#linux-media 2024-07-25,Thu

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WhoWhatWhen
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ndufresnehverkuil: SebastianCollabora could be nice to discuss further the problems with the implicit request signalling together
At the moment, what we want is not possible to achieve when there any parallelism in the decoder driver
The typical signalling order should something something like:
- HW is programmed, controls are applied (no longer needed)
- Bitstream buffer is no longer needed (but picture not yet reconstructed), so output buffer shall be signalled
- Reconstructed buffer is ready, capture buffer should be signall
- The task of decoding a frame is complete, now is the only valid moment to signal the request
The last step is what goes easily wrong with the current implementation, since the request could get signalled at second step, applying the ctrl later in MTK VCODEC feels like a hack though
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