This is a note to let you know that I've just added the patch titled
drm/i915: Fix forcewake active domain tracking
to the 4.10-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-forcewake-active-domain-tracking.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6aef660370a9c246956ba6d01eebd8063c4214cb Mon Sep 17 00:00:00 2001
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Date: Fri, 10 Mar 2017 09:32:49 +0000
Subject: drm/i915: Fix forcewake active domain tracking
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
commit 6aef660370a9c246956ba6d01eebd8063c4214cb upstream.
In commit 003342a50021 ("drm/i915: Keep track of active
forcewake domains in a bitmask") I forgot to adjust the
newly introduce fw_domains_active state across reset.
This caused the assert_forcewakes_inactive to trigger
during suspend and resume if there were user held
forcewakes.
v2: Bitmask checks are required since vfuncs are not
always present.
v3: Move bitmask tracking to get/put vfunc for simplicity.
(Chris Wilson)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Fixes: 003342a50021 ("drm/i915: Keep track of active forcewake domains in a bitmask")
Testcase: igt/drv_suspend/forcewake
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: "Paneri, Praveen" <praveen.paneri@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170310093249.4484-1-tvrtko.ursulin@xxxxxxxxxxxxxxx
(cherry picked from commit b8473050805f35add97f3ff57570d55a01808df5)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_uncore.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -119,6 +119,8 @@ fw_domains_get(struct drm_i915_private *
for_each_fw_domain_masked(d, fw_domains, dev_priv)
fw_domain_wait_ack(d);
+
+ dev_priv->uncore.fw_domains_active |= fw_domains;
}
static void
@@ -130,6 +132,8 @@ fw_domains_put(struct drm_i915_private *
fw_domain_put(d);
fw_domain_posting_read(d);
}
+
+ dev_priv->uncore.fw_domains_active &= ~fw_domains;
}
static void
@@ -240,10 +244,8 @@ intel_uncore_fw_release_timer(struct hrt
if (WARN_ON(domain->wake_count == 0))
domain->wake_count++;
- if (--domain->wake_count == 0) {
+ if (--domain->wake_count == 0)
dev_priv->uncore.funcs.force_wake_put(dev_priv, domain->mask);
- dev_priv->uncore.fw_domains_active &= ~domain->mask;
- }
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
@@ -455,10 +457,8 @@ static void __intel_uncore_forcewake_get
fw_domains &= ~domain->mask;
}
- if (fw_domains) {
+ if (fw_domains)
dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
- dev_priv->uncore.fw_domains_active |= fw_domains;
- }
}
/**
@@ -962,7 +962,6 @@ static noinline void ___force_wake_auto(
fw_domain_arm_timer(domain);
dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
- dev_priv->uncore.fw_domains_active |= fw_domains;
}
static inline void __force_wake_auto(struct drm_i915_private *dev_priv,
Patches currently in stable-queue which might be from tvrtko.ursulin@xxxxxxxxx are
queue-4.10/drm-i915-gen9-increase-pcode-request-timeout-to-50ms.patch
queue-4.10/drm-i915-fix-forcewake-active-domain-tracking.patch