From: Sean Paul <seanpaul@xxxxxxxxxxxx> There exists a case where a flush of a plane/dma may have been triggered & started from an async commit. If that plane/dma is subsequently disabled by the next commit, the flush register will continue to hold the flush bit for the disabled plane. Since the bit remains active, pending_kickoff_cnt will never decrement and we'll miss frame_done events. This patch limits the check of flush_register to include only those bits which have been updated with the latest commit. Changes in v2: - None Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index b3c68c4fcc8e..667f304c92ea 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -331,7 +331,7 @@ static void dpu_encoder_phys_vid_vblank_irq(void *arg, int irq_idx) if (hw_ctl && hw_ctl->ops.get_flush_register) flush_register = hw_ctl->ops.get_flush_register(hw_ctl); - if (flush_register == 0) + if (!(flush_register & hw_ctl->ops.get_pending_flush(hw_ctl))) new_cnt = atomic_add_unless(&phys_enc->pending_kickoff_cnt, -1, 0); spin_unlock_irqrestore(phys_enc->enc_spinlock, lock_flags); -- Sean Paul, Software Engineer, Google / Chromium OS
