From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Otherwise, a simple "cat" to the debugfs file can make the machine use
much more power than needed, and prevent it from runtime suspending.
Related commit:
commit 8452e1d173a16d9812422a2272c4ab0f0ba81057
Author: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Date: Tue Oct 7 17:21:26 2014 +0300
drm/i915: Build workaround list in ring initialization
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx>
Testcase: igt/pm_rpm/debugfs-read
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9600285..36a4baa 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2671,6 +2671,7 @@ static int i915_wa_registers(struct seq_file *m, void *unused)
addr, value, mask, read, ok ? "OK" : "FAIL");
}
+ gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
intel_runtime_pm_put(dev_priv);
mutex_unlock(&dev->struct_mutex);
--
2.1.1
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