+ Sumit, Rob, Laura and Daniel who have discussed cache optimization with me at LPC in the context of dmabuf. The full patch set can be found at https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg92120.html On Tuesday 08 September 2015 13:33:44 Sakari Ailus wrote: > Hi folks, > > This RFC patchset achieves two main objectives: > > 1. Respects cache flags passed from the user space. As no driver nor > videobuf2 has (ever?) implemented them, the two flags are replaced by a > single one (V4L2_BUF_FLAG_NO_CACHE_SYNC) and the two old flags are > deprecated. This is done since a single flag provides the driver with > enough information on what to do. (See more info in patch 4.) > > 2. Allows a driver using videobuf2 dma-contig memory type to choose > whether it prefers coherent or non-coherent CPU access to buffer memory > for MMAP and USERPTR buffers. This could be later extended to be specified > by the user, and per buffer if needed. > > Only dma-contig memory type is changed but the same could be done to > dma-sg as well. I can add it to the set if people are happy with the > changes to dma-contig. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
