From patchwork Wed May 5 16:24:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 431488 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FFCFC433ED for ; Wed, 5 May 2021 16:24:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B4B5613C0 for ; Wed, 5 May 2021 16:24:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233951AbhEEQZd (ORCPT ); Wed, 5 May 2021 12:25:33 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:25169 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233937AbhEEQZd (ORCPT ); Wed, 5 May 2021 12:25:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620231876; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eq83juyiC0A1Rv/3Ef1B6xxWIY6Y1ZLa64lO/MXaVkc=; b=SvaC+mVuNT8Hv0s5aTxTS446thC1ItEoqUStnbXPMduBFkRu1SZ36gLFgDrkFYxF4ONEKb C5nE4PRNrhYhWhinkmABX9+quWzOj91CSGdlgtGYuyIhUwA0RCcy2Bk26Dwt6ZUTZsRvc8 mDkT34xLNNN5w7YA0sNoGRe44Btro08= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-469-jfKtro3jPFeDwnyutzdB1Q-1; Wed, 05 May 2021 12:24:33 -0400 X-MC-Unique: jfKtro3jPFeDwnyutzdB1Q-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 38E6F1008076; Wed, 5 May 2021 16:24:31 +0000 (UTC) Received: from x1.localdomain.com (ovpn-112-71.ams2.redhat.com [10.36.112.71]) by smtp.corp.redhat.com (Postfix) with ESMTP id 57F3F761E0; Wed, 5 May 2021 16:24:28 +0000 (UTC) From: Hans de Goede To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Daniel Vetter , David Airlie , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Imre Deak , Greg Kroah-Hartman , Guenter Roeck , Heikki Krogerus Cc: Hans de Goede , intel-gfx , dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 3/8] drm/connector: Add drm_connector_find_by_fwnode() function (v2) Date: Wed, 5 May 2021 18:24:10 +0200 Message-Id: <20210505162415.531876-4-hdegoede@redhat.com> In-Reply-To: <20210505162415.531876-1-hdegoede@redhat.com> References: <20210505162415.531876-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add a function to find a connector based on a fwnode. This will be used by the new drm_connector_oob_hotplug_event() function which is added by the next patch in this patch-set. Changes in v2: - Complete rewrite to use a global connector list in drm_connector.c rather then using a class-dev-iter in drm_sysfs.c Signed-off-by: Hans de Goede --- drivers/gpu/drm/drm_connector.c | 50 +++++++++++++++++++++++++++++ drivers/gpu/drm/drm_crtc_internal.h | 1 + include/drm/drm_connector.h | 8 +++++ 3 files changed, 59 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 6b5b4762c434..70aa50ea7b8b 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -65,6 +65,14 @@ * support can instead use e.g. drm_helper_hpd_irq_event(). */ +/* + * Global connector list for drm_connector_find_by_fwnode(). + * Note drm_connector_[un]register() first take connector->lock and then + * take the connector_list_lock. + */ +static DEFINE_MUTEX(connector_list_lock); +static LIST_HEAD(connector_list); + struct drm_conn_prop_enum_list { int type; const char *name; @@ -267,6 +275,7 @@ int drm_connector_init(struct drm_device *dev, goto out_put_type_id; } + INIT_LIST_HEAD(&connector->global_connector_list_entry); INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); @@ -534,6 +543,9 @@ int drm_connector_register(struct drm_connector *connector) /* Let userspace know we have a new connector */ drm_sysfs_hotplug_event(connector->dev); + mutex_lock(&connector_list_lock); + list_add_tail(&connector->global_connector_list_entry, &connector_list); + mutex_unlock(&connector_list_lock); goto unlock; err_debugfs: @@ -562,6 +574,10 @@ void drm_connector_unregister(struct drm_connector *connector) return; } + mutex_lock(&connector_list_lock); + list_del_init(&connector->global_connector_list_entry); + mutex_unlock(&connector_list_lock); + if (connector->funcs->early_unregister) connector->funcs->early_unregister(connector); @@ -2473,6 +2489,40 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, return ret; } +/** + * drm_connector_find_by_fwnode - Find a connector based on the associated fwnode + * @fwnode: fwnode for which to find the matching drm_connector + * + * This functions looks up a drm_connector based on its associated fwnode. When + * a connector is found a reference to the connector is returned. The caller must + * call drm_connector_put() to release this reference when it is done with the + * connector. + * + * Returns: A reference to the found connector or an ERR_PTR(). + */ +struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode) +{ + struct drm_connector *connector, *found = ERR_PTR(-ENODEV); + + if (!fwnode) + return ERR_PTR(-ENODEV); + + mutex_lock(&connector_list_lock); + + list_for_each_entry(connector, &connector_list, global_connector_list_entry) { + if (connector->fwnode == fwnode || + (connector->fwnode && connector->fwnode->secondary == fwnode)) { + drm_connector_get(connector); + found = connector; + break; + } + } + + mutex_unlock(&connector_list_lock); + + return found; +} + /** * DOC: Tile group diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index 54d4cf1233e9..6e28fc00a740 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -185,6 +185,7 @@ int drm_connector_set_obj_prop(struct drm_mode_object *obj, int drm_connector_create_standard_properties(struct drm_device *dev); const char *drm_get_connector_force_name(enum drm_connector_force force); void drm_connector_free_work_fn(struct work_struct *work); +struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode); /* IOCTL */ int drm_connector_property_set_ioctl(struct drm_device *dev, diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 2c4cbc686a22..8ae5dbe3d4ae 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1242,6 +1242,14 @@ struct drm_connector { */ struct list_head head; + /** + * @global_connector_list_entry: + * + * Connector entry in the global connector-list, used by + * drm_connector_find_by_fwnode(). + */ + struct list_head global_connector_list_entry; + /** @base: base KMS object */ struct drm_mode_object base;