From patchwork Tue Jun 13 09:52:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 13278345 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BD320C7EE2E for ; Tue, 13 Jun 2023 10:35:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0566010E0A8; Tue, 13 Jun 2023 10:35:19 +0000 (UTC) X-Greylist: delayed 2567 seconds by postgrey-1.36 at gabe; Tue, 13 Jun 2023 10:35:17 UTC Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5D5AD10E0A8 for ; Tue, 13 Jun 2023 10:35:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject: Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=2wBSbgLa93Hhq7JFpc4GMQOjRKUGshimnZAjB38+QtI=; b=yYJKcFtBdrKHarHEciqy4jzIDT SpixS67atMGA132TSamQorM4iLDuG4DX2YsEDKBFujshnJMUe+8yAx/rxmd9o2pdNFvl9hefM/Clk A6uI9eZwGNWtOnSSZHKINlRE+am47MUzXQZ2W/USFVPaYgjJX3W7pFFvm4UJlIVs2WprlEtjhvJbA S3UP9M7c1V+EZ/aQAjPuQX4cUQT5B/UOF4/2b/xkQpvCZKV8tDoqymBoLpj0WqXMpR/pdxIjzHKju BzEU/e5fBBfaLiwSWCPfPchtsqzWbVK6eBoS1NxZCNnSz5TmznxUgMmMEC/BzYw0SEH9TKlMZGllc Z4XHtY0w==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1q90hL-007a9U-JZ; Tue, 13 Jun 2023 12:52:23 +0300 From: Mikko Perttunen To: Thierry Reding Subject: [PATCH] drm/tegra: Enable runtime PM during probe Date: Tue, 13 Jun 2023 12:52:14 +0300 Message-Id: <20230613095215.2497004-1-cyndis@kapsi.fi> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false 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: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jonathan Hunter , linux-tegra@vger.kernel.org, Mikko Perttunen Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Mikko Perttunen Currently, engine drivers only enable runtime PM during the host1x init callback. This can happen slightly later than the probe, which can cause the power domain to intermittently not be turned off after probe. My hypothesis is that there is a race condition between the post-probe power domain poweroff that is done from a queued work, and the pm_runtime_enable call happening in the host1x init callback. If the pm_runtime_enable call happens first, everything is OK and the power off work can disable the power domain as PM runtime is enabled and the device is runtime suspended. If power off work runs first, PM runtime is still disabled for the device and the domain must be kept powered. Resolve the issue by moving the runtime PM enablement to the probe function. Signed-off-by: Mikko Perttunen --- drivers/gpu/drm/tegra/gr2d.c | 16 +++++++--------- drivers/gpu/drm/tegra/gr3d.c | 16 +++++++--------- drivers/gpu/drm/tegra/nvdec.c | 17 +++++++---------- drivers/gpu/drm/tegra/vic.c | 17 +++++++---------- 4 files changed, 28 insertions(+), 38 deletions(-) diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c index 50f77fddda54..56468268df21 100644 --- a/drivers/gpu/drm/tegra/gr2d.c +++ b/drivers/gpu/drm/tegra/gr2d.c @@ -70,22 +70,15 @@ static int gr2d_init(struct host1x_client *client) goto free; } - pm_runtime_enable(client->dev); - pm_runtime_use_autosuspend(client->dev); - pm_runtime_set_autosuspend_delay(client->dev, 200); - err = tegra_drm_register_client(dev->dev_private, drm); if (err < 0) { dev_err(client->dev, "failed to register client: %d\n", err); - goto disable_rpm; + goto detach_iommu; } return 0; -disable_rpm: - pm_runtime_dont_use_autosuspend(client->dev); - pm_runtime_force_suspend(client->dev); - +detach_iommu: host1x_client_iommu_detach(client); free: host1x_syncpt_put(client->syncpts[0]); @@ -299,6 +292,7 @@ static void gr2d_remove(struct platform_device *pdev) { struct gr2d *gr2d = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); host1x_client_unregister(&gr2d->client.base); } @@ -372,6 +366,10 @@ static int __maybe_unused gr2d_runtime_resume(struct device *dev) goto disable_clk; } + pm_runtime_enable(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 500); + return 0; disable_clk: diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c index c026c2c916c1..46d213620b70 100644 --- a/drivers/gpu/drm/tegra/gr3d.c +++ b/drivers/gpu/drm/tegra/gr3d.c @@ -80,22 +80,15 @@ static int gr3d_init(struct host1x_client *client) goto free; } - pm_runtime_enable(client->dev); - pm_runtime_use_autosuspend(client->dev); - pm_runtime_set_autosuspend_delay(client->dev, 200); - err = tegra_drm_register_client(dev->dev_private, drm); if (err < 0) { dev_err(client->dev, "failed to register client: %d\n", err); - goto disable_rpm; + goto detach_iommu; } return 0; -disable_rpm: - pm_runtime_dont_use_autosuspend(client->dev); - pm_runtime_force_suspend(client->dev); - +detach_iommu: host1x_client_iommu_detach(client); free: host1x_syncpt_put(client->syncpts[0]); @@ -554,6 +547,7 @@ static void gr3d_remove(struct platform_device *pdev) { struct gr3d *gr3d = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); host1x_client_unregister(&gr3d->client.base); } @@ -607,6 +601,10 @@ static int __maybe_unused gr3d_runtime_resume(struct device *dev) goto disable_clk; } + pm_runtime_enable(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 500); + return 0; disable_clk: diff --git a/drivers/gpu/drm/tegra/nvdec.c b/drivers/gpu/drm/tegra/nvdec.c index ae78a81e5eef..2bc75f4d539f 100644 --- a/drivers/gpu/drm/tegra/nvdec.c +++ b/drivers/gpu/drm/tegra/nvdec.c @@ -177,13 +177,9 @@ static int nvdec_init(struct host1x_client *client) goto free_channel; } - pm_runtime_enable(client->dev); - pm_runtime_use_autosuspend(client->dev); - pm_runtime_set_autosuspend_delay(client->dev, 500); - err = tegra_drm_register_client(tegra, drm); if (err < 0) - goto disable_rpm; + goto free_syncpt; /* * Inherit the DMA parameters (such as maximum segment size) from the @@ -193,10 +189,7 @@ static int nvdec_init(struct host1x_client *client) return 0; -disable_rpm: - pm_runtime_dont_use_autosuspend(client->dev); - pm_runtime_force_suspend(client->dev); - +free_syncpt: host1x_syncpt_put(client->syncpts[0]); free_channel: host1x_channel_put(nvdec->channel); @@ -539,6 +532,10 @@ static int nvdec_probe(struct platform_device *pdev) goto exit_falcon; } + pm_runtime_enable(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 500); + return 0; exit_falcon: @@ -551,8 +548,8 @@ static void nvdec_remove(struct platform_device *pdev) { struct nvdec *nvdec = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); host1x_client_unregister(&nvdec->client.base); - falcon_exit(&nvdec->falcon); } diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c index da7a038dca20..19125406cf32 100644 --- a/drivers/gpu/drm/tegra/vic.c +++ b/drivers/gpu/drm/tegra/vic.c @@ -143,13 +143,9 @@ static int vic_init(struct host1x_client *client) goto free_channel; } - pm_runtime_enable(client->dev); - pm_runtime_use_autosuspend(client->dev); - pm_runtime_set_autosuspend_delay(client->dev, 500); - err = tegra_drm_register_client(tegra, drm); if (err < 0) - goto disable_rpm; + goto free_syncpt; /* * Inherit the DMA parameters (such as maximum segment size) from the @@ -159,10 +155,7 @@ static int vic_init(struct host1x_client *client) return 0; -disable_rpm: - pm_runtime_dont_use_autosuspend(client->dev); - pm_runtime_force_suspend(client->dev); - +free_syncpt: host1x_syncpt_put(client->syncpts[0]); free_channel: host1x_channel_put(vic->channel); @@ -529,6 +522,10 @@ static int vic_probe(struct platform_device *pdev) goto exit_falcon; } + pm_runtime_enable(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 500); + return 0; exit_falcon: @@ -541,8 +538,8 @@ static void vic_remove(struct platform_device *pdev) { struct vic *vic = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); host1x_client_unregister(&vic->client.base); - falcon_exit(&vic->falcon); }