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platform/x86: thinkpad-acpi: Add support for automatic mode transitions

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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@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Link: https://lore.kernel.org/r/20220603170212.164963-2-markpearson@lenovo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Mark Pearson 2022-06-03 13:02:10 -04:00 committed by Hans de Goede
parent 6fe391dd5d
commit 46dcbc61b7
1 changed files with 34 additions and 0 deletions
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34
drivers/platform/x86/thinkpad_acpi.c
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@ -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;