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[109.252.192.57]) by smtp.gmail.com with ESMTPSA id u5sm655596lff.78.2020.12.17.10.08.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Dec 2020 10:08:05 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Mark Brown , Liam Girdwood , Ulf Hansson , Mauro Carvalho Chehab , Rob Herring , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski , "Rafael J. Wysocki" , Kevin Hilman , Peter De Schrijver , Viresh Kumar , Stephen Boyd , Michael Turquette Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH v2 40/48] media: staging: tegra-vde: Support OPP and generic power domain Date: Thu, 17 Dec 2020 21:06:30 +0300 Message-Id: <20201217180638.22748-41-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201217180638.22748-1-digetx@gmail.com> References: <20201217180638.22748-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add OPP and generic power domain support to the video decoder driver. This allows us to utilize a modern GENPD API for newer device-trees and support DVFS of the decoder hardware. Note that older DTBs will continue to work like they did it before this patch. Tested-by: Peter Geis Tested-by: Nicolas Chauvet Signed-off-by: Dmitry Osipenko --- drivers/staging/media/tegra-vde/vde.c | 63 ++++++++++++++++++++++----- 1 file changed, 53 insertions(+), 10 deletions(-) diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c index 28845b5bafaf..5be26b9bd5d8 100644 --- a/drivers/staging/media/tegra-vde/vde.c +++ b/drivers/staging/media/tegra-vde/vde.c @@ -15,11 +15,14 @@ #include #include #include +#include +#include #include #include #include #include +#include #include #include "uapi.h" @@ -918,13 +921,17 @@ static __maybe_unused int tegra_vde_runtime_suspend(struct device *dev) struct tegra_vde *vde = dev_get_drvdata(dev); int err; - err = tegra_powergate_power_off(TEGRA_POWERGATE_VDEC); - if (err) { - dev_err(dev, "Failed to power down HW: %d\n", err); - return err; + if (!dev->pm_domain) { + err = tegra_powergate_power_off(TEGRA_POWERGATE_VDEC); + if (err) { + dev_err(dev, "Failed to power down HW: %d\n", err); + return err; + } } clk_disable_unprepare(vde->clk); + reset_control_release(vde->rst); + dev_pm_opp_set_rate(dev, 0); return 0; } @@ -934,18 +941,44 @@ static __maybe_unused int tegra_vde_runtime_resume(struct device *dev) struct tegra_vde *vde = dev_get_drvdata(dev); int err; - err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VDEC, - vde->clk, vde->rst); + err = dev_pm_opp_set_rate(dev, clk_get_rate(vde->clk)); + if (err) { + dev_err(dev, "Failed to prepare OPP: %d\n", err); + return err; + } + + err = reset_control_acquire(vde->rst); if (err) { - dev_err(dev, "Failed to power up HW : %d\n", err); + dev_err(dev, "Failed to acquire reset: %d\n", err); return err; } + if (!dev->pm_domain) { + err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VDEC, + vde->clk, vde->rst); + if (err) { + dev_err(dev, "Failed to power up HW : %d\n", err); + goto release_reset; + } + } + + err = clk_prepare_enable(vde->clk); + if (err) { + dev_err(dev, "Failed to enable clock: %d\n", err); + goto release_reset; + } + return 0; + +release_reset: + reset_control_release(vde->rst); + + return err; } static int tegra_vde_probe(struct platform_device *pdev) { + struct tegra_core_opp_params opp_params = {}; struct device *dev = &pdev->dev; struct tegra_vde *vde; int irq, err; @@ -999,7 +1032,7 @@ static int tegra_vde_probe(struct platform_device *pdev) return err; } - vde->rst = devm_reset_control_get(dev, NULL); + vde->rst = devm_reset_control_get_exclusive_released(dev, NULL); if (IS_ERR(vde->rst)) { err = PTR_ERR(vde->rst); dev_err(dev, "Could not get VDE reset %d\n", err); @@ -1024,6 +1057,12 @@ static int tegra_vde_probe(struct platform_device *pdev) return err; } + opp_params.init_state = true; + + err = devm_tegra_core_dev_init_opp_table(dev, &opp_params); + if (err && err != -ENODEV) + return err; + vde->iram_pool = of_gen_pool_get(dev->of_node, "iram", 0); if (!vde->iram_pool) { dev_err(dev, "Could not get IRAM pool\n"); @@ -1117,8 +1156,12 @@ static void tegra_vde_shutdown(struct platform_device *pdev) * On some devices bootloader isn't ready to a power-gated VDE on * a warm-reboot, machine will hang in that case. */ - if (pm_runtime_status_suspended(&pdev->dev)) - tegra_vde_runtime_resume(&pdev->dev); + if (pm_runtime_status_suspended(&pdev->dev)) { + if (pdev->dev.pm_domain) + dev_pm_genpd_resume(&pdev->dev); + else + tegra_vde_runtime_resume(&pdev->dev); + } } static __maybe_unused int tegra_vde_pm_suspend(struct device *dev) -- 2.29.2