This is a note to let you know that I've just added the patch titled
drm/i915: fix up gt init sequence fallout
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-fix-up-gt-init-sequence-fallout.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 181d1b9e31c668259d3798c521672afb8edd355c Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Sun, 21 Jul 2013 13:16:24 +0200
Subject: drm/i915: fix up gt init sequence fallout
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
commit 181d1b9e31c668259d3798c521672afb8edd355c upstream.
The regression fix for gen6+ rps fallout
commit 7dcd2677ea912573d9ed4bcd629b0023b2d11505
Author: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Tested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_dma.c | 2 +-
drivers/gpu/drm/i915/i915_drv.c | 4 ++--
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_pm.c | 5 +++--
4 files changed, 7 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1608,8 +1608,8 @@ int i915_driver_load(struct drm_device *
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);
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -685,7 +685,7 @@ static int i915_drm_thaw(struct drm_devi
{
int error = 0;
- intel_gt_reset(dev);
+ intel_gt_sanitize(dev);
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
@@ -711,7 +711,7 @@ 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
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1477,7 +1477,7 @@ void i915_handle_error(struct drm_device
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);
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4486,7 +4486,7 @@ static void vlv_force_wake_put(struct dr
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;
@@ -4499,7 +4499,8 @@ void intel_gt_reset(struct drm_device *d
}
/* 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)
Patches currently in stable-queue which might be from daniel.vetter@xxxxxxxx are
queue-3.10/drm-i915-correctly-restore-fences-with-objects-attached.patch
queue-3.10/partially-revert-drm-i915-unconditionally-use-mt-forcewake-on-hsw-ivb.patch
queue-3.10/drm-i915-fix-write-read-race-with-multiple-rings.patch
queue-3.10/drm-i915-fix-long-standing-snb-regression-in-power-consumption-after-resume-v2.patch
queue-3.10/drm-i915-fix-dereferencing-invalid-connectors-in-is_crtc_connector_off.patch
queue-3.10/drm-i915-quirk-no-pch_pwm_enable-for-dell-xps13-backlight.patch
queue-3.10/drm-i915-fix-incoherence-with-fence-updates-on-sandybridge.patch
queue-3.10/drm-i915-fix-up-gt-init-sequence-fallout.patch
queue-3.10/drm-i915-fix-up-ring-cleanup-for-the-i830-i845-cs-tlb-w-a.patch
queue-3.10/drm-i915-fix-missed-hunk-after-gt-access-breakage.patch
queue-3.10/drm-i915-serialize-almost-all-register-access.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html