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Message-ID: <20240809060905.777146-1-perry.yuan@amd.com>
Date: Fri, 9 Aug 2024 14:09:05 +0800
From: Perry Yuan <perry.yuan@....com>
To: <rafael.j.wysocki@...el.com>, <Mario.Limonciello@....com>,
<viresh.kumar@...aro.org>, <Ray.Huang@....com>, <gautham.shenoy@....com>,
<Borislav.Petkov@....com>, <00107082@....com>
CC: <Xinmei.Huang@....com>, <Xiaojian.Du@....com>, <Li.Meng@....com>,
<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH RESENT] cpufreq: amd-pstate: add quirk for Ryzen 3000 series processor
The Ryzen 3000 series processors have been observed lacking the
nominal_freq and lowest_freq parameters in their ACPI tables. This
absence causes issues with loading the amd-pstate driver on these
systems. Introduces a fix to resolve the dependency issue
by adding a quirk specifically for the Ryzen 3000 series.
Reported-by: David Wang <00107082@....com>
Signed-off-by: Perry Yuan <perry.yuan@....com>
---
drivers/cpufreq/amd-pstate.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 68c616b572f2..b39365b980b9 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -142,6 +142,11 @@ static struct quirk_entry quirk_amd_7k62 = {
.lowest_freq = 550,
};
+static struct quirk_entry quirk_amd_mts = {
+ .nominal_freq = 3600,
+ .lowest_freq = 550,
+};
+
static int __init dmi_matched_7k62_bios_bug(const struct dmi_system_id *dmi)
{
/**
@@ -158,6 +163,21 @@ static int __init dmi_matched_7k62_bios_bug(const struct dmi_system_id *dmi)
return 0;
}
+static int __init dmi_matched_mts_bios_bug(const struct dmi_system_id *dmi)
+{
+ /**
+ * match the broken bios for ryzen 3000 series processor support CPPC V2
+ * broken BIOS lack of nominal_freq and lowest_freq capabilities
+ * definition in ACPI tables
+ */
+ if (cpu_feature_enabled(X86_FEATURE_ZEN2)) {
+ quirks = dmi->driver_data;
+ pr_info("Overriding nominal and lowest frequencies for %s\n", dmi->ident);
+ return 1;
+ }
+
+ return 0;
+}
static const struct dmi_system_id amd_pstate_quirks_table[] __initconst = {
{
.callback = dmi_matched_7k62_bios_bug,
@@ -168,6 +188,16 @@ static const struct dmi_system_id amd_pstate_quirks_table[] __initconst = {
},
.driver_data = &quirk_amd_7k62,
},
+ {
+ .callback = dmi_matched_mts_bios_bug,
+ .ident = "AMD Ryzen 3000",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "B450M MORTAR MAX (MS-7B89)"),
+ DMI_MATCH(DMI_BIOS_RELEASE, "06/10/2020"),
+ DMI_MATCH(DMI_BIOS_VERSION, "5.14"),
+ },
+ .driver_data = &quirk_amd_mts,
+ },
{}
};
MODULE_DEVICE_TABLE(dmi, amd_pstate_quirks_table);
--
2.34.1
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