This reverts commit b12e0ee2080c ("drm/i915: Enable RC6 immediately"),
as it was never meant to be sent anywhere other than the bug report for
experimentation.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
---
drivers/gpu/drm/i915/i915_drv.c | 5 +-
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem.c | 2 +
drivers/gpu/drm/i915/i915_gem_request.c | 1 +
drivers/gpu/drm/i915/intel_display.c | 1 -
drivers/gpu/drm/i915/intel_drv.h | 5 +-
drivers/gpu/drm/i915/intel_pm.c | 96 ++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_uncore.c | 2 +-
8 files changed, 105 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 84e4018b18a7..83afdd0597b5 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1630,6 +1630,7 @@ static int i915_drm_resume(struct drm_device *dev)
intel_opregion_notify_adapter(dev_priv, PCI_D0);
+ intel_autoenable_gt_powersave(dev_priv);
drm_kms_helper_poll_enable(dev);
enable_rpm_wakeref_asserts(dev_priv);
@@ -1811,8 +1812,7 @@ int i915_reset(struct drm_i915_private *dev_priv)
* previous concerns that it doesn't respond well to some forms
* of re-init after reset.
*/
- if (INTEL_GEN(dev_priv) > 5)
- intel_enable_gt_powersave(dev_priv);
+ intel_autoenable_gt_powersave(dev_priv);
return 0;
@@ -2440,7 +2440,6 @@ static int intel_runtime_resume(struct device *device)
i915_gem_init_swizzling(dev);
intel_runtime_pm_enable_interrupts(dev_priv);
- intel_enable_gt_powersave(dev_priv);
/*
* On VLV/CHV display interrupts are part of the display
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 52be86e3e07d..c97724d380d3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1192,6 +1192,7 @@ struct intel_gen6_power_mgmt {
bool client_boost;
bool enabled;
+ struct delayed_work autoenable_work;
unsigned boosts;
/* manual wa residency calculations */
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 90b9f46d9432..40047eb48826 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4355,6 +4355,8 @@ i915_gem_suspend(struct drm_device *dev)
struct drm_i915_private *dev_priv = to_i915(dev);
int ret = 0;
+ intel_suspend_gt_powersave(dev_priv);
+
mutex_lock(&dev->struct_mutex);
/* We have to flush all the executing contexts to main memory so
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c
b/drivers/gpu/drm/i915/i915_gem_request.c
index b20b00410510..60a3a343b3a8 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -405,6 +405,7 @@ static void i915_gem_mark_busy(const struct intel_engine_cs
*engine)
intel_runtime_pm_get_noresume(dev_priv);
dev_priv->gt.awake = true;
+ intel_enable_gt_powersave(dev_priv);
i915_update_gfx_val(dev_priv);
if (INTEL_GEN(dev_priv) >= 6)
gen6_rps_busy(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 00116092b18a..78beb7e9d384 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15502,7 +15502,6 @@ void intel_modeset_init_hw(struct drm_device *dev)
dev_priv->atomic_cdclk_freq = dev_priv->cdclk_freq;
intel_init_clock_gating(dev);
- intel_enable_gt_powersave(dev_priv);
}
/*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8bb98ec32da3..e74d851868c5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1691,9 +1691,12 @@ void intel_pm_setup(struct drm_device *dev);
void intel_gpu_ips_init(struct drm_i915_private *dev_priv);
void intel_gpu_ips_teardown(void);
void intel_init_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv);
void intel_enable_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_autoenable_gt_powersave(struct drm_i915_private *dev_priv);
void intel_disable_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv);
void gen6_rps_busy(struct drm_i915_private *dev_priv);
void gen6_rps_reset_ei(struct drm_i915_private *dev_priv);
void gen6_rps_idle(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 45753e1aa7f1..64d628c915a3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6526,6 +6526,8 @@ void intel_init_gt_powersave(struct drm_i915_private
*dev_priv)
dev_priv->rps.boost_freq = dev_priv->rps.max_freq;
mutex_unlock(&dev_priv->rps.hw_lock);
+
+ intel_autoenable_gt_powersave(dev_priv);
}
void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
@@ -6539,10 +6541,31 @@ void intel_cleanup_gt_powersave(struct drm_i915_private
*dev_priv)
intel_runtime_pm_put(dev_priv);
}
+/**
+ * intel_suspend_gt_powersave - suspend PM work and helper threads
+ * @dev_priv: i915 device
+ *
+ * We don't want to disable RC6 or other features here, we just want
+ * to make sure any work we've queued has finished and won't bother
+ * us while we're suspended.
+ */
+void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv)
+{
+ if (INTEL_GEN(dev_priv) < 6)
+ return;
+
+ if (cancel_delayed_work_sync(&dev_priv->rps.autoenable_work))
+ intel_runtime_pm_put(dev_priv);
+
+ /* gen6_rps_idle() will be called later to disable interrupts */
+}
+
void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
{
dev_priv->rps.enabled = true; /* force disabling */
intel_disable_gt_powersave(dev_priv);
+
+ gen6_reset_rps_interrupts(dev_priv);
}
void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
@@ -6567,12 +6590,13 @@ void intel_disable_gt_powersave(struct drm_i915_private
*dev_priv)
dev_priv->rps.enabled = false;
mutex_unlock(&dev_priv->rps.hw_lock);
-
- gen6_reset_rps_interrupts(dev_priv);
}
void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
{
+ /* We shouldn't be disabling as we submit, so this should be less
+ * racy than it appears!
+ */
if (READ_ONCE(dev_priv->rps.enabled))
return;
@@ -6608,9 +6632,75 @@ void intel_enable_gt_powersave(struct drm_i915_private
*dev_priv)
WARN_ON(dev_priv->rps.efficient_freq < dev_priv->rps.min_freq);
WARN_ON(dev_priv->rps.efficient_freq > dev_priv->rps.max_freq);
+ dev_priv->rps.enabled = true;
mutex_unlock(&dev_priv->rps.hw_lock);
}
+static void __intel_autoenable_gt_powersave(struct work_struct *work)
+{
+ struct drm_i915_private *dev_priv =
+ container_of(work, typeof(*dev_priv), rps.autoenable_work.work);
+ struct intel_engine_cs *rcs;
+ struct drm_i915_gem_request *req;
+
+ if (READ_ONCE(dev_priv->rps.enabled))
+ goto out;
+
+ rcs = &dev_priv->engine[RCS];
+ if (rcs->last_context)
+ goto out;
+
+ if (!rcs->init_context)
+ goto out;
+
+ mutex_lock(&dev_priv->drm.struct_mutex);
+
+ req = i915_gem_request_alloc(rcs, dev_priv->kernel_context);
+ if (IS_ERR(req))
+ goto unlock;
+
+ if (!i915.enable_execlists && i915_switch_context(req) == 0)
+ rcs->init_context(req);
+
+ /* Mark the device busy, calling intel_enable_gt_powersave() */
+ i915_add_request_no_flush(req);
+
+unlock:
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+out:
+ intel_runtime_pm_put(dev_priv);
+}
+
+void intel_autoenable_gt_powersave(struct drm_i915_private *dev_priv)
+{
+ if (READ_ONCE(dev_priv->rps.enabled))
+ return;
+
+ if (IS_IRONLAKE_M(dev_priv)) {
+ ironlake_enable_drps(dev_priv);
+ mutex_lock(&dev_priv->drm.struct_mutex);
+ intel_init_emon(dev_priv);
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+ } else if (INTEL_INFO(dev_priv)->gen >= 6) {
+ /*
+ * PCU communication is slow and this doesn't need to be
+ * done at any specific time, so do this out of our fast path
+ * to make resume and init faster.
+ *
+ * We depend on the HW RC6 power context save/restore
+ * mechanism when entering D3 through runtime PM suspend. So
+ * disable RPM until RPS/RC6 is properly setup. We can only
+ * get here via the driver load/system resume/runtime resume
+ * paths, so the _noresume version is enough (and in case of
+ * runtime resume it's necessary).
+ */
+ if (queue_delayed_work(dev_priv->wq,
+ &dev_priv->rps.autoenable_work,
+ round_jiffies_up_relative(HZ)))
+ intel_runtime_pm_get_noresume(dev_priv);
+ }
+}
+
static void ibx_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
@@ -7716,6 +7806,8 @@ void intel_pm_setup(struct drm_device *dev)
mutex_init(&dev_priv->rps.hw_lock);
spin_lock_init(&dev_priv->rps.client_lock);
+ INIT_DELAYED_WORK(&dev_priv->rps.autoenable_work,
+ __intel_autoenable_gt_powersave);
INIT_LIST_HEAD(&dev_priv->rps.clients);
dev_priv->pm.suspended = false;
diff --git a/drivers/gpu/drm/i915/intel_uncore.c
b/drivers/gpu/drm/i915/intel_uncore.c
index 2d4bca456b00..43f833901b8e 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -435,7 +435,7 @@ void intel_uncore_sanitize(struct drm_i915_private
*dev_priv)
i915.enable_rc6 = sanitize_rc6_option(dev_priv, i915.enable_rc6);
/* BIOS often leaves RC6 enabled, but disable it for hw init */
- intel_disable_gt_powersave(dev_priv);
+ intel_sanitize_gt_powersave(dev_priv);
}
static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
--
2.8.1
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