[igt-dev] [PATCH v2 1/1] tests/kms_cursor_legacy: Skip 2x-cursor-vs-flip subtests for gen > 9

[Neel Desai]

Due to DDB allocation changes, we have to add all the planes to the
drm_atomic_state post gen 9. When the watermarks are computed by the
kernel, the cursor plane is added to the drm_atomic_state which
introduces a dependency on hw_done object when the kernel processes
DRM_IOCTL_MODE_ATOMIC and DRM_IOCTL_MODE_CURSOR in parallel. There is no
race-free way to handle this corner case. These subtests made sense for
older generations but not anymore. Hence, skipping these sub-tests post
gen 9.

Reference: https://bugs.freedesktop.org/show_bug.cgi?id=109079
Signed-off-by: Neel Desai <neel.desai at intel.com>
cc: Sudeep Dutt <sudeep.dutt at intel.com>
cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 tests/kms_cursor_legacy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/kms_cursor_legacy.c b/tests/kms_cursor_legacy.c
index d6987eea..645c0b93 100644
--- a/tests/kms_cursor_legacy.c
+++ b/tests/kms_cursor_legacy.c
@@ -1115,6 +1115,7 @@ static void cursor_vs_flip(igt_display_t *display, enum flip_test mode, int nloo

 static void two_screens_cursor_vs_flip(igt_display_t *display, int nloops, bool atomic)
 {
+	const int gen = intel_gen(intel_get_drm_devid(display->drm_fd));
 	struct drm_mode_cursor arg[2][2];
 	struct drm_event_vblank vbl;
 	struct igt_fb fb_info[2], cursor_fb;
@@ -1126,6 +1127,8 @@ static void two_screens_cursor_vs_flip(igt_display_t *display, int nloops, bool
 	};
 	igt_output_t *outputs[2];

+	igt_require(gen <= 9);
+
 	shared = mmap(NULL, PAGE_SIZE, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
 	igt_assert(shared != MAP_FAILED);

--
2.17.1