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linux/debian/patches/patchset-pf/amd-pstate/0001-cpufreq-amd-pstate-add-quirk-for-Ryzen-3000-series-p.patch

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2024-12-10 06:44:25 +03:00
From f077f4265c59f5d417aa40eaf82bb632c891b221 Mon Sep 17 00:00:00 2001
From: Perry Yuan <perry.yuan@amd.com>
Date: Fri, 9 Aug 2024 14:09:05 +0800
Subject: 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@163.com>
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
---
drivers/cpufreq/amd-pstate.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
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@@ -136,6 +136,11 @@ 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)
{
/**
2024-12-10 06:44:25 +03:00
@@ -152,6 +157,21 @@ static int __init dmi_matched_7k62_bios_
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,
2024-12-10 06:44:25 +03:00
@@ -162,6 +182,16 @@ static const struct dmi_system_id amd_ps
},
.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);