tree 1ec8b33ec54d2a69fccfa548271e7ebf5e4481cc
parent e8cb8d69d125f56fa3ba5239b215a56718e2ca44
author Paulo Zanoni <paulo.r.zanoni@intel.com> 1442254796 -0300
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1443011957 +0200

drm/i915: check for the supported strides on HSW+ FBC

Don't allow FBC for cases where the spec says we can't FBC.

v2:
  - Just WARN_ON() the strides that should have been caught earlier
    (Daniel)
  - Make it a new function since I expect this to grow more.
v3:
  - Document which IGT test is exercised by this.
v4:
  - Implement the restrictions for gens 2-6 too (Ville).
  - Fix off-by-one mistake (Ville).

Testcase: igt/kms_frontbuffer_tracking/fbc-badstride
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>