Messages in this thread Patch in this message | | | From | Perry Yuan <> | Subject | [PATCH v7 4/6] cppc_acpi: print error message if CPPC is unsupported | Date | Wed, 13 Mar 2024 17:59:16 +0800 |
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to be more clear what is wrong with CPPC when pstate driver failed to load which has dependency on the CPPC capabilities.
Add one more debug message to notify user if CPPC is not supported by the CPU, then it will be easy to find out what need to fix for pstate driver loading issue.
[ 0.477523] amd_pstate: the _CPC object is not present in SBIOS or ACPI disabled
Above message is not clear enough to verify whether CPPC is not supported.
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Perry Yuan <perry.yuan@amd.com> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> --- drivers/acpi/cppc_acpi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 4bfbe55553f4..3134101f31b6 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -686,8 +686,10 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) if (!osc_sb_cppc2_support_acked) { pr_debug("CPPC v2 _OSC not acked\n"); - if (!cpc_supported_by_cpu()) + if (!cpc_supported_by_cpu()) { + pr_debug("CPPC is not supported by the CPU\n"); return -ENODEV; + } } /* Parse the ACPI _CPC table for this CPU. */ -- 2.34.1
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