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authorEric Anholt <eric@anholt.net>2008-03-04 13:45:41 -0800
committerEric Anholt <eric@anholt.net>2008-03-04 13:45:41 -0800
commita6a2f2c8c491617de702dc7d62bb55cbada4d42b (patch)
tree3ca9cbaf7d0d1a7795c28685bcebfa347f8ed2ae
parent3332a0add63162222bd9c829117cd7e30d981aa7 (diff)
Clarify when WAIT_LAZY is relevant to users.
-rw-r--r--shared-core/drm.h20
1 files changed, 13 insertions, 7 deletions
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 213d3c7a..663696c1 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -645,6 +645,13 @@ struct drm_set_version {
#define DRM_FENCE_FLAG_EMIT 0x00000001
#define DRM_FENCE_FLAG_SHAREABLE 0x00000002
+/**
+ * On hardware with no interrupt events for operation completion,
+ * indicates that the kernel should sleep while waiting for any blocking
+ * operation to complete rather than spinning.
+ *
+ * Has no effect otherwise.
+ */
#define DRM_FENCE_FLAG_WAIT_LAZY 0x00000004
#define DRM_FENCE_FLAG_NO_USER 0x00000010
@@ -794,13 +801,12 @@ struct drm_fence_arg {
* with it as a result of this operation
*/
#define DRM_BO_HINT_DONT_FENCE 0x00000004
-/*
- * Sleep while waiting for the operation to complete.
- * Without this flag, the kernel will, instead, spin
- * until this operation has completed. I'm not sure
- * why you would ever want this, so please always
- * provide DRM_BO_HINT_WAIT_LAZY to any operation
- * which may block
+/**
+ * On hardware with no interrupt events for operation completion,
+ * indicates that the kernel should sleep while waiting for any blocking
+ * operation to complete rather than spinning.
+ *
+ * Has no effect otherwise.
*/
#define DRM_BO_HINT_WAIT_LAZY 0x00000008
/*