From nobody Thu Apr 2 18:27:59 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 712BCC6FA82 for ; Wed, 21 Sep 2022 18:27:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229578AbiIUS1F (ORCPT ); Wed, 21 Sep 2022 14:27:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229960AbiIUS07 (ORCPT ); Wed, 21 Sep 2022 14:26:59 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 798449F0F6 for ; Wed, 21 Sep 2022 11:26:58 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id o23-20020a17090aac1700b002006b02384fso8904540pjq.3 for ; Wed, 21 Sep 2022 11:26:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=to:from:subject:message-id:mime-version:date:from:to:cc:subject :date; bh=vFrM7jTrAe8cGuQWt79XnjMjIT7+U0OcgpCLaS8L5xY=; b=aI6utDeZbSBgGg2dXRRFWszZJP5AtEa1SM6gifQL6mGZxV43Anh3XmPMI1EZUipHXE L24qw71oZJvZrYGfiNfElLFQ3S6Lhhg3IrJ+aL0I727X8z2YYvHlQmYWVQWQtd2V3xVu wzBePcqNZ9g2y/zempi724MQ2oYQtT6XpaKWJRqESDRvNpg37u2I0ooRZiSfh3KnyO0B CE0nhLGF1WVNKwRK0i/p2Jka7qDdS5GoKXBnNd+5GcRSW+/sX1hxEte5rXOmbHvIEOpI FPtSkMa2fl7zu7H3QlEufH18ScmCh5c86wIf9qRrhQDGVvfaYN09ljaBqPRaZNg4JhEP 3K/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date; bh=vFrM7jTrAe8cGuQWt79XnjMjIT7+U0OcgpCLaS8L5xY=; b=j5H3rt3m1PbMILuIKGV3oL42nXoy8GkoaJ1lCIC1TDkPJg5KFigVRH8a/syS4xC13j qefRcI16hQFL7B2g5Ah72t6zpX8FsETejDCtTexP45IhMM/ghTU4GHx9aPuKaWGkdnrT YooUnqpZfJ1Uk1J8isWmf3y9IVJq3uuH29DeXc1sQ1TVOXc4ouwXVKlYS1EhGIEtownC FrPwd2w00CmGImraD/x3uz42hocnTH5pFBecHD5xf95nUxFoma52D1Mj3ZHX1q52HOGw M4Lg2Q9IcB8I8ram+9FNcsabW+UyvRef7V+whhasnRGGI18RunZkq/jd8K3q/7vRgiZd ae9w== X-Gm-Message-State: ACrzQf3cx3zbB9yyEPk6wTRKHQbNhHT0OFsmJD9wTy8RFxC2TyEr/wFd u993FiqUaqwfedvjLNwFjvfoBp4Kj9u7+w== X-Google-Smtp-Source: AMsMyM4kWbXlK3DtWnqQ2eraV9ytOrd//B5Pe7HOQCc89/e6XZ/wCSghpbf9AZHMyiE//nHzCp7Y6/PRkbnPYw== X-Received: from wonchungspecialist.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:1440]) (user=wonchung job=sendgmr) by 2002:a17:90a:ab91:b0:202:a520:56c9 with SMTP id n17-20020a17090aab9100b00202a52056c9mr11260998pjq.1.1663784818046; Wed, 21 Sep 2022 11:26:58 -0700 (PDT) Date: Wed, 21 Sep 2022 18:26:37 +0000 Mime-Version: 1.0 X-Mailer: git-send-email 2.37.3.968.ga6b4b080e4-goog Message-ID: <20220921182637.4056670-1-wonchung@google.com> Subject: [PATCH] drm/sysfs: Link DRM connectors to corresponding Type-C connectors From: Won Chung To: wonchung@google.com, bleung@google.com, pmalani@chromium.org, heikki.krogerus@linux.intel.com, imre.deak@intel.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Create a symlink pointing to USB Type-C connector for DRM connectors when they are created. The link will be created only if the firmware is able to describe the connection beween the two connectors. Signed-off-by: Won Chung --- drivers/gpu/drm/drm_sysfs.c | 42 +++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 430e00b16eec..8270b02e6783 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -11,12 +11,14 @@ */ =20 #include +#include #include #include #include #include #include #include +#include #include =20 #include @@ -95,6 +97,36 @@ static char *drm_devnode(struct device *dev, umode_t *mo= de) return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); } =20 +static int typec_connector_bind(struct device *dev, + struct device *typec_connector, void *data) +{ + int ret; + + ret =3D sysfs_create_link(&dev->kobj, &typec_connector->kobj, + "typec_connector"); + if (ret) + return ret; + + ret =3D sysfs_create_link(&typec_connector->kobj, &dev->kobj, + "drm_connector"); + if (ret) + sysfs_remove_link(&dev->kobj, "typec_connector"); + + return ret; +} + +static void typec_connector_unbind(struct device *dev, + struct device *typec_connector, void *data) +{ + sysfs_remove_link(&typec_connector->kobj, "drm_connector"); + sysfs_remove_link(&dev->kobj, "typec_connector"); +} + +static const struct component_ops typec_connector_ops =3D { + .bind =3D typec_connector_bind, + .unbind =3D typec_connector_unbind, +}; + static CLASS_ATTR_STRING(version, S_IRUGO, "drm 1.1.0 20060810"); =20 /** @@ -355,6 +387,13 @@ int drm_sysfs_connector_add(struct drm_connector *conn= ector) if (connector->ddc) return sysfs_create_link(&connector->kdev->kobj, &connector->ddc->dev.kobj, "ddc"); + + if (dev_fwnode(kdev)) { + r =3D component_add(kdev, &typec_connector_ops); + if (r) + drm_err(dev, "failed to add component\n"); + } + return 0; =20 err_free: @@ -367,6 +406,9 @@ void drm_sysfs_connector_remove(struct drm_connector *c= onnector) if (!connector->kdev) return; =20 + if (dev_fwnode(connector->kdev)) + component_del(connector->kdev, &typec_connector_ops); + if (connector->ddc) sysfs_remove_link(&connector->kdev->kobj, "ddc"); =20 --=20 2.37.2.789.g6183377224-goog