drm/i915: kill dev_priv->pc8.gpu_idle

Since the addition of dev_priv->mm.busy, there's no more need for
dev_priv->pc8.gpu_idle, so kill it.

Notice that when you remove gpu_idle, hsw_package_c8_gpu_idle and
hsw_package_c8_gpu_busy become identical to hsw_enable_package_c8 and
hsw_disable_package_c8, so just use them.

Also, when we boot the machine, dev_priv->mm.busy initially considers
the machine as idle. This is opposed to dev_priv->pc8.gpu_idle, which
considered it busy. So dev_priv->pc8.disable_count has to be
initalized to 1 now.

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 8c5e3d0..aef779b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2016,7 +2016,7 @@ 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->pc8.gpu_idle));
+       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",
                   yesno(dev_priv->pc8.irqs_disabled));

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 70a2d75..6503a5c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1321,11 +1321,10 @@ struct ilk_wm_values {
  * Ideally every piece of our code that needs PC8+ disabled would call
  * hsw_disable_package_c8, which would increment disable_count and prevent the
  * system from reaching PC8+. But we don't have a symmetric way to do this for
- * everything, so we have the requirements_met and gpu_idle variables. When we
- * switch requirements_met or gpu_idle to true we decrease disable_count, and
- * increase it in the opposite case. The requirements_met variable is true when
- * all the CRTCs, encoders and the power well are disabled. The gpu_idle
- * variable is true when the GPU is idle.
+ * everything, so we have the requirements_met variable. When we switch
+ * requirements_met to true we decrease disable_count, and increase it in the
+ * opposite case. The requirements_met variable is true when all the CRTCs,
+ * encoders and the power well are disabled.
  *
  * In addition to everything, we only actually enable PC8+ if disable_count
  * stays at zero for at least some seconds. This is implemented with the
@@ -1348,7 +1347,6 @@ struct ilk_wm_values {
  */
 struct i915_package_c8 {
        bool requirements_met;
-       bool gpu_idle;
        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 82ef8bf..680f4c7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6817,32 +6817,6 @@ done:
        mutex_unlock(&dev_priv->pc8.lock);
 }
 
-static void hsw_package_c8_gpu_idle(struct drm_i915_private *dev_priv)
-{
-       if (!HAS_PC8(dev_priv->dev))
-               return;
-
-       mutex_lock(&dev_priv->pc8.lock);
-       if (!dev_priv->pc8.gpu_idle) {
-               dev_priv->pc8.gpu_idle = true;
-               __hsw_enable_package_c8(dev_priv);
-       }
-       mutex_unlock(&dev_priv->pc8.lock);
-}
-
-static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv)
-{
-       if (!HAS_PC8(dev_priv->dev))
-               return;
-
-       mutex_lock(&dev_priv->pc8.lock);
-       if (dev_priv->pc8.gpu_idle) {
-               dev_priv->pc8.gpu_idle = false;
-               __hsw_disable_package_c8(dev_priv);
-       }
-       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))
@@ -8200,7 +8174,7 @@ void intel_mark_busy(struct drm_device *dev)
        if (dev_priv->mm.busy)
                return;
 
-       hsw_package_c8_gpu_busy(dev_priv);
+       hsw_disable_package_c8(dev_priv);
        i915_update_gfx_val(dev_priv);
        dev_priv->mm.busy = true;
 }
@@ -8229,7 +8203,7 @@ void intel_mark_idle(struct drm_device *dev)
                gen6_rps_idle(dev->dev_private);
 
 out:
-       hsw_package_c8_gpu_idle(dev_priv);
+       hsw_enable_package_c8(dev_priv);
 }
 
 void intel_mark_fb_busy(struct drm_i915_gem_object *obj,

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e8fc428..2ded0f6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5809,10 +5809,9 @@ void intel_pm_setup(struct drm_device *dev)
 
        mutex_init(&dev_priv->pc8.lock);
        dev_priv->pc8.requirements_met = false;
-       dev_priv->pc8.gpu_idle = false;
        dev_priv->pc8.irqs_disabled = false;
        dev_priv->pc8.enabled = false;
-       dev_priv->pc8.disable_count = 2; /* requirements_met + gpu_idle */
+       dev_priv->pc8.disable_count = 1; /* requirements_met */
        INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work);
        INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
                          intel_gen6_powersave_work);