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[23.128.96.18]) by mx.google.com with ESMTP id d1si7768894edo.202.2020.07.03.02.46.14; Fri, 03 Jul 2020 02:46:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726324AbgGCJpU (ORCPT + 99 others); Fri, 3 Jul 2020 05:45:20 -0400 Received: from lucky1.263xmail.com ([211.157.147.135]:33504 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725972AbgGCJpU (ORCPT ); Fri, 3 Jul 2020 05:45:20 -0400 Received: from localhost (unknown [192.168.167.13]) by lucky1.263xmail.com (Postfix) with ESMTP id 29F09A17BF; Fri, 3 Jul 2020 17:45:13 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P9648T140518671496960S1593769508246067_; Fri, 03 Jul 2020 17:45:14 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <61a8935fbe4ef8a294067815218e3673> X-RL-SENDER: andy.yan@rock-chips.com X-SENDER: yxj@rock-chips.com X-LOGIN-NAME: andy.yan@rock-chips.com X-FST-TO: daniel@ffwll.ch X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 X-System-Flag: 0 From: Andy Yan To: daniel@ffwll.ch Cc: airlied@linux.ie, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Andy Yan Subject: [PATCH v2] drm/connector: Add of_drm_find_connector Date: Fri, 3 Jul 2020 17:45:06 +0800 Message-Id: <20200703094506.22527-1-andy.yan@rock-chips.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function to look up a connector by device tree node, like what of_drm_find_bridge/panel does. Signed-off-by: Andy Yan Reported-by: kernel test robot --- Changes in v2: - Add function declaration drivers/gpu/drm/drm_connector.c | 33 +++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 14 ++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index d877ddc6dc57..516376cd1868 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -743,6 +743,39 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) } EXPORT_SYMBOL(drm_connector_list_iter_end); +#ifdef CONFIG_OF +/** + * of_drm_find_connector - look up a connector using a device tree node + * @np: device tree node of the connector + * + * + * Return: A pointer to the connector which match the specified device tree + * node or NULL if no panel matching the device tree node can be found, or + * -ENODEV: the device is not available (status != "okay" or "ok") + */ +struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np) +{ + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + + if (!of_device_is_available(np)) + return ERR_PTR(-ENODEV); + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->of_node == np) { + drm_connector_list_iter_end(&conn_iter); + return connector; + } + } + drm_connector_list_iter_end(&conn_iter); + + return NULL; +} +EXPORT_SYMBOL(of_drm_find_connector); +#endif + + static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { { SubPixelUnknown, "Unknown" }, { SubPixelHorizontalRGB, "Horizontal RGB" }, diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index fd543d1db9b2..d249e0498375 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1129,6 +1129,9 @@ struct drm_connector { /** @attr: sysfs attributes */ struct device_attribute *attr; + /** @of_node: device tree node */ + struct device_node *of_node; + /** * @head: * @@ -1647,6 +1650,17 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter); bool drm_connector_has_possible_encoder(struct drm_connector *connector, struct drm_encoder *encoder); +#if defined(CONFIG_OF) +struct drm_connector * +of_drm_find_connector(struct drm_device *dev, const struct device_node *np); +#else +static inline struct drm_connector * +of_drm_find_connector(struct drm_device *dev, const struct device_node *np) +{ + return ERR_PTR(-ENODEV); +} +#endif + /** * drm_for_each_connector_iter - connector_list iterator macro * @connector: &struct drm_connector pointer used as cursor -- 2.17.1