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[2003:f1:373a:1900:428d:5cff:feb9:9db8]) by smtp.googlemail.com with ESMTPSA id h66sm8575535wme.41.2020.01.11.16.16.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Jan 2020 16:16:46 -0800 (PST) From: Martin Blumenstingl To: dri-devel@lists.freedesktop.org, alyssa@rosenzweig.io, steven.price@arm.com, tomeu.vizoso@collabora.com, robh@kernel.org Subject: [PATCH RFT v2 3/3] drm/panfrost: Use the mali-supply regulator for control again Date: Sun, 12 Jan 2020 01:16:23 +0100 Message-Id: <20200112001623.2121227-4-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200112001623.2121227-1-martin.blumenstingl@googlemail.com> References: <20200112001623.2121227-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 X-Mailman-Approved-At: Sun, 12 Jan 2020 12:36:09 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-kernel@vger.kernel.org, Martin Blumenstingl , linux-rockchip@lists.infradead.org, sudeep.holla@arm.com, linux-amlogic@lists.infradead.org, robin.murphy@arm.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 Signed-off-by: Martin Blumenstingl --- 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;