From: Daniel Vetter Date: Sat, 16 Nov 2013 15:00:09 +0000 (+0100) Subject: drm/i915: restore the early forcewake cleanup X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ef46e0d247da0a7a408573aa15870e231bbd4af2;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: restore the early forcewake cleanup Some BIOS just leak the forcewak bits, which we clean up. Unfortunately this has been broken in commit 521198a2e7095c8c7daa8d7d3a76a110c346be6f Author: Mika Kuoppala Date: Fri Aug 23 16:52:30 2013 +0300 drm/i915: sanitize forcewake registers on reset To make this work both for resets and for BIOS takeover just add the forcewake clearing call back to intel_uncore_early_sanitize. We need to clear the forcewake in early sanitize so that the forcewak dance in intel_uncore_init (to figure out whether we have mt or legacy forcewake on ivb) works. That cleanup fits in nicely with the general topic of early_sanitize to prepare for the very first mmio ops. Cc: Mika Kuoppala Cc: Chris Wilson Reported-by: Jörg Otte Cc: Jörg Otte References: https://lkml.org/lkml/2013/11/16/40 Cc: stable@vger.kernel.org (for 3.12 only) Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index f9883ceff946..0b02078a0b84 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -217,6 +217,19 @@ static void gen6_force_wake_work(struct work_struct *work) spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); } +static void intel_uncore_forcewake_reset(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (IS_VALLEYVIEW(dev)) { + vlv_force_wake_reset(dev_priv); + } else if (INTEL_INFO(dev)->gen >= 6) { + __gen6_gt_force_wake_reset(dev_priv); + if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) + __gen6_gt_force_wake_mt_reset(dev_priv); + } +} + void intel_uncore_early_sanitize(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -234,19 +247,8 @@ void intel_uncore_early_sanitize(struct drm_device *dev) dev_priv->ellc_size = 128; DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size); } -} -static void intel_uncore_forcewake_reset(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (IS_VALLEYVIEW(dev)) { - vlv_force_wake_reset(dev_priv); - } else if (INTEL_INFO(dev)->gen >= 6) { - __gen6_gt_force_wake_reset(dev_priv); - if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) - __gen6_gt_force_wake_mt_reset(dev_priv); - } + intel_uncore_forcewake_reset(dev); } void intel_uncore_sanitize(struct drm_device *dev)