The release note to the latest experimental driver date 2014-05-19 says that intel did=0xa16 is supported. When i run 
egl-gears application to test the driver a following error is recorded in the system log:

Feb 09 13:18:32    6     8     0 VGA primary : bus 0x0 dev/func 0x10
Feb 09 13:18:32    6     8     0 Found 1 PCI/AGP display devices
Feb 09 13:18:32    6     8     0 pci_init: found PCI device 8086:a16
Feb 09 13:18:33    6     8     0 [intelhd] Can't detect Intel PCH type
Feb 09 13:18:33    6     8     0 Primary active: 0 10 7

The egl-gears runs fine with vesabios or vga driver.

The pci -v for this particular chip :
Class          = Display (VGA)
Vendor ID      = 8086h, Intel Corporation
Device ID      = a16h, Unknown Unknown
PCI index      = 0h
Class Codes    = 030000h
Revision ID    = bh
Bus number     = 0
Device number  = 2
Function num   = 0
Status Reg     = 90h
Command Reg    = 7h
Header type    = 0h Single-function
BIST           = 0h Build-in-self-test not supported
Latency Timer  = 0h
Cache Line Size= 0h
BAR - 0 [Mem]  = f7000000h 64bit length 4194304 enabled
BAR - 2 [Mem]  = e8000000h prefetchable 64bit length 134217728 enabled
BAR - 4 [I/O]  = f000h length 64 enabled
Subsystem Vendor ID = 8086h
Subsystem ID        = a16h
Max Lat        = 0ns
Min Gnt        = 0ns
PCI Int Pin    = INT A
Interrupt line = 11
CPU Interrupt  = bh
Capabilities Pointer = 90h
Capability ID        = 5h - Message Signaled Interrupts
Capabilities         = 0h - 0h
Capability ID        = 1h - Power Management
Capabilities         = 22h - 0h
Capability ID        = 13h - Unknown
Capabilities         = 306h - 0h

WHAT I AM MISSING?