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* hexagon: move the converting CPY in blocks of rows per DMA descriptor so short rows are not DMA-latency bound * hex-cpy: cleanup cpy cursor handling * hex-cpy-concat: introduce threaded dma/hvx gather-row helper Co-authored-by: Ruslan Karymov <67752306+karusrus@users.noreply.github.com> * hex-cpy: remove leftover rejections for extended buffers * hex-cpy: relax the gate for fast-path * hex-cpy: remove scalar divs and vtcm access and use explicit gather_sync * hex-cpy: add proper support for mdev work splitting to fastpath * hex-cpy: optimize dense gather-row tasks * hex-cpy: unroll gather-rows loops * hex-cpy: add fastpath for f16 * hex-cpy-concat: support for colapsing 3/4D dims * hex-cpy: double-buffer support * hex-cpy: factor out gather-rows into more of an op by itself * hex-cpy-concat: dedup kernel-params * hex-cpy-concat: step-down nr to fit instead of hard fail * hex-gather: replace div with a mask * hex-gather-rows: cleanup dma pipeline and remove the stalls * hex-gather: specialize compute funcs * hex-gather: reduce scalar reg.spills and func calls * hex-gather: do not recompute rows-per-thread on the npu * hex-build: add support for building/installing just hexagon * hex-cpy-concat: remove redundant barrier in concat and move cpy barrier under fence * hex-gather: annotations for dma-out * hex-mdev: make all key vtcm_acquire sync state atomic (fixes random hangs in mdev setups) --------- Co-authored-by: Yiwei Shao <yiwei@aizip.ai> Co-authored-by: Ruslan Karymov <67752306+karusrus@users.noreply.github.com>