Signed-off-by: Chris Wilson <[email protected]>
---
drivers/gpu/drm/i915/i915_irq.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 69a36fc..21c7d77 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1322,6 +1322,16 @@ void i915_hangcheck_elapsed(unsigned long data)
dev_priv->last_instdone1 == instdone1) {
if (dev_priv->hangcheck_count++ > 1) {
DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
+
+ if (!IS_GEN2(dev)) {
+ u32 tmp = I915_READ(PRB0_CTL);
+ if (tmp & RING_WAIT) {
+ I915_WRITE(PRB0_CTL, tmp);
+ POSTING_READ(PRB0_CTL);
+ goto out;
+ }
+ }
+
i915_handle_error(dev, true);
return;
}
@@ -1333,6 +1343,7 @@ void i915_hangcheck_elapsed(unsigned long data)
dev_priv->last_instdone1 = instdone1;
}
+out:
/* Reset timer case chip hangs without another request being added */
mod_timer(&dev_priv->hangcheck_timer, jiffies +
DRM_I915_HANGCHECK_PERIOD);
}
--
1.7.1
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