[v2,4/4] drm/panfrost: Register to the Energy Model with devfreq device
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Message ID 20200206134640.11367-5-lukasz.luba@arm.com
State New
Delegated to: Chanwoo Choi
Headers show
  • Add support for devices in the Energy Model
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Commit Message

Lukasz Luba Feb. 6, 2020, 1:46 p.m. UTC
From: Lukasz Luba <lukasz.luba@arm.com>

Add device to the Energy Model framework. It will create a dedicated
and unified data structures used i.e. in the thermal framework.
The power model used in dev_pm_opp subsystem is simplified and created
based on DT 'dynamic-power-coefficient', volatage and frequency. It is
similar to the CPU model used in Energy Aware Scheduler.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
 drivers/gpu/drm/panfrost/panfrost_devfreq.c | 3 +++
 1 file changed, 3 insertions(+)

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diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 413987038fbf..d527a5113950 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -105,6 +105,8 @@  int panfrost_devfreq_init(struct panfrost_device *pfdev)
 	pfdev->devfreq.devfreq = devfreq;
+	dev_pm_opp_of_register_em(dev, NULL);
 	cooling = of_devfreq_cooling_register(dev->of_node, devfreq);
 	if (IS_ERR(cooling))
 		DRM_DEV_INFO(dev, "Failed to register cooling device\n");
@@ -118,6 +120,7 @@  void panfrost_devfreq_fini(struct panfrost_device *pfdev)
 	if (pfdev->devfreq.cooling)
+	dev_pm_opp_of_unregister_em(&pfdev->pdev->dev);