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The test initializes the switch library and queries > the active port to confirm communication works. > > This enables CI to detect when USB4 switch hardware is available > before running the full kms_usb4_switch test suite. > > Signed-off-by: Kunal Joshi Looks good to me Reviewed-by: Arun R Murthy Thanks and Regards, Arun R Murthy -------------------- > --- > tests/kms_feature_discovery.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/tests/kms_feature_discovery.c b/tests/kms_feature_discovery.c > index f0216a4ce..b05055186 100644 > --- a/tests/kms_feature_discovery.c > +++ b/tests/kms_feature_discovery.c > @@ -40,6 +40,7 @@ > #include "igt_psr.h" > #include "igt_sysfs.h" > #include "igt_types.h" > +#include "igt_usb4_switch.h" > > /** > * SUBTEST: display > @@ -63,6 +64,9 @@ > * SUBTEST: dp-mst > * Description: Make sure that we have DP-MST configuration. > * > + * SUBTEST: usb4-switch > + * Description: Verify that USB4 Switch 3141 is available and responding. > + * > * arg[1].values: 1, 2, 3, 4 > */ > > @@ -147,6 +151,25 @@ int igt_main() { > } > #endif > > + igt_describe("Verify that USB4 Switch 3141 is available and responding."); > + igt_subtest("usb4-switch") { > + struct usb4switch *sw; > + int port; > + > + sw = usb4switch_init(fd); > + igt_require_f(sw, > + "USB4 Switch 3141 not available\n"); > + > + /* Verify communication works by querying active port */ > + port = usb4switch_get_active_port(sw); > + igt_assert_f(port >= 0, > + "Cannot communicate with USB4 switch\n"); > + > + igt_info("USB4 Switch 3141 available (active port: %d)\n", > + port); > + usb4switch_deinit(sw); > + } > + > igt_describe("Make sure that we have eDP panel with PSR1 support."); > igt_subtest("psr1") { > igt_require(psr_sink_support(fd, debugfs_fd, PSR_MODE_1, NULL));