Re: [PATCH 19/31] drm/panfrost: convert to use devm_pm_opp_* API

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On 01/01/2021 16:54, Yangtao Li wrote:
Use devm_pm_opp_* API to simplify code, and remove opp_table
from panfrost_devfreq.

Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx>

Reviewed-by: Steven Price <steven.price@xxxxxxx>

---
  drivers/gpu/drm/panfrost/panfrost_devfreq.c | 34 ++++++---------------
  drivers/gpu/drm/panfrost/panfrost_devfreq.h |  1 -
  2 files changed, 10 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index f44d28fad085..c42fa9eb43b1 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -92,25 +92,26 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
  	struct thermal_cooling_device *cooling;
  	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
- opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
+	opp_table = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
  					      pfdev->comp->num_supplies);
  	if (IS_ERR(opp_table)) {
  		ret = PTR_ERR(opp_table);
  		/* Continue if the optional regulator is missing */
  		if (ret != -ENODEV) {
  			DRM_DEV_ERROR(dev, "Couldn't set OPP regulators\n");
-			goto err_fini;
+			return ret;
  		}
-	} else {
-		pfdevfreq->regulators_opp_table = opp_table;
  	}
- ret = dev_pm_opp_of_add_table(dev);
+	ret = devm_pm_opp_of_add_table(dev);
  	if (ret) {
+		if (!IS_ERR(opp_table))
+			devm_pm_opp_put_regulators(dev, opp_table);
+
  		/* Optional, continue without devfreq */
  		if (ret == -ENODEV)
  			ret = 0;
-		goto err_fini;
+		return ret;
  	}
  	pfdevfreq->opp_of_table_added = true;
@@ -121,10 +122,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
  	cur_freq = clk_get_rate(pfdev->clock);
opp = devfreq_recommended_opp(dev, &cur_freq, 0);
-	if (IS_ERR(opp)) {
-		ret = PTR_ERR(opp);
-		goto err_fini;
-	}
+	if (IS_ERR(opp))
+		return PTR_ERR(opp);
panfrost_devfreq_profile.initial_freq = cur_freq;
  	dev_pm_opp_put(opp);
@@ -133,8 +132,7 @@ 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");
-		ret = PTR_ERR(devfreq);
-		goto err_fini;
+		return PTR_ERR(devfreq);
  	}
  	pfdevfreq->devfreq = devfreq;
@@ -145,10 +143,6 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
  		pfdevfreq->cooling = cooling;
return 0;
-
-err_fini:
-	panfrost_devfreq_fini(pfdev);
-	return ret;
  }
void panfrost_devfreq_fini(struct panfrost_device *pfdev)
@@ -159,14 +153,6 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev)
  		devfreq_cooling_unregister(pfdevfreq->cooling);
  		pfdevfreq->cooling = NULL;
  	}
-
-	if (pfdevfreq->opp_of_table_added) {
-		dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
-		pfdevfreq->opp_of_table_added = false;
-	}
-
-	dev_pm_opp_put_regulators(pfdevfreq->regulators_opp_table);
-	pfdevfreq->regulators_opp_table = NULL;
  }
void panfrost_devfreq_resume(struct panfrost_device *pfdev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index db6ea48e21f9..a51854cc8c06 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -15,7 +15,6 @@ struct panfrost_device;
struct panfrost_devfreq {
  	struct devfreq *devfreq;
-	struct opp_table *regulators_opp_table;
  	struct thermal_cooling_device *cooling;
  	bool opp_of_table_added;




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