[PATCH v9 04/25] drm/connector: Only register TV mode property if present

[Maxime Ripard]

The drm_create_tv_properties() will create the TV mode property
unconditionally.

However, since we'll gradually phase it out, let's register it only if we
have a list passed as an argument. This will make the transition easier.

Acked-by: Noralf Trønnes <noralf at tronnes.org>
Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit at gmail.com>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 drivers/gpu/drm/drm_connector.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 05edff79d312..78fcffae100b 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1690,15 +1690,18 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
 	if (drm_mode_create_tv_margin_properties(dev))
 		goto nomem;
 
-	dev->mode_config.legacy_tv_mode_property =
-		drm_property_create(dev, DRM_MODE_PROP_ENUM,
-				    "mode", num_modes);
-	if (!dev->mode_config.legacy_tv_mode_property)
-		goto nomem;
 
-	for (i = 0; i < num_modes; i++)
-		drm_property_add_enum(dev->mode_config.legacy_tv_mode_property,
-				      i, modes[i]);
+	if (num_modes) {
+		dev->mode_config.legacy_tv_mode_property =
+			drm_property_create(dev, DRM_MODE_PROP_ENUM,
+					    "mode", num_modes);
+		if (!dev->mode_config.legacy_tv_mode_property)
+			goto nomem;
+
+		for (i = 0; i < num_modes; i++)
+			drm_property_add_enum(dev->mode_config.legacy_tv_mode_property,
+					      i, modes[i]);
+	}
 
 	dev->mode_config.tv_brightness_property =
 		drm_property_create_range(dev, 0, "brightness", 0, 100);

-- 
b4 0.11.0-dev-99e3a