From: Imre Deak <imre.deak@xxxxxxxxx> Add a helper to query the supported and currently selected suspend-to-mem modes. v2: - Fix for old kernels where the mem_sleep sysfs file didn't yet exist. Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> --- lib/igt_aux.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_aux.h | 24 +++++++++++++++ 2 files changed, 105 insertions(+) diff --git a/lib/igt_aux.c b/lib/igt_aux.c index 578f8579..f2cb3247 100644 --- a/lib/igt_aux.c +++ b/lib/igt_aux.c @@ -827,6 +827,87 @@ static uint32_t get_supported_suspend_states(int power_dir) return state_mask; } +static const char *suspend_to_mem_mode_name[] = { + [SUSPEND_TO_MEM_S2IDLE] = "s2idle", + [SUSPEND_TO_MEM_SHALLOW] = "shallow", + [SUSPEND_TO_MEM_DEEP] = "deep", +}; + +static uint32_t +get_supported_suspend_to_mem_modes(int power_dir, + enum igt_suspend_to_mem_mode *selected_mode) +{ + char *modes; + char *mode_name; + uint32_t mode_mask; + bool selected_found = false; + + /* + * Other modes than deep sleep were only introduced with the mem_sleep + * sysfs file. + */ + modes = igt_sysfs_get(power_dir, "mem_sleep"); + if (!modes) { + *selected_mode = SUSPEND_TO_MEM_DEEP; + return 1 << SUSPEND_TO_MEM_DEEP; + } + + mode_mask = 0; + for (mode_name = strtok(modes, " "); mode_name; + mode_name = strtok(NULL, " ")) { + enum igt_suspend_to_mem_mode mode; + bool selected = false; + + if (mode_name[0] == '[') { + char *e = &mode_name[strlen(mode_name) - 1]; + + igt_assert(!selected_found); + igt_assert(*e == ']'); + mode_name++; + *e = '\0'; + + selected = true; + } + + for (mode = SUSPEND_TO_MEM_S2IDLE; + mode < SUSPEND_TO_MEM_NUM; + mode++) + if (strcmp(mode_name, + suspend_to_mem_mode_name[mode]) == 0) + break; + igt_assert(mode < SUSPEND_TO_MEM_NUM); + mode_mask |= 1 << mode; + if (selected) { + selected_found = true; + if (selected_mode) + *selected_mode = mode; + } + } + + igt_assert(selected_found); + + free(modes); + + return mode_mask; +} + +/** + * igt_get_suspend_to_mem_mode: + * + * Returns the currently selected @igt_suspend_to_mem_mode. + */ +enum igt_suspend_to_mem_mode igt_get_suspend_to_mem_mode(void) +{ + int power_dir; + enum igt_suspend_to_mem_mode mode; + + igt_require((power_dir = open("/sys/power", O_RDONLY)) >= 0); + (void)get_supported_suspend_to_mem_modes(power_dir, &mode); + close(power_dir); + + return mode; +} + /** * igt_system_suspend_autoresume: * @state: an #igt_suspend_state, the target suspend state diff --git a/lib/igt_aux.h b/lib/igt_aux.h index 04d22904..7ccaa8c4 100644 --- a/lib/igt_aux.h +++ b/lib/igt_aux.h @@ -184,10 +184,34 @@ enum igt_suspend_test { SUSPEND_TEST_NUM, }; +/** + * igt_suspend_to_mem_mode: + * @SUSPEND_TO_MEM_S2IDLE: suspend to mem maps to @SUSPEND_STATE_FREEZE + * @SUSPEND_TO_MEM_SHALLOW: suspend to mem maps to @SUSPEND_STATE_STANDBY + * @SUSPEND_TO_MEM_DEEP: suspend to mem will target the ACPI S3 state + * + * The target system state when suspending to mem: + * - Suspending with @SUSPEND_STATE_MEM/@SUSPEND_TO_MEM_S2IDLE is equivalent to + * suspending with @SUSPEND_STATE_FREEZE. + * - Suspending with @SUSPEND_STATE_MEM/@SUSPEND_TO_MEM_SHALLOW is equivalent to + * suspending with @SUSPEND_STATE_STANDBY. + * - Suspending with @SUSPEND_STATE_MEM/@SUSPEND_TO_MEM_DEEP will target the + * ACPI S3 state. + */ +enum igt_suspend_to_mem_mode { + SUSPEND_TO_MEM_S2IDLE, + SUSPEND_TO_MEM_SHALLOW, + SUSPEND_TO_MEM_DEEP, + + /*< private >*/ + SUSPEND_TO_MEM_NUM, +}; + void igt_system_suspend_autoresume(enum igt_suspend_state state, enum igt_suspend_test test); void igt_set_autoresume_delay(int delay_secs); int igt_get_autoresume_delay(enum igt_suspend_state state); +enum igt_suspend_to_mem_mode igt_get_suspend_to_mem_mode(void); /* dropping priviledges */ void igt_drop_root(void); -- 2.17.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx