path: root/SOURCES/asus-linux.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jan200101 <sentrycraft123@gmail.com>
Date: Wed, 8 Mar 2023 08:26:17 +0100
Subject: [PATCH] asus-linux This patch adds support for the tablet mode switch
 sensors on convertible devices where that sensor is managed by AMD SFH, like
 the Asus Flow X13 and the Lenovo ThinkPad L13 Yoga Gen2 (AMD).

Co-developed-by: Ivan Dovgal <iv.dovg@gmail.com>
Signed-off-by: Ivan Dovgal <iv.dovg@gmail.com>
Co-developed-by: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Adrian Freund <adrian@freund.io>
---
v2:
* Fixed build warning reported by kernel test robot <lkp@intel.com>
Signed-off-by: Jan200101 <sentrycraft123@gmail.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_client.c      |  2 +
 drivers/hid/amd-sfh-hid/amd_sfh_hid.h         |  2 +-
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c        |  4 +
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.h        |  1 +
 .../hid_descriptor/amd_sfh_hid_desc.c         | 27 ++++++
 .../hid_descriptor/amd_sfh_hid_desc.h         |  7 ++
 .../hid_descriptor/amd_sfh_hid_report_desc.h  | 21 ++++
 drivers/pci/controller/vmd.c                  | 96 ++++++++++++++-----
 drivers/pci/pcie/aspm.c                       | 54 +++++++++++
 include/linux/pci.h                           |  7 ++
 10 files changed, 194 insertions(+), 27 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index c751d12f5..690be680e 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -146,6 +146,8 @@ static const char *get_sensor_name(int idx)
 		return "gyroscope";
 	case mag_idx:
 		return "magnetometer";
+	case tms_idx:
+		return "tablet-mode-switch";
 	case als_idx:
 		return "ALS";
 	case HPD_IDX:
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
index 528036892..97296f587 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
@@ -11,7 +11,7 @@
 #ifndef AMDSFH_HID_H
 #define AMDSFH_HID_H
 
-#define MAX_HID_DEVICES		5
+#define MAX_HID_DEVICES		6
 #define AMD_SFH_HID_VENDOR	0x1022
 #define AMD_SFH_HID_PRODUCT	0x0001
 
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index 47774b9ab..cfda797f0 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -27,6 +27,7 @@
 #define ACEL_EN		BIT(0)
 #define GYRO_EN		BIT(1)
 #define MAGNO_EN	BIT(2)
+#define TMS_EN		BIT(15)
 #define HPD_EN		BIT(16)
 #define ALS_EN		BIT(19)
 
@@ -227,6 +228,9 @@ int amd_mp2_get_sensor_num(struct amd_mp2_dev *privdata, u8 *sensor_id)
 	if (MAGNO_EN & activestatus)
 		sensor_id[num_of_sensors++] = mag_idx;
 
+	if (TMS_EN & activestatus)
+		sensor_id[num_of_sensors++] = tms_idx;
+
 	if (ALS_EN & activestatus)
 		sensor_id[num_of_sensors++] = als_idx;
 
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
index dfb7cabd8..e18ceee9e 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
@@ -78,6 +78,7 @@ enum sensor_idx {
 	accel_idx = 0,
 	gyro_idx = 1,
 	mag_idx = 2,
+	tms_idx = 15,
 	als_idx = 19
 };
 
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
index f9a8c02d5..181973f35 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
@@ -47,6 +47,11 @@ static int get_report_descriptor(int sensor_idx, u8 *rep_desc)
 		memcpy(rep_desc, comp3_report_descriptor,
 		       sizeof(comp3_report_descriptor));
 		break;
+	case tms_idx: /* tablet mode switch */
+		memset(rep_desc, 0, sizeof(tms_report_descriptor));
+		memcpy(rep_desc, tms_report_descriptor,
+		       sizeof(tms_report_descriptor));
+		break;
 	case als_idx: /* ambient light sensor */
 		memset(rep_desc, 0, sizeof(als_report_descriptor));
 		memcpy(rep_desc, als_report_descriptor,
@@ -96,6 +101,16 @@ static u32 get_descr_sz(int sensor_idx, int descriptor_name)
 			return sizeof(struct magno_feature_report);
 		}
 		break;
+	case tms_idx:
+		switch (descriptor_name) {
+		case descr_size:
+			return sizeof(tms_report_descriptor);
+		case input_size:
+			return sizeof(struct tms_input_report);
+		case feature_size:
+			return sizeof(struct tms_feature_report);
+		}
+		break;
 	case als_idx:
 		switch (descriptor_name) {
 		case descr_size:
@@ -138,6 +153,7 @@ static u8 get_feature_report(int sensor_idx, int report_id, u8 *feature_report)
 	struct accel3_feature_report acc_feature;
 	struct gyro_feature_report gyro_feature;
 	struct magno_feature_report magno_feature;
+	struct tms_feature_report tms_feature;
 	struct hpd_feature_report hpd_feature;
 	struct als_feature_report als_feature;
 	u8 report_size = 0;
@@ -173,6 +189,11 @@ static u8 get_feature_report(int sensor_idx, int report_id, u8 *feature_report)
 		memcpy(feature_report, &magno_feature, sizeof(magno_feature));
 		report_size = sizeof(magno_feature);
 		break;
+	case tms_idx:  /* tablet mode switch */
+		get_common_features(&tms_feature.common_property, report_id);
+		memcpy(feature_report, &tms_feature, sizeof(tms_feature));
+		report_size = sizeof(tms_feature);
+		break;
 	case als_idx:  /* ambient light sensor */
 		get_common_features(&als_feature.common_property, report_id);
 		als_feature.als_change_sesnitivity = HID_DEFAULT_SENSITIVITY;
@@ -211,6 +232,7 @@ static u8 get_input_report(u8 current_index, int sensor_idx, int report_id,
 	struct accel3_input_report acc_input;
 	struct gyro_input_report gyro_input;
 	struct hpd_input_report hpd_input;
+	struct tms_input_report tms_input;
 	struct als_input_report als_input;
 	struct hpd_status hpdstatus;
 	u8 report_size = 0;
@@ -244,6 +266,11 @@ static u8 get_input_report(u8 current_index, int sensor_idx, int report_id,
 		memcpy(input_report, &magno_input, sizeof(magno_input));
 		report_size = sizeof(magno_input);
 		break;
+	case tms_idx: /* tablet mode switch */
+		get_common_inputs(&tms_input.common_property, report_id);
+		report_size = sizeof(tms_input);
+		memcpy(input_report, &tms_input, sizeof(tms_input));
+		break;
 	case als_idx: /* Als */
 		get_common_inputs(&als_input.common_property, report_id);
 		/* For ALS ,V2 Platforms uses C2P_MSG5 register instead of DRAM access method */
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
index ebd55675e..b22068a47 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
@@ -111,4 +111,11 @@ struct hpd_input_report {
 	u8 human_presence;
 } __packed;
 
+struct tms_feature_report {
+	struct common_feature_property common_property;
+} __packed;
+
+struct tms_input_report {
+	struct common_input_property common_property;
+} __packed;
 #endif
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
index 697f2791e..96cbc1e5b 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
@@ -644,6 +644,27 @@ static const u8 als_report_descriptor[] = {
 0xC0			/* HID end collection */
 };
 
+
+/* TABLET MODE SWITCH */
+__maybe_unused // Used by sfh1.0, but not yet implemented in sfh1.1
+static const u8 tms_report_descriptor[] = {
+0x06, 0x43, 0xFF,  // Usage Page (Vendor Defined 0xFF43)
+0x0A, 0x02, 0x02,  // Usage (0x0202)
+0xA1, 0x01, // Collection (Application)
+0x85, 0x11, //   Report ID (17)
+0x15, 0x00, //   Logical Minimum (0)
+0x25, 0x01, //   Logical Maximum (1)
+0x35, 0x00, //   Physical Minimum (0)
+0x45, 0x01, //   Physical Maximum (1)
+0x65, 0x00, //   Unit (None)
+0x55, 0x00, //   Unit Exponent (0)
+0x75, 0x01, //   Report Size (1)
+0x95, 0x98, //   Report Count (-104)
+0x81, 0x03, //   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+0x91, 0x03, //   Output (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
+0xC1, 0x00, // End Collection
+};
+
 /* BIOMETRIC PRESENCE*/
 static const u8 hpd_report_descriptor[] = {
 0x05, 0x20,          /* Usage page */
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 769eedeb8..900bf82dc 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -66,8 +66,22 @@ enum vmd_features {
 	 * interrupt handling.
 	 */
 	VMD_FEAT_CAN_BYPASS_MSI_REMAP		= (1 << 4),
+
+	/*
+	 * Enable ASPM on the PCIE root ports and set the default LTR of the
+	 * storage devices on platforms where these values are not configured by
+	 * BIOS. This is needed for laptops, which require these settings for
+	 * proper power management of the SoC.
+	 */
+	VMD_FEAT_BIOS_PM_QUIRK		= (1 << 5),
 };
 
+#define VMD_FEATS_CLIENT	(VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |	\
+				 VMD_FEAT_HAS_BUS_RESTRICTIONS |	\
+				 VMD_FEAT_OFFSET_FIRST_VECTOR)
+
+#define VMD_BIOS_PM_QUIRK_LTR	0x1003	/* 3145728 ns */
+
 static DEFINE_IDA(vmd_instance_ida);
 
 /*
@@ -709,6 +723,46 @@ static void vmd_copy_host_bridge_flags(struct pci_host_bridge *root_bridge,
 	vmd_bridge->native_dpc = root_bridge->native_dpc;
 }
 
+/*
+ * Enable ASPM and LTR settings on devices that aren't configured by BIOS.
+ */
+static int vmd_pm_enable_quirk(struct pci_dev *pdev, void *userdata)
+{
+	unsigned long features = *(unsigned long *)userdata;
+	u16 ltr = VMD_BIOS_PM_QUIRK_LTR;
+	u32 ltr_reg;
+	int pos;
+
+	if (!(features & VMD_FEAT_BIOS_PM_QUIRK))
+		return 0;
+
+	pci_enable_link_state(pdev, PCIE_LINK_STATE_ALL);
+
+	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_LTR);
+	if (!pos)
+		return 0;
+
+	/*
+	 * Skip if the max snoop LTR is non-zero, indicating BIOS has set it
+	 * so the LTR quirk is not needed.
+	 */
+	pci_read_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, &ltr_reg);
+	if (!!(ltr_reg & (PCI_LTR_VALUE_MASK | PCI_LTR_SCALE_MASK)))
+		return 0;
+
+	/*
+	 * Set the default values to the maximum required by the platform to
+	 * allow the deepest power management savings. Write as a DWORD where
+	 * the lower word is the max snoop latency and the upper word is the
+	 * max non-snoop latency.
+	 */
+	ltr_reg = (ltr << 16) | ltr;
+	pci_write_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, ltr_reg);
+	pci_info(pdev, "VMD: Default LTR value set by driver\n");
+
+	return 0;
+}
+
 static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
 {
 	struct pci_sysdata *sd = &vmd->sysdata;
@@ -881,6 +935,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
 
 	pci_assign_unassigned_bus_resources(vmd->bus);
 
+	pci_walk_bus(vmd->bus, vmd_pm_enable_quirk, &features);
+
 	/*
 	 * VMD root buses are virtual and don't return true on pci_is_pcie()
 	 * and will fail pcie_bus_configure_settings() early. It can instead be
@@ -1017,36 +1073,24 @@ static int vmd_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(vmd_dev_pm_ops, vmd_suspend, vmd_resume);
 
 static const struct pci_device_id vmd_ids[] = {
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),
+	{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),
 		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
+	{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
 		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW |
 				VMD_FEAT_HAS_BUS_RESTRICTIONS |
 				VMD_FEAT_CAN_BYPASS_MSI_REMAP,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x467f),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4c3d),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa77f),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7d0b),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xad0b),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
-	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B),
-		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-				VMD_FEAT_OFFSET_FIRST_VECTOR,},
+	{PCI_VDEVICE(INTEL, 0x467f),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
+	{PCI_VDEVICE(INTEL, 0x4c3d),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
+	{PCI_VDEVICE(INTEL, 0xa77f),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
+	{PCI_VDEVICE(INTEL, 0x7d0b),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
+	{PCI_VDEVICE(INTEL, 0xad0b),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
+	{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B),
+		.driver_data = VMD_FEATS_CLIENT | VMD_FEAT_BIOS_PM_QUIRK,},
 	{0,}
 };
 MODULE_DEVICE_TABLE(pci, vmd_ids);
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 4b4184563..66d7514ca 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1138,6 +1138,60 @@ int pci_disable_link_state(struct pci_dev *pdev, int state)
 }
 EXPORT_SYMBOL(pci_disable_link_state);
 
+/**
+ * pci_enable_link_state - Clear and set the default device link state so that
+ * the link may be allowed to enter the specified states. Note that if the
+ * BIOS didn't grant ASPM control to the OS, this does nothing because we can't
+ * touch the LNKCTL register. Also note that this does not enable states
+ * disabled by pci_disable_link_state(). Return 0 or a negative errno.
+ *
+ * @pdev: PCI device
+ * @state: Mask of ASPM link states to enable
+ */
+int pci_enable_link_state(struct pci_dev *pdev, int state)
+{
+	struct pcie_link_state *link = pcie_aspm_get_link(pdev);
+
+	if (!link)
+		return -EINVAL;
+	/*
+	 * A driver requested that ASPM be enabled on this device, but
+	 * if we don't have permission to manage ASPM (e.g., on ACPI
+	 * systems we have to observe the FADT ACPI_FADT_NO_ASPM bit and
+	 * the _OSC method), we can't honor that request.
+	 */
+	if (aspm_disabled) {
+		pci_warn(pdev, "can't override BIOS ASPM; OS doesn't have ASPM control\n");
+		return -EPERM;
+	}
+
+	down_read(&pci_bus_sem);
+	mutex_lock(&aspm_lock);
+	link->aspm_default = 0;
+	if (state & PCIE_LINK_STATE_L0S)
+		link->aspm_default |= ASPM_STATE_L0S;
+	if (state & PCIE_LINK_STATE_L1)
+		/* L1 PM substates require L1 */
+		link->aspm_default |= ASPM_STATE_L1 | ASPM_STATE_L1SS;
+	if (state & PCIE_LINK_STATE_L1_1)
+		link->aspm_default |= ASPM_STATE_L1_1;
+	if (state & PCIE_LINK_STATE_L1_2)
+		link->aspm_default |= ASPM_STATE_L1_2;
+	if (state & PCIE_LINK_STATE_L1_1_PCIPM)
+		link->aspm_default |= ASPM_STATE_L1_1_PCIPM;
+	if (state & PCIE_LINK_STATE_L1_2_PCIPM)
+		link->aspm_default |= ASPM_STATE_L1_2_PCIPM;
+	pcie_config_aspm_link(link, policy_to_aspm_state(link));
+
+	link->clkpm_default = (state & PCIE_LINK_STATE_CLKPM) ? 1 : 0;
+	pcie_set_clkpm(link, policy_to_clkpm_state(link));
+	mutex_unlock(&aspm_lock);
+	up_read(&pci_bus_sem);
+
+	return 0;
+}
+EXPORT_SYMBOL(pci_enable_link_state);
+
 static int pcie_aspm_set_policy(const char *val,
 				const struct kernel_param *kp)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2bda4a4e4..8c35f15e6 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1651,10 +1651,15 @@ extern bool pcie_ports_native;
 #define PCIE_LINK_STATE_L1_2		BIT(4)
 #define PCIE_LINK_STATE_L1_1_PCIPM	BIT(5)
 #define PCIE_LINK_STATE_L1_2_PCIPM	BIT(6)
+#define PCIE_LINK_STATE_ALL		(PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |\
+					 PCIE_LINK_STATE_CLKPM | PCIE_LINK_STATE_L1_1 |\
+					 PCIE_LINK_STATE_L1_2 | PCIE_LINK_STATE_L1_1_PCIPM |\
+					 PCIE_LINK_STATE_L1_2_PCIPM)
 
 #ifdef CONFIG_PCIEASPM
 int pci_disable_link_state(struct pci_dev *pdev, int state);
 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
+int pci_enable_link_state(struct pci_dev *pdev, int state);
 void pcie_no_aspm(void);
 bool pcie_aspm_support_enabled(void);
 bool pcie_aspm_enabled(struct pci_dev *pdev);
@@ -1663,6 +1668,8 @@ static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
 { return 0; }
 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
 { return 0; }
+static inline int pci_enable_link_state(struct pci_dev *pdev, int state)
+{ return 0; }
 static inline void pcie_no_aspm(void) { }
 static inline bool pcie_aspm_support_enabled(void) { return false; }
 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }