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Commit 07ad6ca0 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

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



Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 9360bd11

drivers/gpu/drm/nouveau/nouveau_display.c

+4 −13
Original line number Diff line number Diff line
@@ -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)