Eric Lee / smarc-fsl-linux-kernel

17 Feb, 2015

1 commit

  • b62b99801   ALSA: usb-audio: Don't attempt to get Lifecam HD-5000 sample rate ... Browse Code »

    Adds a quirk to disable the check that the sample rate has been set correctly, as the Lifecam does not support getting the sample rate.

    This means that we don't need to wait for the USB timeout when attempting to get the sample rate. Waiting for the timeout causes problems in some applications, which give up on the device acquisition process before it has had time to complete, resulting in no sound.

    [minor tidy up by tiwai]

    Signed-off-by: Joe Turner
    Signed-off-by: Takashi Iwai

    Joe Turner
     

29 Nov, 2014

1 commit

  • 6874daad4   ALSA: usb-audio: Add mode select quirk for Denon/Marantz DACs ... Browse Code »

    Denon/Marantz USB DACs need a specific vendor command to switch between PCM and
    DSD mode. This patch adds a new quirk function to switch between the two modes
    using the specific USB vendor command.

    This patch applies to the following devices:
    - Marantz SA-14S1
    - Marantz HD-DAC1

    Signed-off-by: Jurgen Kramer
    Signed-off-by: Takashi Iwai

    Jurgen Kramer
     

18 Apr, 2013

1 commit

  • 126825e7e   ALSA: snd-usb: add quirks handler for DSD streams ... Browse Code »

    Unfortunately, none of the UAC standards provides a way to identify DSD
    (Direct Stream Digital) formats. Hence, this patch adds a quirks
    handler to identify USB interfaces that are capable of handling DSD.

    That quirks handler can augment the already parsed formats bit-field,
    by any of the new SNDRV_PCM_FMTBIT_DSD_{U8_U16} and setting the dsd_dop
    flag in the audio format, if the driver should take care for the DOP
    byte stuffing.

    The only devices that are known to work with this are the ones with
    a 'Playback Designs' vendor id.

    Signed-off-by: Daniel Mack
    Signed-off-by: Takashi Iwai

    Daniel Mack
     

10 Apr, 2013

1 commit

04 Sep, 2012

1 commit

  • 2b58fd5b3   ALSA: snd-usb: Add quirks for Playback Designs devices ... Browse Code »

    Playback Designs' USB devices have some hardware limitations on their
    USB interface. In particular:

    - They need a 20ms delay after each class compliant request as the
    hardware ACKs the USB packets before the device is actually ready
    for the next command. Sending data immediately will result in buffer
    overflows in the hardware.
    - The devices send bogus feedback data at the start of each stream
    which confuse the feedback format auto-detection.

    This patch introduces a new quirks hook that is called after each
    control packet and which adds a delay for all devices that match
    Playback Designs' USB VID for now.

    In addition, it adds a counter to snd_usb_endpoint to drop received
    packets on the floor. Another new quirks function that is called once
    an endpoint is started initializes that counter for these devices on
    their sync endpoint.

    Signed-off-by: Daniel Mack
    Reported-and-tested-by: Andreas Koch
    Supported-by: Demian Martin
    Signed-off-by: Takashi Iwai

    Daniel Mack
     

05 Mar, 2010

1 commit

  • e5779998b   ALSA: usb-audio: refactor code ... Browse Code »

    Clean up the usb audio driver by factoring out a lot of functions to
    separate files. Code for procfs, quirks, urbs, format parsers etc all
    got a new home now.

    Moved almost all special quirk handling to quirks.c and introduced new
    generic functions to handle them, so the exceptions do not pollute the
    whole driver.

    Renamed usbaudio.c to card.c because this is what it actually does now.
    Renamed usbmidi.c to midi.c for namespace clarity.
    Removed more things from usbaudio.h.

    The non-standard drivers were adopted accordingly.

    Signed-off-by: Daniel Mack
    Cc: Clemens Ladisch
    Signed-off-by: Takashi Iwai

    Daniel Mack