diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index fa5194caf259..898591792b12 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -13,6 +13,8 @@ #include #include +#include +#include #include #include @@ -36,6 +38,56 @@ #define DRIVER_MAJOR 1 #define DRIVER_MINOR 0 +struct exynos_atomic_commit { + struct work_struct work; + struct drm_device *dev; + struct drm_atomic_state *state; + u32 crtcs; +}; + +static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit) +{ + struct drm_device *dev = commit->dev; + struct exynos_drm_private *priv = dev->dev_private; + struct drm_atomic_state *state = commit->state; + + drm_atomic_helper_commit_modeset_disables(dev, state); + + drm_atomic_helper_commit_modeset_enables(dev, state); + + /* + * Exynos can't update planes with CRTCs and encoders disabled, + * its updates routines, specially for FIMD, requires the clocks + * to be enabled. So it is necessary to handle the modeset operations + * *before* the commit_planes() step, this way it will always + * have the relevant clocks enabled to perform the update. + */ + + drm_atomic_helper_commit_planes(dev, state); + + drm_atomic_helper_wait_for_vblanks(dev, state); + + drm_atomic_helper_cleanup_planes(dev, state); + + drm_atomic_state_free(state); + + spin_lock(&priv->lock); + priv->pending &= ~commit->crtcs; + spin_unlock(&priv->lock); + + wake_up_all(&priv->wait); + + kfree(commit); +} + +static void exynos_drm_atomic_work(struct work_struct *work) +{ + struct exynos_atomic_commit *commit = container_of(work, + struct exynos_atomic_commit, work); + + exynos_atomic_commit_complete(commit); +} + static int exynos_drm_load(struct drm_device *dev, unsigned long flags) { struct exynos_drm_private *private; @@ -47,6 +99,9 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags) if (!private) return -ENOMEM; + init_waitqueue_head(&private->wait); + spin_lock_init(&private->lock); + dev_set_drvdata(dev->dev, dev); dev->dev_private = (void *)private; @@ -149,6 +204,64 @@ static int exynos_drm_unload(struct drm_device *dev) return 0; } +static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs) +{ + bool pending; + + spin_lock(&priv->lock); + pending = priv->pending & crtcs; + spin_unlock(&priv->lock); + + return pending; +} + +int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, + bool async) +{ + struct exynos_drm_private *priv = dev->dev_private; + struct exynos_atomic_commit *commit; + int i, ret; + + commit = kzalloc(sizeof(*commit), GFP_KERNEL); + if (!commit) + return -ENOMEM; + + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) { + kfree(commit); + return ret; + } + + /* This is the point of no return */ + + INIT_WORK(&commit->work, exynos_drm_atomic_work); + commit->dev = dev; + commit->state = state; + + /* Wait until all affected CRTCs have completed previous commits and + * mark them as pending. + */ + for (i = 0; i < dev->mode_config.num_crtc; ++i) { + if (state->crtcs[i]) + commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]); + } + + wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs)); + + spin_lock(&priv->lock); + priv->pending |= commit->crtcs; + spin_unlock(&priv->lock); + + drm_atomic_helper_swap_state(dev, state); + + if (async) + schedule_work(&commit->work); + else + exynos_atomic_commit_complete(commit); + + return 0; +} + static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state) { struct drm_connector *connector; diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index 81168034ce87..b06fbd43b475 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -170,6 +170,9 @@ struct drm_exynos_file_private { * @da_space_size: size of device address space. * if 0 then default value is used for it. * @pipe: the pipe number for this crtc/manager. + * @pending: the crtcs that have pending updates to finish + * @lock: protect access to @pending + * @wait: wait an atomic commit to finish */ struct exynos_drm_private { struct drm_fb_helper *fb_helper; @@ -185,6 +188,11 @@ struct exynos_drm_private { unsigned long da_space_size; unsigned int pipe; + + /* for atomic commit */ + u32 pending; + spinlock_t lock; + wait_queue_head_t wait; }; /* @@ -243,6 +251,9 @@ static inline int exynos_dpi_bind(struct drm_device *dev, } #endif +int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, + bool async); + extern struct platform_driver fimd_driver; extern struct platform_driver exynos5433_decon_driver; diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c index 9738f4e0c6eb..59ebbe547290 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c @@ -267,41 +267,6 @@ static void exynos_drm_output_poll_changed(struct drm_device *dev) exynos_drm_fbdev_init(dev); } -static int exynos_atomic_commit(struct drm_device *dev, - struct drm_atomic_state *state, - bool async) -{ - int ret; - - ret = drm_atomic_helper_prepare_planes(dev, state); - if (ret) - return ret; - - /* This is the point of no return */ - - drm_atomic_helper_swap_state(dev, state); - - drm_atomic_helper_commit_modeset_disables(dev, state); - - drm_atomic_helper_commit_modeset_enables(dev, state); - - /* - * Exynos can't update planes with CRTCs and encoders disabled, - * its updates routines, specially for FIMD, requires the clocks - * to be enabled. So it is necessary to handle the modeset operations - * *before* the commit_planes() step, this way it will always - * have the relevant clocks enabled to perform the update. - */ - - drm_atomic_helper_commit_planes(dev, state); - - drm_atomic_helper_cleanup_planes(dev, state); - - drm_atomic_state_free(state); - - return 0; -} - static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { .fb_create = exynos_user_fb_create, .output_poll_changed = exynos_drm_output_poll_changed,