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msm: display: vsync usage in turning off dsi video

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Add timeout to waiting for vsync so that it can come out
when vsync interrupt is not working.
Need not wait for vsync after timing engine is off.

Change-Id: Ib989e435405613d891024ba15144723730454e34
Signed-off-by: Ken Zhang <kenz@codeaurora.org>
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
This commit is contained in:
Naseer Ahmed 2013-05-13 13:56:23 -04:00
parent 4da0857ac5
commit 0f16f59916
1 changed files with 8 additions and 2 deletions
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10
drivers/video/msm/mdp4_overlay_dsi_video.c
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@ -336,6 +336,7 @@ void mdp4_dsi_video_wait4vsync(int cndx)
struct vsycn_ctrl *vctrl;
struct mdp4_overlay_pipe *pipe;
unsigned long flags;
int ret;
if (cndx >= MAX_CONTROLLER) {
pr_err("%s: out or range: cndx=%d\n", __func__, cndx);
@ -356,8 +357,12 @@ void mdp4_dsi_video_wait4vsync(int cndx)
vctrl->wait_vsync_cnt++;
spin_unlock_irqrestore(&vctrl->spin_lock, flags);
/* double the timeout in vsync time stamp generation */
ret = wait_for_completion_interruptible_timeout(&vctrl->vsync_comp,
msecs_to_jiffies(VSYNC_PERIOD * 8));
if (ret <= 0)
pr_err("%s timeout ret=%d", __func__, ret);
wait_for_completion(&vctrl->vsync_comp);
mdp4_video_vsync_irq_ctrl(cndx, 0);
mdp4_stat.wait4vsync0++;
}
@ -524,7 +529,8 @@ static void mdp4_dsi_video_tg_off(struct vsycn_ctrl *vctrl)
MDP_OUTP(MDP_BASE + DSI_VIDEO_BASE, 0); /* turn off timing generator */
spin_unlock_irqrestore(&vctrl->spin_lock, flags);
mdp4_dsi_video_wait4vsync(0);
/* some delay after turning off the tg */
msleep(20);
}
int mdp4_dsi_video_splash_done(void)