The Bifrost GPU on MT8183 uses 2 regulators (core and SRAM) for
devfreq, and provides OPP table with 2 sets of voltages.
TODO: This is incomplete as we'll need add support for setting
a pair of voltages as well.
Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 18 ++++++++++++++++++
drivers/gpu/drm/panfrost/panfrost_device.h | 2 ++
2 files changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 413987038fbfccb..5eb0effded7eb09 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -79,6 +79,22 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct devfreq *devfreq;
struct thermal_cooling_device *cooling;
+ /* If we have 2 regulator, we need an OPP table with 2 voltages. */
+ if (pfdev->regulator_sram) {
+ const char * const reg_names[] = { "mali", "sram" };
+
+ pfdev->devfreq.dev_opp_table =
+ dev_pm_opp_set_regulators(dev,
+ reg_names, ARRAY_SIZE(reg_names));
+ if (IS_ERR(pfdev->devfreq.dev_opp_table)) {
+ ret = PTR_ERR(pfdev->devfreq.dev_opp_table);
+ pfdev->devfreq.dev_opp_table = NULL;
+ dev_err(dev,
+ "Failed to init devfreq opp table: %d\n", ret);
+ return ret;
+ }
+ }
+
ret = dev_pm_opp_of_add_table(dev);
if (ret == -ENODEV) /* Optional, continue without devfreq */
return 0;
@@ -119,6 +135,8 @@ 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.dev_opp_table)
+ dev_pm_opp_put_regulators(pfdev->devfreq.dev_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 92d471676fc7823..581da3fe5df8b17 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -91,10 +91,12 @@ struct panfrost_device {
struct {
struct devfreq *devfreq;
struct thermal_cooling_device *cooling;
+ struct opp_table *dev_opp_table;
ktime_t busy_time;
ktime_t idle_time;
ktime_t time_last_update;
atomic_t busy_count;
+ struct panfrost_devfreq_slot slot[NUM_JOB_SLOTS];
} devfreq;
};
--
2.24.1.735.g03f4e72817-goog
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
