Add support for DRM_MODE_PAGE_FLIP_TARGET_* flagsHEADmaster

4 files changed, 40 insertions, 4 deletions

diff --git a/include/drm/drm.h b/include/drm/drm.h
index b4ebaa96..3c5181d6 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -636,6 +636,7 @@ struct drm_gem_open {
 #define DRM_CAP_CURSOR_WIDTH		0x8
 #define DRM_CAP_CURSOR_HEIGHT		0x9
 #define DRM_CAP_ADDFB2_MODIFIERS	0x10
+#define DRM_CAP_PAGE_FLIP_TARGET	0x11
 
 /** DRM_IOCTL_GET_CAP ioctl argument type */
 struct drm_get_cap {
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index 7a7856e0..de44d0a9 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -514,7 +514,13 @@ struct drm_color_lut {
 
 #define DRM_MODE_PAGE_FLIP_EVENT 0x01
 #define DRM_MODE_PAGE_FLIP_ASYNC 0x02
-#define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT|DRM_MODE_PAGE_FLIP_ASYNC)
+#define DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
+#define DRM_MODE_PAGE_FLIP_TARGET_RELATIVE 0x8
+#define DRM_MODE_PAGE_FLIP_TARGET (DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE | \
+				   DRM_MODE_PAGE_FLIP_TARGET_RELATIVE)
+#define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT | \
+				  DRM_MODE_PAGE_FLIP_ASYNC | \
+				  DRM_MODE_PAGE_FLIP_TARGET)
 
 /*
  * Request a page flip on the specified crtc.
@@ -537,15 +543,25 @@ struct drm_color_lut {
  * 'as soon as possible', meaning that it not delay waiting for vblank.
  * This may cause tearing on the screen.
  *
- * The reserved field must be zero until we figure out something
- * clever to use it for.
+ * The sequence field must be zero unless either of the
+ * DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags is specified. When
+ * the ABSOLUTE flag is specified, the sequence field denotes the absolute
+ * vblank sequence when the flip should take effect. When the RELATIVE
+ * flag is specified, the sequence field denotes the relative (to the
+ * current one when the ioctl is called) vblank sequence when the flip
+ * should take effect. NOTE: DRM_IOCTL_WAIT_VBLANK must still be used to
+ * make sure the vblank sequence before the target one has passed before
+ * calling this ioctl. The purpose of the
+ * DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags is merely to clarify
+ * the target for when code dealing with a page flip runs during a
+ * vertical blank period.
  */
 
 struct drm_mode_crtc_page_flip {
 	__u32 crtc_id;
 	__u32 fb_id;
 	__u32 flags;
-	__u32 reserved;
+	__u32 sequence;
 	__u64 user_data;
 };
 
diff --git a/xf86drmMode.c b/xf86drmMode.c
index f7b59484..bba2f25b 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -935,6 +935,22 @@ int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
 }
 
+int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
+			  uint32_t flags, void *user_data,
+			  uint32_t target_vblank)
+{
+	struct drm_mode_crtc_page_flip flip;
+
+	memclear(flip);
+	flip.fb_id = fb_id;
+	flip.crtc_id = crtc_id;
+	flip.user_data = VOID2U64(user_data);
+	flip.flags = flags;
+	flip.sequence = target_vblank;
+
+	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
+}
+
 int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 		    uint32_t fb_id, uint32_t flags,
 		    int32_t crtc_x, int32_t crtc_y,
diff --git a/xf86drmMode.h b/xf86drmMode.h
index 4de7bbbe..27444346 100644
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -466,6 +466,9 @@ extern int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
 			       uint16_t *red, uint16_t *green, uint16_t *blue);
 extern int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 			   uint32_t flags, void *user_data);
+extern int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
+				 uint32_t flags, void *user_data,
+				 uint32_t target_vblank);
 
 extern drmModePlaneResPtr drmModeGetPlaneResources(int fd);
 extern drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id);