From patchwork Mon Jun 9 20:05:13 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 895481 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6745D224AE8; Mon, 9 Jun 2025 20:05:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749499542; cv=none; b=S31YV1FjM16Yo6dio1AjMRcyfFqZrFActyAGEQgOJwd80HQ8Rl/s71Xw5zscQwRJ+yA2kAFy308hfMhkbmRHfKPT6ge3dhMf48Bm7eWiY5z0nbjcZqjQhBzUW8bMS4Xbi0lMFd4H4BqrPSv1dxF4ajZha4OlhJT03g/83fdCmLU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749499542; c=relaxed/simple; bh=A0PimShuH3lA4xwk1tp0mt3DYevGbEQvlECDRve1+7U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DirOuAHLT+fdzi67NafByK6jbG7HlteK5AflJLHxDxva4ekFIGTuCYK5MTqEK1RZ4YtAt06BvQkiL2H+ptQnvI9/NEMhIXfJOMB2UI4mJMDUQD6aHbo2Wf37mEUOcgRycJ4SYo6k6UvppYjROrU1Tu6w4ytjeF9B5S07waOb8/g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pdQEyUPB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pdQEyUPB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 893F7C4CEF2; Mon, 9 Jun 2025 20:05:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749499542; bh=A0PimShuH3lA4xwk1tp0mt3DYevGbEQvlECDRve1+7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pdQEyUPBjA9sfxRU11xE0csgHTF7mv/6v6JroqFi8mFELLfhIKejyV5TBGcPVlPIX 59mj7JVhkj44qD9wdZLpZ5i0xK2VbORHxSuKSSESUTtQpF2GPToDqEJ9WVtAWDNNtq JS8gac4lCOP2d5XMJIUJ/mhILaX5gz4QuKrwiUwSoGnjfLbAMs5HHK9FH2LqdgerAu ru6jrPo+jxv7IczCCIfWiadmDDc79F/OIUvaPKKJuwOdYJMnespAWuh+VltEG1LuNB ++ZEiBues6HX9o595JxPJQ5VAlVzmBTA0xhHdrTM++DkQRo4/5Bl7Ymh0ZspVt77Kl oNY2u2wQXU4Fw== From: Mario Limonciello To: =?utf-8?q?Ilpo_J=C3=A4rvinen?= Cc: Mario Limonciello , Perry Yuan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H . Peter Anvin" , Jonathan Corbet , Huang Rui , "Gautham R . Shenoy" , "Rafael J . Wysocki" , Viresh Kumar , platform-driver-x86@vger.kernel.org (open list:AMD HETERO CORE HARDWARE FEEDBACK DRIVER), linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)), linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-pm@vger.kernel.org (open list:AMD PSTATE DRIVER), Perry Yuan Subject: [PATCH v11 08/13] platform/x86: hfi: add power management callback Date: Mon, 9 Jun 2025 15:05:13 -0500 Message-ID: <20250609200518.3616080-9-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250609200518.3616080-1-superm1@kernel.org> References: <20250609200518.3616080-1-superm1@kernel.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Perry Yuan Introduces power management callbacks for the `amd_hfi` driver. Specifically, the `suspend` and `resume` callbacks have been added to handle the necessary operations during system low power states and wake-up. Reviewed-by: Gautham R. Shenoy Signed-off-by: Perry Yuan Co-developed-by: Mario Limonciello Signed-off-by: Mario Limonciello --- drivers/platform/x86/amd/hfi/hfi.c | 33 ++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c index 681767d169c26..2c6832a3020ec 100644 --- a/drivers/platform/x86/amd/hfi/hfi.c +++ b/drivers/platform/x86/amd/hfi/hfi.c @@ -385,6 +385,38 @@ static int amd_hfi_metadata_parser(struct platform_device *pdev, return ret; } +static int amd_hfi_pm_resume(struct device *dev) +{ + int ret, cpu; + + for_each_online_cpu(cpu) { + ret = amd_hfi_set_state(cpu, true); + if (ret < 0) { + dev_err(dev, "failed to enable workload class config: %d\n", ret); + return ret; + } + } + + return 0; +} + +static int amd_hfi_pm_suspend(struct device *dev) +{ + int ret, cpu; + + for_each_online_cpu(cpu) { + ret = amd_hfi_set_state(cpu, false); + if (ret < 0) { + dev_err(dev, "failed to disable workload class config: %d\n", ret); + return ret; + } + } + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(amd_hfi_pm_ops, amd_hfi_pm_suspend, amd_hfi_pm_resume); + static const struct acpi_device_id amd_hfi_platform_match[] = { {"AMDI0104", 0}, { } @@ -434,6 +466,7 @@ static struct platform_driver amd_hfi_driver = { .driver = { .name = AMD_HFI_DRIVER, .owner = THIS_MODULE, + .pm = &amd_hfi_pm_ops, .acpi_match_table = ACPI_PTR(amd_hfi_platform_match), }, .probe = amd_hfi_probe,