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

[ Upstream commit a1028dcfd0dd97884072288d0c8ed7f30399b528 ]

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

Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 10d49d43c17eb7265f0b1272c09d37ee7f4d4f35..d46b9e75a8473d81aea17fb930818d6b33fbd6b7 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -438,6 +438,7 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
        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;
 
@@ -471,6 +472,10 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
                                                                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)
                pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);