renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-28 15:13:55 +08:00
Code

drm/msm: subclass work object for vblank events

Browse Source 
msm maintains a separate structure to define vblank
work definitions and a list to track events submitted
to the workqueue. We can avoid this redundant list
and its protection mechanism, if we subclass the
work object to encapsulate vblank event parameters.

changes in v2:
	- subclass optimization on system wq (Sean Paul)
changes in v3:
	- none
changes in v4:
	- move flush_workqueue before irq uninstall
changes in v5:
	- none

Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
This commit is contained in:
Jeykumar Sankaran 2018-12-14 15:57:55 -08:00 committed by Sean Paul
parent d9db30ce7d
commit 48d1d28eec
2 changed files with 22 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
drivers/gpu/drm/msm/msm_drv.c
View File

@ -207,61 +207,44 @@ u32 msm_readl(const void __iomem *addr)
return val;
}
struct vblank_event {
struct list_head node;
struct msm_vblank_work {
struct work_struct work;
int crtc_id;
bool enable;
struct msm_drm_private *priv;
};
static void vblank_ctrl_worker(struct work_struct *work)
{
struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
struct msm_vblank_ctrl, work);
struct msm_drm_private *priv = container_of(vbl_ctrl,
struct msm_drm_private, vblank_ctrl);
struct msm_vblank_work *vbl_work = container_of(work,
struct msm_vblank_work, work);
struct msm_drm_private *priv = vbl_work->priv;
struct msm_kms *kms = priv->kms;
struct vblank_event *vbl_ev, *tmp;
unsigned long flags;
spin_lock_irqsave(&vbl_ctrl->lock, flags);
list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
list_del(&vbl_ev->node);
spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
if (vbl_work->enable)
kms->funcs->enable_vblank(kms, priv->crtcs[vbl_work->crtc_id]);
else
kms->funcs->disable_vblank(kms, priv->crtcs[vbl_work->crtc_id]);
if (vbl_ev->enable)
kms->funcs->enable_vblank(kms,
priv->crtcs[vbl_ev->crtc_id]);
else
kms->funcs->disable_vblank(kms,
priv->crtcs[vbl_ev->crtc_id]);
kfree(vbl_ev);
spin_lock_irqsave(&vbl_ctrl->lock, flags);
}
spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
kfree(vbl_work);
}
static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
int crtc_id, bool enable)
{
struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
struct vblank_event *vbl_ev;
unsigned long flags;
struct msm_vblank_work *vbl_work;
vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC);
if (!vbl_ev)
vbl_work = kzalloc(sizeof(*vbl_work), GFP_ATOMIC);
if (!vbl_work)
return -ENOMEM;
vbl_ev->crtc_id = crtc_id;
vbl_ev->enable = enable;
INIT_WORK(&vbl_work->work, vblank_ctrl_worker);
spin_lock_irqsave(&vbl_ctrl->lock, flags);
list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
vbl_work->crtc_id = crtc_id;
vbl_work->enable = enable;
vbl_work->priv = priv;
queue_work(priv->wq, &vbl_ctrl->work);
queue_work(priv->wq, &vbl_work->work);
return 0;
}
@ -273,19 +256,15 @@ static int msm_drm_uninit(struct device *dev)
struct msm_drm_private *priv = ddev->dev_private;
struct msm_kms *kms = priv->kms;
struct msm_mdss *mdss = priv->mdss;
struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
struct vblank_event *vbl_ev, *tmp;
int i;
/* We must cancel and cleanup any pending vblank enable/disable
* work before drm_irq_uninstall() to avoid work re-enabling an
* irq after uninstall has disabled it.
*/
flush_work(&vbl_ctrl->work);
list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
list_del(&vbl_ev->node);
kfree(vbl_ev);
}
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
/* clean up event worker threads */
for (i = 0; i < priv->num_crtcs; i++) {
@ -315,9 +294,6 @@ static int msm_drm_uninit(struct device *dev)
drm_irq_uninstall(ddev);
pm_runtime_put_sync(dev);
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
if (kms && kms->funcs)
kms->funcs->destroy(kms);
@ -482,9 +458,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
priv->wq = alloc_ordered_workqueue("msm", 0);
INIT_LIST_HEAD(&priv->inactive_list);
INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
spin_lock_init(&priv->vblank_ctrl.lock);
drm_mode_config_init(ddev);

7
drivers/gpu/drm/msm/msm_drv.h
View File

@ -77,12 +77,6 @@ enum msm_mdp_plane_property {
PLANE_PROP_MAX_NUM
};
struct msm_vblank_ctrl {
struct work_struct work;
struct list_head event_list;
spinlock_t lock;
};
#define MSM_GPU_MAX_RINGS 4
#define MAX_H_TILES_PER_DISPLAY 2
@ -227,7 +221,6 @@ struct msm_drm_private {
struct notifier_block vmap_notifier;
struct shrinker shrinker;
struct msm_vblank_ctrl vblank_ctrl;
struct drm_atomic_state *pm_state;
};