[Intel-xe] [PATCH i-g-t] test/xe_pm: Assert on unbounded VSP

[Anshuman Gupta]

Discrete GFX cards gfx may have multiple PCIe endpoints,
they connects to root port via pcie upstream switch port(USP)
and virtual pcie switch port(VSP), sometimes VSP pcie devices
doesn't bind to pcieport driver. Without pcieport driver pcie PM
comes without any warranty and with unbounded VSP runtime pm and
system wide suspend/resume IGT test cases may get pass as false
positive.

Therefore assert the xe_pm igt tests on unbounded VSP.

Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 tests/xe/xe_pm.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/xe/xe_pm.c b/tests/xe/xe_pm.c
index 23b8246ed..78d9374cf 100644
--- a/tests/xe/xe_pm.c
+++ b/tests/xe/xe_pm.c
@@ -33,6 +33,7 @@
 typedef struct {
 	int fd_xe;
 	struct pci_device *pci_xe;
+	struct pci_device *pci_parent;
 	struct pci_device *pci_root;
 } device_t;
 
@@ -344,6 +345,7 @@ NULL));
 igt_main
 {
 	struct drm_xe_engine_class_instance *hwe;
+	struct drm_xe_query_config *config;
 	device_t device;
 	char d3cold_allowed[2];
 	const struct s_state {
@@ -369,8 +371,15 @@ igt_main
 		device.fd_xe = drm_open_driver(DRIVER_XE);
 		device.pci_xe = igt_device_get_pci_device(device.fd_xe);
 		device.pci_root = igt_device_get_pci_root_port(device.fd_xe);
+		device.pci_parent = pci_device_get_parent_bridge(device.pci_xe);
 
-		xe_device_get(device.fd_xe);
+		config = xe_device_get(device.fd_xe)->config;
+
+		if (config->info[XE_QUERY_CONFIG_FLAGS] & XE_QUERY_CONFIG_FLAGS_HAS_VRAM) {
+			igt_assert(device.pci_parent);
+			igt_assert_f(!pci_device_has_kernel_driver(device.pci_parent),
+				     "pci bridge device does not bind with pcieport driver\n");
+		}
 
 		/* Always perform initial once-basic exec checking for health */
 		xe_for_each_hw_engine(device.fd_xe, hwe)
-- 
2.25.1