From: Maarten Lankhorst Date: Tue, 11 Jul 2017 14:33:04 +0000 (+0200) Subject: drm/atomic: Change drm_atomic_helper_swap_state to return an error. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c066d2310ae9bbc695c06e9237f6ea741ec35e43;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/atomic: Change drm_atomic_helper_swap_state to return an error. We want to change swap_state to wait indefinitely, but to do this swap_state should wait interruptibly. This requires propagating the error to each driver. Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Cc: intel-gfx@lists.freedesktop.org Signed-off-by: Maarten Lankhorst Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-3-maarten.lankhorst@linux.intel.com Reviewed-by: Daniel Vetter [mlankhorst: Fix typos in swap_state documentation (seanpaul)] Reviewed-by: Sean Paul ] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 2f675112e225..8d8221a128d0 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1510,10 +1510,8 @@ int drm_atomic_helper_commit(struct drm_device *dev, if (!nonblock) { ret = drm_atomic_helper_wait_for_fences(dev, state, true); - if (ret) { - drm_atomic_helper_cleanup_planes(dev, state); - return ret; - } + if (ret) + goto err; } /* @@ -1522,7 +1520,9 @@ int drm_atomic_helper_commit(struct drm_device *dev, * the software side now. */ - drm_atomic_helper_swap_state(state, true); + ret = drm_atomic_helper_swap_state(state, true); + if (ret) + goto err; /* * Everything below can be run asynchronously without the need to grab @@ -1551,6 +1551,10 @@ int drm_atomic_helper_commit(struct drm_device *dev, commit_tail(state); return 0; + +err: + drm_atomic_helper_cleanup_planes(dev, state); + return ret; } EXPORT_SYMBOL(drm_atomic_helper_commit); @@ -2228,14 +2232,14 @@ EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); /** * drm_atomic_helper_swap_state - store atomic state into current sw state * @state: atomic state - * @stall: stall for proceeding commits + * @stall: stall for preceeding commits * * This function stores the atomic state into the current state pointers in all * driver objects. It should be called after all failing steps have been done * and succeeded, but before the actual hardware state is committed. * * For cleanup and error recovery the current state for all changed objects will - * be swaped into @state. + * be swapped into @state. * * With that sequence it fits perfectly into the plane prepare/cleanup sequence: * @@ -2254,8 +2258,12 @@ EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With * the current atomic helpers this is almost always the case, since the helpers * don't pass the right state structures to the callbacks. + * + * Returns: + * + * Always returns 0, cannot fail yet. */ -void drm_atomic_helper_swap_state(struct drm_atomic_state *state, +int drm_atomic_helper_swap_state(struct drm_atomic_state *state, bool stall) { int i; @@ -2339,6 +2347,8 @@ void drm_atomic_helper_swap_state(struct drm_atomic_state *state, state->private_objs[i].state = old_obj_state; obj->state = new_obj_state; } + + return 0; } EXPORT_SYMBOL(drm_atomic_helper_swap_state); diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index 7db3438ff735..547480692470 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -86,8 +86,7 @@ void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, bool atomic); -void drm_atomic_helper_swap_state(struct drm_atomic_state *state, - bool stall); +int drm_atomic_helper_swap_state(struct drm_atomic_state *state, bool stall); /* nonblocking commit helpers */ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,