[PATCH 11/23] drm/i915: remove dev_priv->pc8.requirements_met

[Paulo Zanoni <przanoni@gmail.com>]

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

The requirements_met variable was used to track two things: enabled
CRTCs and the power well. After the latest chagnes, we get a runtime
PM reference whenever we get any of the power domains, and we get
power domains when we enable CRTCs or the power well, so we should
already be covered, not needing this specific tracking.

v2: - Rebase.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c  |  2 --
 drivers/gpu/drm/i915/i915_drv.h      |  1 -
 drivers/gpu/drm/i915/intel_display.c | 54 ------------------------------------
 drivers/gpu/drm/i915/intel_pm.c      |  5 ++--
 4 files changed, 3 insertions(+), 59 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index c89d30a..36daaa8 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1997,8 +1997,6 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
 	}
 
 	mutex_lock(&dev_priv->pc8.lock);
-	seq_printf(m, "Requirements met: %s\n",
-		   yesno(dev_priv->pc8.requirements_met));
 	seq_printf(m, "GPU idle: %s\n", yesno(!dev_priv->mm.busy));
 	seq_printf(m, "Disable count: %d\n", dev_priv->pc8.disable_count);
 	seq_printf(m, "IRQs disabled: %s\n",
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f53e77d..6ea5c4b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1350,7 +1350,6 @@ struct ilk_wm_values {
  * For more, read "Display Sequences for Package C8" on our documentation.
  */
 struct i915_package_c8 {
-	bool requirements_met;
 	bool irqs_disabled;
 	/* Only true after the delayed work task actually enables it. */
 	bool enabled;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 788b165..0d82241 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6746,59 +6746,6 @@ void hsw_disable_package_c8(struct drm_i915_private *dev_priv)
 	mutex_unlock(&dev_priv->pc8.lock);
 }
 
-static bool hsw_can_enable_package_c8(struct drm_i915_private *dev_priv)
-{
-	struct drm_device *dev = dev_priv->dev;
-	struct intel_crtc *crtc;
-	uint32_t val;
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head)
-		if (crtc->base.enabled)
-			return false;
-
-	/* This case is still possible since we have the i915.disable_power_well
-	 * parameter and also the KVMr or something else might be requesting the
-	 * power well. */
-	val = I915_READ(HSW_PWR_WELL_DRIVER);
-	if (val != 0) {
-		DRM_DEBUG_KMS("Not enabling PC8: power well on\n");
-		return false;
-	}
-
-	return true;
-}
-
-/* Since we're called from modeset_global_resources there's no way to
- * symmetrically increase and decrease the refcount, so we use
- * dev_priv->pc8.requirements_met to track whether we already have the refcount
- * or not.
- */
-static void hsw_update_package_c8(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	bool allow;
-
-	if (!HAS_PC8(dev_priv->dev))
-		return;
-
-	mutex_lock(&dev_priv->pc8.lock);
-
-	allow = hsw_can_enable_package_c8(dev_priv);
-
-	if (allow == dev_priv->pc8.requirements_met)
-		goto done;
-
-	dev_priv->pc8.requirements_met = allow;
-
-	if (allow)
-		__hsw_enable_package_c8(dev_priv);
-	else
-		__hsw_disable_package_c8(dev_priv);
-
-done:
-	mutex_unlock(&dev_priv->pc8.lock);
-}
-
 #define for_each_power_domain(domain, mask)				\
 	for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++)	\
 		if ((1 << (domain)) & (mask))
@@ -6872,7 +6819,6 @@ static void modeset_update_crtc_power_domains(struct drm_device *dev)
 static void haswell_modeset_global_resources(struct drm_device *dev)
 {
 	modeset_update_crtc_power_domains(dev);
-	hsw_update_package_c8(dev);
 }
 
 static int haswell_crtc_mode_set(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 772aa678..962e0d1 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5566,6 +5566,8 @@ void intel_init_runtime_pm(struct drm_i915_private *dev_priv)
 	pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */
 	pm_runtime_mark_last_busy(device);
 	pm_runtime_use_autosuspend(device);
+
+	pm_runtime_put_autosuspend(device);
 }
 
 void intel_fini_runtime_pm(struct drm_i915_private *dev_priv)
@@ -5789,10 +5791,9 @@ void intel_pm_setup(struct drm_device *dev)
 	mutex_init(&dev_priv->rps.hw_lock);
 
 	mutex_init(&dev_priv->pc8.lock);
-	dev_priv->pc8.requirements_met = false;
 	dev_priv->pc8.irqs_disabled = false;
 	dev_priv->pc8.enabled = false;
-	dev_priv->pc8.disable_count = 1; /* requirements_met */
+	dev_priv->pc8.disable_count = 0;
 	INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
 			  intel_gen6_powersave_work);
 }
-- 
1.8.5.3