drm/i915: get runtime PM at i915_display_info

Otherwise we may get some WARNs complaining that we're reading a
register while we're suspended.

Testcase: igt/pm_pc8/debugfs-read
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 7522f978677e..23a65168d5ba 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2319,9 +2319,11 @@ static int i915_display_info(struct seq_file *m, void *unused)
 {
         struct drm_info_node *node = (struct drm_info_node *) m->private;
         struct drm_device *dev = node->minor->dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_crtc *crtc;
         struct drm_connector *connector;
 
+        intel_runtime_pm_get(dev_priv);
         drm_modeset_lock_all(dev);
         seq_printf(m, "CRTC info\n");
         seq_printf(m, "---------\n");
@@ -2349,6 +2351,7 @@ static int i915_display_info(struct seq_file *m, void *unused)
                 intel_connector_info(m, connector);
         }
         drm_modeset_unlock_all(dev);
+        intel_runtime_pm_put(dev_priv);
 
         return 0;
 }