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Mon, 13 Jan 2020 23:16:29 -0800 (PST) From: Nicolas Boichat To: Rob Herring Subject: [PATCH v3 7/7, RFC] drm/panfrost: devfreq: Add support for 2 regulators Date: Tue, 14 Jan 2020 15:16:02 +0800 Message-Id: <20200114071602.47627-8-drinkcat@chromium.org> X-Mailer: git-send-email 2.25.0.rc1.283.g88dfdc4193-goog In-Reply-To: <20200114071602.47627-1-drinkcat@chromium.org> References: <20200114071602.47627-1-drinkcat@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_231630_853276_53AD3827 X-CRM114-Status: GOOD ( 13.81 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Tomeu Vizoso , David Airlie , linux-kernel@vger.kernel.org, Liam Girdwood , dri-devel@lists.freedesktop.org, Steven Price , Mark Brown , linux-mediatek@lists.infradead.org, Alyssa Rosenzweig , Daniel Vetter , hsinyi@chromium.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 17 +++++++++++++++++ drivers/gpu/drm/panfrost/panfrost_device.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 413987038fbfccb..9c0987a3d71c597 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -79,6 +79,21 @@ 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->comp->num_supplies > 1) { + pfdev->devfreq.dev_opp_table = + dev_pm_opp_set_regulators(dev, + pfdev->comp->supply_names, + pfdev->comp->num_supplies); + 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 +134,8 @@ 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 143eab57180a2e1..30ba11cbf600847 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -108,6 +108,7 @@ 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; -- 2.25.0.rc1.283.g88dfdc4193-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel