drm: bridge/dw_hdmi: add mode_valid support

some platform may not support all the display mode,
add mode_valid interface check it

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 61f8c1f1cd18..8ef21dad3639 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1405,6 +1405,20 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
         return 0;
 }
 
+static enum drm_mode_status
+dw_hdmi_connector_mode_valid(struct drm_connector *connector,
+                             struct drm_display_mode *mode)
+{
+        struct dw_hdmi *hdmi = container_of(connector,
+                                           struct dw_hdmi, connector);
+        enum drm_mode_status mode_status = MODE_OK;
+
+        if (hdmi->plat_data->mode_valid)
+                mode_status = hdmi->plat_data->mode_valid(connector, mode);
+
+        return mode_status;
+}
+
 static struct drm_encoder *dw_hdmi_connector_best_encoder(struct drm_connector
                                                            *connector)
 {
@@ -1429,6 +1443,7 @@ static struct drm_connector_funcs dw_hdmi_connector_funcs = {
 
 static struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
         .get_modes = dw_hdmi_connector_get_modes,
+        .mode_valid = dw_hdmi_connector_mode_valid,
         .best_encoder = dw_hdmi_connector_best_encoder,
 };