linux-kernel - [PATCH] platform/x86: Add support for improved performance mode

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Message-ID: <20231108162039.13737-1-mpearson-lenovo@squebb.ca>
Date:   Wed,  8 Nov 2023 11:20:26 -0500
From:   Mark Pearson <mpearson-lenovo@...ebb.ca>
To:     mpearson-lenovo@...ebb.ca
Cc:     platform-driver-x86@...r.kernel.org, hdegoede@...hat.com,
        ibm-acpi-devel@...ts.sourceforge.net, mario.limonciello@....com,
        linux-kernel@...r.kernel.org
Subject: [PATCH] platform/x86: Add support for improved performance mode

Some new Thinkpads have a new improved performance mode available.
Add support to make this mode usable.

To avoid having to create a new profile, just use the improved performance
mode in place of the existing performance mode, when available.

Tested on T14 AMD G4 AMD.

Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
---
 drivers/platform/x86/thinkpad_acpi.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index ad460417f901..eba701ab340e 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10136,6 +10136,7 @@ static struct ibm_struct proxsensor_driver_data = {
 
 #define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
 #define DYTC_CMD_MMC_GET      8 /* To get current MMC function and mode */
+#define DYTC_CMD_UP_CAP     0xA /* To get Ultra-performance capability */
 #define DYTC_CMD_RESET    0x1ff /* To reset back to default */
 
 #define DYTC_CMD_FUNC_CAP     3 /* To get DYTC capabilities */
@@ -10152,6 +10153,7 @@ static struct ibm_struct proxsensor_driver_data = {
 
 #define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
 #define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
+#define DYTC_FUNCTION_TMS     9  /* Function = 9, TMS mode */
 #define DYTC_FUNCTION_MMC     11 /* Function = 11, MMC mode */
 #define DYTC_FUNCTION_PSC     13 /* Function = 13, PSC mode */
 #define DYTC_FUNCTION_AMT     15 /* Function = 15, AMT mode */
@@ -10163,11 +10165,14 @@ static struct ibm_struct proxsensor_driver_data = {
 #define DYTC_MODE_MMC_LOWPOWER 3  /* Low power mode */
 #define DYTC_MODE_MMC_BALANCE  0xF  /* Default mode aka balanced */
 #define DYTC_MODE_MMC_DEFAULT  0  /* Default mode from MMC_GET, aka balanced */
+#define DYTC_NOMODE            0xF  /* When Function does not have a mode */
 
 #define DYTC_MODE_PSC_LOWPOWER 3  /* Low power mode */
 #define DYTC_MODE_PSC_BALANCE  5  /* Default mode aka balanced */
 #define DYTC_MODE_PSC_PERFORM  7  /* High power mode aka performance */
 
+#define DYTC_UP_SUPPORT_BIT    8  /* Bit 8 - 1 = supported, 0 = not */
+
 #define DYTC_ERR_MASK       0xF  /* Bits 0-3 in cmd result are the error result */
 #define DYTC_ERR_SUCCESS      1  /* CMD completed successful */
 
@@ -10185,6 +10190,7 @@ static enum platform_profile_option dytc_current_profile;
 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
 static DEFINE_MUTEX(dytc_mutex);
 static int dytc_capabilities;
+static bool dytc_ultraperf_cap; /* ultra performance capable */
 static bool dytc_mmc_get_available;
 static int profile_force;
 
@@ -10355,6 +10361,17 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
 	if (err)
 		goto unlock;
 
+	/* Set TMS mode appropriately (enable for performance), if available */
+	if (dytc_ultraperf_cap) {
+		int cmd;
+
+		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_TMS, DYTC_NOMODE,
+				       profile == PLATFORM_PROFILE_PERFORMANCE);
+		err = dytc_command(cmd, &output);
+		if (err)
+			return err;
+	}
+
 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
 		if (profile == PLATFORM_PROFILE_BALANCED) {
 			/*
@@ -10429,6 +10446,7 @@ static struct platform_profile_handler dytc_profile = {
 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 {
 	int err, output;
+	int cmd;
 
 	/* Setup supported modes */
 	set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
@@ -10484,6 +10502,16 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 		dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
 		return -ENODEV;
 	}
+	err = dytc_command(DYTC_CMD_UP_CAP, &output);
+	dytc_ultraperf_cap = output & BIT(DYTC_UP_SUPPORT_BIT) ? true : false;
+	if (dytc_ultraperf_cap) {
+		pr_debug("TMS is supported\n");
+		/* Disable TMS by default - only use with performance mode */
+		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_TMS, DYTC_NOMODE, 0);
+		err = dytc_command(cmd, &output);
+		if (err)
+			return err;
+	}
 
 	dbg_printk(TPACPI_DBG_INIT,
 			"DYTC version %d: thermal mode available\n", dytc_version);
-- 
2.41.0