Commit f9116c90 authored Nov 03, 2016 by Sachin Bhayare Committed by Gerrit - the friendly Code Review server Jun 22, 2018

msm: mdss: fix NOC error in accessing accessing DMA status reg

In current implementation theres is a possibility that clk_off_work
will get scheduled twice after idle time out. When this happens
NOC error are observed in accessing DMA status register.

Fix issue by scheduling clk_off_work only once after each idle time out.

Change-Id: I4b6b2acb8f3260d281d5ca6ff9d54de7051e7b39
Signed-off-by: Sachin Bhayare <sachin.bhayare@codeaurora.org>

parent 43ec4acf

drivers/video/msm/mdss/mdp3_ctrl.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -300,11 +300,12 @@ void vsync_count_down(void *arg)
		{
		struct mdp3_session_data session = (struct mdp3_session_data )arg;
		/* We are counting down to turn off clocks */
		if (atomic_read(&session->vsync_countdown) > 0)
		if (atomic_read(&session->vsync_countdown) > 0) {
		atomic_dec(&session->vsync_countdown);
		if (atomic_read(&session->vsync_countdown) == 0)
		schedule_work(&session->clk_off_work);
		}
		}

		void mdp3_ctrl_reset_countdown(struct mdp3_session_data *session,
		struct msm_fb_data_type *mfd)