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>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 7522f978677e3b41a225dc4e5a63ab9e6d479de8..23a65168d5ba2bb45ff8db225d4ef436cfe4a980 100644 (file)
--- 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;
 }