platform/x86/amd/pmf: Add support for notifying Smart PC Solution updates

The APMF function 14 (Notify Smart PC Solution Updates) allows the BIOS
(AMD/OEM) to be informed about the outputs of custom Smart PC policies.
Enhance the PMF driver to invoke APMF function 14 when these custom policy
outputs are triggered.
Co-developed-by: Patil Rajesh Reddy <Patil.Reddy@amd.com>
Signed-off-by: Patil Rajesh Reddy <Patil.Reddy@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20240812131839.308768-1-Shyam-sundar.S-k@amd.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

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

@@ -282,6 +282,29 @@ int apmf_update_fan_idx(struct amd_pmf_dev *pdev, bool manual, u32 idx)
 	return 0;
 }
 
+static int apmf_notify_smart_pc_update(struct amd_pmf_dev *pdev, u32 val, u32 preq, u32 index)
+{
+	struct amd_pmf_notify_smart_pc_update args;
+	struct acpi_buffer params;
+	union acpi_object *info;
+
+	args.size = sizeof(args);
+	args.pending_req = preq;
+	args.custom_bios[index] = val;
+
+	params.length = sizeof(args);
+	params.pointer = &args;
+
+	info = apmf_if_call(pdev, APMF_FUNC_NOTIFY_SMART_PC_UPDATES, &params);
+	if (!info)
+		return -EIO;
+
+	kfree(info);
+	dev_dbg(pdev->dev, "Notify smart pc update, val: %u\n", val);
+
+	return 0;
+}
+
 int apmf_get_auto_mode_def(struct amd_pmf_dev *pdev, struct apmf_auto_mode *data)
 {
 	return apmf_if_call_store_buffer(pdev, APMF_FUNC_AUTO_MODE, data, sizeof(*data));
@@ -447,6 +470,14 @@ int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev)
 	return 0;
 }
 
+int amd_pmf_smartpc_apply_bios_output(struct amd_pmf_dev *dev, u32 val, u32 preq, u32 idx)
+{
+	if (!is_apmf_func_supported(dev, APMF_FUNC_NOTIFY_SMART_PC_UPDATES))
+		return -EINVAL;
+
+	return apmf_notify_smart_pc_update(dev, val, preq, idx);
+}
+
 void apmf_acpi_deinit(struct amd_pmf_dev *pmf_dev)
 {
 	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);

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

@@ -35,6 +35,7 @@ struct cookie_header {
 #define APMF_FUNC_STATIC_SLIDER_GRANULAR       9
 #define APMF_FUNC_DYN_SLIDER_AC				11
 #define APMF_FUNC_DYN_SLIDER_DC				12
+#define APMF_FUNC_NOTIFY_SMART_PC_UPDATES		14
 #define APMF_FUNC_SBIOS_HEARTBEAT_V2			16
 
 /* Message Definitions */
@@ -82,7 +83,17 @@ struct cookie_header {
 #define PMF_POLICY_STT_SKINTEMP_APU				7
 #define PMF_POLICY_STT_SKINTEMP_HS2				8
 #define PMF_POLICY_SYSTEM_STATE					9
+#define PMF_POLICY_BIOS_OUTPUT_1				10
+#define PMF_POLICY_BIOS_OUTPUT_2				11
 #define PMF_POLICY_P3T						38
+#define PMF_POLICY_BIOS_OUTPUT_3				57
+#define PMF_POLICY_BIOS_OUTPUT_4				58
+#define PMF_POLICY_BIOS_OUTPUT_5				59
+#define PMF_POLICY_BIOS_OUTPUT_6				60
+#define PMF_POLICY_BIOS_OUTPUT_7				61
+#define PMF_POLICY_BIOS_OUTPUT_8				62
+#define PMF_POLICY_BIOS_OUTPUT_9				63
+#define PMF_POLICY_BIOS_OUTPUT_10				64
 
 /* TA macros */
 #define PMF_TA_IF_VERSION_MAJOR				1
@@ -344,6 +355,12 @@ struct os_power_slider {
 	u8 slider_event;
 } __packed;
 
+struct amd_pmf_notify_smart_pc_update {
+	u16 size;
+	u32 pending_req;
+	u32 custom_bios[10];
+} __packed;
+
 struct fan_table_control {
 	bool manual;
 	unsigned long fan_id;
@@ -717,6 +734,7 @@ extern const struct attribute_group cnqf_feature_attribute_group;
 int amd_pmf_init_smart_pc(struct amd_pmf_dev *dev);
 void amd_pmf_deinit_smart_pc(struct amd_pmf_dev *dev);
 int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev);
+int amd_pmf_smartpc_apply_bios_output(struct amd_pmf_dev *dev, u32 val, u32 preq, u32 idx);
 
 /* Smart PC - TA interfaces */
 void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in);

drivers/platform/x86/amd/pmf/tee-if.c

@@ -160,6 +160,46 @@ static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_
 			dev_dbg(dev->dev, "update SYSTEM_STATE: %s\n",
 				amd_pmf_uevent_as_str(val));
 			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_1:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(0), 0);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_2:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(1), 1);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_3:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(2), 2);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_4:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(3), 3);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_5:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(4), 4);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_6:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(5), 5);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_7:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(6), 6);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_8:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(7), 7);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_9:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(8), 8);
+			break;
+
+		case PMF_POLICY_BIOS_OUTPUT_10:
+			amd_pmf_smartpc_apply_bios_output(dev, val, BIT(9), 9);
+			break;
 		}
 	}
 }