This kernel parameter is defined in arch/arm/include/asm/memory.h as follows:
/*
* Size of DMA-consistent memory region. Must be multiple of 2M,
* between 2MB and 14MB inclusive.
*/
#ifndef CONSISTENT_DMA_SIZE
#define CONSISTENT_DMA_SIZE (SZ_8M + SZ_4M)
#endif
Why the upper limit of 14MB? I would like to use the vpfe driver and 22 1280*960 buffers for video capture of up to 22 frames from an APtina MT9M021 camera chip. Is this possible?