diff mbox series

[2/4] ACPI: x86: Add pm_debug_messages for LPS0 _DSM state tracking

Message ID 20230518172752.93322-3-mario.limonciello@amd.com
State New
Headers show
Series Add consumers for pm_pr_debug() outside of pm | expand

Commit Message

Mario Limonciello May 18, 2023, 5:27 p.m. UTC 
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>
---
 drivers/acpi/x86/s2idle.c | 52 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 6 deletions(-)

Comments

kernel test robot May 19, 2023, 7:16 a.m. UTC | #1 
Hi Mario,

kernel test robot noticed the following build warnings:

[auto build test WARNING on dac0c6388ff86af74dc6f4dd6e90a7db5a429e3d]

url:    https://github.com/intel-lab-lkp/linux/commits/Mario-Limonciello/include-linux-suspend-h-Only-show-pm_pr_dbg-messages-at-suspend-resume/20230519-013031
base:   dac0c6388ff86af74dc6f4dd6e90a7db5a429e3d
patch link:    https://lore.kernel.org/r/20230518172752.93322-3-mario.limonciello%40amd.com
patch subject: [PATCH 2/4] ACPI: x86: Add pm_debug_messages for LPS0 _DSM state tracking
config: x86_64-randconfig-c022 (https://download.01.org/0day-ci/archive/20230519/202305191405.u2HzFqxM-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305191405.u2HzFqxM-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> drivers/acpi/x86/s2idle.c:345:3-4: Unneeded semicolon
diff mbox series

Patch

diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index e499c60c4579..94f4f31ff1ce 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)
 {