On 19/12/2019 11:40, Laurent Pinchart wrote:
Do we ever get drm_bridge_funcs calls from multiple threads at the
same time? Is there a difference between having a single DPI output,
or multiple DPI outputs (i.e. can two different DPI outputs get calls
simultaneously?).
I'll drop the lock, it's not needed. The core should serialize calls to
the bridge, at least per output. For different outputs, there's a
possibility I believe of atomic commits being handled concurrently if
they don't share any resource.
I don't think we do much locking with resource handling. E.g. we have single registers with mux
settings for multiple outputs. If DPI (or any other dss output) gets called concurrently for
different outputs, we might get a race.
I wonder if that concurrency is opt-in...
Tomi
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