lib: extract kmstest_get_pipe_from_crtc_id

2 files changed, 14 insertions, 0 deletions

diff --git a/lib/drmtest.c b/lib/drmtest.c
index e55f63ad..8518bde5 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -916,3 +916,16 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
 	fflush(stdout);
 }
 
+int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
+{
+	struct drm_i915_get_pipe_from_crtc_id pfci;
+	int ret;
+
+	memset(&pfci, 0, sizeof(pfci));
+	pfci.crtc_id = crtc_id;
+	ret = drmIoctl(fd, DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID, &pfci);
+	assert(ret == 0);
+
+	return pfci.pipe;
+}
+
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 796fa837..2000b70b 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -110,6 +110,7 @@ unsigned int kmstest_create_fb(int fd, int width, int height, int bpp,
 			       void *func_arg);
 void kmstest_remove_fb(int fd, int fb_id);
 void kmstest_dump_mode(drmModeModeInfo *mode);
+int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
 
 inline static void _do_or_die(const char *function, int line, int ret)
 {