drm/i915: Hookup chip reset in error handler

This patch uses the previously introduced chip reset logic to reset the
chip when an error event is detected.

Signed-off-by: Ben Gamari <bgamari.foss@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 2a042bc173fe..8f5276614ce2 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -302,12 +302,25 @@ static void i915_error_work_func(struct work_struct *work)
         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
                                                     error_work);
         struct drm_device *dev = dev_priv->dev;
-        char *event_string = "ERROR=1";
-        char *envp[] = { event_string, NULL };
+        char *error_event[] = { "ERROR=1", NULL };
+        char *reset_event[] = { "RESET=1", NULL };
+        char *reset_done_event[] = { "ERROR=0", NULL };
 
         DRM_DEBUG("generating error event\n");
+        kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
 
-        kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp);
+        if (dev_priv->mm.wedged) {
+                if (IS_I965G(dev)) {
+                        DRM_DEBUG("resetting chip\n");
+                        kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
+                        if (!i965_reset(dev, GDRST_RENDER)) {
+                                dev_priv->mm.wedged = 0;
+                                kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
+                        }
+                } else {
+                        printk("reboot required\n");
+                }
+        }
 }
 
 /**