drm/msm: rework vblank event handling in dpu_crtc

The vblank on/off calls were missing in dpu_crtc
leading to "driver forgot to call drm_crtc_vblank_off()"
warning while entering suspend state.
Also handle the state update completion event for
a crtc being disabled in current atomic commit.

This patch depends on https://www.spinics.net/lists/dri-devel/msg182402.html

Signed-off-by: Rajesh Yadav <ryadav@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index bcc4796..7ac0e0d 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1606,6 +1606,7 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
        struct drm_encoder *encoder;
        struct msm_drm_private *priv;
        int ret;
+       unsigned long flags;
 
        if (!crtc || !crtc->dev || !crtc->dev->dev_private || !crtc->state) {
                DPU_ERROR("invalid crtc\n");
@@ -1621,6 +1622,9 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
        if (dpu_kms_is_suspend_state(crtc->dev))
                _dpu_crtc_set_suspend(crtc, true);
 
+       /* Disable/save vblank irq handling */
+       drm_crtc_vblank_off(crtc);
+
        mutex_lock(&dpu_crtc->crtc_lock);
 
        /* wait for frame_event_done completion */
@@ -1658,7 +1662,6 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
                dpu_power_handle_unregister_event(dpu_crtc->phandle,
                                dpu_crtc->power_event);
 
-
        memset(dpu_crtc->mixers, 0, sizeof(dpu_crtc->mixers));
        dpu_crtc->num_mixers = 0;
        dpu_crtc->mixers_swapped = false;
@@ -1668,6 +1671,13 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
        cstate->bw_split_vote = false;
 
        mutex_unlock(&dpu_crtc->crtc_lock);
+
+       if (crtc->state->event && !crtc->state->active) {
+               spin_lock_irqsave(&crtc->dev->event_lock, flags);
+               drm_crtc_send_vblank_event(crtc, crtc->state->event);
+               crtc->state->event = NULL;
+               spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+       }
 }
 
 static void dpu_crtc_enable(struct drm_crtc *crtc,
@@ -1707,6 +1717,9 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 
        mutex_unlock(&dpu_crtc->crtc_lock);
 
+       /* Enable/restore vblank irq handling */
+       drm_crtc_vblank_on(crtc);
+
        dpu_crtc->power_event = dpu_power_handle_register_event(
                dpu_crtc->phandle,
                DPU_POWER_EVENT_POST_ENABLE | DPU_POWER_EVENT_POST_DISABLE |