[Intel-gfx] [PATCH 2/2] drm/i915: run hsw_disable_pc8() later on resume

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

We want to run intel_uncore_early_sanitize() before we touch any
registers, because on BDW, when we resume, the FPGA_DBG_RM_NOCLAIM bit
is set, so we need to clear it - through intel_uncore_early_sanitize()
- before we do anything else. With the current code, we don't clear
the bit before our first register access, so we print a WARN
complaining about an unclaimed register error.

v1: Was called "drm/i915: run intel_uncore_early_sanitize earlier on
resume"
v2: Was called "drm/i915: run intel_uncore_early_sanitize earlier on
resume on non-VLV"
v3: This one, on top of the intel_resume_prepare() rework.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83094
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index c5b2662..ea7415a 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -665,15 +665,16 @@ static int i915_drm_thaw_early(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int ret = 0;
 
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		hsw_disable_pc8(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv))
+	if (IS_VALLEYVIEW(dev_priv))
 		ret = vlv_resume_prepare(dev_priv, false);
 	if (ret)
 		DRM_ERROR("Resume prepare failed: %d,Continuing resume\n", ret);
 
-
 	intel_uncore_early_sanitize(dev, true);
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		hsw_disable_pc8(dev_priv);
+
 	intel_uncore_sanitize(dev);
 	intel_power_domains_init_hw(dev_priv);
 
-- 
2.1.1