Adding support to detect display idleness by tracking page flip from
user space. Switch to low refresh rate is triggered after 2 seconds of
idleness. The delay is configurable. If there is a page flip or call to
update the plane, then high refresh rate is applied.
The feature is not used in dual-display mode.
v2: Chris's review comments
Modify idleness detection implementation to make it similar to the
implementation of intel_update_fbc/intel_disable_fbc
Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx>
Signed-off-by: Pradeep Bhat <pradeep.bhat@xxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 16 +++++
drivers/gpu/drm/i915/intel_display.c | 14 ++++
drivers/gpu/drm/i915/intel_dp.c | 10 +++
drivers/gpu/drm/i915/intel_drv.h | 4 ++
drivers/gpu/drm/i915/intel_pm.c | 122 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_sprite.c | 2 +
6 files changed, 168 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f8fd045..d7308cc 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -712,6 +712,21 @@ struct i915_fbc {
} no_fbc_reason;
};
+/* configure the number of secs the system must be idle
+ * before DRRS is enabled
+*/
+#define DRRS_IDLENESS_TIME 2000 /* in millisecs */
+
+struct i915_drrs {
+ struct intel_connector *connector;
+ struct intel_dp *dp;
+ struct intel_drrs_work {
+ struct delayed_work work;
+ struct drm_crtc *crtc;
+ int interval;
+ } *drrs_work;
+};
+
struct i915_psr {
bool sink_support;
bool source_ok;
@@ -1400,6 +1415,7 @@ typedef struct drm_i915_private {
int num_plane;
struct i915_fbc fbc;
+ struct i915_drrs drrs;
struct intel_opregion opregion;
struct intel_vbt_data vbt;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a40651e..995d117 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2395,6 +2395,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
}
intel_update_fbc(dev);
+ intel_update_drrs(dev);
intel_edp_psr_update(dev);
mutex_unlock(&dev->struct_mutex);
@@ -3559,6 +3560,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
for_each_encoder_on_crtc(dev, crtc, encoder)
@@ -3600,6 +3602,7 @@ static void haswell_crtc_enable_planes(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
}
@@ -3806,6 +3809,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
}
@@ -3853,6 +3857,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
}
@@ -8226,6 +8231,11 @@ static void intel_unpin_work_fn(struct work_struct *__work)
drm_gem_object_unreference(&work->old_fb_obj->base);
intel_update_fbc(dev);
+
+ /* disable current DRRS work scheduled and restart
+ * to push work by another x seconds
+ */
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
BUG_ON(atomic_read(&to_intel_crtc(work->crtc)->unpin_work_count) == 0);
@@ -8665,6 +8675,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
goto cleanup_pending;
intel_disable_fbc(dev);
+ intel_disable_drrs(dev);
intel_mark_fb_busy(obj, NULL);
mutex_unlock(&dev->struct_mutex);
@@ -10880,6 +10891,7 @@ void intel_modeset_init(struct drm_device *dev)
/* Just in case the BIOS is doing something questionable. */
intel_disable_fbc(dev);
+ intel_disable_drrs(dev);
}
static void
@@ -11286,6 +11298,8 @@ void intel_modeset_cleanup(struct drm_device *dev)
intel_disable_fbc(dev);
+ intel_disable_drrs(dev);
+
intel_disable_gt_powersave(dev);
ironlake_teardown_rc6(dev);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index c473d02..d9c5aca 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3289,11 +3289,18 @@ void intel_dp_encoder_destroy(struct drm_encoder *encoder)
struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
struct intel_dp *intel_dp = &intel_dig_port->dp;
struct drm_device *dev = intel_dp_to_dev(intel_dp);
+ struct drm_i915_private *dev_priv = dev->dev_private;
i2c_del_adapter(&intel_dp->adapter);
drm_encoder_cleanup(encoder);
if (is_edp(intel_dp)) {
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
+ /* DRRS cleanup */
+ if (intel_dp->drrs_state.drrs_support
+ == SEAMLESS_DRRS_SUPPORT) {
+ kfree(dev_priv->drrs.drrs_work);
+ dev_priv->drrs.drrs_work = NULL;
+ }
mutex_lock(&dev->mode_config.mutex);
ironlake_panel_vdd_off_sync(intel_dp);
mutex_unlock(&dev->mode_config.mutex);
@@ -3659,6 +3666,9 @@ intel_dp_drrs_initialize(struct intel_digital_port *intel_dig_port,
intel_connector->panel.edp_downclock =
intel_connector->panel.downclock_mode->clock;
+ intel_init_drrs_idleness_detection(dev,
+ intel_connector, intel_dp);
+
mutex_init(&intel_dp->drrs_state.mutex);
intel_dp->drrs_state.drrs_support = dev_priv->vbt.drrs_mode;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d1c60fa..84cadf8 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -902,6 +902,10 @@ void intel_init_runtime_pm(struct drm_i915_private *dev_priv);
void intel_fini_runtime_pm(struct drm_i915_private *dev_priv);
void ilk_wm_get_hw_state(struct drm_device *dev);
+void intel_init_drrs_idleness_detection(struct drm_device *dev,
+ struct intel_connector *connector, struct intel_dp *dp);
+void intel_update_drrs(struct drm_device *dev);
+void intel_disable_drrs(struct drm_device *dev);
/* intel_sdvo.c */
bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index b35f65e..69f31c5 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -615,6 +615,128 @@ out_disable:
i915_gem_stolen_cleanup_compression(dev);
}
+static void intel_drrs_work_fn(struct work_struct *__work)
+{
+ struct intel_drrs_work *work =
+ container_of(to_delayed_work(__work),
+ struct intel_drrs_work, work);
+ struct drm_device *dev = work->crtc->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ intel_dp_set_drrs_state(work->crtc->dev,
+ dev_priv->drrs.connector->panel.downclock_mode->vrefresh);
+}
+
+static void intel_cancel_drrs_work(struct drm_i915_private *dev_priv)
+{
+ if (dev_priv->drrs.drrs_work == NULL)
+ return;
+
+ DRM_DEBUG_KMS("cancelling pending DRRS enable\n");
+
+ cancel_delayed_work_sync(&dev_priv->drrs.drrs_work->work);
+}
+
+static void intel_enable_drrs(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ intel_cancel_drrs_work(dev_priv);
+
+ if (dev_priv->drrs.dp->drrs_state.drrs_refresh_rate_type
+ != DRRS_LOW_RR) {
+ dev_priv->drrs.drrs_work->crtc = crtc;
+
+ /* Delay the actual enabling to let pageflipping cease and the
+ * display to settle before starting DRRS
+ */
+ schedule_delayed_work(&dev_priv->drrs.drrs_work->work,
+ msecs_to_jiffies(dev_priv->drrs.drrs_work->interval));
+ }
+}
+
+void intel_disable_drrs(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+
+ /* as part of disable DRRS, reset refresh rate to HIGH_RR */
+ if (dev_priv->drrs.dp->drrs_state.drrs_refresh_rate_type
+ == DRRS_LOW_RR) {
+ intel_cancel_drrs_work(dev_priv);
+ intel_dp_set_drrs_state(dev,
+ dev_priv->drrs.connector->panel.fixed_mode->vrefresh);
+ }
+}
+
+/**
+ * intel_update_drrs - enable/disable DRRS as needed
+ * @dev: the drm_device
+ * @update: if set to true, cancel current work and schedule new work.
+* if set to false, cancel current work and disable DRRS.
+*/
+void intel_update_drrs(struct drm_device *dev)
+{
+ struct drm_crtc *crtc = NULL, *tmp_crtc;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ /* if drrs.connector is NULL, then drrs_init did not get called.
+ * which means DRRS is not supported.
+ */
+ if (dev_priv->drrs.connector == NULL) {
+ DRM_INFO("DRRS is not supported.\n");
+ return;
+ }
+
+ list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
+ if (tmp_crtc != NULL && intel_crtc_active(tmp_crtc) &&
+ to_intel_crtc(tmp_crtc)->primary_enabled) {
+ if (crtc) {
+ DRM_DEBUG_KMS(
+ "more than one pipe active, disabling DRRS\n");
+ goto out_drrs_disable;
+ }
+ crtc = tmp_crtc;
+ }
+ }
+
+ if (crtc == NULL) {
+ DRM_INFO("DRRS: crtc not initialized\n");
+ return;
+ }
+
+ intel_disable_drrs(dev);
+
+ /* re-enable idleness detection */
+ intel_enable_drrs(crtc);
+
+out_drrs_disable:
+ intel_disable_drrs(dev);
+}
+
+void intel_init_drrs_idleness_detection(struct drm_device *dev,
+ struct intel_connector *connector,
+ struct intel_dp *dp)
+{
+ struct intel_drrs_work *work;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ work = kzalloc(sizeof(struct intel_drrs_work), GFP_KERNEL);
+ if (!work) {
+ DRM_ERROR("Failed to allocate DRRS work structure\n");
+ return;
+ }
+
+ dev_priv->drrs.connector = connector;
+ dev_priv->drrs.dp = dp;
+
+ work->interval = DRRS_IDLENESS_TIME;
+ INIT_DELAYED_WORK(&work->work, intel_drrs_work_fn);
+
+ dev_priv->drrs.drrs_work = work;
+}
+
static void i915_pineview_get_mem_freq(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 90a3f6d..c3dcffd 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -560,6 +560,7 @@ intel_enable_primary(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
mutex_unlock(&dev->struct_mutex);
}
@@ -579,6 +580,7 @@ intel_disable_primary(struct drm_crtc *crtc)
mutex_lock(&dev->struct_mutex);
if (dev_priv->fbc.plane == intel_crtc->plane)
intel_disable_fbc(dev);
+ intel_disable_drrs(dev);
mutex_unlock(&dev->struct_mutex);
/*
--
1.7.9.5
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