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msm_fb: display: wake up system before vsync for cmd panel

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Add this feature for cmd mode panel. The feature is to avoid frame
drops due to power collapse and it is already present for other
display interfaces.

Change-Id: Ic68f41cd59931294b592577475ed7480459f2cf8
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
This commit is contained in:
Huaibin Yang 2012-10-02 15:08:56 -07:00 committed by Stephen Boyd
parent 82c6b4cdd7
commit eebca117d6
2 changed files with 7 additions and 0 deletions
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5
drivers/video/msm/mdp.c
View file

@ -1491,6 +1491,11 @@ void mdp_update_pm(struct msm_fb_data_type *mfd, ktime_t pre_vsync)
vsync_period);
if (diff_to_next > vsync_period)
return;
pr_debug("%s cur_time %d, pre_vsync %d, to_next %d\n",
__func__,
(int)ktime_to_ms(cur_time),
(int)ktime_to_ms(pre_vsync),
diff_to_next);
wakeup_time = ktime_add_ns(cur_time, diff_to_next * NSEC_PER_MSEC);
activate_event_timer(mfd->cpu_pm_hdl, wakeup_time);
}

2
drivers/video/msm/mdp4_overlay_dsi_cmd.c
View file

@ -273,6 +273,8 @@ int mdp4_dsi_cmd_pipe_commit(int cndx, int wait)
pipe = vctrl->base_pipe;
mixer = pipe->mixer_num;
mdp_update_pm(vctrl->mfd, vctrl->vsync_time);
if (vp->update_cnt == 0) {
mutex_unlock(&vctrl->update_lock);
return cnt;