From b913b33c43db849778f044d4b9e74b167898a9bc Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 13 Jul 2016 09:10:31 +0100
Subject: [PATCH] drm/i915: Flush GT idle status upon reset
Upon resetting the GPU, we force the engines to be idle by clearing
their request lists. However, I neglected to clear the GT active status
and so the next request following the reset was not marking the device
as busy again. (We had to wait until any outstanding retire worker
finally ran and cleared the active status.)
Fixes: 67d97da34917 ("drm/i915: Only start retire worker when idle")
Testcase: igt/pm_rps/reset
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468397438-21226-1-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ead0e48d3dc07..002ecc6593ebd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3169,6 +3169,8 @@ static void i915_gem_reset_engine_cleanup(struct intel_engine_cs *engine)
}
intel_ring_init_seqno(engine, engine->last_submitted_seqno);
+
+ engine->i915->gt.active_engines &= ~intel_engine_flag(engine);
}
void i915_gem_reset(struct drm_device *dev)
@@ -3186,6 +3188,7 @@ void i915_gem_reset(struct drm_device *dev)
for_each_engine(engine, dev_priv)
i915_gem_reset_engine_cleanup(engine);
+ mod_delayed_work(dev_priv->wq, &dev_priv->gt.idle_work, 0);
i915_gem_context_reset(dev);