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ACPI: x86: Add pm_debug_messages for LPS0 _DSM state tracking

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Enabling debugging messages for the state requires turning on dynamic
debugging for the file. To make it more accessible, use
`pm_debug_messages` and clearer strings for what is happening.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mario Limonciello 2023-06-02 02:30:23 -05:00 committed by Rafael J. Wysocki
parent cdb8c100d8
commit f75400603f
1 changed files with 46 additions and 6 deletions
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52
drivers/acpi/x86/s2idle.c
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@ -59,6 +59,7 @@ static int lps0_dsm_func_mask;
static guid_t lps0_dsm_guid_microsoft;
static int lps0_dsm_func_mask_microsoft;
static int lps0_dsm_state;
/* Device constraint entry structure */
struct lpi_device_info {
@ -320,6 +321,44 @@ static void lpi_check_constraints(void)
}
}
static bool acpi_s2idle_vendor_amd(void)
{
return boot_cpu_data.x86_vendor == X86_VENDOR_AMD;
}
static const char *acpi_sleep_dsm_state_to_str(unsigned int state)
{
if (lps0_dsm_func_mask_microsoft || !acpi_s2idle_vendor_amd()) {
switch (state) {
case ACPI_LPS0_SCREEN_OFF:
return "screen off";
case ACPI_LPS0_SCREEN_ON:
return "screen on";
case ACPI_LPS0_ENTRY:
return "lps0 entry";
case ACPI_LPS0_EXIT:
return "lps0 exit";
case ACPI_LPS0_MS_ENTRY:
return "lps0 ms entry";
case ACPI_LPS0_MS_EXIT:
return "lps0 ms exit";
}
} else {
switch (state) {
case ACPI_LPS0_SCREEN_ON_AMD:
return "screen on";
case ACPI_LPS0_SCREEN_OFF_AMD:
return "screen off";
case ACPI_LPS0_ENTRY_AMD:
return "lps0 entry";
case ACPI_LPS0_EXIT_AMD:
return "lps0 exit";
}
}
return "unknown";
}
static void acpi_sleep_run_lps0_dsm(unsigned int func, unsigned int func_mask, guid_t dsm_guid)
{
union acpi_object *out_obj;
@ -331,14 +370,15 @@ static void acpi_sleep_run_lps0_dsm(unsigned int func, unsigned int func_mask, g
rev_id, func, NULL);
ACPI_FREE(out_obj);
acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n",
func, out_obj ? "successful" : "failed");
lps0_dsm_state = func;
if (pm_debug_messages_on) {
acpi_handle_info(lps0_device_handle,
"%s transitioned to state %s\n",
out_obj ? "Successfully" : "Failed to",
acpi_sleep_dsm_state_to_str(lps0_dsm_state));
}
}
static bool acpi_s2idle_vendor_amd(void)
{
return boot_cpu_data.x86_vendor == X86_VENDOR_AMD;
}
static int validate_dsm(acpi_handle handle, const char *uuid, int rev, guid_t *dsm_guid)
{