From 3e0dc6b01f5301d63046f6deddde2c7f5c57d67a Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Wed, 29 Jun 2011 10:26:42 -0700 Subject: [PATCH] drm/i915: hangcheck disable parameter Provide a parameter to disable hanghcheck. This is useful mostly for developers trying to debug known problems, and probably should not be touched by normal users. Reviewed-by: Chris Wilson Signed-off-by: Ben Widawsky Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/i915_drv.c | 3 +++ drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem.c | 7 +++++-- drivers/gpu/drm/i915/i915_irq.c | 13 +++++++++---- 4 files changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 609358faaa90..b54f7d9b173a 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -70,6 +70,9 @@ module_param_named(vbt_sdvo_panel_type, i915_vbt_sdvo_panel_type, int, 0600); static bool i915_try_reset = true; module_param_named(reset, i915_try_reset, bool, 0600); +bool i915_enable_hangcheck = true; +module_param_named(enable_hangcheck, i915_enable_hangcheck, bool, 0644); + static struct drm_driver driver; extern int intel_agp_enabled; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 01affb63be29..e0f9ca3e5ff8 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -994,6 +994,7 @@ extern unsigned int i915_panel_use_ssc; extern int i915_vbt_sdvo_panel_type; extern unsigned int i915_enable_rc6; extern unsigned int i915_enable_fbc; +extern bool i915_enable_hangcheck; extern int i915_suspend(struct drm_device *dev, pm_message_t state); extern int i915_resume(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 71cc8a353a78..8b670e7ee404 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1779,8 +1779,11 @@ 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 (i915_enable_hangcheck) { + 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 ae2b49969b99..0b0de5239ad5 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -361,10 +361,12 @@ 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 (i915_enable_hangcheck) { + 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) @@ -1664,6 +1666,9 @@ void i915_hangcheck_elapsed(unsigned long data) uint32_t acthd, instdone, instdone1; bool err = false; + if (!i915_enable_hangcheck) + return; + /* If all work is done then ACTHD clearly hasn't advanced. */ if (i915_hangcheck_ring_idle(&dev_priv->ring[RCS], &err) && i915_hangcheck_ring_idle(&dev_priv->ring[VCS], &err) &&