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authorDaniel Vetter <daniel.vetter@ffwll.ch>2013-07-21 13:16:24 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2013-07-21 15:37:02 +0200
commit181d1b9e31c668259d3798c521672afb8edd355c (patch)
treec35adc77a69304b3ee622a911b3a99f40e6a75d6 /drivers/gpu
parenta7cd1b8fea2f341b626b255d9898a5ca5fabbf0a (diff)
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drm/i915: fix up gt init sequence fallout
The regression fix for gen6+ rps fallout commit 7dcd2677ea912573d9ed4bcd629b0023b2d11505 Author: Konstantin Khlebnikov <khlebnikov@openvz.org> Date: Wed Jul 17 10:22:58 2013 +0400 drm/i915: fix long-standing SNB regression in power consumption after resume unintentionally also changed the init sequence ordering between gt_init and gt_reset - we need to reset BIOS damage like leftover forcewake references before we run our own code. Otherwise we can get nasty dmesg noise like [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear. again. Since _reset suggests that we first need to have stuff initialized (which isn't the case here) call it sanitze instead. While at it also block out the rps disable introduced by the above commit on ilk: We don't have any knowledge of ilk rps being broken in similar ways. And the disable functions uses the default hw state which is only read out when we're enabling rps. So essentially we've been writing random grabage into that register. Reported-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: stable@vger.kernel.org Tested-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/i915_dma.c2
-rw-r--r--drivers/gpu/drm/i915/i915_drv.c4
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h2
-rw-r--r--drivers/gpu/drm/i915/intel_pm.c5
4 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 5c0663f58aff..abf158da9b30 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1593,8 +1593,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
intel_detect_pch(dev);
intel_irq_init(dev);
+ intel_gt_sanitize(dev);
intel_gt_init(dev);
- intel_gt_reset(dev);
/* Try to make sure MCHBAR is enabled before poking at it */
intel_setup_mchbar(dev);
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 6ddc5677ea2f..45b3c030f483 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -706,7 +706,7 @@ static int i915_drm_thaw(struct drm_device *dev)
{
int error = 0;
- intel_gt_reset(dev);
+ intel_gt_sanitize(dev);
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
@@ -732,7 +732,7 @@ int i915_resume(struct drm_device *dev)
pci_set_master(dev->pdev);
- intel_gt_reset(dev);
+ intel_gt_sanitize(dev);
/*
* Platforms with opregion should have sane BIOS, older ones (gen3 and
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 204c3eca0fb2..d2ee3343c943 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1584,7 +1584,7 @@ void i915_handle_error(struct drm_device *dev, bool wedged);
extern void intel_irq_init(struct drm_device *dev);
extern void intel_hpd_init(struct drm_device *dev);
extern void intel_gt_init(struct drm_device *dev);
-extern void intel_gt_reset(struct drm_device *dev);
+extern void intel_gt_sanitize(struct drm_device *dev);
void i915_error_state_free(struct kref *error_ref);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 828c426b4b92..6a347f54d39f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5476,7 +5476,7 @@ static void vlv_force_wake_put(struct drm_i915_private *dev_priv)
gen6_gt_check_fifodbg(dev_priv);
}
-void intel_gt_reset(struct drm_device *dev)
+void intel_gt_sanitize(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -5489,7 +5489,8 @@ void intel_gt_reset(struct drm_device *dev)
}
/* BIOS often leaves RC6 enabled, but disable it for hw init */
- intel_disable_gt_powersave(dev);
+ if (INTEL_INFO(dev)->gen >= 6)
+ intel_disable_gt_powersave(dev);
}
void intel_gt_init(struct drm_device *dev)