disp: msm: only set nolp command when panel in LP1/LP2 mode

DSI driver sends nolp commands when DSI connector power
modes is set SDE_MODE_DPMS_ON or SDE_MODE_DPMS_OFF. This
is invalid panel configuration. It should only send nolp
commmand to panel when it is in LP1/LP2 mode.

Change-Id: Ie94eaef6899d292fd20f42c1b7ef2c7a99178d13
Signed-off-by: Wenjun Zhang <wjzhan@codeaurora.org>
Signed-off-by: Yuan Zhao <yzhao@codeaurora.org>

msm/dsi/dsi_display.c

@@ -1060,10 +1060,22 @@ int dsi_display_set_power(struct drm_connector *connector,
 	case SDE_MODE_DPMS_LP2:
 		rc = dsi_panel_set_lp2(display->panel);
 		break;
-	default:
-		rc = dsi_panel_set_nolp(display->panel);
+	case SDE_MODE_DPMS_ON:
+		if ((display->panel->power_mode == SDE_MODE_DPMS_LP1) ||
+			(display->panel->power_mode == SDE_MODE_DPMS_LP2))
+			rc = dsi_panel_set_nolp(display->panel);
 		break;
+	case SDE_MODE_DPMS_OFF:
+	default:
+		return rc;
 	}
+
+	DSI_DEBUG("Power mode transition from %d to %d %s",
+			display->panel->power_mode, power_mode,
+			rc ? "failed" : "successful");
+	if (!rc)
+		display->panel->power_mode = power_mode;
+
 	return rc;
 }