diff mbox

[0277/1094] drm/i915: put runtime PM only at the end of intel_mark_idle

Message ID 1413889294-31328-278-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 10:47 a.m. UTC 
From: Paulo Zanoni <paulo.r.zanoni@intel.com>

Because intel_mark_idle still touches some registers: it needs the
machine to be awake. If you set both the autosuspend and PC8 delays to
zero, you can get a "Device suspended" WARN when gen6_rps_idle touches
registers.

This is not easy to reproduce, but happens once in a while when
running pm_pc8.

Testcase: igt/pm_pc8
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit bb4cdd5345bf344d978e18835583641f2c156ce5)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5d3407f..3154aad 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8215,10 +8215,8 @@  void intel_mark_idle(struct drm_device *dev)
 
 	dev_priv->mm.busy = false;
 
-	hsw_package_c8_gpu_idle(dev_priv);
-
 	if (!i915.powersave)
-		return;
+		goto out;
 
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		if (!crtc->fb)
@@ -8229,6 +8227,9 @@  void intel_mark_idle(struct drm_device *dev)
 
 	if (INTEL_INFO(dev)->gen >= 6)
 		gen6_rps_idle(dev->dev_private);
+
+out:
+	hsw_package_c8_gpu_idle(dev_priv);
 }
 
 void intel_mark_fb_busy(struct drm_i915_gem_object *obj,