dev_pm_opp_set_rate() needs a reference to the regulator which should be updated when updating the GPU frequency. The name of the regulator has to be passed at initialization-time using dev_pm_opp_set_regulators(). Add the call to dev_pm_opp_set_regulators() so dev_pm_opp_set_rate() will update the GPU regulator when updating the frequency (just like we did this manually before when we open-coded dev_pm_opp_set_rate()).
Fixes: 221bc77914cbcc ("drm/panfrost: Use generic code for devfreq") Reported-by: Robin Murphy robin.murphy@arm.com Signed-off-by: Martin Blumenstingl martin.blumenstingl@googlemail.com --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 33 +++++++++++++++++---- drivers/gpu/drm/panfrost/panfrost_device.h | 1 + 2 files changed, 29 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 170f6c8c9651..3b580a0123e1 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -74,6 +74,7 @@ static struct devfreq_dev_profile panfrost_devfreq_profile = { int panfrost_devfreq_init(struct panfrost_device *pfdev) { int ret; + struct opp_table *opp_table; struct dev_pm_opp *opp; unsigned long cur_freq; struct device *dev = &pfdev->pdev->dev; @@ -84,9 +85,22 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) /* Optional, continue without devfreq */ return 0;
+ opp_table = dev_pm_opp_set_regulators(dev, + (const char *[]){ "mali" }, + 1); + if (IS_ERR(opp_table)) { + ret = PTR_ERR(opp_table); + + /* Continue if the optional regulator is missing */ + if (ret != -ENODEV) + return ret; + } else { + pfdev->devfreq.regulators_opp_table = opp_table; + } + ret = dev_pm_opp_of_add_table(dev); if (ret) - return ret; + goto err_opp_put_regulators;
panfrost_devfreq_reset(pfdev);
@@ -94,8 +108,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
opp = devfreq_recommended_opp(dev, &cur_freq, 0); if (IS_ERR(opp)) { - dev_pm_opp_of_remove_table(dev); - return PTR_ERR(opp); + ret = PTR_ERR(opp); + goto err_opp_of_remove_table; }
panfrost_devfreq_profile.initial_freq = cur_freq; @@ -105,8 +119,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) 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); + ret = PTR_ERR(devfreq); + goto err_opp_of_remove_table; } pfdev->devfreq.devfreq = devfreq;
@@ -117,6 +131,13 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) pfdev->devfreq.cooling = cooling;
return 0; + +err_opp_of_remove_table: + dev_pm_opp_of_remove_table(dev); +err_opp_put_regulators: + if (pfdev->devfreq.regulators_opp_table) + dev_pm_opp_put_regulators(pfdev->devfreq.regulators_opp_table); + return ret; }
void panfrost_devfreq_fini(struct panfrost_device *pfdev) @@ -124,6 +145,8 @@ 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); + if (pfdev->devfreq.regulators_opp_table) + dev_pm_opp_put_regulators(pfdev->devfreq.regulators_opp_table); }
void panfrost_devfreq_resume(struct panfrost_device *pfdev) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index 06713811b92c..4878b239e301 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -85,6 +85,7 @@ struct panfrost_device {
struct { struct devfreq *devfreq; + struct opp_table *regulators_opp_table; struct thermal_cooling_device *cooling; ktime_t busy_time; ktime_t idle_time;