diff options
author | Anshuman Gupta <anshuman.gupta@intel.com> | 2023-06-28 12:17:20 +0530 |
---|---|---|
committer | Anshuman Gupta <anshuman.gupta@intel.com> | 2023-06-30 16:06:31 +0530 |
commit | 119805f652f299d3992fab0a22f32a7b0ea76619 (patch) | |
tree | c114b06364256098055205badb4cc2d9535f0c84 /lib/igt_aux.c | |
parent | 1b08bb7f02d8abeef36026c5e7c7c8b478ac2479 (diff) |
lib/igt_aux: Enable PM Suspend dbg messages
Enabling PM Suspend dbg messages by turning on
/sys/power/pm_debug_messages switch also adding an
exit handler provision to restore the
pm_debug_messages state.
v2:
- Fixed sysfs_fd leak. [Badal]
v3:
- Added igt_aux_enable_pm_suspend_dbg() function doc. [Kmail]
v4:
- Fixed some nits. [Ashutosh]
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Diffstat (limited to 'lib/igt_aux.c')
-rw-r--r-- | lib/igt_aux.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/lib/igt_aux.c b/lib/igt_aux.c index dca559384..fd5103043 100644 --- a/lib/igt_aux.c +++ b/lib/igt_aux.c @@ -703,6 +703,7 @@ void igt_print_activity(void) static int autoresume_delay; bool __console_suspend_saved_state; +bool __pm_debug_messages_state; #define SYSFS_MODULE_PRINTK "/sys/module/printk/parameters/" #define CONSOLE_SUSPEND_DISABLE false @@ -913,7 +914,7 @@ static bool is_mem_sleep_state_supported(int power_dir, enum igt_mem_sleep state static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig) { - int sysfs_fd; + int sysfs_fd, power_dir; sysfs_fd = open(SYSFS_MODULE_PRINTK, O_RDONLY); if (sysfs_fd < 0) @@ -921,17 +922,30 @@ static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig) igt_sysfs_set_boolean(sysfs_fd, "console_suspend", __console_suspend_saved_state); close(sysfs_fd); + + power_dir = open("/sys/power", O_RDONLY); + if (power_dir < 0) + return; + + if (!faccessat(power_dir, "pm_debug_messages", R_OK | W_OK, 0)) + igt_sysfs_set_boolean(power_dir, "pm_debug_messages", __pm_debug_messages_state); + + close(power_dir); } /** * igt_aux_enable_pm_suspend_dbg: + * @power_dir: /sys/power/ dir fd * * Enhance the System wide suspend/resume debugging by - * disabling console suspend. Disabling console suspend dump the suspend/resume - * logs over serial console. That will be useful to debug CI Suspend/Resume issues - * tagged with 'Incomplete' result. + * disabling console suspend and enabling PM debug messages. + * Disabling console suspend dump the suspend/resume logs over serial console. + * That will be useful to debug CI Suspend/Resume issues tagged + * with 'Incomplete' result. + * pm_debug_messages sysfs enables Linux PM Core debug messages, which will + * be useful to debug system wide suspend/resume related issues. */ -static void igt_aux_enable_pm_suspend_dbg(void) +static void igt_aux_enable_pm_suspend_dbg(int power_dir) { int sysfs_fd; @@ -942,11 +956,18 @@ static void igt_aux_enable_pm_suspend_dbg(void) if (!igt_sysfs_set_boolean(sysfs_fd, "console_suspend", CONSOLE_SUSPEND_DISABLE)) igt_warn("Unable to disable console suspend\n"); - igt_install_exit_handler(igt_aux_pm_suspend_dbg_restore_exit_handler); } else { igt_warn("Unable to open printk parameters Err:%d\n", errno); } + /* pm_debug_messages depends on CONFIG_PM_SLEEP_DEBUG */ + if (!faccessat(power_dir, "pm_debug_messages", R_OK | W_OK, 0)) { + __pm_debug_messages_state = igt_sysfs_get_boolean(sysfs_fd, "pm_debug_messages"); + igt_sysfs_set_boolean(power_dir, "pm_debug_messages", true); + } + + igt_install_exit_handler(igt_aux_pm_suspend_dbg_restore_exit_handler); + close(sysfs_fd); } @@ -988,7 +1009,7 @@ void igt_system_suspend_autoresume(enum igt_suspend_state state, "Suspend to disk requires swap space.\n"); orig_test = get_suspend_test(power_dir); - igt_aux_enable_pm_suspend_dbg(); + igt_aux_enable_pm_suspend_dbg(power_dir); if (state == SUSPEND_STATE_S3) { orig_mem_sleep = get_mem_sleep(); |