[Mesa-dev] [PATCH 4/9] i965: Compact acc_wr_control only on Gen6+.

[Matt Turner]

On Tue, Oct 20, 2015 at 1:51 AM, Iago Toral <itoral at igalia.com> wrote:
> On Mon, 2015-10-19 at 21:09 -0700, Matt Turner wrote:
>> It only exists on Gen6+, and the next patches will add compaction
>> support for the (unused) field in the same location on earlier
>> platforms.
>
> The docs say that this exists also in ILK at least. See Page 131 of:
> https://01.org/sites/default/files/documentation/ilk_ihd_os_vol4_part2_july_28_10_0.pdf
>
> However, I see some places in the i965 code where dealing with this is
> surrounded by if (gen >= 6)...
>
> Is this a bug in the ILK documentation?

Yes. The ILK docs are terrible and contain more SNB documentation than
ILK documentation. :(