Hi, guys:<br><br>As I know linaro is working on a unified memory manager for soc world like a similar one already exists in PC world (gem/ttm).<br>But I&#39;m curious about how this manager handle the different sync notify between various different IP vendor?<br>
As we know, on PC the vsp+capture+graphic+display always done by one unit--the GPU, if a piece of hardware memory buffer wanted to be zero-copied between vsp/graphic/display there must be some sync/notify mechanism otherwise the race condition will occur. On gpu always an interrupt driven object fence can handle it. But in soc, there is no integrated vsp/graphic/display, they all may come from various independent ip vendor, so there may no unified interrupt source can be collected by memory manager to know whether one buffer hasn&#39;t be completed by the previous engine and the next engine should block wait but without cpu blocked too. Thanks<br>
<br>Regards<br><br>