard DAC-X20U. Signed-off-by: Jurgen Kramer Cc: Signed-off-by: Takashi Iwai

ALSA: usb-audio: Fix runtime PM unbalance

2015-08-19T12:57:51+00:00

The fix for deadlock in PM in commit [1ee23fe07ee8: ALSA: usb-audio: Fix deadlocks at resuming] introduced a new check of in_pm flag. However, the brainless patch author evaluated it in a wrong way (logical AND instead of logical OR), thus usb_autopm_get_interface() is wrongly called at probing, leading to unbalance of runtime PM refcount. This patch fixes it by correcting the logic. Reported-by: Hans Yang Fixes: 1ee23fe07ee8 ('ALSA: usb-audio: Fix deadlocks at resuming') Cc: [v3.15+] Signed-off-by: Takashi Iwai

ALSA: usb-audio: add dB range mapping for some devices

2015-07-29T07:28:02+00:00

Add the correct dB ranges of Bose Companion 5 and Drangonfly DAC 1.2. Signed-off-by: Yao-Wen Mao Cc: Signed-off-by: Takashi Iwai

ALSA: line6: Fix -EBUSY error during active monitoring

2015-07-14T13:19:37+00:00

When a monitor stream is active, the next PCM stream access results in EBUSY error because of the check in line6_stream_start(). Fix this by just skipping the submission of pending URBs when the stream is already running instead. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=101431 Cc: # v4.0+ Signed-off-by: Takashi Iwai

ALSA: usb-audio: Add MIDI support for Steinberg MI2/MI4

2015-07-01T15:29:40+00:00

The Steinberg MI2 and MI4 interfaces are compatible with the USB class audio spec, but the MIDI part of the devices is reported as a vendor specific interface. This patch adds entries to quirks-table.h to recognize the MIDI endpoints. Audio functionality was already working and is unaffected by this change. Signed-off-by: Dominic Sacré Signed-off-by: Albert Huitsing Acked-by: Clemens Ladisch Cc: Signed-off-by: Takashi Iwai