linux-kernel - [PATCH 1/1] platform/x86/amd/pmf: Introduce option to disable Smart PC function in PMF

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Message-ID: <20260117200819.12383-2-xglooom@gmail.com>
Date: Sun, 18 Jan 2026 01:08:11 +0500
From: Alexey Zagorodnikov <xglooom@...il.com>
To: platform-driver-x86@...r.kernel.org
Cc: Alexey Zagorodnikov <xglooom@...il.com>,
	Shyam Sundar S K <Shyam-sundar.S-k@....com>,
	Hans de Goede <hansg@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] platform/x86/amd/pmf: Introduce option to disable Smart PC function in PMF

Signed-off-by: Alexey Zagorodnikov <xglooom@...il.com>
---
 drivers/platform/x86/amd/pmf/core.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index 8fc293c9c5380..00a4fc899c727 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -53,6 +53,11 @@ static bool force_load;
 module_param(force_load, bool, 0444);
 MODULE_PARM_DESC(force_load, "Force load this driver on supported older platforms (experimental)");
 
+/* Force to disable Smart PC Solution */
+static bool disable_smart_pc;
+module_param(disable_smart_pc, bool, 0444);
+MODULE_PARM_DESC(disable_smart_pc, "Disable Smart PC Solution");
+
 static int amd_pmf_pwr_src_notify_call(struct notifier_block *nb, unsigned long event, void *data)
 {
 	struct amd_pmf_dev *pmf = container_of(nb, struct amd_pmf_dev, pwr_src_notifier);
@@ -362,11 +367,15 @@ static void amd_pmf_init_features(struct amd_pmf_dev *dev)
 		dev_dbg(dev->dev, "SPS enabled and Platform Profiles registered\n");
 	}
 
-	amd_pmf_init_smart_pc(dev);
-	if (dev->smart_pc_enabled) {
-		dev_dbg(dev->dev, "Smart PC Solution Enabled\n");
-		/* If Smart PC is enabled, no need to check for other features */
-		return;
+	if (disable_smart_pc) {
+		dev->smart_pc_enabled = false;
+	} else {
+		amd_pmf_init_smart_pc(dev);
+		if (dev->smart_pc_enabled) {
+			dev_dbg(dev->dev, "Smart PC Solution Enabled\n");
+			/* If Smart PC is enabled, no need to check for other features */
+			return;
+		}
 	}
 
 	if (is_apmf_func_supported(dev, APMF_FUNC_AUTO_MODE)) {
-- 
2.52.0