platform/x86/amd/pmf: Add helper to verify BIOS input notifications are enable/disable

JIRA: https://issues.redhat.com/browse/RHEL-73301

commit 4389d38
Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Date:   Mon Sep 1 16:31:36 2025 +0530

    platform/x86/amd/pmf: Add helper to verify BIOS input notifications are enable/disable

    Implement a helper function to check if BIOS input notifications are
    enabled or disabled.

    Co-developed-by: Patil Rajesh Reddy <Patil.Reddy@amd.com>
    Signed-off-by: Patil Rajesh Reddy <Patil.Reddy@amd.com>
    Tested-by: Yijun Shen <Yijun.Shen@Dell.com>
    Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
    Link: https://patch.msgid.link/20250901110140.2519072-6-Shyam-sundar.S-k@amd.com
    Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

drivers/platform/x86/amd/pmf/acpi.c

@@ -161,6 +161,11 @@ int is_apmf_func_supported(struct amd_pmf_dev *pdev, unsigned long index)
 	return !!(pdev->supported_func & BIT(index - 1));
 }
 
+int is_apmf_bios_input_notifications_supported(struct amd_pmf_dev *pdev)
+{
+	return !!(pdev->notifications & CUSTOM_BIOS_INPUT_BITS);
+}
+
 int apts_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,
 				       struct amd_pmf_apts_granular_output *data, u32 apts_idx)
 {
@@ -385,6 +390,7 @@ static int apmf_if_verify_interface(struct amd_pmf_dev *pdev)
 
 	pdev->pmf_if_version = output.version;
 
+	pdev->notifications =  output.notification_mask;
 	return 0;
 }
 

drivers/platform/x86/amd/pmf/pmf.h

@@ -118,6 +118,7 @@ struct cookie_header {
 #define PMF_IF_V2		2
 
 #define APTS_MAX_STATES		16
+#define CUSTOM_BIOS_INPUT_BITS	GENMASK(16, 7)
 
 /* APTS PMF BIOS Interface */
 struct amd_pmf_apts_output {
@@ -377,6 +378,7 @@ struct amd_pmf_dev {
 	struct resource *res;
 	struct apmf_sbios_req_v2 req; /* To get custom bios pending request */
 	struct mutex cb_mutex;
+	u32 notifications;
 };
 
 struct apmf_sps_prop_granular_v2 {
@@ -641,6 +643,19 @@ static const struct amd_pmf_pb_bitmap custom_bios_inputs[] __used = {
 	{"NOTIFY_CUSTOM_BIOS_INPUT10",    BIT(14)},
 };
 
+static const struct amd_pmf_pb_bitmap custom_bios_inputs_v1[] __used = {
+	{"NOTIFY_CUSTOM_BIOS_INPUT1",     BIT(7)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT2",     BIT(8)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT3",     BIT(9)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT4",     BIT(10)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT5",     BIT(11)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT6",     BIT(12)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT7",     BIT(13)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT8",     BIT(14)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT9",     BIT(15)},
+	{"NOTIFY_CUSTOM_BIOS_INPUT10",    BIT(16)},
+};
+
 enum platform_type {
 	PTYPE_UNKNOWN = 0,
 	LID_CLOSE,
@@ -792,6 +807,7 @@ int apmf_os_power_slider_update(struct amd_pmf_dev *dev, u8 flag);
 int amd_pmf_set_dram_addr(struct amd_pmf_dev *dev, bool alloc_buffer);
 int amd_pmf_notify_sbios_heartbeat_event_v2(struct amd_pmf_dev *dev, u8 flag);
 u32 fixp_q88_fromint(u32 val);
+int is_apmf_bios_input_notifications_supported(struct amd_pmf_dev *pdev);
 
 /* SPS Layer */
 int amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf);