TDA4VM: Why appMemCacheWb() is blocked for A72 in tivxMemBufferUnmap()?

Hello,

appMemCache is blocked for a72. Why A72 doesn't need CachWb? How to prevent memory coherency problem?

vx_status tivxMemBufferUnmap(
    void *host_ptr, uint32_t size, vx_enum mem_type, vx_enum maptype)
{
    vx_status status = (vx_status)VX_SUCCESS;

    if ((NULL != host_ptr) && (0U != size))
    {
        if (((vx_enum)TIVX_MEMORY_TYPE_DMA != mem_type) &&
            (((vx_enum)VX_WRITE_ONLY == maptype) || ((vx_enum)VX_READ_AND_WRITE == maptype)))
        {
            #ifndef A72
            appMemCacheWb(
                host_ptr,
                size);
            #endif
        }
    }
    else
    {
        status = (vx_status)VX_FAILURE;
        VX_PRINT(VX_ZONE_ERROR, "tivxMemBufferUnmap failed (either pointer is NULL or size is 0)\n");
    }

    return status;
}

Best regards,

Wilson.