From nobody Mon Feb 9 23:02:02 2026 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (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 B045D1B5812 for ; Wed, 14 Aug 2024 15:39:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723650001; cv=none; b=mOyo5T47L7EzQIK5RXUncAaSAoHR7uzUMPnl2Bt4OaqsNnOppi1zP919/kDCFrevDIdDnxE84Zmr5nObfv5dBgCR4pCv1ih11d/CLIinuuinYFag6PV4blLEFhDGZAnQkNPZpoYjuo1YYTxXcGGrLdFypbomzw1ax/k53uVtqIs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723650001; c=relaxed/simple; bh=KJIXodqaL/PlsDNGovQcl2iggmyHiixGfjVtxIDXn9g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=i1Gco/WbIpyWSVKPkSl5WStg7R4ms7EpK7WegCg7ucIZ/aWE++7Gf/gy8RakGVYvzMfZ9ktwevCQH2gak5AcpwQtFCWWNhNDvF5VVadeN59Xvw6v4NOAEuB4ElWzmyyFxdvFIdza/vVk2jCMCZ89uoCyW0GlNBYDB3iwJ2xVuwI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=BE9AjM89; arc=none smtp.client-ip=209.85.214.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="BE9AjM89" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-1fd70ba6a15so52935565ad.0 for ; Wed, 14 Aug 2024 08:39:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1723649998; x=1724254798; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=y2mHcNudHQ2J7KK+PvZEplwN1eJNrfpSWSE1XYB762U=; b=BE9AjM8905Xmsonh7g6XGECRszAmTdTh7+JYHCY6iGtmQ3KQuxmohIAwJMth2gSuIi RCQQOiTlPeuTW/DBmOiU2x561DfNxTmVbtZV9r/Q5XAGR2wpgl3bJnvxf+Ok5h6XIIzk xtFjh5aAVxGXF+MxdtD//SZQNiK2VcrqBYKgmqmQ8sWYG2uFo1/WxADbf3+scWGr6SCS XjdB4bNojTn5qZju0Z3ddwytqF2M6NP50uywMYNrUNZQO73fvxweagoJGEaLhiiFVR3W R+sxPKo5/aaImenjTl8iDgdHmgoVBZkU1wG35QTVNTmq0X+P9imynxVZ+PPanNOmYqFl LOpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723649998; x=1724254798; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=y2mHcNudHQ2J7KK+PvZEplwN1eJNrfpSWSE1XYB762U=; b=SkCa7hxhY4Py2lP6o0yA084UKKuKydrUbVgACqGSJuchuLeTGANqN0spSgGFjYQTJv vZdMS/vnPgZb9VA2m/zZlnpnxZ6an5b4LTmPLo1HZH1lvhU1kF/fiDPuyt5YO6YdI6mu dQ8oXNuc2VHM5CWHei8JTp029D85cYUmZKZSBXBsc8RBwtbk9KxPt90sicGYnMQLftxx rJl6fZhkC6sU5NFrqwOvPRfKpt1O0SrW4rOhN9jQuc/je3KGXqCDsKZU0cmCQtogR/AX DXoTRDiDN/BoAu8Kh5okIDETiuZe8ZtUS6lNS0uO/1ESLVnxMzLTfSx3KfQVVsMN1Pkl XwVQ== X-Forwarded-Encrypted: i=1; AJvYcCVzG51fCIW3dEXKCkUHbzvX0UVtdHQbbUfeI0AYEmk0n3dZ9WnVdbUIlvqLaILNboFLgDHQZDeWWiBkIf3xs1U51yTwFJDBhqZlbQ0d X-Gm-Message-State: AOJu0YxdDNBaP7Ms6be75R8oQE4c7hR859iVL5202/Luqr+t7R8WbD6A OMqj2FvyuDfsJelDoXPQxTRUu9j0M3OPkTzsuJ9f2BI/wNfP4SlcLxlnlLHqs4k= X-Google-Smtp-Source: AGHT+IFFuFlXHcCpgUXl2SWCuQLztcXNYrz5ohSNtrXnZ2RsGSm/ZnWNqQZ7tX0OfV01B0yJywvE6g== X-Received: by 2002:a17:902:dac3:b0:1fd:6c5b:afbc with SMTP id d9443c01a7336-201d64b075amr39750105ad.49.1723649997979; Wed, 14 Aug 2024 08:39:57 -0700 (PDT) Received: from localhost ([71.212.170.185]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-201cd1e2947sm30963465ad.306.2024.08.14.08.39.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Aug 2024 08:39:57 -0700 (PDT) From: Kevin Hilman Date: Wed, 14 Aug 2024 08:39:31 -0700 Subject: [PATCH v10 4/4] firmware: ti_sci: add CPU latency constraint management Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240814-lpm-constraints-firmware-msp-v10-4-bee4314bbdc8@baylibre.com> References: <20240814-lpm-constraints-firmware-msp-v10-0-bee4314bbdc8@baylibre.com> In-Reply-To: <20240814-lpm-constraints-firmware-msp-v10-0-bee4314bbdc8@baylibre.com> To: Nishanth Menon , Tero Kristo , Santosh Shilimkar Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Vibhore Vardhan , Dhruva Gole , Akashdeep Kaur , Markus Schneider-Pargmann X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2353; i=khilman@baylibre.com; h=from:subject:message-id; bh=KJIXodqaL/PlsDNGovQcl2iggmyHiixGfjVtxIDXn9g=; b=owEBbQKS/ZANAwAKAVk3GJrT+8ZlAcsmYgBmvM/Io/sKs8c84RWhexj+Zi6QBwTej+YUooUjb s97x27p1lOJAjMEAAEKAB0WIQR7h0YOFpJ/qfW/8QxZNxia0/vGZQUCZrzPyAAKCRBZNxia0/vG Zbj3D/9C07sip72O4Z5THjZtYagRVIR6SubwIE6eJYGg/7jzPwBA/CNELi2giSqGsSVsRNCRF9r HUKM+fzJapObF5XTNoJYRD8KcxNhAvQdXZcB+y+29jcnrw2GPH6Go3+Rb1MDXkI288gXSbUolpW hKWU1bN1B894RlxHQJa9jvrs5DT00kZzF4xjM67h7q4aI1LE/tnuXCLtlG7llK/KImGUp297WhG YE26VWO9fTwOsboD9t/fsjRHH7rpw0wYJXKYi16Ei0kKC0kGPumYtSl64nqYkKnVUzGn2opz0w8 7vJjKRGooIwZOdSRPY2EO2IgVqGssgm+8fDPOIdEBBTVgbfoukyrOBxXQGq8gdNqCt6YJ1jgaE7 eY+qyjImHQYAScEa0JqRFYJvMgTebgsfY6K/fVs7AZ5ptN+iHGPXFUsHj58LeGg7suQSu8IrBBg ad4f9PiW8r194/lvYEqYlzPfIR070N3+wR+2IVjVEs1D/DNVmhVUfT/9T4mQCnymGwxtkDSPdh6 tGQycTDPSs5rpyAs1Z7mZ71Li6g9YoQ2T1rasfUMxID2E1+zcUUBQ5ZJ9mtr3xP1TAGjxMiKkTV zgQ6+CMzN4iqW7naaYkBJeYsPl/eUjP76+jCqKWYUImnLSv2omR/KnZb31N1wnMEydl2HTenJ/+ 3wXwJlCd5vnMpeA== X-Developer-Key: i=khilman@baylibre.com; a=openpgp; fpr=7B87460E16927FA9F5BFF10C5937189AD3FBC665 During system-wide suspend, check if any of the CPUs have PM QoS resume latency constraints set. If so, set TI SCI constraint. TI SCI has a single system-wide latency constraint, so use the max of any of the CPU latencies as the system-wide value. Note: DM firmware clears all constraints at resume time, so constraints need to be checked/updated/sent at each system suspend. Co-developed-by: Vibhore Vardhan Signed-off-by: Vibhore Vardhan Reviewed-by: Dhruva Gole Signed-off-by: Dhruva Gole Signed-off-by: Markus Schneider-Pargmann Signed-off-by: Kevin Hilman --- drivers/firmware/ti_sci.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 107494406fa5..e0b11ca30af5 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -9,6 +9,7 @@ #define pr_fmt(fmt) "%s: " fmt, __func__ =20 #include +#include #include #include #include @@ -19,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -3645,7 +3647,27 @@ static int ti_sci_prepare_system_suspend(struct ti_s= ci_info *info) static int ti_sci_suspend(struct device *dev) { struct ti_sci_info *info =3D dev_get_drvdata(dev); - int ret; + struct device *cpu_dev, *cpu_dev_max =3D NULL; + s32 val, cpu_lat =3D 0; + int i, ret; + + if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) { + for_each_possible_cpu(i) { + cpu_dev =3D get_cpu_device(i); + val =3D dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_RESUME_LATENCY); + if (val !=3D PM_QOS_RESUME_LATENCY_NO_CONSTRAINT) { + cpu_lat =3D max(cpu_lat, val); + cpu_dev_max =3D cpu_dev; + } + } + if (cpu_dev_max) { + dev_dbg(cpu_dev_max, "%s: sending max CPU latency=3D%u\n", __func__, cp= u_lat); + ret =3D ti_sci_cmd_set_latency_constraint(&info->handle, + cpu_lat, TISCI_MSG_CONSTRAINT_SET); + if (ret) + return ret; + } + } =20 ret =3D ti_sci_prepare_system_suspend(info); if (ret) --=20 2.46.0