diff options
| author | Olof Johansson <olof@lixom.net> | 2013-08-04 13:19:05 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-08-04 13:19:05 -0700 |
| commit | 6a33fc8cacfc7fac829c72bd321868be7e72f609 (patch) | |
| tree | ca8572f214a30c4743b731b4ab2809a980b78369 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 3bd957978bb50390bb07678bc4c125989e9a81a2 (diff) | |
| parent | 2746a7c272a3242f919fa2fd5a5f2d9f8a41173a (diff) | |
Merge tag 'fixes-non-3.12' of git://git.infradead.org/linux-mvebu into next/fixes-non-critical
From Jason Cooper:
mvebu fixes-non-critical for v3.12
- dove
- fix section mismatch (all callers are already _init, so it's just a space
issue)
* tag 'fixes-non-3.12' of git://git.infradead.org/linux-mvebu:
ARM: dove: fix missing __init section of dove_mpp_gpio_mode
+ Linux 3.11-rc2
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index ccbdd83f5220..d10e6735771f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5500,9 +5500,38 @@ void intel_gt_init(struct drm_device *dev) if (IS_VALLEYVIEW(dev)) { dev_priv->gt.force_wake_get = vlv_force_wake_get; dev_priv->gt.force_wake_put = vlv_force_wake_put; - } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { + } else if (IS_HASWELL(dev)) { dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; + } else if (IS_IVYBRIDGE(dev)) { + u32 ecobus; + + /* IVB configs may use multi-threaded forcewake */ + + /* A small trick here - if the bios hasn't configured + * MT forcewake, and if the device is in RC6, then + * force_wake_mt_get will not wake the device and the + * ECOBUS read will return zero. Which will be + * (correctly) interpreted by the test below as MT + * forcewake being disabled. + */ + mutex_lock(&dev->struct_mutex); + __gen6_gt_force_wake_mt_get(dev_priv); + ecobus = I915_READ_NOTRACE(ECOBUS); + __gen6_gt_force_wake_mt_put(dev_priv); + mutex_unlock(&dev->struct_mutex); + + if (ecobus & FORCEWAKE_MT_ENABLE) { + dev_priv->gt.force_wake_get = + __gen6_gt_force_wake_mt_get; + dev_priv->gt.force_wake_put = + __gen6_gt_force_wake_mt_put; + } else { + DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n"); + DRM_INFO("when using vblank-synced partial screen updates.\n"); + dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; + dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; + } } else if (IS_GEN6(dev)) { dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; |