[Intel-gfx] [PATCH 4/5] drm/i915: Idleness detection for DRRS
Vandana Kannan
vandana.kannan at intel.com
Thu Jan 30 04:46:54 CET 2014
On Jan-22-2014 7:56 PM, Jani Nikula wrote:
> On Mon, 23 Dec 2013, Vandana Kannan <vandana.kannan at intel.com> wrote:
>> 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
>>
>> 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 | 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;
>
> I'll probably see this more useful as a module parameter than a field
> here, with 0 meaning disable.
>
Ok. I will look into this.
>> + } *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 d1e1d6e..7778808 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.
>
> There's no update parameter.
>
My miss. I will remove this comment.
>> +*/
>> +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);
>
> The happy day disable, enable, disable sequence seems like a bug.
>
I will make necessary changes..
>> +}
>> +
>> +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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>
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