[PATCH i-g-t v1 05/25] lib/igt_kms: Add function to get valid pipe for specific output

[Mohammed Bilal <mohammed.bilal@intel.com>]

From: Louis Chauvet <louis.chauvet@bootlin.com>

Introduces a new function igt_get_pipe_for_output in igt_kms. The function
is designed to retrieve a valid pipe for a specific output in a display.

Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
---
 lib/igt_kms.c | 22 ++++++++++++++++++++++
 lib/igt_kms.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index aa086e96c..73d65f70a 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -8426,3 +8426,25 @@ uint32_t igt_get_connector_id_from_mst_path(int drm_fd, const void *mst_path)
 
 	return 0;
 }
+
+/**
+ * igt_get_pipe_for_output:
+ * @display: display to fetch the pipes
+ * @output: output to use
+ *
+ * Get a valid pipe for a specific output. The return value is the pipe first valid pipe for a
+ * specific output.
+ */
+enum pipe igt_get_pipe_for_output(igt_display_t *display,
+				  igt_output_t *output)
+{
+        igt_crtc_t *crtc;
+
+        for_each_crtc(display, crtc) {
+                if (igt_output_is_connected(output) &&
+                     (output->config.valid_crtc_index_mask & (1 << crtc->crtc_index)))
+                        return crtc->pipe;
+        }
+
+        return PIPE_NONE;
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index bc921f4ff..70b7d1a58 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -1305,5 +1305,6 @@ int igt_get_connected_connectors(int drm_fd, uint32_t **connector_ids);
 drmModeConnectorPtr igt_get_connector_from_name(int drm_fd, const char *port_name);
 uint32_t igt_get_connector_id_from_name(int drm_fd, const char *port_name);
 uint32_t igt_get_connector_id_from_mst_path(int drm_fd, const void *mst_path);
+enum pipe igt_get_pipe_for_output(igt_display_t *display, igt_output_t *output);
 
 #endif /* __IGT_KMS_H__ */
-- 
2.48.1