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[Robert Hooker <sarvatt@xxxxxxxxx>]

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https://bugs.launchpad.net/bugs/1404217

Title:
  Backport support for Cherryview/Braswell

Status in mesa package in Ubuntu:
  Invalid
Status in mesa source package in Trusty:
  Fix Committed

Bug description:
  [Impact]

  Mesa 10.1.x doesn't enable support for CHV/BSW, like it didn't for
  Broadwell. Enabling it needs five commits backported from 10.2:

  70285f607ce2a06 i965: initialize more device info fields for Cherryview
  9b6b084eb7b10d0 i965: Add Cherryview support.
  850e372fc7ff337 i965: Drop bogus F32TO16/F16TO32 instructions on Broadwell - use MOV.
  a5e54c91a3b7355 i965: Store absolute thread count in max_wm_threads on Broadwell.
  dca84b4b5b23b68 i965: Use MOV, not OR for setting URB write channel enables on Gen8+.

  [Test Case]
  install trusty on a BSW machine, unity falls back to software rendering which is slow.

  [Regression potential]
  Slim, since it enables new HW, and though some commits are shared with BDW (they are both gen8) they are bugfixes.

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