[PATCH v2 1/2] drm/bridge: tc358767: Introduce __tc_bridge_enable/disable()

[Andrey Smirnov]

Expose underlying implementation of bridge's enable/disable functions,
so it would be possible to use them in other parts of the driver.

Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
Cc: Andrzej Hajda <a.ha...@samsung.com>
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkei...@ti.com>
Cc: Cory Tusar <cory.tu...@zii.aero>
Cc: Chris Healy <cphe...@gmail.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-ker...@vger.kernel.org
---
 drivers/gpu/drm/bridge/tc358767.c | 32 ++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c 
b/drivers/gpu/drm/bridge/tc358767.c
index 6308d93ad91d..8532048e0550 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1220,39 +1220,43 @@ static void tc_bridge_pre_enable(struct drm_bridge 
*bridge)
        drm_panel_prepare(tc->panel);
 }
 
-static void tc_bridge_enable(struct drm_bridge *bridge)
+static int __tc_bridge_enable(struct tc_data *tc)
 {
-       struct tc_data *tc = bridge_to_tc(bridge);
        int ret;
 
        ret = tc_get_display_props(tc);
        if (ret < 0) {
                dev_err(tc->dev, "failed to read display props: %d\n", ret);
-               return;
+               return ret;
        }
 
        ret = tc_main_link_enable(tc);
        if (ret < 0) {
                dev_err(tc->dev, "main link enable error: %d\n", ret);
-               return;
+               return ret;
        }
 
        ret = tc_stream_enable(tc);
        if (ret < 0) {
                dev_err(tc->dev, "main link stream start error: %d\n", ret);
                tc_main_link_disable(tc);
-               return;
+               return ret;
        }
 
-       drm_panel_enable(tc->panel);
+       return 0;
 }
 
-static void tc_bridge_disable(struct drm_bridge *bridge)
+static void tc_bridge_enable(struct drm_bridge *bridge)
 {
        struct tc_data *tc = bridge_to_tc(bridge);
-       int ret;
 
-       drm_panel_disable(tc->panel);
+       if (!__tc_bridge_enable(tc))
+               drm_panel_enable(tc->panel);
+}
+
+static int __tc_bridge_disable(struct tc_data *tc)
+{
+       int ret;
 
        ret = tc_stream_disable(tc);
        if (ret < 0)
@@ -1261,6 +1265,16 @@ static void tc_bridge_disable(struct drm_bridge *bridge)
        ret = tc_main_link_disable(tc);
        if (ret < 0)
                dev_err(tc->dev, "main link disable error: %d\n", ret);
+
+       return ret;
+}
+
+static void tc_bridge_disable(struct drm_bridge *bridge)
+{
+       struct tc_data *tc = bridge_to_tc(bridge);
+
+       drm_panel_disable(tc->panel);
+       __tc_bridge_disable(tc);
 }
 
 static void tc_bridge_post_disable(struct drm_bridge *bridge)
-- 
2.21.0