Some AMD Thinkpads support automatic mode transitions. The actual
transition logic doesn't live in the `thinkpad_acpi` driver. The events
to activate this logic come from this driver though.
Populate these events when switching PSC power modes.
Co-developed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Mark Pearson <markpearson@xxxxxxxxxx>
---
drivers/platform/x86/thinkpad_acpi.c | 34 ++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 5d1e0a3a5c1e..2df290cee0a1 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10266,6 +10266,7 @@ static struct ibm_struct proxsensor_driver_data = {
#define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */
#define DYTC_FC_MMC 27 /* MMC Mode supported */
#define DYTC_FC_PSC 29 /* PSC Mode supported */
+#define DYTC_FC_AMT 31 /* AMT mode supported */
#define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
#define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
@@ -10278,6 +10279,10 @@ static struct ibm_struct proxsensor_driver_data = {
#define DYTC_FUNCTION_CQL 1 /* Function = 1, lap 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 */
+
+#define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */
+#define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */
#define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */
#define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */
@@ -10298,6 +10303,8 @@ static struct ibm_struct proxsensor_driver_data = {
#define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
#define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
+static int dytc_control_amt(bool enable);
+static bool dytc_amt_active;
static enum platform_profile_option dytc_current_profile;
static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
@@ -10380,6 +10387,30 @@ static int dytc_profile_get(struct platform_profile_handler *pprof,
return 0;
}
+static int dytc_control_amt(bool enable)
+{
+ int dummy;
+ int err;
+ int cmd;
+
+ if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
+ pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
+ return -ENODEV;
+ }
+
+ if (enable)
+ cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
+ else
+ cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
+
+ pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
+ err = dytc_command(cmd, &dummy);
+ if (err)
+ return err;
+ dytc_amt_active = enable;
+ return 0;
+}
+
/*
* Helper function - check if we are in CQL mode and if we are
* - disable CQL,
@@ -10462,6 +10493,9 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
if (err)
goto unlock;
+ /* system supports AMT, activate it when on balanced */
+ if (dytc_capabilities & BIT(DYTC_FC_AMT))
+ dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
}
/* Success - update current profile */
dytc_current_profile = profile;
--
2.36.1
