[PATCH i-g-t v8] tests/intel/xe_pm: Fix d3 subtest

[Mohammed Thasleem]

xe_pm d3 test requires to turn off all display in order to
enter to d3 state therefore, adding the support to triggering
"DRM_MODE_DPMS_OFF" in setup_d3() and "DRM_MODE_DPMS_ON" in
cleanup_d3().

v2: Use IGT_CRTC_ACTIVE for displays On/Off.
v3: -Update commit message and helper names.
    -Update display on and off helpers.
v4: Remove redundant code. (Bhanu)
v5: Move helper calls to test file.
v6: -Update function name as dpms_on_off. (Anshuman)
    -Update subject and commit message. (Kamil)
v7: -Update subjact. (Anshuman)
    -Move device.res to dpms_on_off(). (Bhanu)
    -Free device.res in igt_fixture. (Bhanu)
    -Call kmstest_set_connector_dpms if DRM_MODE_CONNECTED is found. (Kamil)
v8: Update if condition to fix dereferencing of NULL pointer. (Bhanu)

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
Signed-off-by: Mohammed Thasleem <mohammed.thasleem at intel.com>
---
 tests/intel/xe_pm.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tests/intel/xe_pm.c b/tests/intel/xe_pm.c
index c899bd67a..3d6acfbab 100644
--- a/tests/intel/xe_pm.c
+++ b/tests/intel/xe_pm.c
@@ -16,6 +16,7 @@
 
 #include "igt.h"
 #include "lib/igt_device.h"
+#include "lib/igt_kms.h"
 #include "lib/igt_pm.h"
 #include "lib/igt_sysfs.h"
 #include "lib/igt_syncobj.h"
@@ -36,10 +37,32 @@ typedef struct {
 	struct pci_device *pci_xe;
 	struct pci_device *pci_root;
 	char pci_slot_name[NAME_MAX];
+	drmModeResPtr res;
 } device_t;
 
 uint64_t orig_threshold;
 
+static void dpms_on_off(device_t device, int mode)
+{
+	int i;
+
+	if (!device.res)
+		return;
+
+	for (i = 0; i < device.res->count_connectors; i++) {
+		drmModeConnector *connector = drmModeGetConnectorCurrent(device.fd_xe,
+					      device.res->connectors[i]);
+
+		if (!connector)
+			continue;
+
+		if (connector->connection == DRM_MODE_CONNECTED)
+			kmstest_set_connector_dpms(device.fd_xe, connector, mode);
+
+		drmModeFreeConnector(connector);
+	}
+}
+
 /* runtime_usage is only available if kernel build CONFIG_PM_ADVANCED_DEBUG */
 static bool runtime_usage_available(struct pci_device *pci)
 {
@@ -94,6 +117,8 @@ static void vram_d3cold_threshold_restore(int sig)
 
 static bool setup_d3(device_t device, enum igt_acpi_d_state state)
 {
+	dpms_on_off(device, DRM_MODE_DPMS_OFF);
+
 	switch (state) {
 	case IGT_ACPI_D3Cold:
 		igt_require(igt_pm_acpi_d3cold_supported(device.pci_root));
@@ -110,6 +135,11 @@ static bool setup_d3(device_t device, enum igt_acpi_d_state state)
 	return false;
 }
 
+static void cleanup_d3(device_t device)
+{
+	dpms_on_off(device, DRM_MODE_DPMS_ON);
+}
+
 static bool in_d3(device_t device, enum igt_acpi_d_state state)
 {
 	uint16_t val;
@@ -477,6 +507,7 @@ igt_main
 		igt_pm_get_d3cold_allowed(device.pci_slot_name, &d3cold_allowed);
 		igt_assert(igt_setup_runtime_pm(device.fd_xe));
 		sysfs_fd = igt_sysfs_open(device.fd_xe);
+		device.res = drmModeGetResources(device.fd_xe);
 	}
 
 	for (const struct s_state *s = s_states; s->name; s++) {
@@ -511,6 +542,7 @@ igt_main
 				xe_for_each_engine(device.fd_xe, hwe)
 					test_exec(device, hwe, 1, 2, s->state,
 						  NO_RPM);
+				cleanup_d3(device);
 			}
 		}
 	}
@@ -519,6 +551,7 @@ igt_main
 		igt_subtest_f("%s-basic", d->name) {
 			igt_assert(setup_d3(device, d->state));
 			igt_assert(in_d3(device, d->state));
+			cleanup_d3(device);
 		}
 
 		igt_subtest_f("%s-basic-exec", d->name) {
@@ -526,6 +559,7 @@ igt_main
 			xe_for_each_engine(device.fd_xe, hwe)
 				test_exec(device, hwe, 1, 1,
 					  NO_SUSPEND, d->state);
+			cleanup_d3(device);
 		}
 
 		igt_subtest_f("%s-multiple-execs", d->name) {
@@ -533,6 +567,7 @@ igt_main
 			xe_for_each_engine(device.fd_xe, hwe)
 				test_exec(device, hwe, 16, 32,
 					  NO_SUSPEND, d->state);
+			cleanup_d3(device);
 		}
 	}
 
@@ -547,6 +582,7 @@ igt_main
 		close(sysfs_fd);
 		igt_pm_set_d3cold_allowed(device.pci_slot_name, d3cold_allowed);
 		igt_restore_runtime_pm();
+		drmModeFreeResources(device.res);
 		drm_close_driver(device.fd_xe);
 	}
 }
-- 
2.25.1