media: atomisp: Fix "stop stream timeout." error

media: atomisp: Fix "stop stream timeout." error

Commit c7194b21809e ("media: atomisp: On streamoff wait for buffers owned
by the CSS to be given back") added draining of the CSS buffer queue to
the beginning of atomisp_stop_stream().

But it turns out that when telling the CSS to stop streaming it needs at
least 1 buffer queued, because the CSS firmware waits for a frame to be
completed before stopping and without buffers it cannot complete a frame.

At the end of atomisp_stop_stream() it is always safe to return buffer
ownership to the videobuf2-core. Either atomisp_css_stop() has successfully
stopped the stream; or the atomisp_reset() later on which power-cycles
the ISP will definitely have stopped the stream.

Drop the draining of the CSS buffer queue to fix the "stop stream timeout."
error and move the atomisp_flush_video_pipe() call after atomisp_reset(),
passing false for the warn_on_css_frames flag since some buffers still
being marked as owned by the CSS expected on stream off.

Also increase the timeout in destroy_stream(), since this waits for
the last frame to be completed this can take longer then 40 ms. When e.g.
using a framerate of 15 fps, this could take 66ms, make the timeout 200 ms
to be on the safe side.

Signed-off-by: Hans de Goede <hansg@kernel.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20250505210008.152659-6-hdegoede@redhat.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>