From f32fad51eec51ad816cecdc3723ab443cd69b61f Mon Sep 17 00:00:00 2001 From: Mark Yao Date: Wed, 16 Dec 2015 18:09:38 +0800 Subject: [PATCH] drm/rockchip: support atomic asynchronous commit If drm core requests a async commit, rockchip_drm_atomic_commit will schedule a work task to update later. Signed-off-by: Mark Yao --- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 ++ drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 10 ++++ drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 54 ++++++++++++++++----- 3 files changed, 54 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index 929eb30e49e5..8397d1b62ef9 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -140,6 +140,9 @@ static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags) if (!private) return -ENOMEM; + mutex_init(&private->commit.lock); + INIT_WORK(&private->commit.work, rockchip_drm_atomic_work); + drm_dev->dev_private = private; drm_mode_config_init(drm_dev); diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h index 4468f98ec437..bb8b076f1dbb 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h @@ -42,6 +42,13 @@ struct rockchip_crtc_funcs { void (*wait_for_update)(struct drm_crtc *crtc); }; +struct rockchip_atomic_commit { + struct work_struct work; + struct drm_atomic_state *state; + struct drm_device *dev; + struct mutex lock; +}; + /* * Rockchip drm private structure. * @@ -52,8 +59,11 @@ struct rockchip_drm_private { struct drm_fb_helper fbdev_helper; struct drm_gem_object *fbdev_bo; const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC]; + + struct rockchip_atomic_commit commit; }; +void rockchip_drm_atomic_work(struct work_struct *work); int rockchip_register_crtc_funcs(struct drm_crtc *crtc, const struct rockchip_crtc_funcs *crtc_funcs); void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc); diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c index df1b7b0e9926..f7844883cb76 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c @@ -210,20 +210,11 @@ rockchip_atomic_wait_for_complete(struct drm_atomic_state *old_state) } } -int rockchip_drm_atomic_commit(struct drm_device *dev, - struct drm_atomic_state *state, - bool async) +static void +rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit) { - int ret; - - if (async) - return -EBUSY; - - ret = drm_atomic_helper_prepare_planes(dev, state); - if (ret) - return ret; - - drm_atomic_helper_swap_state(dev, state); + struct drm_atomic_state *state = commit->state; + struct drm_device *dev = commit->dev; /* * TODO: do fence wait here. @@ -255,6 +246,43 @@ int rockchip_drm_atomic_commit(struct drm_device *dev, drm_atomic_helper_cleanup_planes(dev, state); drm_atomic_state_free(state); +} + +void rockchip_drm_atomic_work(struct work_struct *work) +{ + struct rockchip_atomic_commit *commit = container_of(work, + struct rockchip_atomic_commit, work); + + rockchip_atomic_commit_complete(commit); +} + +int rockchip_drm_atomic_commit(struct drm_device *dev, + struct drm_atomic_state *state, + bool async) +{ + struct rockchip_drm_private *private = dev->dev_private; + struct rockchip_atomic_commit *commit = &private->commit; + int ret; + + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) + return ret; + + /* serialize outstanding asynchronous commits */ + mutex_lock(&commit->lock); + flush_work(&commit->work); + + drm_atomic_helper_swap_state(dev, state); + + commit->dev = dev; + commit->state = state; + + if (async) + schedule_work(&commit->work); + else + rockchip_atomic_commit_complete(commit); + + mutex_unlock(&commit->lock); return 0; } -- 2.20.1