From: Robert Foss <robert.foss@xxxxxxxxxxxxx>
Added function pipe_id_to_vbl_flag() to igt_kms.
This function formats a pipe_id into the format
expected by DRM while processing DRM_IOCTL_WAIT_VBLANK.
Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxxxxx>
---
lib/igt_kms.c | 16 ++++++++++++++++
lib/igt_kms.h | 1 +
2 files changed, 17 insertions(+)
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 99b6279..48b95e6 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -2557,3 +2557,19 @@ void igt_reset_connectors(void)
close(fd);
}
}
+
+/**
+ * pipe_id_to_vbl_flag:
+ *
+ * Convert a pipe if into the flag representation
+ * expected in DRM while processing DRM_IOCTL_WAIT_VBLANK.
+ */
+uint32_t pipe_id_to_vbl_flag(uint32_t pipe_id)
+{
+ if (pipe_id == 0)
+ return 0;
+ else if (pipe_id == 1)
+ return 1 | _DRM_VBLANK_SECONDARY;
+ else
+ return pipe_id << 1;
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index d9a4e11..f74edaf 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -400,6 +400,7 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
void igt_enable_connectors(void);
void igt_reset_connectors(void);
+uint32_t pipe_id_to_vbl_flag(uint32_t pipe_id);
#define EDID_LENGTH 128
const unsigned char* igt_kms_get_base_edid(void);
--
2.5.0
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