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path: root/drivers/gpu/drm/drm_connector.c
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Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
-rw-r--r--drivers/gpu/drm/drm_connector.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index ca5fb54b7aab..d031a857e0be 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1449,6 +1449,20 @@ static const struct drm_prop_enum_list dp_colorspaces[] = {
* a firmware handled hotkey. Therefor userspace must not include the
* privacy-screen sw-state in an atomic commit unless it wants to change
* its value.
+ *
+ * left margin, right margin, top margin, bottom margin:
+ * Add margins to the connector's viewport. This is typically used to
+ * mitigate underscan on TVs.
+ *
+ * The value is the size in pixels of the black border which will be
+ * added. The attached CRTC's content will be scaled to fill the whole
+ * area inside the margin.
+ *
+ * The margins configuration might be sent to the sink, e.g. via HDMI AVI
+ * InfoFrames.
+ *
+ * Drivers can set up these properties by calling
+ * drm_mode_create_tv_margin_properties().
*/
int drm_connector_create_standard_properties(struct drm_device *dev)
@@ -1593,10 +1607,6 @@ EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
/*
* TODO: Document the properties:
- * - left margin
- * - right margin
- * - top margin
- * - bottom margin
* - brightness
* - contrast
* - flicker reduction