[PATCH] drm/bridge: lontium-lt8912b: Validate mode in drm_bridge_funcs::mode_valid()

[Liu Ying]

If the bridge is attached with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set,
this driver won't initialize a connector and hence display mode won't be
validated in drm_connector_helper_funcs::mode_valid().  So, move the mode
validation from drm_connector_helper_funcs::mode_valid() to
drm_bridge_funcs::mode_valid(), because the mode validation is always done
for the bridge.

Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Liu Ying <victor....@nxp.com>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 35 ++++++++++++------------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c 
b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 1a9defa15663..e265ab3c8c92 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -422,22 +422,6 @@ static const struct drm_connector_funcs 
lt8912_connector_funcs = {
        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-static enum drm_mode_status
-lt8912_connector_mode_valid(struct drm_connector *connector,
-                           struct drm_display_mode *mode)
-{
-       if (mode->clock > 150000)
-               return MODE_CLOCK_HIGH;
-
-       if (mode->hdisplay > 1920)
-               return MODE_BAD_HVALUE;
-
-       if (mode->vdisplay > 1080)
-               return MODE_BAD_VVALUE;
-
-       return MODE_OK;
-}
-
 static int lt8912_connector_get_modes(struct drm_connector *connector)
 {
        const struct drm_edid *drm_edid;
@@ -463,7 +447,6 @@ static int lt8912_connector_get_modes(struct drm_connector 
*connector)
 
 static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = 
{
        .get_modes = lt8912_connector_get_modes,
-       .mode_valid = lt8912_connector_mode_valid,
 };
 
 static void lt8912_bridge_mode_set(struct drm_bridge *bridge,
@@ -605,6 +588,23 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge)
                drm_bridge_hpd_disable(lt->hdmi_port);
 }
 
+static enum drm_mode_status
+lt8912_bridge_mode_valid(struct drm_bridge *bridge,
+                        const struct drm_display_info *info,
+                        const struct drm_display_mode *mode)
+{
+       if (mode->clock > 150000)
+               return MODE_CLOCK_HIGH;
+
+       if (mode->hdisplay > 1920)
+               return MODE_BAD_HVALUE;
+
+       if (mode->vdisplay > 1080)
+               return MODE_BAD_VVALUE;
+
+       return MODE_OK;
+}
+
 static enum drm_connector_status
 lt8912_bridge_detect(struct drm_bridge *bridge)
 {
@@ -635,6 +635,7 @@ static const struct drm_edid 
*lt8912_bridge_edid_read(struct drm_bridge *bridge,
 static const struct drm_bridge_funcs lt8912_bridge_funcs = {
        .attach = lt8912_bridge_attach,
        .detach = lt8912_bridge_detach,
+       .mode_valid = lt8912_bridge_mode_valid,
        .mode_set = lt8912_bridge_mode_set,
        .enable = lt8912_bridge_enable,
        .detect = lt8912_bridge_detect,
-- 
2.34.1