diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2014-06-06 13:37:11 +0400 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2014-06-11 12:06:43 +0400 |
| commit | 0368920e51ae0cded0eb518c340a4dd17764d461 (patch) | |
| tree | fe9472fceaf2061424c361a44b829df53a40472d /drivers/gpu | |
| parent | bc1dfff04a5d4064ba0db1fab13f84ab4f333d2b (diff) | |
| download | linux-0368920e51ae0cded0eb518c340a4dd17764d461.tar.xz | |
drm/i915: Disable FBC by default also on Haswell and later
It causes black screen on bootup and is approximately 100x slower than
running with FBC disabled, so the GPU runs at a high frequency for much
longer - completely contrary to the power saving claims. It also still
has mutex deadlocks in multi-head scenarios, which can lead to a
system/X lockup. These bugs were known before FBC was enabled by default
on Haswell and still have not been fixed.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79716
Reported-and-tested-by: Jon Kristensen <info@jonkri.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
[Jani: update subject to reflect the actual change]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index d1e53abec1b5..7e2db9abd810 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -511,8 +511,7 @@ void intel_update_fbc(struct drm_device *dev) obj = intel_fb->obj; adjusted_mode = &intel_crtc->config.adjusted_mode; - if (i915.enable_fbc < 0 && - INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) { + if (i915.enable_fbc < 0) { if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT)) DRM_DEBUG_KMS("disabled per chip default\n"); goto out_disable; |