Provide a flag to disable the hangcheck timer
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem.c | 6 ++++--
drivers/gpu/drm/i915/i915_irq.c | 9 ++++++---
3 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 8a9fd91..05f82a7 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -320,6 +320,7 @@ typedef struct drm_i915_private {
#define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */
struct timer_list hangcheck_timer;
int hangcheck_count;
+ bool hangcheck_disabled;
uint32_t last_acthd;
uint32_t last_instdone;
uint32_t last_instdone1;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index cb1f61d..d50546c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1777,8 +1777,10 @@ i915_add_request(struct intel_ring_buffer *ring,
ring->outstanding_lazy_request = false;
if (!dev_priv->mm.suspended) {
- mod_timer(&dev_priv->hangcheck_timer,
- jiffies +
msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
+ if (!dev_priv->hangcheck_disabled) {
+ mod_timer(&dev_priv->hangcheck_timer, jiffies +
+ msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
+ }
if (was_empty)
queue_delayed_work(dev_priv->wq,
&dev_priv->mm.retire_work, HZ);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index b9fafe3..af72412 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -362,9 +362,11 @@ static void notify_ring(struct drm_device *dev,
ring->irq_seqno = seqno;
wake_up_all(&ring->irq_queue);
- dev_priv->hangcheck_count = 0;
- mod_timer(&dev_priv->hangcheck_timer,
- jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
+ if (!dev_priv->hangcheck_disabled) {
+ dev_priv->hangcheck_count = 0;
+ mod_timer(&dev_priv->hangcheck_timer, jiffies +
+ msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
+ }
}
static void gen6_pm_rps_work(struct work_struct *work)
@@ -1721,6 +1723,7 @@ void i915_hangcheck_elapsed(unsigned long data)
}
repeat:
+ BUG_ON(dev_priv->hangcheck_disabled);
/* Reset timer case chip hangs without another request being added */
mod_timer(&dev_priv->hangcheck_timer,
jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
--
1.7.5.2
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