drm/i915: Disable FBC on Ironlake to save 1W
authorAlex Shi <alex.shi@intel.com>
Fri, 19 Nov 2010 09:33:55 +0000 (09:33 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Fri, 19 Nov 2010 09:36:21 +0000 (09:36 +0000)
Frame buffer compression is broken on Ironlake due to buggy hardware.
Currently it is disabled through chicken bits, but it still consumes
over 1W more than if we simply never attempt to enable the FBC code
paths.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
drivers/gpu/drm/i915/i915_drv.c

index 80745f8..f737960 100644 (file)
@@ -150,7 +150,8 @@ static const struct intel_device_info intel_ironlake_d_info = {
 
 static const struct intel_device_info intel_ironlake_m_info = {
        .gen = 5, .is_mobile = 1,
-       .need_gfx_hws = 1, .has_fbc = 1, .has_rc6 = 1, .has_hotplug = 1,
+       .need_gfx_hws = 1, .has_rc6 = 1, .has_hotplug = 1,
+       .has_fbc = 0, /* disabled due to buggy hardware */
        .has_bsd_ring = 1,
 };