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drm/i915/guc: Grab RPM wakelock while disabling GuC interrupts

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Disabling GuC interrupts involves access to GuC IRQ control registers
hence ensure device is RPM awake.

v1-v2: old changelog
1: Add comment about need to synchronize flush work and log runtime
   destroy
2: Moved patch earlier in the series and removed comment about future
work. (Tvrtko)

v3: Added assert_rpm_wakelock_held() to gen9_*_guc_interrupts. (Chris)

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1516808821-3638-1-git-send-email-sagar.a.kamble@intel.com
This commit is contained in:
Sagar Arun Kamble 2018-01-24 21:16:56 +05:30 committed by Chris Wilson
parent 16af25faae
commit 1be333d34e
2 changed files with 9 additions and 0 deletions
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6
drivers/gpu/drm/i915/i915_irq.c
View File

@ -452,6 +452,8 @@ void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
{
assert_rpm_wakelock_held(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
gen6_reset_pm_iir(dev_priv, dev_priv->pm_guc_events);
spin_unlock_irq(&dev_priv->irq_lock);
@ -459,6 +461,8 @@ void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv)
{
assert_rpm_wakelock_held(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
if (!dev_priv->guc.interrupts_enabled) {
WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) &
@ -471,6 +475,8 @@ void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv)
void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
{
assert_rpm_wakelock_held(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
dev_priv->guc.interrupts_enabled = false;

3
drivers/gpu/drm/i915/intel_guc_log.c
View File

@ -639,7 +639,10 @@ void i915_guc_log_unregister(struct drm_i915_private *dev_priv)
mutex_lock(&dev_priv->drm.struct_mutex);
/* GuC logging is currently the only user of Guc2Host interrupts */
intel_runtime_pm_get(dev_priv);
gen9_disable_guc_interrupts(dev_priv);
intel_runtime_pm_put(dev_priv);
guc_log_runtime_destroy(&dev_priv->guc);
mutex_unlock(&dev_priv->drm.struct_mutex);
}