drm/bridge/synopsys: dsi: missing post disable

Sometime the post_disable function is missing (not registered).

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1579602296-7683-1-git-send-email-yannick.fertre@st.com

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index b18351b..12823ae 100644 (file)
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -824,7 +824,8 @@ static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge)
         * This needs to be fixed in the drm_bridge framework and the API
         * needs to be updated to manage our own call chains...
         */
-       dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
+       if (dsi->panel_bridge->funcs->post_disable)
+               dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
 
        if (phy_ops->power_off)
                phy_ops->power_off(dsi->plat_data->priv_data);