[Intel-gfx] [PATCH 4/5] drm/i915: Idleness detection for DRRS
Vandana Kannan
vandana.kannan at intel.com
Fri Feb 14 11:02:21 CET 2014
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 Wilson's review comments incorporated.
Modify idleness detection implementation to make it similar to the
implementation of intel_update_fbc/intel_disable_fbc
v3: Internal review comments incorporated
Add NULL pointer check in intel_disable_drrs.
Add drrs calls in i9xx_crtc_enable/disable and valleyview_crtc_enable.
v4: Jani's review comments incorporated.
Change in sequence in intel_update_drrs. Comment modified to remove details
of update param. Modified DRRS idleness interval to a module parameter.
Signed-off-by: Vandana Kannan <vandana.kannan at intel.com>
Signed-off-by: Pradeep Bhat <pradeep.bhat at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 6 ++
drivers/gpu/drm/i915/i915_params.c | 8 ++
drivers/gpu/drm/i915/intel_display.c | 16 ++++
drivers/gpu/drm/i915/intel_dp.c | 9 +++
drivers/gpu/drm/i915/intel_drv.h | 5 +-
drivers/gpu/drm/i915/intel_pm.c | 134 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_sprite.c | 2 +
7 files changed, 179 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3dd1d7e..8cb91d1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -777,6 +777,11 @@ struct i915_fbc {
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 {
@@ -1976,6 +1981,7 @@ struct i915_params {
bool prefault_disable;
bool reset;
int invert_brightness;
+ int drrs_interval;
};
extern struct i915_params i915 __read_mostly;
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index c743057..69f8b83 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -47,6 +47,7 @@ struct i915_params i915 __read_mostly = {
.prefault_disable = 0,
.reset = true,
.invert_brightness = 0,
+ .drrs_interval = 2000,
};
module_param_named(modeset, i915.modeset, int, 0400);
@@ -153,3 +154,10 @@ MODULE_PARM_DESC(invert_brightness,
"report PCI device ID, subsystem vendor and subsystem device ID "
"to dri-devel at lists.freedesktop.org, if your machine needs it. "
"It will then be included in an upcoming module version.");
+
+module_param_named(drrs_interval, i915.drrs_interval, int, 0600);
+MODULE_PARM_DESC(drrs_interval,
+ "DRRS idleness detection interval (default: 2000 ms)."
+ "If this field is set to 0, then seamless DRRS feature "
+ "based on idleness detection is disabled."
+ "The interval is to be set in milliseconds.");
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4d4a0d9..86cd603 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2410,6 +2410,7 @@ 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);
@@ -3598,6 +3599,7 @@ 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)
@@ -3639,6 +3641,7 @@ 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);
}
@@ -3845,6 +3848,7 @@ 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);
}
@@ -3892,6 +3896,7 @@ 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);
}
@@ -4176,6 +4181,7 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
intel_crtc_update_cursor(crtc, true);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
for_each_encoder_on_crtc(dev, crtc, encoder)
encoder->enable(encoder);
@@ -4221,6 +4227,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
intel_crtc_dpms_overlay(intel_crtc, true);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
for_each_encoder_on_crtc(dev, crtc, encoder)
encoder->enable(encoder);
@@ -4286,6 +4293,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
intel_update_watermarks(crtc);
intel_update_fbc(dev);
+ intel_update_drrs(dev);
}
static void i9xx_crtc_off(struct drm_crtc *crtc)
@@ -8281,6 +8289,10 @@ static void intel_unpin_work_fn(struct work_struct *__work)
drm_gem_object_unreference(&work->pending_flip_obj->base);
drm_gem_object_unreference(&work->old_fb_obj->base);
+ /* disable current DRRS work scheduled and restart
+ * to push work by another x seconds
+ */
+ intel_update_drrs(dev);
intel_update_fbc(dev);
mutex_unlock(&dev->struct_mutex);
@@ -8722,6 +8734,7 @@ 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);
@@ -11055,6 +11068,7 @@ 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
@@ -11461,6 +11475,8 @@ 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 1933675..3407af6 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3411,11 +3411,17 @@ 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.type == SEAMLESS_DRRS_SUPPORT) {
+ kfree(dev_priv->drrs.drrs_work);
+ dev_priv->drrs.drrs_work = NULL;
+ }
mutex_lock(&dev->mode_config.mutex);
edp_panel_vdd_off_sync(intel_dp);
mutex_unlock(&dev->mode_config.mutex);
@@ -3799,6 +3805,9 @@ intel_dp_drrs_initialize(struct intel_digital_port *intel_dig_port,
dev_priv->drrs.connector = intel_connector;
dev_priv->drrs.dp = intel_dp;
+ intel_init_drrs_idleness_detection(dev,
+ intel_connector, intel_dp);
+
mutex_init(&intel_dp->drrs_state.mutex);
intel_dp->drrs_state.type = dev_priv->vbt.drrs_type;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 4f7c816..c8d6aa2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -911,7 +911,10 @@ void intel_runtime_pm_put(struct drm_i915_private *dev_priv);
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 9ab3883..2b84864 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -618,6 +618,140 @@ 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.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;
+
+ if (dev_priv->drrs.dp == NULL) {
+ DRM_DEBUG_KMS("DRRS is not supported.\n");
+ return;
+ }
+
+ /* as part of disable DRRS, reset refresh rate to HIGH_RR */
+ if (dev_priv->drrs.dp->drrs_state.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
+*/
+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_DEBUG_KMS("DRRS is not supported.\n");
+ return;
+ }
+
+ if (dev_priv->drrs.connector->panel.downclock_mode == NULL) {
+ DRM_DEBUG_KMS(
+ "No downclock mode found. DRRS 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");
+ intel_disable_drrs(dev);
+ return;
+ }
+ crtc = tmp_crtc;
+ }
+ }
+
+ if (crtc == NULL) {
+ DRM_DEBUG_KMS("DRRS: crtc not initialized\n");
+ return;
+ }
+
+ intel_disable_drrs(dev);
+
+ /* re-enable idleness detection */
+ intel_enable_drrs(crtc);
+}
+
+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;
+
+ if (i915.drrs_interval == 0) {
+ DRM_INFO("DRRS disable by flag\n");
+ dev_priv->drrs.connector = NULL;
+ dev_priv->drrs.dp = NULL;
+ return;
+ }
+
+ work = kzalloc(sizeof(struct intel_drrs_work), GFP_KERNEL);
+ if (!work) {
+ DRM_ERROR("Failed to allocate DRRS work structure\n");
+ dev_priv->drrs.connector = NULL;
+ dev_priv->drrs.dp = NULL;
+ return;
+ }
+
+ work->interval = i915.drrs_interval;
+ 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 336ae6c..6c465cd 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -547,6 +547,7 @@ 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);
}
@@ -566,6 +567,7 @@ 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
More information about the Intel-gfx
mailing list