From fd587ff01d59554144e2fd20f4113638a45c7c4e Mon Sep 17 00:00:00 2001 From: Clément Péron Date: Fri, 10 Jul 2020 11:54:05 +0200 Subject: drm/panfrost: add regulators to devfreq Some OPP tables specify voltage for each frequency. Devfreq can handle these regulators but they should be get only 1 time to avoid issue and know who is in charge. If OPP table is probe don't init regulator. Reviewed-by: Steven Price Reviewed-by: Alyssa Rosenzweig Signed-off-by: Clément Péron Signed-off-by: Rob Herring Link: https://patchwork.freedesktop.org/patch/msgid/20200710095409.407087-11-peron.clem@gmail.com --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 29 +++++++++++++++++++++++++---- drivers/gpu/drm/panfrost/panfrost_devfreq.h | 2 ++ drivers/gpu/drm/panfrost/panfrost_device.c | 9 ++++++--- 3 files changed, 33 insertions(+), 7 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index d9007f44b772..8ab025d0035f 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -93,14 +93,30 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) unsigned long cur_freq; struct device *dev = &pfdev->pdev->dev; struct devfreq *devfreq; + struct opp_table *opp_table; struct thermal_cooling_device *cooling; struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq; + opp_table = dev_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; + } + } else { + pfdevfreq->regulators_opp_table = opp_table; + } + ret = dev_pm_opp_of_add_table(dev); - if (ret == -ENODEV) /* Optional, continue without devfreq */ - return 0; - else if (ret) - return ret; + if (ret) { + /* Optional, continue without devfreq */ + if (ret == -ENODEV) + ret = 0; + goto err_fini; + } pfdevfreq->opp_of_table_added = true; spin_lock_init(&pfdevfreq->lock); @@ -153,6 +169,11 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev) dev_pm_opp_of_remove_table(&pfdev->pdev->dev); pfdevfreq->opp_of_table_added = false; } + + if (pfdevfreq->regulators_opp_table) { + 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 210269944687..db6ea48e21f9 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h @@ -8,12 +8,14 @@ #include struct devfreq; +struct opp_table; struct thermal_cooling_device; 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; diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index f1474b961def..e6896733838a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -225,9 +225,12 @@ int panfrost_device_init(struct panfrost_device *pfdev) goto out_clk; } - err = panfrost_regulator_init(pfdev); - if (err) - goto out_devfreq; + /* OPP will handle regulators */ + if (!pfdev->pfdevfreq.opp_of_table_added) { + err = panfrost_regulator_init(pfdev); + if (err) + goto out_devfreq; + } err = panfrost_reset_init(pfdev); if (err) { -- cgit v1.2.3