[PATCH i-g-t 05/19] lib/kms: Introduce igt_first_crtc_with_single_output()

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Several tests just want to find a single CRTC with an output.
Add a new helper (igt_first_crtc_with_single_output() for it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 lib/igt_kms.c | 15 +++++++++++++++
 lib/igt_kms.h |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index bec96f2677ad..ee95afc49aa7 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -7964,3 +7964,18 @@ igt_crtc_t *igt_crtc_for_crtc_id(igt_display_t *display, uint32_t crtc_id)
 
 	return NULL;
 }
+
+igt_crtc_t *igt_first_crtc_with_single_output(igt_display_t *display, igt_output_t **ret_output)
+{
+	igt_output_t *output;
+	igt_crtc_t *crtc;
+
+	for_each_crtc_with_single_output(display, crtc, output) {
+		*ret_output = output;
+		return crtc;
+	}
+
+	*ret_output = NULL;
+
+	return NULL;
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 5a2dd87b509f..ae488bbf4806 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -575,6 +575,8 @@ int igt_display_n_crtcs(igt_display_t *display);
 
 const char *igt_crtc_name(igt_crtc_t *crtc);
 
+igt_crtc_t *igt_first_crtc_with_single_output(igt_display_t *display, igt_output_t **ret_output);
+
 static inline igt_crtc_t *igt_crtc_for_pipe(igt_display_t *display, enum pipe pipe)
 {
 	if (pipe == PIPE_NONE)
-- 
2.52.0