From: Michel Dänzer <michel.daen...@amd.com>

(Ported from radeon commit 1106b2f773ad0611c729b27f4c192a26b43ef1e7)

Signed-off-by: Michel Dänzer <michel.daen...@amd.com>
---
 src/amdgpu_dri2.c     |  3 +-
 src/amdgpu_kms.c      | 16 ++++-----
 src/amdgpu_present.c  |  5 +--
 src/amdgpu_probe.h    |  1 +
 src/drmmode_display.c | 99 +++++++++++++++++++++++++++++++++++++++++++++------
 src/drmmode_display.h | 11 +++++-
 6 files changed, 110 insertions(+), 25 deletions(-)

diff --git a/src/amdgpu_dri2.c b/src/amdgpu_dri2.c
index 31ac3f3..c3a112d 100644
--- a/src/amdgpu_dri2.c
+++ b/src/amdgpu_dri2.c
@@ -563,7 +563,8 @@ amdgpu_dri2_schedule_flip(xf86CrtcPtr crtc, ClientPtr 
client,
                               AMDGPU_DRM_QUEUE_ID_DEFAULT, flip_info,
                               ref_crtc_hw_id,
                               amdgpu_dri2_flip_event_handler,
-                              amdgpu_dri2_flip_event_abort, FLIP_VSYNC)) {
+                              amdgpu_dri2_flip_event_abort, FLIP_VSYNC,
+                              target_msc - amdgpu_get_msc_delta(draw, crtc))) {
                info->drmmode.dri2_flipping = TRUE;
                return TRUE;
        }
diff --git a/src/amdgpu_kms.c b/src/amdgpu_kms.c
index 319b572..09b7ea0 100644
--- a/src/amdgpu_kms.c
+++ b/src/amdgpu_kms.c
@@ -701,9 +701,8 @@ amdgpu_prime_scanout_flip(PixmapDirtyUpdatePtr ent)
                return;
        }
 
-       if (drmModePageFlip(pAMDGPUEnt->fd, drmmode_crtc->mode_crtc->crtc_id,
-                           drmmode_crtc->scanout[scanout_id].fb_id,
-                           DRM_MODE_PAGE_FLIP_EVENT, (void*)drm_queue_seq)) {
+       if (drmmode_page_flip_target_relative(pAMDGPUEnt, drmmode_crtc, 0,
+                                             drm_queue_seq, 0) != 0) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING, "flip queue failed in 
%s: %s\n",
                           __func__, strerror(errno));
                return;
@@ -949,8 +948,8 @@ amdgpu_scanout_flip(ScreenPtr pScreen, AMDGPUInfoPtr info,
                                        xf86CrtcPtr xf86_crtc)
 {
        drmmode_crtc_private_ptr drmmode_crtc = xf86_crtc->driver_private;
-       ScrnInfoPtr scrn;
-       AMDGPUEntPtr pAMDGPUEnt;
+       ScrnInfoPtr scrn = xf86_crtc->scrn;
+       AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(scrn);
        uintptr_t drm_queue_seq;
        unsigned scanout_id;
 
@@ -961,7 +960,6 @@ amdgpu_scanout_flip(ScreenPtr pScreen, AMDGPUInfoPtr info,
        if (!amdgpu_scanout_do_update(xf86_crtc, scanout_id))
                return;
 
-       scrn = xf86_crtc->scrn;
        drm_queue_seq = amdgpu_drm_queue_alloc(xf86_crtc,
                                               AMDGPU_DRM_QUEUE_CLIENT_DEFAULT,
                                               AMDGPU_DRM_QUEUE_ID_DEFAULT,
@@ -973,10 +971,8 @@ amdgpu_scanout_flip(ScreenPtr pScreen, AMDGPUInfoPtr info,
                return;
        }
 
-       pAMDGPUEnt = AMDGPUEntPriv(scrn);
-       if (drmModePageFlip(pAMDGPUEnt->fd, drmmode_crtc->mode_crtc->crtc_id,
-                           drmmode_crtc->scanout[scanout_id].fb_id,
-                           DRM_MODE_PAGE_FLIP_EVENT, (void*)drm_queue_seq)) {
+       if (drmmode_page_flip_target_relative(pAMDGPUEnt, drmmode_crtc, 0,
+                                             drm_queue_seq, 0) != 0) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING, "flip queue failed in 
%s: %s\n",
                           __func__, strerror(errno));
                return;
diff --git a/src/amdgpu_present.c b/src/amdgpu_present.c
index dcb18da..3646190 100644
--- a/src/amdgpu_present.c
+++ b/src/amdgpu_present.c
@@ -329,7 +329,8 @@ amdgpu_present_flip(RRCrtcPtr crtc, uint64_t event_id, 
uint64_t target_msc,
                                 pixmap, event_id, event, crtc_id,
                                 amdgpu_present_flip_event,
                                 amdgpu_present_flip_abort,
-                                sync_flip ? FLIP_VSYNC : FLIP_ASYNC);
+                                sync_flip ? FLIP_VSYNC : FLIP_ASYNC,
+                                target_msc);
        if (!ret)
                xf86DrvMsg(scrn->scrnIndex, X_ERROR, "present flip failed\n");
        else
@@ -366,7 +367,7 @@ amdgpu_present_unflip(ScreenPtr screen, uint64_t event_id)
 
        if (amdgpu_do_pageflip(scrn, AMDGPU_DRM_QUEUE_CLIENT_DEFAULT, pixmap,
                               event_id, event, -1, amdgpu_present_flip_event,
-                              amdgpu_present_flip_abort, FLIP_VSYNC))
+                              amdgpu_present_flip_abort, FLIP_VSYNC, 0))
                return;
 
 modeset:
diff --git a/src/amdgpu_probe.h b/src/amdgpu_probe.h
index 1ec1299..0302d02 100644
--- a/src/amdgpu_probe.h
+++ b/src/amdgpu_probe.h
@@ -56,6 +56,7 @@ extern DriverRec AMDGPU;
 
 typedef struct {
        Bool HasCRTC2;          /* All cards except original Radeon  */
+       Bool has_page_flip_target;
 
        amdgpu_device_handle pDev;
 
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index a75cc5c..b569c72 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -2132,6 +2132,71 @@ static void drm_wakeup_handler(pointer data, int err, 
pointer p)
 }
 #endif
 
+static Bool drmmode_probe_page_flip_target(AMDGPUEntPtr pAMDGPUEnt)
+{
+#ifdef DRM_CAP_PAGE_FLIP_TARGET
+       uint64_t cap_value;
+
+       return drmGetCap(pAMDGPUEnt->fd, DRM_CAP_PAGE_FLIP_TARGET,
+                        &cap_value) == 0 && cap_value != 0;
+#else
+       return FALSE;
+#endif
+}
+
+static int
+drmmode_page_flip(AMDGPUEntPtr pAMDGPUEnt, drmmode_crtc_private_ptr 
drmmode_crtc,
+                 uint32_t flags, uintptr_t drm_queue_seq)
+{
+       drmmode_ptr drmmode = drmmode_crtc->drmmode;
+
+       flags |= DRM_MODE_PAGE_FLIP_EVENT;
+       return drmModePageFlip(pAMDGPUEnt->fd, drmmode_crtc->mode_crtc->crtc_id,
+                              drmmode->fb_id, flags, (void*)drm_queue_seq);
+}
+
+int
+drmmode_page_flip_target_absolute(AMDGPUEntPtr pAMDGPUEnt,
+                                 drmmode_crtc_private_ptr drmmode_crtc,
+                                 uint32_t flags, uintptr_t drm_queue_seq,
+                                 uint32_t target_msc)
+{
+#ifdef DRM_MODE_PAGE_FLIP_TARGET
+       if (pAMDGPUEnt->has_page_flip_target) {
+               drmmode_ptr drmmode = drmmode_crtc->drmmode;
+
+               flags |= DRM_MODE_PAGE_FLIP_EVENT | 
DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE;
+               return drmModePageFlipTarget(pAMDGPUEnt->fd,
+                                            drmmode_crtc->mode_crtc->crtc_id,
+                                            drmmode->fb_id, flags,
+                                            (void*)drm_queue_seq, target_msc);
+       }
+#endif
+
+       return drmmode_page_flip(pAMDGPUEnt, drmmode_crtc, flags, 
drm_queue_seq);
+}
+
+int
+drmmode_page_flip_target_relative(AMDGPUEntPtr pAMDGPUEnt,
+                                 drmmode_crtc_private_ptr drmmode_crtc,
+                                 uint32_t flags, uintptr_t drm_queue_seq,
+                                 uint32_t target_msc)
+{
+#ifdef DRM_MODE_PAGE_FLIP_TARGET
+       if (pAMDGPUEnt->has_page_flip_target) {
+               drmmode_ptr drmmode = drmmode_crtc->drmmode;
+
+               flags |= DRM_MODE_PAGE_FLIP_EVENT | 
DRM_MODE_PAGE_FLIP_TARGET_RELATIVE;
+               return drmModePageFlipTarget(pAMDGPUEnt->fd,
+                                            drmmode_crtc->mode_crtc->crtc_id,
+                                            drmmode->fb_id, flags,
+                                            (void*)drm_queue_seq, target_msc);
+       }
+#endif
+
+       return drmmode_page_flip(pAMDGPUEnt, drmmode_crtc, flags, 
drm_queue_seq);
+}
+
 Bool drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int cpp)
 {
        AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(pScrn);
@@ -2198,6 +2263,8 @@ Bool drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr 
drmmode, int cpp)
        drmmode->event_context.vblank_handler = amdgpu_drm_queue_handler;
        drmmode->event_context.page_flip_handler = amdgpu_drm_queue_handler;
 
+       pAMDGPUEnt->has_page_flip_target = 
drmmode_probe_page_flip_target(pAMDGPUEnt);
+
        drmModeFreeResources(mode_res);
        return TRUE;
 }
@@ -2535,7 +2602,8 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
                        PixmapPtr new_front, uint64_t id, void *data,
                        int ref_crtc_hw_id, amdgpu_drm_handler_proc handler,
                        amdgpu_drm_abort_proc abort,
-                       enum drmmode_flip_sync flip_sync)
+                       enum drmmode_flip_sync flip_sync,
+                       uint32_t target_msc)
 {
        AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(scrn);
        xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(scrn);
@@ -2543,7 +2611,7 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
        drmmode_crtc_private_ptr drmmode_crtc = config->crtc[0]->driver_private;
        drmmode_ptr drmmode = drmmode_crtc->drmmode;
        int i;
-       uint32_t flip_flags = DRM_MODE_PAGE_FLIP_EVENT;
+       uint32_t flip_flags = flip_sync == FLIP_ASYNC ? 
DRM_MODE_PAGE_FLIP_ASYNC : 0;
        drmmode_flipdata_ptr flipdata;
        uintptr_t drm_queue_seq = 0;
        uint32_t new_front_handle;
@@ -2585,9 +2653,6 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
        flipdata->handler = handler;
        flipdata->abort = abort;
 
-       if (flip_sync == FLIP_ASYNC)
-               flip_flags |= DRM_MODE_PAGE_FLIP_ASYNC;
-
        for (i = 0; i < config->num_crtc; i++) {
                crtc = config->crtc[i];
 
@@ -2613,13 +2678,21 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
                        goto error;
                }
 
-               if (drmModePageFlip(pAMDGPUEnt->fd, 
drmmode_crtc->mode_crtc->crtc_id,
-                                   drmmode->fb_id, flip_flags,
-                                   (void*)drm_queue_seq)) {
-                       xf86DrvMsg(scrn->scrnIndex, X_WARNING,
-                                  "flip queue failed: %s\n", strerror(errno));
-                       goto error;
+               if (drmmode_crtc->hw_id == ref_crtc_hw_id) {
+                       if (drmmode_page_flip_target_absolute(pAMDGPUEnt,
+                                                             drmmode_crtc,
+                                                             flip_flags,
+                                                             drm_queue_seq,
+                                                             target_msc) != 0)
+                               goto flip_error;
+               } else {
+                       if (drmmode_page_flip_target_relative(pAMDGPUEnt,
+                                                             drmmode_crtc,
+                                                             flip_flags,
+                                                             drm_queue_seq, 0) 
!= 0)
+                               goto flip_error;
                }
+
                drmmode_crtc->flip_pending = TRUE;
                drm_queue_seq = 0;
        }
@@ -2627,6 +2700,10 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
        if (flipdata->flip_count > 0)
                return TRUE;
 
+flip_error:
+       xf86DrvMsg(scrn->scrnIndex, X_WARNING, "flip queue failed: %s\n",
+                  strerror(errno));
+
 error:
        if (flipdata && flipdata->flip_count <= 1) {
                drmModeRmFB(pAMDGPUEnt->fd, drmmode->fb_id);
diff --git a/src/drmmode_display.h b/src/drmmode_display.h
index 2c4a869..49cf012 100644
--- a/src/drmmode_display.h
+++ b/src/drmmode_display.h
@@ -130,6 +130,14 @@ enum drmmode_flip_sync {
 };
 
 
+extern int drmmode_page_flip_target_absolute(AMDGPUEntPtr pAMDGPUEnt,
+                                            drmmode_crtc_private_ptr 
drmmode_crtc,
+                                            uint32_t flags, uintptr_t 
drm_queue_seq,
+                                            uint32_t target_msc);
+extern int drmmode_page_flip_target_relative(AMDGPUEntPtr pAMDGPUEnt,
+                                            drmmode_crtc_private_ptr 
drmmode_crtc,
+                                            uint32_t flags, uintptr_t 
drm_queue_seq,
+                                            uint32_t target_msc);
 extern Bool drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int cpp);
 extern void drmmode_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode);
 extern void drmmode_fini(ScrnInfoPtr pScrn, drmmode_ptr drmmode);
@@ -153,7 +161,8 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
                        PixmapPtr new_front, uint64_t id, void *data,
                        int ref_crtc_hw_id, amdgpu_drm_handler_proc handler,
                        amdgpu_drm_abort_proc abort,
-                       enum drmmode_flip_sync flip_sync);
+                       enum drmmode_flip_sync flip_sync,
+                       uint32_t target_msc);
 int drmmode_crtc_get_ust_msc(xf86CrtcPtr crtc, CARD64 *ust, CARD64 *msc);
 int drmmode_get_current_ust(int drm_fd, CARD64 * ust);
 
-- 
2.10.2

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