diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2019-11-28 20:54:27 +0000 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2019-12-06 11:11:59 -0600 |
| commit | bc1152b086c1a99971ef3d351c9e1fd5814a6e46 (patch) | |
| tree | a61c8a2ed9df9dcb40da77faaf8133b647b8ccf8 /drivers/gpu/drm/panfrost | |
| parent | 1ca3fd96f958291daa50693b4a50cd3df4b411f1 (diff) | |
drm/panfrost: Register devfreq cooling device
When we have devfreq, also try to register a basic cooling device in
case GPU workloads manage to hit thermal throttling thresholds.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/21f228099321f460d62e0ab7c77b2d2213dd4da8.1574974319.git.robin.murphy@arm.com
Diffstat (limited to 'drivers/gpu/drm/panfrost')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 4c4e8a30a1ac..fe8ee77c96e4 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright 2019 Collabora ltd. */ #include <linux/devfreq.h> +#include <linux/devfreq_cooling.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> #include <linux/clk.h> @@ -81,8 +82,11 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) int ret; struct dev_pm_opp *opp; unsigned long cur_freq; + struct device *dev = &pfdev->pdev->dev; + struct devfreq *devfreq; + struct thermal_cooling_device *cooling; - ret = dev_pm_opp_of_add_table(&pfdev->pdev->dev); + ret = dev_pm_opp_of_add_table(dev); if (ret == -ENODEV) /* Optional, continue without devfreq */ return 0; else if (ret) @@ -92,29 +96,35 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) cur_freq = clk_get_rate(pfdev->clock); - opp = devfreq_recommended_opp(&pfdev->pdev->dev, &cur_freq, 0); + opp = devfreq_recommended_opp(dev, &cur_freq, 0); if (IS_ERR(opp)) return PTR_ERR(opp); panfrost_devfreq_profile.initial_freq = cur_freq; dev_pm_opp_put(opp); - pfdev->devfreq.devfreq = devm_devfreq_add_device(&pfdev->pdev->dev, - &panfrost_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND, - NULL); - if (IS_ERR(pfdev->devfreq.devfreq)) { - DRM_DEV_ERROR(&pfdev->pdev->dev, "Couldn't initialize GPU devfreq\n"); - ret = PTR_ERR(pfdev->devfreq.devfreq); - pfdev->devfreq.devfreq = NULL; - dev_pm_opp_of_remove_table(&pfdev->pdev->dev); - return ret; + devfreq = devm_devfreq_add_device(dev, &panfrost_devfreq_profile, + DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL); + if (IS_ERR(devfreq)) { + DRM_DEV_ERROR(dev, "Couldn't initialize GPU devfreq\n"); + dev_pm_opp_of_remove_table(dev); + return PTR_ERR(devfreq); } + pfdev->devfreq.devfreq = devfreq; + + cooling = of_devfreq_cooling_register(dev->of_node, devfreq); + if (IS_ERR(cooling)) + DRM_DEV_INFO(dev, "Failed to register cooling device\n"); + else + pfdev->devfreq.cooling = cooling; return 0; } void panfrost_devfreq_fini(struct panfrost_device *pfdev) { + if (pfdev->devfreq.cooling) + devfreq_cooling_unregister(pfdev->devfreq.cooling); dev_pm_opp_of_remove_table(&pfdev->pdev->dev); } |