Some global KMS state that is elsewhere protected by the mode_config mutex here needs to be protected with a local mutex. Remove corresponding lockdep checks and introduce a new driver-private global_kms_state_mutex, and make sure its locking order is *after* the crtc locks in order to avoid having to release those when the new mutex is taken.
Signed-off-by: Thomas Hellstrom thellstrom@vmware.com Reviewed-by: Brian Paul brianp@vmware.com Reviewed-by: Sinclair Yeh syeh@vmware.com --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 1 + drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 1 + drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 27 +++++++++++++-------------- drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 3 +++ drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c | 3 +++ 5 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index 6cbb7d4..f2cf923 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -628,6 +628,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset) mutex_init(&dev_priv->cmdbuf_mutex); mutex_init(&dev_priv->release_mutex); mutex_init(&dev_priv->binding_mutex); + mutex_init(&dev_priv->global_kms_state_mutex); rwlock_init(&dev_priv->resource_lock); ttm_lock_init(&dev_priv->reservation_sem); spin_lock_init(&dev_priv->hw_lock); diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 019a6ca..6db358a 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -412,6 +412,7 @@ struct vmw_private { struct drm_property *implicit_placement_property; unsigned num_implicit; struct vmw_framebuffer *implicit_fb; + struct mutex global_kms_state_mutex;
/* * Context and surface management. diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 4742ec4..b07543b 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -2143,13 +2143,13 @@ int vmw_kms_fbdev_init_data(struct vmw_private *dev_priv, void vmw_kms_del_active(struct vmw_private *dev_priv, struct vmw_display_unit *du) { - lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex); - + mutex_lock(&dev_priv->global_kms_state_mutex); if (du->active_implicit) { if (--(dev_priv->num_implicit) == 0) dev_priv->implicit_fb = NULL; du->active_implicit = false; } + mutex_unlock(&dev_priv->global_kms_state_mutex); }
/** @@ -2165,8 +2165,7 @@ void vmw_kms_add_active(struct vmw_private *dev_priv, struct vmw_display_unit *du, struct vmw_framebuffer *vfb) { - lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex); - + mutex_lock(&dev_priv->global_kms_state_mutex); WARN_ON_ONCE(!dev_priv->num_implicit && dev_priv->implicit_fb);
if (!du->active_implicit && du->is_implicit) { @@ -2174,6 +2173,7 @@ void vmw_kms_add_active(struct vmw_private *dev_priv, du->active_implicit = true; dev_priv->num_implicit++; } + mutex_unlock(&dev_priv->global_kms_state_mutex); }
/** @@ -2190,16 +2190,13 @@ bool vmw_kms_crtc_flippable(struct vmw_private *dev_priv, struct drm_crtc *crtc) { struct vmw_display_unit *du = vmw_crtc_to_du(crtc); + bool ret;
- lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex); - - if (!du->is_implicit) - return true; - - if (dev_priv->num_implicit != 1) - return false; + mutex_lock(&dev_priv->global_kms_state_mutex); + ret = !du->is_implicit || dev_priv->num_implicit == 1; + mutex_unlock(&dev_priv->global_kms_state_mutex);
- return true; + return ret; }
/** @@ -2214,16 +2211,18 @@ void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv, struct vmw_display_unit *du = vmw_crtc_to_du(crtc); struct vmw_framebuffer *vfb;
- lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex); + mutex_lock(&dev_priv->global_kms_state_mutex);
if (!du->is_implicit) - return; + goto out_unlock;
vfb = vmw_framebuffer_to_vfb(crtc->primary->fb); WARN_ON_ONCE(dev_priv->num_implicit != 1 && dev_priv->implicit_fb != vfb);
dev_priv->implicit_fb = vfb; +out_unlock: + mutex_unlock(&dev_priv->global_kms_state_mutex); }
/** diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c index 0ea22fd..b74eae2 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c @@ -285,14 +285,17 @@ static int vmw_sou_crtc_set_config(struct drm_mode_set *set) }
/* Only one active implicit frame-buffer at a time. */ + mutex_lock(&dev_priv->global_kms_state_mutex); if (sou->base.is_implicit && dev_priv->implicit_fb && vfb && !(dev_priv->num_implicit == 1 && sou->base.active_implicit) && dev_priv->implicit_fb != vfb) { + mutex_unlock(&dev_priv->global_kms_state_mutex); DRM_ERROR("Multiple implicit framebuffers not supported.\n"); return -EINVAL; } + mutex_unlock(&dev_priv->global_kms_state_mutex);
/* since they always map one to one these are safe */ connector = &sou->base.connector; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c index b949102..9ca818f 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c @@ -553,12 +553,15 @@ static int vmw_stdu_crtc_set_config(struct drm_mode_set *set) }
/* Only one active implicit frame-buffer at a time. */ + mutex_lock(&dev_priv->global_kms_state_mutex); if (!turning_off && stdu->base.is_implicit && dev_priv->implicit_fb && !(dev_priv->num_implicit == 1 && stdu->base.active_implicit) && dev_priv->implicit_fb != vfb) { + mutex_unlock(&dev_priv->global_kms_state_mutex); DRM_ERROR("Multiple implicit framebuffers not supported.\n"); return -EINVAL; } + mutex_unlock(&dev_priv->global_kms_state_mutex);
/* Since they always map one to one these are safe */ connector = &stdu->base.connector;