• Devin Heitmueller's avatar
    [media] cx88: properly maintain decoder config when using MPEG encoder · 243bf1a2
    Devin Heitmueller authored
    The cx88 driver would force core->input to always be zero when doing the
    the request_acquire().  While it wasn't actually changing the input register
    in the hardware, the driver makes decision based on the current input.  In
    particular, it decides whether to do things like enabling the comb filter
    when on a composite input but disabling it on s-video.  So for example, on
    the HVR-1300, using the s-video input with the MPEG encoder would end up with
    the video decoder core configured as though the input type were composite.
    
    In short, the driver state did not match the hardware state.
    
    This patch does two things:
    
    1.  It forces the input to zero only if actually switching to DVB mode.  This
    prevents the input from changing when the blackbird driver opens the device.
    
    2.  Keep track of what the input was set to when switching to DVB, and reset
    it back when done.  This eliminates a condition where for example the user
    had the analog side of the board set to capture on the s-video input, then
    he used DVB for a bit, then the analog input would unexpectedly be set to
    the tuner input.
    
    This work was sponsored by Anevia S.A.
    Signed-off-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
    Cc: Florent Audebert <florent.audebert@anevia.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    243bf1a2
cx88.h 22.7 KB