From a33e9e106601b5271561e7d79a3d3c4e7e84f07f Mon Sep 17 00:00:00 2001 From: Shyam Sundar S K Date: Wed, 6 Mar 2024 17:14:09 +0530 Subject: platform/x86/amd/pmf: Differentiate PMF ACPI versions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For family 1AH, certain PMF features have been enhanced - leading to a newer APMF (AMD PMF) spec (BIOS and PMF driver interface) called v2. This information would be fed into the if_version field of the verify_interface method of the APMF call from the BIOS. Use this information to store the version number to differentiate between v1 or v2 and also store the information into the PMF private data structure, as this information would be required for further code branching to support the latest silicon. Reviewed-by: Kuppuswamy Sathyanarayanan Co-developed-by: Patil Rajesh Reddy Signed-off-by: Patil Rajesh Reddy Signed-off-by: Shyam Sundar S K Link: https://lore.kernel.org/r/20240306114415.3267603-2-Shyam-sundar.S-k@amd.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- drivers/platform/x86/amd/pmf/acpi.c | 6 ++++-- drivers/platform/x86/amd/pmf/pmf.h | 1 + 2 files changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/platform/x86') diff --git a/drivers/platform/x86/amd/pmf/acpi.c b/drivers/platform/x86/amd/pmf/acpi.c index f2eb07ef855a..1f287a147c57 100644 --- a/drivers/platform/x86/amd/pmf/acpi.c +++ b/drivers/platform/x86/amd/pmf/acpi.c @@ -218,8 +218,10 @@ static int apmf_if_verify_interface(struct amd_pmf_dev *pdev) return err; pdev->supported_func = output.supported_functions; - dev_dbg(pdev->dev, "supported functions:0x%x notifications:0x%x\n", - output.supported_functions, output.notification_mask); + dev_dbg(pdev->dev, "supported functions:0x%x notifications:0x%x version:%u\n", + output.supported_functions, output.notification_mask, output.version); + + pdev->pmf_if_version = output.version; return 0; } diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h index 0c90805dc85b..2f23ced7da66 100644 --- a/drivers/platform/x86/amd/pmf/pmf.h +++ b/drivers/platform/x86/amd/pmf/pmf.h @@ -235,6 +235,7 @@ struct amd_pmf_dev { u64 policy_addr; void __iomem *policy_base; bool smart_pc_enabled; + u16 pmf_if_version; }; struct apmf_sps_prop_granular { -- cgit v1.2.3