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authorMario Limonciello <mario.limonciello@amd.com>2023-06-02 10:30:23 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-06-12 20:56:08 +0300
commitf75400603f5fb7a031218c659852809378a77cb7 (patch)
tree028378a99cfe413886965210e91f547bfe19f5ff /drivers/acpi
parentcdb8c100d8a4b4e31c829724e40b4fdf32977cce (diff)
downloadlinux-f75400603f5fb7a031218c659852809378a77cb7.tar.xz
ACPI: x86: Add pm_debug_messages for LPS0 _DSM state tracking
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/x86/s2idle.c52
1 files changed, 46 insertions, 6 deletions
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index e499c60c4579..7681f6ecab67 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -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)
{