lib/igt_kms: Add support for the OUT_FENCE_PTR property

Add support for the OUT_FENCE_PTR property to enable setting out fences for
atomic commits.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Brian Starkey <brian.starkey@arm.com>

2 files changed, 27 insertions, 2 deletions

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 9b60d74a..fbd08515 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -179,7 +179,8 @@ const char *igt_crtc_prop_names[IGT_NUM_CRTC_PROPS] = {
 	"DEGAMMA_LUT",
 	"GAMMA_LUT",
 	"MODE_ID",
-	"ACTIVE"
+	"ACTIVE",
+	"OUT_FENCE_PTR"
 };
 
 const char *igt_connector_prop_names[IGT_NUM_CONNECTOR_PROPS] = {
@@ -2385,6 +2386,14 @@ static void igt_atomic_prepare_crtc_commit(igt_pipe_t *pipe_obj, drmModeAtomicRe
 		igt_atomic_populate_crtc_req(req, pipe_obj, IGT_CRTC_ACTIVE, !!output);
 	}
 
+	pipe_obj->out_fence_fd = -1;
+	if (pipe_obj->out_fence_requested)
+	{
+		pipe_obj->out_fence_requested = false;
+		igt_atomic_populate_crtc_req(req, pipe_obj, IGT_CRTC_OUT_FENCE_PTR,
+		    (uint64_t)(uintptr_t) &pipe_obj->out_fence_fd);
+	}
+
 	/*
 	 *	TODO: Add all crtc level properties here
 	 */
@@ -2959,6 +2968,18 @@ void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
 	plane->rotation_changed = true;
 }
 
+/**
+ * igt_pipe_request_out_fence:
+ * @pipe: pipe which out fence will be requested for
+ *
+ * Marks this pipe for requesting an out fence at the next atomic commit
+ * will contain the fd number of the out fence created by KMS.
+ */
+void igt_pipe_request_out_fence(igt_pipe_t *pipe)
+{
+	pipe->out_fence_requested = true;
+}
+
 void
 igt_pipe_set_degamma_lut(igt_pipe_t *pipe, void *ptr, size_t length)
 {
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 8acad8ef..6754d00e 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -94,6 +94,7 @@ enum igt_atomic_crtc_properties {
        IGT_CRTC_GAMMA_LUT,
        IGT_CRTC_MODE_ID,
        IGT_CRTC_ACTIVE,
+       IGT_CRTC_OUT_FENCE_PTR,
        IGT_NUM_CRTC_PROPS
 };
 
@@ -341,6 +342,9 @@ struct igt_pipe {
 
 	uint64_t mode_blob;
 	bool mode_changed;
+
+	int32_t out_fence_fd;
+	bool out_fence_requested;
 };
 
 typedef struct {
@@ -394,7 +398,7 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
 {
 	return plane->rotation_property != 0;
 }
-
+void igt_pipe_request_out_fence(igt_pipe_t *pipe);
 void igt_pipe_set_degamma_lut(igt_pipe_t *pipe, void *ptr, size_t length);
 void igt_pipe_set_ctm_matrix(igt_pipe_t *pipe, void *ptr, size_t length);
 void igt_pipe_set_gamma_lut(igt_pipe_t *pipe, void *ptr, size_t length);