disp: msm: sde: update autorefresh disable sequence

Autorefresh might be still in enabled state after
write_ptr reached to display height. This patch
checks the autorefresh status bit and keeps polling
the bit till autorefresh sequence is in enabled
state. It times out after 1 second if autorefresh
is still in enabled state.

Change-Id: I5d4f4cb35e5cc8c680c1878f52cee385f709d764
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/sde/sde_hw_intf.c

@@ -550,10 +550,11 @@ static int sde_hw_intf_setup_autorefresh_config(struct sde_hw_intf *intf,
 
 	c = &intf->hw;
 
+	refresh_cfg = SDE_REG_READ(c, INTF_TEAR_AUTOREFRESH_CONFIG);
 	if (cfg->enable)
 		refresh_cfg = BIT(31) | cfg->frame_count;
 	else
-		refresh_cfg = 0;
+		refresh_cfg &= ~BIT(31);
 
 	SDE_REG_WRITE(c, INTF_TEAR_AUTOREFRESH_CONFIG, refresh_cfg);