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drm/i915: kill dev_priv->pc8.gpu_idle

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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>
This commit is contained in:
Paulo Zanoni 2014-02-21 13:52:24 -03:00 committed by Daniel Vetter
parent 36623ef837
commit 86c4ec0d32
4 changed files with 8 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -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));

10
drivers/gpu/drm/i915/i915_drv.h
View File

@ -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;

30
drivers/gpu/drm/i915/intel_display.c
View File

@ -6817,32 +6817,6 @@ static void hsw_update_package_c8(struct drm_device *dev)
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,

3
drivers/gpu/drm/i915/intel_pm.c
View File

@ -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);