Not sure if this was already pushed but:
Acked-by: Alyssa Rosenzweig <[email protected]>On Thu, Nov 28, 2019 at 08:54:27PM +0000, Robin Murphy wrote: > 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 <[email protected]> > --- > drivers/gpu/drm/panfrost/panfrost_devfreq.c | 32 ++++++++++++++------- > 1 file 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); > } > > -- > 2.17.1 >
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