Implement drmGetCap() to query device/driver capabilities

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/xf86drm.c b/xf86drm.c
index 799fcddf..bc7a97fe 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -810,6 +810,18 @@ drmVersionPtr drmGetLibVersion(int fd)
     return (drmVersionPtr)version;
 }
 
+int drmGetCap(int fd, uint64_t capability, uint64_t *value)
+{
+	struct drm_get_cap cap = { capability, 0 };
+	int ret;
+
+	ret = drmIoctl(fd, DRM_IOCTL_GET_CAP, &cap);
+	if (ret)
+		return ret;
+
+	*value = cap.value;
+	return cap.value;
+}
 
 /**
  * Free the bus ID information.