drm/msm/dsi: save pll state before dsi host is powered off

Save pll state before dsi host is powered off. Without this change
some register values gets resetted.

Signed-off-by: Harigovindan P <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>

drivers/gpu/drm/msm/dsi/dsi_manager.c

···
 	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 	struct mipi_dsi_host *host = msm_dsi->host;
 	struct drm_panel *panel = msm_dsi->panel;
+	struct msm_dsi_pll *src_pll;
 	bool is_dual_dsi = IS_DUAL_DSI();
 	int ret;
 
···
 			pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 								id, ret);
 	}
+
+	/* Save PLL status if it is a clock source */
+	src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
+	msm_dsi_pll_save_state(src_pll);
 
 	ret = msm_dsi_host_power_off(host);
 	if (ret)

drivers/gpu/drm/msm/dsi/phy/dsi_phy.c

···
 	if (!phy || !phy->cfg->ops.disable)
 		return;
 
-	/* Save PLL status if it is a clock source */
-	if (phy->usecase != MSM_DSI_PHY_SLAVE)
-		msm_dsi_pll_save_state(phy->pll);
-
 	phy->cfg->ops.disable(phy);
 
 	dsi_phy_regulator_disable(phy);