[Intel-gfx] [PATCH i-g-t 1/2] igt_kms: Set atomic capability bit

[Matt Roper]

Tell the kernel that we understand atomic and want to have access to
atomic-only properties.  If the kernel doesn't support atomic for i915
yet (and i915.nuclear_pageflip=1 isn't passed on the kernel command
line) this will silently fail, but won't cause any problems.

We wrap this in an #ifdef to allow compilation on pre-atomic libdrm
versions as well.

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 lib/igt_kms.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 51d735d..53bfc20 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -984,6 +984,9 @@ void igt_display_init(igt_display_t *display, int drm_fd)
 	display->n_pipes = resources->count_crtcs;
 
 	drmSetClientCap(drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+#ifdef DRM_CLIENT_CAP_ATOMIC
+	drmSetClientCap(drm_fd, DRM_CLIENT_CAP_ATOMIC, 1);
+#endif
 	plane_resources = drmModeGetPlaneResources(display->drm_fd);
 	igt_assert(plane_resources);
 
-- 
2.1.4