samsung-sm8650/android_kernel_samsung_sm8650-modules
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disp: msm: queue vblank work on disp thread during modeset

Bläddra i källkod 
If vblank work is queued to event thread, during modeset,
there might be a case where vblank is enabled in between
resulting in vblank ref count mismatch. This change queues
vblank request to disp thread during modeset.

Change-Id: I98b87b4209e1f7f535980eef22a50df17c346c23
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>
This commit is contained in:
Yashwanth
2020-04-21 12:25:23 +05:30
committad av Gerrit - the friendly Code Review server
förälder 4d124f3e10
incheckning 37d86a4d83
1 ändrade filer med 13 tillägg och 2 borttagningar
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15
msm/msm_drv.c
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@@ -349,6 +349,8 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
int crtc_id, bool enable)
{
struct vblank_work *cur_work;
struct drm_crtc *crtc;
struct kthread_worker *worker;
if (!priv || crtc_id >= priv->num_crtcs)
return -EINVAL;
@@ -357,14 +359,23 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
if (!cur_work)
return -ENOMEM;
crtc = priv->crtcs[crtc_id];
kthread_init_work(&cur_work->work, vblank_ctrl_worker);
cur_work->crtc_id = crtc_id;
cur_work->enable = enable;
cur_work->priv = priv;
kthread_queue_work(&priv->event_thread[crtc_id].worker,
&cur_work->work);
/* During modeset scenario, vblank request is queued to
* display thread to avoid enabling irq resulting in
* vblank refcount mismatch
*/
if (crtc->state && drm_atomic_crtc_needs_modeset(crtc->state))
worker = &priv->disp_thread[crtc_id].worker;
else
worker = &priv->event_thread[crtc_id].worker;
kthread_queue_work(worker, &cur_work->work);
return 0;
}