[PATCH i-g-t v3 07/11] lib/igt_kms: Add support for the OUT_FENCE_PTR property

[Robert Foss <robert.foss@collabora.com>]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

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>
---
 lib/igt_kms.c | 26 +++++++++++++++++++++++++-
 lib/igt_kms.h |  6 +++++-
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index b79d2867..f14496dd 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] = {
@@ -2393,6 +2394,15 @@ 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 = -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);
+		igt_assert_f(pipe_obj->out_fence != -1, "Unable to get fence, received -1 fd\n");
+	}
+
 	/*
 	 *	TODO: Add all crtc level properties here
 	 */
@@ -2984,6 +2994,20 @@ igt_pipe_set_gamma_lut(igt_pipe_t *pipe, void *ptr, size_t length)
 }
 
 /**
+ * igt_pipe_set_out_fence_ptr:
+ * @pipe: pipe pointer to which background color to be set
+ * @fence_ptr: out fence pointer
+ *
+ * Sets the out fence pointer that will be passed to the kernel in
+ * the atomic ioctl. When the kernel returns the out fence pointer
+ * will contain the fd number of the out fence created by KMS.
+ */
+void igt_pipe_set_out_fence_ptr(igt_pipe_t *pipe, int64_t *fence_ptr)
+{
+	pipe->out_fence_ptr = fence_ptr;
+}
+
+/**
  * igt_crtc_set_background:
  * @pipe: pipe pointer to which background color to be set
  * @background: background color value in BGR 16bpc
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 85688853..9672dadc 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;
+
+	int64_t out_fence;
+	bool out_fence_requested;
 };
 
 typedef struct {
@@ -395,7 +399,7 @@ 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);
-- 
2.11.0.453.g787f75f05

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