[PATCH 07/11] drm/i915: kill dev_priv->pc8.gpu_idle

Paulo Zanoni
2014-02-21T16:53:04Z

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

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>
---
drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 10 ++++------
drivers/gpu/drm/i915/intel_display.c | 30 ++----------------------------
drivers/gpu/drm/i915/intel_pm.c | 3 +--
4 files changed, 8 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 34e347f..62d0c0915 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2014,7 +2014,7 @@ 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 a5caa7e..2a2a3a9 100644
--- 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 c64fb7f..796a116 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6812,32 +6812,6 @@ 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))
@@ -8195,7 +8169,7 @@ 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;
}
@@ -8224,7 +8198,7 @@ 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 a6b877a..50b80bb 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5786,10 +5786,9 @@ 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);
--
1.8.5.3