[Beignet] Atom 3845

[Mark Thompson]

On 27/01/18 11:01, Rebecca N. Palmer wrote:
> That wording implies this is Debian beignet (upstream beignet uses the wording "cl_get_gt_device(): error, unknown device: %x"), which is 1.3.0 in stretch.  This should support Bay Trail, but I don't have the hardware to actually try this.
> 
> Please post the output of
> 
> xrandr --listproviders
> glxinfo | grep " vendor\| renderer"
> lspci -nn | grep -e "\[03..\]:"
> 
> Supported Bay Trail devices have ID [8086:0f31] in the last of these.

Just the one device there does seem incomplete.

The kernel driver has six possible IDs including that one:
<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/drm/i915_pciids.h#n240>

While the VAAPI driver has five:
<https://github.com/intel/intel-vaapi-driver/blob/master/src/i965_pciids.h#L49-L53>

If the device isn't present, it may well work just by adding the PCI-ID to the places in cl_device_data.h and cl_device_id.c matching the existing Bay Trail ID.  (Though of course there might be some reason these IDs are omitted that I'm not aware of.)

- Mark