• Philipp Zabel's avatar
    [media] coda: disable BWB for all codecs on CODA 960 · 89ed025d
    Philipp Zabel authored
    I don't know what the BWB unit is, I guess W is for write and one of the
    Bs is for burst. All I know is that there repeatedly have been issues
    with it hanging on certain streams (ENGR00223231, ENGR00293425), with
    various firmware versions, sometimes blocking something related to the
    GDI bus or the GDI AXI adapter. There are some error cases that we don't
    know how to recover from without a reboot. Apparently this unit can be
    disabled by setting bit 12 in the FRAME_MEM_CTRL mailbox register to
    zero, so do that to avoid crashes.
    
    Side effects are reduced burst lengths when writing out decoded frames
    to memory, so there is an "enable_bwb" module parameter to turn it back
    on.
    Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
    Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
    89ed025d
coda_regs.h 17.9 KB