drm/i915: Disable FBC on Ironlake to save 1W
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
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 80745f8..f737960 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -150,7 +150,8 @@
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,
};