From patchwork Tue Jun 18 15:50:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 13702544 X-Patchwork-Delegate: viresh.linux@gmail.com Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com [209.85.208.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ECF2E43AC3 for ; Tue, 18 Jun 2024 15:50:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718725833; cv=none; b=YoC0EXM+5tYcyxwa7aOnU8uYe0LXUTnLi8lSmKb2nc8m1utFVLG+Iyk2914kTDzZA9cTPsXv+kv/vIs5XJZFJFd7D0s2AW4MFV8cE7oUe7iQ2JHZtOuHvI0+MnAPikKbsFSCMLlET2/mwEAzzwj9obikpBniHkRb/SYsx8/iYME= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718725833; c=relaxed/simple; bh=O83FNAdgJkgnscldJT04vDrZcANIzWxDsUu1SHrFuVQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=A98ErXQ5Yf6CBkzEbH8WLDOEZdq5hUKPWIxllDpIQphJ3ssM9eivpYT8uEpTM/5PesrGltwzeZ8DRyqxSSgs/qmkrKGK34r7/evfQtwHQhoSZaNe9MMA0/G7FyP1iKaBhnaOqp8lAQFO46QGHi7pKth97Cj7nQo/4EOXPbBsfzs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=zmsr+E2K; arc=none smtp.client-ip=209.85.208.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="zmsr+E2K" Received: by mail-lj1-f179.google.com with SMTP id 38308e7fff4ca-2ec002caf3eso94055471fa.1 for ; Tue, 18 Jun 2024 08:50:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1718725828; x=1719330628; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=j0o2btwvxJuAvs23zoxm88cS8MnRzldpGlzftLOxRCk=; b=zmsr+E2KfIvSDLv1hwZZ1RJlEQJ0yo37Ra82b0MjeNoEGbFl9XyM45wMHlrhO0UuVG ZVPH+Kge0JYTpOUKMPAjoXXpwkzYK0Uratz4DCS8+DI6pc/wZ4N8oiGDEL/PqS48kDlW iMdelv+bm05dQV4RhFmHzh47kJSXHZe8e0Y5kNcZgAj0e8wfJHkS+1pQB4Wgmci5JTK/ K71/pHY9BDbAzCmHInWLxRhFQjYds2u2tib0/GjwwLr/EYAqV6XYA+Dz9i3vDjrTOauC u3Fm72G87Po1d9+r8hEJsveaoYD7DDPAHW0CGiYIAZXu9/7VHHLXane6n9LE2+HG8+eY hn7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718725828; x=1719330628; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=j0o2btwvxJuAvs23zoxm88cS8MnRzldpGlzftLOxRCk=; b=Hx+u6KuoWWBlPGPhwmOv1mZzsWcp3V9s/QzLZ+qHT4IC2cLmZh4Lvy3SUWYbskWlpw WPePtRRfAiiA0Caph6ICvtfPaUf7yqeYYacXIbX8toAQDgb0+e8jddOWBD+aZZ03rtGB ns+NgykcWSB1wyanP+yfWTccqYAsaSMffCvyqpPqUDbXIno3bDKE2QZkbcsDA9eErlTT FjbYia7//a0790xlsE3jJmsvA1z1nQ6BCZZ/y2moT732tKnM1C0eG3/peIDzLQjZrSZT XhsDKe+FJYy24zx++C4bMcVTpLuWav+T36yo4VCFlR2HMtH0eeKGUJNohCAuZ1pGw7yQ YOJw== X-Forwarded-Encrypted: i=1; AJvYcCVWkJM4cwmUlHfS7M747+CIk5rMnxKWB0XlFBrVXYStf9CW3rLyo0Rq53rRVErY16C82pux2cNEkW/n6UpcsuZNzOvcb9XhTkA= X-Gm-Message-State: AOJu0YzREBlrfi2XPp03HJFIaG0/NeHCkgGjGoX5ZlLmW3vPCmuOqZXj w6FXzqWrbLMNe/pcBhqZ8HU+posQ6EW5eoBDu3LwjvXSdubfN6rw/aNQyeqfTls= X-Google-Smtp-Source: AGHT+IHHHBPht25n9Gly0ArxuEAcjB2htzP4JMhnxdb/RauObkjrKLdR6j/+3D8xHpgeQ7/4CkMWXg== X-Received: by 2002:a19:750c:0:b0:52c:76ac:329b with SMTP id 2adb3069b0e04-52ccaa369d8mr30796e87.35.1718725828111; Tue, 18 Jun 2024 08:50:28 -0700 (PDT) Received: from uffe-tuxpro14.. (h-178-174-189-39.A498.priv.bahnhof.se. [178.174.189.39]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-52ca287241csm1544550e87.172.2024.06.18.08.50.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jun 2024 08:50:26 -0700 (PDT) From: Ulf Hansson To: Viresh Kumar , Nishanth Menon , Stephen Boyd Cc: Nikunj Kela , Prasad Sodagudi , Ulf Hansson , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH] OPP: Fix support for required OPPs for multiple PM domains Date: Tue, 18 Jun 2024 17:50:13 +0200 Message-Id: <20240618155013.323322-1-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In _set_opp() we are normally bailing out when trying to set an OPP that is the current one. This make perfect sense, but becomes a problem when _set_required_opps() calls it recursively. More precisely, when a required OPP is being shared by multiple PM domains, we end up skipping to request the corresponding performance-state for all of the PM domains, but the first one. Let's fix the problem, by calling _set_opp_level() from _set_required_opps() instead. Fixes: e37440e7e2c2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson --- drivers/opp/core.c | 47 +++++++++++++++++++++++----------------------- 1 file changed, 24 insertions(+), 23 deletions(-) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index cb4611fe1b5b..45eca65f27f9 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1061,6 +1061,28 @@ static int _set_opp_bw(const struct opp_table *opp_table, return 0; } +static int _set_opp_level(struct device *dev, struct opp_table *opp_table, + struct dev_pm_opp *opp) +{ + unsigned int level = 0; + int ret = 0; + + if (opp) { + if (opp->level == OPP_LEVEL_UNSET) + return 0; + + level = opp->level; + } + + /* Request a new performance state through the device's PM domain. */ + ret = dev_pm_domain_set_performance_state(dev, level); + if (ret) + dev_err(dev, "Failed to set performance state %u (%d)\n", level, + ret); + + return ret; +} + /* This is only called for PM domain for now */ static int _set_required_opps(struct device *dev, struct opp_table *opp_table, struct dev_pm_opp *opp, bool up) @@ -1091,7 +1113,8 @@ static int _set_required_opps(struct device *dev, struct opp_table *opp_table, if (devs[index]) { required_opp = opp ? opp->required_opps[index] : NULL; - ret = dev_pm_opp_set_opp(devs[index], required_opp); + ret = _set_opp_level(devs[index], opp_table, + required_opp); if (ret) return ret; } @@ -1102,28 +1125,6 @@ static int _set_required_opps(struct device *dev, struct opp_table *opp_table, return 0; } -static int _set_opp_level(struct device *dev, struct opp_table *opp_table, - struct dev_pm_opp *opp) -{ - unsigned int level = 0; - int ret = 0; - - if (opp) { - if (opp->level == OPP_LEVEL_UNSET) - return 0; - - level = opp->level; - } - - /* Request a new performance state through the device's PM domain. */ - ret = dev_pm_domain_set_performance_state(dev, level); - if (ret) - dev_err(dev, "Failed to set performance state %u (%d)\n", level, - ret); - - return ret; -} - static void _find_current_opp(struct device *dev, struct opp_table *opp_table) { struct dev_pm_opp *opp = ERR_PTR(-ENODEV);