From 14c200b7ca46b9a9f4af9e81d258a58274320b6f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 4 Dec 2023 16:06:01 +0100
Subject: platform/x86: intel-vbtn: Fix missing tablet-mode-switch events
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

2 issues have been reported on the Dell Inspiron 7352:

1. Sometimes the tablet-mode-switch stops reporting tablet-mode
   change events.

   Add a "VBDL" call to notify_handler() to work around this.

2. Sometimes the tablet-mode is incorrect after suspend/resume

   Add a detect_tablet_mode() to resume() to fix this.

Reported-by: Arnold Gozum <arngozum@gmail.com>
Closes: https://lore.kernel.org/platform-driver-x86/87271a74-c831-4eec-b7a4-1371d0e42471@gmail.com/
Tested-by: Arnold Gozum <arngozum@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20231204150601.46976-1-hdegoede@redhat.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel/vbtn.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel/vbtn.c b/drivers/platform/x86/intel/vbtn.c
index 6fa1735ad7a4..210b0a81b7ec 100644
--- a/drivers/platform/x86/intel/vbtn.c
+++ b/drivers/platform/x86/intel/vbtn.c
@@ -73,10 +73,10 @@ struct intel_vbtn_priv {
 	bool wakeup_mode;
 };
 
-static void detect_tablet_mode(struct platform_device *device)
+static void detect_tablet_mode(struct device *dev)
 {
-	struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
-	acpi_handle handle = ACPI_HANDLE(&device->dev);
+	struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
+	acpi_handle handle = ACPI_HANDLE(dev);
 	unsigned long long vgbs;
 	acpi_status status;
 	int m;
@@ -89,6 +89,8 @@ static void detect_tablet_mode(struct platform_device *device)
 	input_report_switch(priv->switches_dev, SW_TABLET_MODE, m);
 	m = (vgbs & VGBS_DOCK_MODE_FLAG) ? 1 : 0;
 	input_report_switch(priv->switches_dev, SW_DOCK, m);
+
+	input_sync(priv->switches_dev);
 }
 
 /*
@@ -134,7 +136,7 @@ static int intel_vbtn_input_setup(struct platform_device *device)
 	priv->switches_dev->id.bustype = BUS_HOST;
 
 	if (priv->has_switches) {
-		detect_tablet_mode(device);
+		detect_tablet_mode(&device->dev);
 
 		ret = input_register_device(priv->switches_dev);
 		if (ret)
@@ -198,6 +200,9 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
 	autorelease = val && (!ke_rel || ke_rel->type == KE_IGNORE);
 
 	sparse_keymap_report_event(input_dev, event, val, autorelease);
+
+	/* Some devices need this to report further events */
+	acpi_evaluate_object(handle, "VBDL", NULL, NULL);
 }
 
 /*
@@ -352,7 +357,13 @@ static void intel_vbtn_pm_complete(struct device *dev)
 
 static int intel_vbtn_pm_resume(struct device *dev)
 {
+	struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
+
 	intel_vbtn_pm_complete(dev);
+
+	if (priv->has_switches)
+		detect_tablet_mode(dev);
+
 	return 0;
 }
 
-- 
cgit v1.2.3


From 17fe3ec0c110b4afc04052e2a33b146766aac8a1 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Tue, 5 Dec 2023 22:01:43 -0800
Subject: platform/x86: thinkpad_acpi: fix kernel-doc warnings
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a function's return description and don't misuse "/**" for
non-kernel-doc comments to prevent warnings from scripts/kernel-doc.

thinkpad_acpi.c:523: warning: No description found for return value of 'tpacpi_check_quirks'
thinkpad_acpi.c:9307: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
thinkpad_acpi.c:9307: warning: missing initial short description on line:
 * This evaluates a ACPI method call specific to the battery

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
CC: ibm-acpi-devel@lists.sourceforge.net
CC: platform-driver-x86@vger.kernel.org
Reviewed-by: mpearson-lenovo@squebb.ca
Link: https://lore.kernel.org/r/20231206060144.8260-1-rdunlap@infradead.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d0b5fd4137bc..3392ae99ac3f 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -512,10 +512,10 @@ struct tpacpi_quirk {
  * Iterates over a quirks list until one is found that matches the
  * ThinkPad's vendor, BIOS and EC model.
  *
- * Returns 0 if nothing matches, otherwise returns the quirks field of
+ * Returns: %0 if nothing matches, otherwise returns the quirks field of
  * the matching &struct tpacpi_quirk entry.
  *
- * The match criteria is: vendor, ec and bios much match.
+ * The match criteria is: vendor, ec and bios must match.
  */
 static unsigned long __init tpacpi_check_quirks(
 			const struct tpacpi_quirk *qlist,
@@ -9303,7 +9303,7 @@ static struct tpacpi_battery_driver_data battery_info;
 
 /* ACPI helpers/functions/probes */
 
-/**
+/*
  * This evaluates a ACPI method call specific to the battery
  * ACPI extension. The specifics are that an error is marked
  * in the 32rd bit of the response, so we just check that here.
-- 
cgit v1.2.3


From 7bcd032370f88fd4022b6926d101403e96a86309 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Tue, 5 Dec 2023 22:01:18 -0800
Subject: platform/x86: intel_ips: fix kernel-doc formatting
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix kernel-doc function notation and comment formatting to prevent
warnings from scripts/kernel-doc.

for drivers/platform/x86/intel_ips.c:
595: warning: No description found for return value of 'mcp_exceeded'
624: warning: No description found for return value of 'cpu_exceeded'
650: warning: No description found for return value of 'mch_exceeded'
745: warning: bad line:                 cpu+ gpu+       cpu+gpu-        cpu-gpu+        cpu-gpu-
746: warning: bad line: cpu < gpu <     cpu+gpu+        cpu+            gpu+            nothing
753: warning: No description found for return value of 'ips_adjust'
747: warning: bad line: cpu < gpu >=    cpu+gpu-(mcp<)  cpu+gpu-(mcp<)  gpu-            gpu-
748: warning: bad line: cpu >= gpu <    cpu-gpu+(mcp<)  cpu-            cpu-gpu+(mcp<)  cpu-
749: warning: bad line: cpu >= gpu >=   cpu-gpu-        cpu-gpu-        cpu-gpu-        cpu-gpu-
945: warning: No description found for return value of 'ips_monitor'
1151: warning: No description found for return value of 'ips_irq_handler'
1301: warning: Function parameter or member 'ips' not described in 'ips_detect_cpu'
1302: warning: No description found for return value of 'ips_detect_cpu'
1358: warning: No description found for return value of 'ips_get_i915_syms'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Cc: platform-driver-x86@vger.kernel.org
Link: https://lore.kernel.org/r/20231206060120.4816-1-rdunlap@infradead.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel_ips.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c
index 4dfdbfca6841..c66808601fdd 100644
--- a/drivers/platform/x86/intel_ips.c
+++ b/drivers/platform/x86/intel_ips.c
@@ -590,6 +590,8 @@ static void ips_disable_gpu_turbo(struct ips_driver *ips)
  * @ips: IPS driver struct
  *
  * Check whether the MCP is over its thermal or power budget.
+ *
+ * Returns: %true if the temp or power has exceeded its maximum, else %false
  */
 static bool mcp_exceeded(struct ips_driver *ips)
 {
@@ -619,6 +621,8 @@ static bool mcp_exceeded(struct ips_driver *ips)
  * @cpu: CPU number to check
  *
  * Check a given CPU's average temp or power is over its limit.
+ *
+ * Returns: %true if the temp or power has exceeded its maximum, else %false
  */
 static bool cpu_exceeded(struct ips_driver *ips, int cpu)
 {
@@ -645,6 +649,8 @@ static bool cpu_exceeded(struct ips_driver *ips, int cpu)
  * @ips: IPS driver struct
  *
  * Check the MCH temp & power against their maximums.
+ *
+ * Returns: %true if the temp or power has exceeded its maximum, else %false
  */
 static bool mch_exceeded(struct ips_driver *ips)
 {
@@ -742,12 +748,13 @@ static void update_turbo_limits(struct ips_driver *ips)
  *   - down (at TDP limit)
  *     - adjust both CPU and GPU down if possible
  *
-		cpu+ gpu+	cpu+gpu-	cpu-gpu+	cpu-gpu-
-cpu < gpu <	cpu+gpu+	cpu+		gpu+		nothing
-cpu < gpu >=	cpu+gpu-(mcp<)	cpu+gpu-(mcp<)	gpu-		gpu-
-cpu >= gpu <	cpu-gpu+(mcp<)	cpu-		cpu-gpu+(mcp<)	cpu-
-cpu >= gpu >=	cpu-gpu-	cpu-gpu-	cpu-gpu-	cpu-gpu-
+ *              |cpu+ gpu+      cpu+gpu-        cpu-gpu+        cpu-gpu-
+ * cpu < gpu <  |cpu+gpu+       cpu+            gpu+            nothing
+ * cpu < gpu >= |cpu+gpu-(mcp<) cpu+gpu-(mcp<)  gpu-            gpu-
+ * cpu >= gpu < |cpu-gpu+(mcp<) cpu-            cpu-gpu+(mcp<)  cpu-
+ * cpu >= gpu >=|cpu-gpu-       cpu-gpu-        cpu-gpu-        cpu-gpu-
  *
+ * Returns: %0
  */
 static int ips_adjust(void *data)
 {
@@ -935,11 +942,13 @@ static void monitor_timeout(struct timer_list *t)
  * @data: ips driver structure
  *
  * This is the main function for the IPS driver.  It monitors power and
- * tempurature in the MCP and adjusts CPU and GPU power clams accordingly.
+ * temperature in the MCP and adjusts CPU and GPU power clamps accordingly.
  *
- * We keep a 5s moving average of power consumption and tempurature.  Using
+ * We keep a 5s moving average of power consumption and temperature.  Using
  * that data, along with CPU vs GPU preference, we adjust the power clamps
  * up or down.
+ *
+ * Returns: %0 on success or -errno on error
  */
 static int ips_monitor(void *data)
 {
@@ -1146,6 +1155,8 @@ static void dump_thermal_info(struct ips_driver *ips)
  * Handle temperature limit trigger events, generally by lowering the clamps.
  * If we're at a critical limit, we clamp back to the lowest possible value
  * to prevent emergency shutdown.
+ *
+ * Returns: IRQ_NONE or IRQ_HANDLED
  */
 static irqreturn_t ips_irq_handler(int irq, void *arg)
 {
@@ -1293,9 +1304,12 @@ static void ips_debugfs_init(struct ips_driver *ips)
 
 /**
  * ips_detect_cpu - detect whether CPU supports IPS
+ * @ips: IPS driver struct
  *
  * Walk our list and see if we're on a supported CPU.  If we find one,
  * return the limits for it.
+ *
+ * Returns: the &ips_mcp_limits struct that matches the boot CPU or %NULL
  */
 static struct ips_mcp_limits *ips_detect_cpu(struct ips_driver *ips)
 {
@@ -1352,6 +1366,8 @@ static struct ips_mcp_limits *ips_detect_cpu(struct ips_driver *ips)
  * monitor and control graphics turbo mode.  If we can find them, we can
  * enable graphics turbo, otherwise we must disable it to avoid exceeding
  * thermal and power limits in the MCP.
+ *
+ * Returns: %true if the required symbols are found, else %false
  */
 static bool ips_get_i915_syms(struct ips_driver *ips)
 {
-- 
cgit v1.2.3


From 66e92e23a72761f5b53f970aeb1badc5fd92fc74 Mon Sep 17 00:00:00 2001
From: Vishnu Sankar <vishnuocv@gmail.com>
Date: Thu, 14 Dec 2023 22:47:02 +0900
Subject: platform/x86: thinkpad_acpi: fix for incorrect fan reporting on some
 ThinkPad systems
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Some ThinkPad systems ECFW use non-standard addresses for fan control
and reporting. This patch adds support for such ECFW so that it can report
the correct fan values.
Tested on Thinkpads L13 Yoga Gen 2 and X13 Yoga Gen 2.

Suggested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Vishnu Sankar <vishnuocv@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231214134702.166464-1-vishnuocv@gmail.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 98 +++++++++++++++++++++++++++++++-----
 1 file changed, 85 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 3392ae99ac3f..c4895e9bc714 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -7948,8 +7948,19 @@ static struct ibm_struct volume_driver_data = {
  * 	TPACPI_FAN_WR_TPEC is also available and should be used to
  * 	command the fan.  The X31/X40/X41 seems to have 8 fan levels,
  * 	but the ACPI tables just mention level 7.
+ *
+ * TPACPI_FAN_RD_TPEC_NS:
+ *	This mode is used for a few ThinkPads (L13 Yoga Gen2, X13 Yoga Gen2 etc.)
+ *	that are using non-standard EC locations for reporting fan speeds.
+ *	Currently these platforms only provide fan rpm reporting.
+ *
  */
 
+#define FAN_RPM_CAL_CONST 491520	/* FAN RPM calculation offset for some non-standard ECFW */
+
+#define FAN_NS_CTRL_STATUS	BIT(2)		/* Bit which determines control is enabled or not */
+#define FAN_NS_CTRL		BIT(4)		/* Bit which determines control is by host or EC */
+
 enum {					/* Fan control constants */
 	fan_status_offset = 0x2f,	/* EC register 0x2f */
 	fan_rpm_offset = 0x84,		/* EC register 0x84: LSB, 0x85 MSB (RPM)
@@ -7957,6 +7968,11 @@ enum {					/* Fan control constants */
 	fan_select_offset = 0x31,	/* EC register 0x31 (Firmware 7M)
 					   bit 0 selects which fan is active */
 
+	fan_status_offset_ns = 0x93,	/* Special status/control offset for non-standard EC Fan1 */
+	fan2_status_offset_ns = 0x96,	/* Special status/control offset for non-standard EC Fan2 */
+	fan_rpm_status_ns = 0x95,	/* Special offset for Fan1 RPM status for non-standard EC */
+	fan2_rpm_status_ns = 0x98,	/* Special offset for Fan2 RPM status for non-standard EC */
+
 	TP_EC_FAN_FULLSPEED = 0x40,	/* EC fan mode: full speed */
 	TP_EC_FAN_AUTO	    = 0x80,	/* EC fan mode: auto fan control */
 
@@ -7967,6 +7983,7 @@ enum fan_status_access_mode {
 	TPACPI_FAN_NONE = 0,		/* No fan status or control */
 	TPACPI_FAN_RD_ACPI_GFAN,	/* Use ACPI GFAN */
 	TPACPI_FAN_RD_TPEC,		/* Use ACPI EC regs 0x2f, 0x84-0x85 */
+	TPACPI_FAN_RD_TPEC_NS,		/* Use non-standard ACPI EC regs (eg: L13 Yoga gen2 etc.) */
 };
 
 enum fan_control_access_mode {
@@ -7994,6 +8011,8 @@ static u8 fan_control_desired_level;
 static u8 fan_control_resume_level;
 static int fan_watchdog_maxinterval;
 
+static bool fan_with_ns_addr;
+
 static struct mutex fan_mutex;
 
 static void fan_watchdog_fire(struct work_struct *ignored);
@@ -8123,6 +8142,15 @@ static int fan_get_status(u8 *status)
 		}
 
 		break;
+	case TPACPI_FAN_RD_TPEC_NS:
+		/* Default mode is AUTO which means controlled by EC */
+		if (!acpi_ec_read(fan_status_offset_ns, &s))
+			return -EIO;
+
+		if (status)
+			*status = s;
+
+		break;
 
 	default:
 		return -ENXIO;
@@ -8139,7 +8167,8 @@ static int fan_get_status_safe(u8 *status)
 	if (mutex_lock_killable(&fan_mutex))
 		return -ERESTARTSYS;
 	rc = fan_get_status(&s);
-	if (!rc)
+	/* NS EC doesn't have register with level settings */
+	if (!rc && !fan_with_ns_addr)
 		fan_update_desired_level(s);
 	mutex_unlock(&fan_mutex);
 
@@ -8166,7 +8195,13 @@ static int fan_get_speed(unsigned int *speed)
 
 		if (likely(speed))
 			*speed = (hi << 8) | lo;
+		break;
+	case TPACPI_FAN_RD_TPEC_NS:
+		if (!acpi_ec_read(fan_rpm_status_ns, &lo))
+			return -EIO;
 
+		if (speed)
+			*speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
 		break;
 
 	default:
@@ -8178,7 +8213,7 @@ static int fan_get_speed(unsigned int *speed)
 
 static int fan2_get_speed(unsigned int *speed)
 {
-	u8 hi, lo;
+	u8 hi, lo, status;
 	bool rc;
 
 	switch (fan_status_access_mode) {
@@ -8194,7 +8229,21 @@ static int fan2_get_speed(unsigned int *speed)
 
 		if (likely(speed))
 			*speed = (hi << 8) | lo;
+		break;
 
+	case TPACPI_FAN_RD_TPEC_NS:
+		rc = !acpi_ec_read(fan2_status_offset_ns, &status);
+		if (rc)
+			return -EIO;
+		if (!(status & FAN_NS_CTRL_STATUS)) {
+			pr_info("secondary fan control not supported\n");
+			return -EIO;
+		}
+		rc = !acpi_ec_read(fan2_rpm_status_ns, &lo);
+		if (rc)
+			return -EIO;
+		if (speed)
+			*speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
 		break;
 
 	default:
@@ -8697,6 +8746,7 @@ static const struct attribute_group fan_driver_attr_group = {
 #define TPACPI_FAN_2FAN		0x0002		/* EC 0x31 bit 0 selects fan2 */
 #define TPACPI_FAN_2CTL		0x0004		/* selects fan2 control */
 #define TPACPI_FAN_NOFAN	0x0008		/* no fan available */
+#define TPACPI_FAN_NS		0x0010		/* For EC with non-Standard register addresses */
 
 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
 	TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
@@ -8715,6 +8765,8 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
 	TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (2nd gen) */
 	TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL),	/* P15 (1st gen) / P15v (1st gen) */
 	TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL),  /* T15g (2nd gen) */
+	TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS),	/* L13 Yoga Gen 2 */
+	TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS),	/* X13 Yoga Gen 2*/
 	TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN),	/* X1 Tablet (2nd gen) */
 };
 
@@ -8749,18 +8801,27 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 		return -ENODEV;
 	}
 
+	if (quirks & TPACPI_FAN_NS) {
+		pr_info("ECFW with non-standard fan reg control found\n");
+		fan_with_ns_addr = 1;
+		/* Fan ctrl support from host is undefined for now */
+		tp_features.fan_ctrl_status_undef = 1;
+	}
+
 	if (gfan_handle) {
 		/* 570, 600e/x, 770e, 770x */
 		fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
 	} else {
 		/* all other ThinkPads: note that even old-style
 		 * ThinkPad ECs supports the fan control register */
-		if (likely(acpi_ec_read(fan_status_offset,
-					&fan_control_initial_status))) {
+		if (fan_with_ns_addr ||
+		    likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) {
 			int res;
 			unsigned int speed;
 
-			fan_status_access_mode = TPACPI_FAN_RD_TPEC;
+			fan_status_access_mode = fan_with_ns_addr ?
+				TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC;
+
 			if (quirks & TPACPI_FAN_Q1)
 				fan_quirk1_setup();
 			/* Try and probe the 2nd fan */
@@ -8769,7 +8830,8 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 			if (res >= 0 && speed != FAN_NOT_PRESENT) {
 				/* It responded - so let's assume it's there */
 				tp_features.second_fan = 1;
-				tp_features.second_fan_ctl = 1;
+				/* fan control not currently available for ns ECFW */
+				tp_features.second_fan_ctl = !fan_with_ns_addr;
 				pr_info("secondary fan control detected & enabled\n");
 			} else {
 				/* Fan not auto-detected */
@@ -8944,6 +9006,7 @@ static int fan_read(struct seq_file *m)
 			       str_enabled_disabled(status), status);
 		break;
 
+	case TPACPI_FAN_RD_TPEC_NS:
 	case TPACPI_FAN_RD_TPEC:
 		/* all except 570, 600e/x, 770e, 770x */
 		rc = fan_get_status_safe(&status);
@@ -8958,13 +9021,22 @@ static int fan_read(struct seq_file *m)
 
 		seq_printf(m, "speed:\t\t%d\n", speed);
 
-		if (status & TP_EC_FAN_FULLSPEED)
-			/* Disengaged mode takes precedence */
-			seq_printf(m, "level:\t\tdisengaged\n");
-		else if (status & TP_EC_FAN_AUTO)
-			seq_printf(m, "level:\t\tauto\n");
-		else
-			seq_printf(m, "level:\t\t%d\n", status);
+		if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) {
+			/*
+			 * No full speed bit in NS EC
+			 * EC Auto mode is set by default.
+			 * No other levels settings available
+			 */
+			seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto");
+		} else {
+			if (status & TP_EC_FAN_FULLSPEED)
+				/* Disengaged mode takes precedence */
+				seq_printf(m, "level:\t\tdisengaged\n");
+			else if (status & TP_EC_FAN_AUTO)
+				seq_printf(m, "level:\t\tauto\n");
+			else
+				seq_printf(m, "level:\t\t%d\n", status);
+		}
 		break;
 
 	case TPACPI_FAN_NONE:
-- 
cgit v1.2.3


From fbcf67ce5a9e2831c14bdfb895be05213e611724 Mon Sep 17 00:00:00 2001
From: Rajvi Jingar <rajvi.jingar@linux.intel.com>
Date: Fri, 15 Dec 2023 17:16:50 -0800
Subject: platform/x86/intel/pmc: Fix hang in pmc_core_send_ltr_ignore()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

For input value 0, PMC stays unassigned which causes crash while trying
to access PMC for register read/write. Include LTR index 0 in pmc_index
and ltr_index calculation.

Fixes: 2bcef4529222 ("platform/x86:intel/pmc: Enable debugfs multiple PMC support")
Signed-off-by: Rajvi Jingar <rajvi.jingar@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231216011650.1973941-1-rajvi.jingar@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 84c175b9721a..e95d3011b999 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -472,7 +472,7 @@ int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value)
 	 * is based on the contiguous indexes from ltr_show output.
 	 * pmc index and ltr index needs to be calculated from it.
 	 */
-	for (pmc_index = 0; pmc_index < ARRAY_SIZE(pmcdev->pmcs) && ltr_index > 0; pmc_index++) {
+	for (pmc_index = 0; pmc_index < ARRAY_SIZE(pmcdev->pmcs) && ltr_index >= 0; pmc_index++) {
 		pmc = pmcdev->pmcs[pmc_index];
 
 		if (!pmc)
-- 
cgit v1.2.3


From 85980669a863514dd47761efd6c1bc4677a2ae08 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 11 Dec 2023 22:50:03 -0600
Subject: platform/x86/amd/pmc: Move platform defines to header
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The platform defines will be used by the quirks in the future,
so move them to the common header to allow use by both source
files.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-2-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/amd/pmc/pmc.c | 10 ----------
 drivers/platform/x86/amd/pmc/pmc.h | 11 +++++++++++
 2 files changed, 11 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
index c3104714b480..666cc6e98267 100644
--- a/drivers/platform/x86/amd/pmc/pmc.c
+++ b/drivers/platform/x86/amd/pmc/pmc.c
@@ -91,16 +91,6 @@
 #define SMU_MSG_LOG_RESET		0x07
 #define SMU_MSG_LOG_DUMP_DATA		0x08
 #define SMU_MSG_GET_SUP_CONSTRAINTS	0x09
-/* List of supported CPU ids */
-#define AMD_CPU_ID_RV			0x15D0
-#define AMD_CPU_ID_RN			0x1630
-#define AMD_CPU_ID_PCO			AMD_CPU_ID_RV
-#define AMD_CPU_ID_CZN			AMD_CPU_ID_RN
-#define AMD_CPU_ID_YC			0x14B5
-#define AMD_CPU_ID_CB			0x14D8
-#define AMD_CPU_ID_PS			0x14E8
-#define AMD_CPU_ID_SP			0x14A4
-#define PCI_DEVICE_ID_AMD_1AH_M20H_ROOT 0x1507
 
 #define PMC_MSG_DELAY_MIN_US		50
 #define RESPONSE_REGISTER_LOOP_MAX	20000
diff --git a/drivers/platform/x86/amd/pmc/pmc.h b/drivers/platform/x86/amd/pmc/pmc.h
index c27bd6a5642f..a85c235247d3 100644
--- a/drivers/platform/x86/amd/pmc/pmc.h
+++ b/drivers/platform/x86/amd/pmc/pmc.h
@@ -41,4 +41,15 @@ struct amd_pmc_dev {
 void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev);
 void amd_pmc_quirks_init(struct amd_pmc_dev *dev);
 
+/* List of supported CPU ids */
+#define AMD_CPU_ID_RV			0x15D0
+#define AMD_CPU_ID_RN			0x1630
+#define AMD_CPU_ID_PCO			AMD_CPU_ID_RV
+#define AMD_CPU_ID_CZN			AMD_CPU_ID_RN
+#define AMD_CPU_ID_YC			0x14B5
+#define AMD_CPU_ID_CB			0x14D8
+#define AMD_CPU_ID_PS			0x14E8
+#define AMD_CPU_ID_SP			0x14A4
+#define PCI_DEVICE_ID_AMD_1AH_M20H_ROOT 0x1507
+
 #endif /* PMC_H */
-- 
cgit v1.2.3


From 2d53c0ab61e62302d7b62d660fe76de2bff6bf45 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 11 Dec 2023 22:50:04 -0600
Subject: platform/x86/amd/pmc: Only run IRQ1 firmware version check on Cezanne
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

amd_pmc_wa_czn_irq1() only runs on Cezanne platforms currently but
may be extended to other platforms in the future.  Rename the function
and only check platform firmware version when it's called for a Cezanne
based platform.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-3-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/amd/pmc/pmc.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
index 666cc6e98267..824673a8673e 100644
--- a/drivers/platform/x86/amd/pmc/pmc.c
+++ b/drivers/platform/x86/amd/pmc/pmc.c
@@ -756,19 +756,22 @@ static int amd_pmc_get_os_hint(struct amd_pmc_dev *dev)
 	return -EINVAL;
 }
 
-static int amd_pmc_czn_wa_irq1(struct amd_pmc_dev *pdev)
+static int amd_pmc_wa_irq1(struct amd_pmc_dev *pdev)
 {
 	struct device *d;
 	int rc;
 
-	if (!pdev->major) {
-		rc = amd_pmc_get_smu_version(pdev);
-		if (rc)
-			return rc;
-	}
+	/* cezanne platform firmware has a fix in 64.66.0 */
+	if (pdev->cpu_id == AMD_CPU_ID_CZN) {
+		if (!pdev->major) {
+			rc = amd_pmc_get_smu_version(pdev);
+			if (rc)
+				return rc;
+		}
 
-	if (pdev->major > 64 || (pdev->major == 64 && pdev->minor > 65))
-		return 0;
+		if (pdev->major > 64 || (pdev->major == 64 && pdev->minor > 65))
+			return 0;
+	}
 
 	d = bus_find_device_by_name(&serio_bus, NULL, "serio0");
 	if (!d)
@@ -928,7 +931,7 @@ static int amd_pmc_suspend_handler(struct device *dev)
 	struct amd_pmc_dev *pdev = dev_get_drvdata(dev);
 
 	if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
-		int rc = amd_pmc_czn_wa_irq1(pdev);
+		int rc = amd_pmc_wa_irq1(pdev);
 
 		if (rc) {
 			dev_err(pdev->dev, "failed to adjust keyboard wakeup: %d\n", rc);
-- 
cgit v1.2.3


From b614a4bd73efeddc2b20d9e6deb6c2710373802b Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 11 Dec 2023 22:50:05 -0600
Subject: platform/x86/amd/pmc: Move keyboard wakeup disablement detection to
 pmc-quirks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Other platforms may need to disable keyboard wakeup besides Cezanne,
so move the detection into amd_pmc_quirks_init() where it may be applied
to multiple platforms.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-4-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/amd/pmc/pmc-quirks.c | 3 +++
 drivers/platform/x86/amd/pmc/pmc.c        | 2 +-
 drivers/platform/x86/amd/pmc/pmc.h        | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index 6bbffb081053..c32046dfa960 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -235,6 +235,9 @@ void amd_pmc_quirks_init(struct amd_pmc_dev *dev)
 {
 	const struct dmi_system_id *dmi_id;
 
+	if (dev->cpu_id == AMD_CPU_ID_CZN)
+		dev->disable_8042_wakeup = true;
+
 	dmi_id = dmi_first_match(fwbug_list);
 	if (!dmi_id)
 		return;
diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
index 824673a8673e..864c8cc2f8a3 100644
--- a/drivers/platform/x86/amd/pmc/pmc.c
+++ b/drivers/platform/x86/amd/pmc/pmc.c
@@ -930,7 +930,7 @@ static int amd_pmc_suspend_handler(struct device *dev)
 {
 	struct amd_pmc_dev *pdev = dev_get_drvdata(dev);
 
-	if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
+	if (pdev->disable_8042_wakeup && !disable_workarounds) {
 		int rc = amd_pmc_wa_irq1(pdev);
 
 		if (rc) {
diff --git a/drivers/platform/x86/amd/pmc/pmc.h b/drivers/platform/x86/amd/pmc/pmc.h
index a85c235247d3..b4794f118739 100644
--- a/drivers/platform/x86/amd/pmc/pmc.h
+++ b/drivers/platform/x86/amd/pmc/pmc.h
@@ -36,6 +36,7 @@ struct amd_pmc_dev {
 	struct mutex lock; /* generic mutex lock */
 	struct dentry *dbgfs_dir;
 	struct quirk_entry *quirks;
+	bool disable_8042_wakeup;
 };
 
 void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev);
-- 
cgit v1.2.3


From a55bdad5dfd1efd4ed9ffe518897a21ca8e4e193 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 11 Dec 2023 22:50:06 -0600
Subject: platform/x86/amd/pmc: Disable keyboard wakeup on AMD Framework 13
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The Laptop 13 (AMD Ryzen 7040Series) BIOS 03.03 has a workaround
included in the EC firmware that will cause the EC to emit a "spurious"
keypress during the resume from s0i3 [1].

This series of keypress events can be observed in the kernel log on
resume.

```
atkbd serio0: Unknown key pressed (translated set 2, code 0x6b on isa0060/serio0).
atkbd serio0: Use 'setkeycodes 6b <keycode>' to make it known.
atkbd serio0: Unknown key released (translated set 2, code 0x6b on isa0060/serio0).
atkbd serio0: Use 'setkeycodes 6b <keycode>' to make it known.
```

In some user flows this is harmless, but if a user has specifically
suspended the laptop and then closed the lid it will cause the laptop
to wakeup. The laptop wakes up because the ACPI SCI triggers when
the lid is closed and when the kernel sees that IRQ1 is "also" active.
The kernel can't distinguish from a real keyboard keypress and wakes the
system.

Add the model into the list of quirks to disable keyboard wakeup source.
This is intentionally only matching the production BIOS version in hopes
that a newer EC firmware included in a newer BIOS can avoid this behavior.

Cc: Kieran Levin <ktl@framework.net>
Link: https://github.com/FrameworkComputer/EmbeddedController/blob/lotus-zephyr/zephyr/program/lotus/azalea/src/power_sequence.c#L313 [1]
Link: https://community.frame.work/t/amd-wont-sleep-properly/41755
Link: https://community.frame.work/t/tracking-framework-amd-ryzen-7040-series-lid-wakeup-behavior-feedback/39128
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-5-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/amd/pmc/pmc-quirks.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'drivers')

diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index c32046dfa960..b456370166b6 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -16,12 +16,17 @@
 
 struct quirk_entry {
 	u32 s2idle_bug_mmio;
+	bool spurious_8042;
 };
 
 static struct quirk_entry quirk_s2idle_bug = {
 	.s2idle_bug_mmio = 0xfed80380,
 };
 
+static struct quirk_entry quirk_spurious_8042 = {
+	.spurious_8042 = true,
+};
+
 static const struct dmi_system_id fwbug_list[] = {
 	{
 		.ident = "L14 Gen2 AMD",
@@ -193,6 +198,16 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "HP Laptop 15s-eq2xxx"),
 		}
 	},
+	/* https://community.frame.work/t/tracking-framework-amd-ryzen-7040-series-lid-wakeup-behavior-feedback/39128 */
+	{
+		.ident = "Framework Laptop 13 (Phoenix)",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Framework"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Laptop 13 (AMD Ryzen 7040Series)"),
+			DMI_MATCH(DMI_BIOS_VERSION, "03.03"),
+		}
+	},
 	{}
 };
 
@@ -245,4 +260,6 @@ void amd_pmc_quirks_init(struct amd_pmc_dev *dev)
 	if (dev->quirks->s2idle_bug_mmio)
 		pr_info("Using s2idle quirk to avoid %s platform firmware bug\n",
 			dmi_id->ident);
+	if (dev->quirks->spurious_8042)
+		dev->disable_8042_wakeup = true;
 }
-- 
cgit v1.2.3


From b28ff7a7c3245d7f62acc20f15b4361292fe4117 Mon Sep 17 00:00:00 2001
From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Date: Fri, 29 Dec 2023 15:39:11 +0900
Subject: platform/x86: p2sb: Allow p2sb_bar() calls during PCI device probe
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

p2sb_bar() unhides P2SB device to get resources from the device. It
guards the operation by locking pci_rescan_remove_lock so that parallel
rescans do not find the P2SB device. However, this lock causes deadlock
when PCI bus rescan is triggered by /sys/bus/pci/rescan. The rescan
locks pci_rescan_remove_lock and probes PCI devices. When PCI devices
call p2sb_bar() during probe, it locks pci_rescan_remove_lock again.
Hence the deadlock.

To avoid the deadlock, do not lock pci_rescan_remove_lock in p2sb_bar().
Instead, do the lock at fs_initcall. Introduce p2sb_cache_resources()
for fs_initcall which gets and caches the P2SB resources. At p2sb_bar(),
refer the cache and return to the caller.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: 9745fb07474f ("platform/x86/intel: Add Primary to Sideband (P2SB) bridge support")
Cc: stable@vger.kernel.org
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/linux-pci/6xb24fjmptxxn5js2fjrrddjae6twex5bjaftwqsuawuqqqydx@7cl3uik5ef6j/
Link: https://lore.kernel.org/r/20231229063912.2517922-2-shinichiro.kawasaki@wdc.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/p2sb.c | 172 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 131 insertions(+), 41 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/p2sb.c b/drivers/platform/x86/p2sb.c
index 1cf2471d54dd..fcf1ce8bbdc5 100644
--- a/drivers/platform/x86/p2sb.c
+++ b/drivers/platform/x86/p2sb.c
@@ -26,6 +26,21 @@ static const struct x86_cpu_id p2sb_cpu_ids[] = {
 	{}
 };
 
+/*
+ * Cache BAR0 of P2SB device functions 0 to 7.
+ * TODO: The constant 8 is the number of functions that PCI specification
+ *       defines. Same definitions exist tree-wide. Unify this definition and
+ *       the other definitions then move to include/uapi/linux/pci.h.
+ */
+#define NR_P2SB_RES_CACHE 8
+
+struct p2sb_res_cache {
+	u32 bus_dev_id;
+	struct resource res;
+};
+
+static struct p2sb_res_cache p2sb_resources[NR_P2SB_RES_CACHE];
+
 static int p2sb_get_devfn(unsigned int *devfn)
 {
 	unsigned int fn = P2SB_DEVFN_DEFAULT;
@@ -39,8 +54,16 @@ static int p2sb_get_devfn(unsigned int *devfn)
 	return 0;
 }
 
+static bool p2sb_valid_resource(struct resource *res)
+{
+	if (res->flags)
+		return true;
+
+	return false;
+}
+
 /* Copy resource from the first BAR of the device in question */
-static int p2sb_read_bar0(struct pci_dev *pdev, struct resource *mem)
+static void p2sb_read_bar0(struct pci_dev *pdev, struct resource *mem)
 {
 	struct resource *bar0 = &pdev->resource[0];
 
@@ -56,47 +79,64 @@ static int p2sb_read_bar0(struct pci_dev *pdev, struct resource *mem)
 	mem->end = bar0->end;
 	mem->flags = bar0->flags;
 	mem->desc = bar0->desc;
-
-	return 0;
 }
 
-static int p2sb_scan_and_read(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+static void p2sb_scan_and_cache_devfn(struct pci_bus *bus, unsigned int devfn)
 {
+	struct p2sb_res_cache *cache = &p2sb_resources[PCI_FUNC(devfn)];
 	struct pci_dev *pdev;
-	int ret;
 
 	pdev = pci_scan_single_device(bus, devfn);
 	if (!pdev)
-		return -ENODEV;
+		return;
 
-	ret = p2sb_read_bar0(pdev, mem);
+	p2sb_read_bar0(pdev, &cache->res);
+	cache->bus_dev_id = bus->dev.id;
 
 	pci_stop_and_remove_bus_device(pdev);
-	return ret;
+	return;
 }
 
-/**
- * p2sb_bar - Get Primary to Sideband (P2SB) bridge device BAR
- * @bus: PCI bus to communicate with
- * @devfn: PCI slot and function to communicate with
- * @mem: memory resource to be filled in
- *
- * The BIOS prevents the P2SB device from being enumerated by the PCI
- * subsystem, so we need to unhide and hide it back to lookup the BAR.
- *
- * if @bus is NULL, the bus 0 in domain 0 will be used.
- * If @devfn is 0, it will be replaced by devfn of the P2SB device.
- *
- * Caller must provide a valid pointer to @mem.
- *
- * Locking is handled by pci_rescan_remove_lock mutex.
- *
- * Return:
- * 0 on success or appropriate errno value on error.
- */
-int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+static int p2sb_scan_and_cache(struct pci_bus *bus, unsigned int devfn)
+{
+	unsigned int slot, fn;
+
+	if (PCI_FUNC(devfn) == 0) {
+		/*
+		 * When function number of the P2SB device is zero, scan it and
+		 * other function numbers, and if devices are available, cache
+		 * their BAR0s.
+		 */
+		slot = PCI_SLOT(devfn);
+		for (fn = 0; fn < NR_P2SB_RES_CACHE; fn++)
+			p2sb_scan_and_cache_devfn(bus, PCI_DEVFN(slot, fn));
+	} else {
+		/* Scan the P2SB device and cache its BAR0 */
+		p2sb_scan_and_cache_devfn(bus, devfn);
+	}
+
+	if (!p2sb_valid_resource(&p2sb_resources[PCI_FUNC(devfn)].res))
+		return -ENOENT;
+
+	return 0;
+}
+
+static struct pci_bus *p2sb_get_bus(struct pci_bus *bus)
+{
+	static struct pci_bus *p2sb_bus;
+
+	bus = bus ?: p2sb_bus;
+	if (bus)
+		return bus;
+
+	/* Assume P2SB is on the bus 0 in domain 0 */
+	p2sb_bus = pci_find_bus(0, 0);
+	return p2sb_bus;
+}
+
+static int p2sb_cache_resources(void)
 {
-	struct pci_dev *pdev_p2sb;
+	struct pci_bus *bus;
 	unsigned int devfn_p2sb;
 	u32 value = P2SBC_HIDE;
 	int ret;
@@ -106,8 +146,9 @@ int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
 	if (ret)
 		return ret;
 
-	/* if @bus is NULL, use bus 0 in domain 0 */
-	bus = bus ?: pci_find_bus(0, 0);
+	bus = p2sb_get_bus(NULL);
+	if (!bus)
+		return -ENODEV;
 
 	/*
 	 * Prevent concurrent PCI bus scan from seeing the P2SB device and
@@ -115,17 +156,16 @@ int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
 	 */
 	pci_lock_rescan_remove();
 
-	/* Unhide the P2SB device, if needed */
+	/*
+	 * The BIOS prevents the P2SB device from being enumerated by the PCI
+	 * subsystem, so we need to unhide and hide it back to lookup the BAR.
+	 * Unhide the P2SB device here, if needed.
+	 */
 	pci_bus_read_config_dword(bus, devfn_p2sb, P2SBC, &value);
 	if (value & P2SBC_HIDE)
 		pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, 0);
 
-	pdev_p2sb = pci_scan_single_device(bus, devfn_p2sb);
-	if (devfn)
-		ret = p2sb_scan_and_read(bus, devfn, mem);
-	else
-		ret = p2sb_read_bar0(pdev_p2sb, mem);
-	pci_stop_and_remove_bus_device(pdev_p2sb);
+	ret = p2sb_scan_and_cache(bus, devfn_p2sb);
 
 	/* Hide the P2SB device, if it was hidden */
 	if (value & P2SBC_HIDE)
@@ -133,12 +173,62 @@ int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
 
 	pci_unlock_rescan_remove();
 
-	if (ret)
-		return ret;
+	return ret;
+}
+
+/**
+ * p2sb_bar - Get Primary to Sideband (P2SB) bridge device BAR
+ * @bus: PCI bus to communicate with
+ * @devfn: PCI slot and function to communicate with
+ * @mem: memory resource to be filled in
+ *
+ * If @bus is NULL, the bus 0 in domain 0 will be used.
+ * If @devfn is 0, it will be replaced by devfn of the P2SB device.
+ *
+ * Caller must provide a valid pointer to @mem.
+ *
+ * Return:
+ * 0 on success or appropriate errno value on error.
+ */
+int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+{
+	struct p2sb_res_cache *cache;
+	int ret;
 
-	if (mem->flags == 0)
+	bus = p2sb_get_bus(bus);
+	if (!bus)
 		return -ENODEV;
 
+	if (!devfn) {
+		ret = p2sb_get_devfn(&devfn);
+		if (ret)
+			return ret;
+	}
+
+	cache = &p2sb_resources[PCI_FUNC(devfn)];
+	if (cache->bus_dev_id != bus->dev.id)
+		return -ENODEV;
+
+	if (!p2sb_valid_resource(&cache->res))
+		return -ENOENT;
+
+	memcpy(mem, &cache->res, sizeof(*mem));
 	return 0;
 }
 EXPORT_SYMBOL_GPL(p2sb_bar);
+
+static int __init p2sb_fs_init(void)
+{
+	p2sb_cache_resources();
+	return 0;
+}
+
+/*
+ * pci_rescan_remove_lock to avoid access to unhidden P2SB devices can
+ * not be locked in sysfs pci bus rescan path because of deadlock. To
+ * avoid the deadlock, access to P2SB devices with the lock at an early
+ * step in kernel initialization and cache required resources. This
+ * should happen after subsys_initcall which initializes PCI subsystem
+ * and before device_initcall which requires P2SB resources.
+ */
+fs_initcall(p2sb_fs_init);
-- 
cgit v1.2.3


From 7c13f365aee68b01e7e68ee293a71fdc7571c111 Mon Sep 17 00:00:00 2001
From: "David E. Box" <david.e.box@linux.intel.com>
Date: Fri, 22 Dec 2023 19:25:43 -0800
Subject: platform/x86/intel/pmc: Add suspend callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a suspend callback to struct pmc for performing platform specific tasks
before device suspend. This is needed in order to perform GBE LTR ignore on
certain platforms at suspend-time instead of at probe-time and replace the
GBE LTR ignore removal that was done in order to fix a bug introduced by
commit 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and
core_configure()").

Fixes: 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()")
Signed-off-by: "David E. Box" <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20231223032548.1680738-4-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/core.c | 3 +++
 drivers/platform/x86/intel/pmc/core.h | 2 ++
 2 files changed, 5 insertions(+)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index e95d3011b999..5ab470d87ad7 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -1279,6 +1279,9 @@ static __maybe_unused int pmc_core_suspend(struct device *dev)
 	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
 
+	if (pmcdev->suspend)
+		pmcdev->suspend(pmcdev);
+
 	/* Check if the syspend will actually use S0ix */
 	if (pm_suspend_via_firmware())
 		return 0;
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 0729f593c6a7..38d888e3afa6 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -363,6 +363,7 @@ struct pmc {
  * @s0ix_counter:	S0ix residency (step adjusted)
  * @num_lpm_modes:	Count of enabled modes
  * @lpm_en_modes:	Array of enabled modes from lowest to highest priority
+ * @suspend:		Function to perform platform specific suspend
  * @resume:		Function to perform platform specific resume
  *
  * pmc_dev contains info about power management controller device.
@@ -379,6 +380,7 @@ struct pmc_dev {
 	u64 s0ix_counter;
 	int num_lpm_modes;
 	int lpm_en_modes[LPM_MAX_NUM_MODES];
+	void (*suspend)(struct pmc_dev *pmcdev);
 	int (*resume)(struct pmc_dev *pmcdev);
 
 	bool has_die_c6;
-- 
cgit v1.2.3


From 6f9cc5c1f94daa98846b2073733d03ced709704b Mon Sep 17 00:00:00 2001
From: "David E. Box" <david.e.box@linux.intel.com>
Date: Fri, 22 Dec 2023 19:25:44 -0800
Subject: platform/x86/intel/pmc: Allow reenabling LTRs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and
core_configure()") caused a network performance regression due to the GBE
LTR ignore that it added during probe. The fix will move the ignore to
occur at suspend-time (so as to not affect suspend power). This will
require the ability to enable the LTR again on resume. Modify
pmc_core_send_ltr_ignore() to allow enabling an LTR.

Fixes: 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()")
Signed-off-by: "David E. Box" <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20231223032548.1680738-5-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/adl.c  | 2 +-
 drivers/platform/x86/intel/pmc/cnp.c  | 2 +-
 drivers/platform/x86/intel/pmc/core.c | 9 ++++++---
 drivers/platform/x86/intel/pmc/core.h | 2 +-
 drivers/platform/x86/intel/pmc/mtl.c  | 2 +-
 drivers/platform/x86/intel/pmc/tgl.c  | 2 +-
 6 files changed, 11 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel/pmc/adl.c b/drivers/platform/x86/intel/pmc/adl.c
index 5006008e01be..a887c388cf16 100644
--- a/drivers/platform/x86/intel/pmc/adl.c
+++ b/drivers/platform/x86/intel/pmc/adl.c
@@ -323,7 +323,7 @@ int adl_core_init(struct pmc_dev *pmcdev)
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
 	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3);
+	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
 
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/cnp.c b/drivers/platform/x86/intel/pmc/cnp.c
index 420aaa1d7c76..10498204962c 100644
--- a/drivers/platform/x86/intel/pmc/cnp.c
+++ b/drivers/platform/x86/intel/pmc/cnp.c
@@ -218,7 +218,7 @@ int cnp_core_init(struct pmc_dev *pmcdev)
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
 	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3);
+	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
 
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 5ab470d87ad7..022afb97d531 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -460,7 +460,7 @@ out_unlock:
 }
 DEFINE_SHOW_ATTRIBUTE(pmc_core_pll);
 
-int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value)
+int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value, int ignore)
 {
 	struct pmc *pmc;
 	const struct pmc_reg_map *map;
@@ -498,7 +498,10 @@ int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value)
 	mutex_lock(&pmcdev->lock);
 
 	reg = pmc_core_reg_read(pmc, map->ltr_ignore_offset);
-	reg |= BIT(ltr_index);
+	if (ignore)
+		reg |= BIT(ltr_index);
+	else
+		reg &= ~BIT(ltr_index);
 	pmc_core_reg_write(pmc, map->ltr_ignore_offset, reg);
 
 	mutex_unlock(&pmcdev->lock);
@@ -521,7 +524,7 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file,
 	if (err)
 		return err;
 
-	err = pmc_core_send_ltr_ignore(pmcdev, value);
+	err = pmc_core_send_ltr_ignore(pmcdev, value, 1);
 
 	return err == 0 ? count : err;
 }
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 38d888e3afa6..71ba7d691d69 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -488,7 +488,7 @@ extern const struct pmc_bit_map *mtl_ioem_lpm_maps[];
 extern const struct pmc_reg_map mtl_ioem_reg_map;
 
 extern void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev);
-extern int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value);
+int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value, int ignore);
 
 int pmc_core_resume_common(struct pmc_dev *pmcdev);
 int get_primary_reg_base(struct pmc *pmc);
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
index 2204bc666980..71dc11811e11 100644
--- a/drivers/platform/x86/intel/pmc/mtl.c
+++ b/drivers/platform/x86/intel/pmc/mtl.c
@@ -1006,7 +1006,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
 	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3);
+	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
 
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/tgl.c b/drivers/platform/x86/intel/pmc/tgl.c
index 2449940102db..078263db24c7 100644
--- a/drivers/platform/x86/intel/pmc/tgl.c
+++ b/drivers/platform/x86/intel/pmc/tgl.c
@@ -268,7 +268,7 @@ int tgl_core_init(struct pmc_dev *pmcdev)
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
 	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3);
+	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
 
 	return 0;
 }
-- 
cgit v1.2.3


From 70681aa0746ae61d7668b9f651221fad5e30c71e Mon Sep 17 00:00:00 2001
From: "David E. Box" <david.e.box@linux.intel.com>
Date: Fri, 22 Dec 2023 19:25:45 -0800
Subject: platform/x86/intel/pmc: Move GBE LTR ignore to suspend callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and
core_configure()") caused a network performance regression due to the GBE
LTR ignore that it added at probe. This was needed in order to allow the
SoC to enter the deepest Package C state. To fix the regression and at
least support PC10 during suspend, move the LTR ignore from probe to the
suspend callback, and enable it again on resume. This solution will allow
PC10 during suspend but restrict Package C entry at runtime to no deeper
than PC8/9 while a network cable it attach to the PCH LAN.

Fixes: 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()")
Signed-off-by: "David E. Box" <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20231223032548.1680738-6-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/adl.c  |  9 +++------
 drivers/platform/x86/intel/pmc/cnp.c  | 26 ++++++++++++++++++++------
 drivers/platform/x86/intel/pmc/core.h |  3 +++
 drivers/platform/x86/intel/pmc/mtl.c  |  9 +++------
 drivers/platform/x86/intel/pmc/tgl.c  |  9 ++++-----
 5 files changed, 33 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/x86/intel/pmc/adl.c b/drivers/platform/x86/intel/pmc/adl.c
index a887c388cf16..606f7678bcb0 100644
--- a/drivers/platform/x86/intel/pmc/adl.c
+++ b/drivers/platform/x86/intel/pmc/adl.c
@@ -314,16 +314,13 @@ int adl_core_init(struct pmc_dev *pmcdev)
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
 	int ret;
 
+	pmcdev->suspend = cnl_suspend;
+	pmcdev->resume = cnl_resume;
+
 	pmc->map = &adl_reg_map;
 	ret = get_primary_reg_base(pmc);
 	if (ret)
 		return ret;
 
-	/* Due to a hardware limitation, the GBE LTR blocks PC10
-	 * when a cable is attached. Tell the PMC to ignore it.
-	 */
-	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
-
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/cnp.c b/drivers/platform/x86/intel/pmc/cnp.c
index 10498204962c..98b36651201a 100644
--- a/drivers/platform/x86/intel/pmc/cnp.c
+++ b/drivers/platform/x86/intel/pmc/cnp.c
@@ -204,21 +204,35 @@ const struct pmc_reg_map cnp_reg_map = {
 	.etr3_offset = ETR3_OFFSET,
 };
 
+void cnl_suspend(struct pmc_dev *pmcdev)
+{
+	/*
+	 * Due to a hardware limitation, the GBE LTR blocks PC10
+	 * when a cable is attached. To unblock PC10 during suspend,
+	 * tell the PMC to ignore it.
+	 */
+	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
+}
+
+int cnl_resume(struct pmc_dev *pmcdev)
+{
+	pmc_core_send_ltr_ignore(pmcdev, 3, 0);
+
+	return pmc_core_resume_common(pmcdev);
+}
+
 int cnp_core_init(struct pmc_dev *pmcdev)
 {
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
 	int ret;
 
+	pmcdev->suspend = cnl_suspend;
+	pmcdev->resume = cnl_resume;
+
 	pmc->map = &cnp_reg_map;
 	ret = get_primary_reg_base(pmc);
 	if (ret)
 		return ret;
 
-	/* Due to a hardware limitation, the GBE LTR blocks PC10
-	 * when a cable is attached. Tell the PMC to ignore it.
-	 */
-	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
-
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 71ba7d691d69..b66dacbfb94b 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -502,6 +502,9 @@ int tgl_core_init(struct pmc_dev *pmcdev);
 int adl_core_init(struct pmc_dev *pmcdev);
 int mtl_core_init(struct pmc_dev *pmcdev);
 
+void cnl_suspend(struct pmc_dev *pmcdev);
+int cnl_resume(struct pmc_dev *pmcdev);
+
 #define pmc_for_each_mode(i, mode, pmcdev)		\
 	for (i = 0, mode = pmcdev->lpm_en_modes[i];	\
 	     i < pmcdev->num_lpm_modes;			\
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
index 71dc11811e11..504e3e273c32 100644
--- a/drivers/platform/x86/intel/pmc/mtl.c
+++ b/drivers/platform/x86/intel/pmc/mtl.c
@@ -979,6 +979,8 @@ static void mtl_d3_fixup(void)
 static int mtl_resume(struct pmc_dev *pmcdev)
 {
 	mtl_d3_fixup();
+	pmc_core_send_ltr_ignore(pmcdev, 3, 0);
+
 	return pmc_core_resume_common(pmcdev);
 }
 
@@ -989,6 +991,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
 
 	mtl_d3_fixup();
 
+	pmcdev->suspend = cnl_suspend;
 	pmcdev->resume = mtl_resume;
 
 	pmcdev->regmap_list = mtl_pmc_info_list;
@@ -1002,11 +1005,5 @@ int mtl_core_init(struct pmc_dev *pmcdev)
 			return ret;
 	}
 
-	/* Due to a hardware limitation, the GBE LTR blocks PC10
-	 * when a cable is attached. Tell the PMC to ignore it.
-	 */
-	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
-
 	return 0;
 }
diff --git a/drivers/platform/x86/intel/pmc/tgl.c b/drivers/platform/x86/intel/pmc/tgl.c
index 078263db24c7..e88d3d00c853 100644
--- a/drivers/platform/x86/intel/pmc/tgl.c
+++ b/drivers/platform/x86/intel/pmc/tgl.c
@@ -259,16 +259,15 @@ int tgl_core_init(struct pmc_dev *pmcdev)
 	int ret;
 
 	pmc->map = &tgl_reg_map;
+
+	pmcdev->suspend = cnl_suspend;
+	pmcdev->resume = cnl_resume;
+
 	ret = get_primary_reg_base(pmc);
 	if (ret)
 		return ret;
 
 	pmc_core_get_tgl_lpm_reqs(pmcdev->pdev);
-	/* Due to a hardware limitation, the GBE LTR blocks PC10
-	 * when a cable is attached. Tell the PMC to ignore it.
-	 */
-	dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
-	pmc_core_send_ltr_ignore(pmcdev, 3, 1);
 
 	return 0;
 }
-- 
cgit v1.2.3