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drm/i915: Fix forcewake active domain tracking 

In commit 003342a500 ("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@intel.com>
Fixes: 003342a500 ("drm/i915: Keep track of active forcewake domains in a bitmask")
Testcase: igt/drv_suspend/forcewake
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: "Paneri, Praveen" <praveen.paneri@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: v4.10+ <stable@vger.kernel.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170310093249.4484-1-tvrtko.ursulin@linux.intel.com
hifive-unleashed-5.1
Tvrtko Ursulin 2017-03-10 09:32:49 +00:00
parent 1524e93e1e
commit b847305080
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/intel_uncore.c
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@ -119,6 +119,8 @@ fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_doma
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 *dev_priv, enum forcewake_domains fw_doma
fw_domain_put(d);
fw_domain_posting_read(d);
}
dev_priv->uncore.fw_domains_active &= ~fw_domains;
}
static void
@ -247,10 +251,8 @@ intel_uncore_fw_release_timer(struct hrtimer *timer)
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);
@ -461,10 +463,8 @@ static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
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;
}
}
/**
@ -931,7 +931,6 @@ static noinline void ___force_wake_auto(struct drm_i915_private *dev_priv,
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,