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Commit 93a20642 authored by Rajkumar Subbiah's avatar Rajkumar Subbiah Committed by Abhijith Desai
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msm: mdss: wait for pp done when switching from ON to LP1 



If a low power mode switch is initiated while a kickoff is
in progress, the panel could be turned off before the
current frame transfer is completed causing a display hang.
This change recognizes this case and waits for the current
frame to finish before initiating the power state switch.

Change-Id: Ieea32acd67c56a7ed8a83ff92c3b49ad76d70086
Signed-off-by: default avatarRajkumar Subbiah <rsubbia@codeaurora.org>
parent 49104578

drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c

+11 −1
Original line number Diff line number Diff line
@@ -3270,8 +3270,18 @@ int mdss_mdp_cmd_stop(struct mdss_mdp_ctl *ctl, int panel_power_state) 
		 * mode.

		 */

		send_panel_events = true;

		if (mdss_panel_is_power_on_ulp(panel_power_state))

		if (mdss_panel_is_power_on_ulp(panel_power_state)) {

			turn_off_clocks = true;

		} else if (atomic_read(&ctx->koff_cnt)) {

			/*

			 * Transition from interactive to low power

			 * Wait for kickoffs to finish

			 */

			MDSS_XLOG(ctl->num, atomic_read(&ctx->koff_cnt));

			mdss_mdp_cmd_wait4pingpong(ctl, NULL);

			if (sctl)

				mdss_mdp_cmd_wait4pingpong(sctl, NULL);

		}

	} else {

		/* Transitions between low power and ultra low power */

		if (mdss_panel_is_power_on_ulp(panel_power_state)) {