drm/nouveau: there is no need to reserve/fence the new fb when flipping

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 44642d9..547c42b 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -26,7 +26,6 @@
 
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
-#include <drm/ttm/ttm_execbuf_util.h>
 
 #include "nouveau_fbcon.h"
 #include "dispnv04/hw.h"
@@ -594,12 +593,6 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
        struct nouveau_page_flip_state *s;
        struct nouveau_channel *chan = NULL;
        struct nouveau_fence *fence;
-       struct ttm_validate_buffer resv[2] = {
-               { .bo = &old_bo->bo },
-               { .bo = &new_bo->bo },
-       };
-       struct ww_acquire_ctx ticket;
-       LIST_HEAD(res);
        int ret;
 
        if (!drm->channel)
@@ -622,13 +615,10 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
                ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
                if (ret)
                        goto fail_free;
-
-               list_add(&resv[1].head, &res);
        }
-       list_add(&resv[0].head, &res);
 
        mutex_lock(&chan->cli->mutex);
-       ret = ttm_eu_reserve_buffers(&ticket, &res);
+       ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL);
        if (ret)
                goto fail_unpin;
 
@@ -656,14 +646,15 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
        /* Update the crtc struct and cleanup */
        crtc->fb = fb;
 
-       ttm_eu_fence_buffer_objects(&ticket, &res, fence);
+       nouveau_bo_fence(old_bo, fence);
+       ttm_bo_unreserve(&old_bo->bo);
        if (old_bo != new_bo)
                nouveau_bo_unpin(old_bo);
        nouveau_fence_unref(&fence);
        return 0;
 
 fail_unreserve:
-       ttm_eu_backoff_reservation(&ticket, &res);
+       ttm_bo_unreserve(&old_bo->bo);
 fail_unpin:
        mutex_unlock(&chan->cli->mutex);
        if (old_bo != new_bo)