From 043e7fb6e6c3a3fc6d5a3a434ad555e5ff79da3b Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 22 Mar 2017 22:50:51 +0100 Subject: [PATCH] drm/atomic-helper: remove backoff hack from page_flip Yay, we can now properly retry in case of deadlocks or whatever! Also don't forget to remove the transitional crtc->acquire_ctx assignment again. Reviewed-by: Harry Wentland Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170322215058.8671-13-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_atomic_helper.c | 40 ++--------------------------- drivers/gpu/drm/drm_plane.c | 1 - 2 files changed, 2 insertions(+), 39 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 96561ecf736f..5771def4cef0 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -2884,34 +2884,16 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); + state->acquire_ctx = ctx; -retry: ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; ret = drm_atomic_nonblocking_commit(state); - fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_page_flip); @@ -2948,9 +2930,8 @@ int drm_atomic_helper_page_flip_target( if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); + state->acquire_ctx = ctx; -retry: ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; @@ -2963,26 +2944,9 @@ retry: crtc_state->target_vblank = target; ret = drm_atomic_nonblocking_commit(state); - fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 373e980d698d..ec3e2e757800 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -875,7 +875,6 @@ retry: ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx); if (ret) goto out; - crtc->acquire_ctx = &ctx; if (crtc->primary->fb == NULL) { /* The framebuffer is currently unbound, presumably -- 2.20.1