René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Power Brick control","articleBody":"Hi,\n\nThe FW USB-C PD is a \"dual\" mode device, in that it can both source and sink power.\nThis works quite well when one plugs in a \"source\" mode device or a \"sink\" mode device.\nThere is no ambiguity there.\nThe problem comes when one has a Power Brick that is also a \"dual\" mode device.\n\ndual mode device \u003c=\u003e dual mode device\nWho wins, who charges who?\n\nI would like to add an ectool command so that a user can hint to a particular USB port whether it should act as a source or a sink when it sees a dual mode device.\nIt allows the user to override unexpected behavior.\n\nI am happy to edit the EC source code myself to implement this feature.\nMy question is, what command does the EC need to send the USB-C port to change it from being a \"dual\" mode device to be a \"sink\" mode only device?\n\n ","author":{"url":"https://github.com/jcdutton","@type":"Person","name":"jcdutton"},"datePublished":"2025-04-23T23:25:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/64/EmbeddedController/issues/64"}