From patchwork Fri Jul 3 09:45:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Yan X-Patchwork-Id: 11645041 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B5CFE912 for ; Mon, 6 Jul 2020 07:19:58 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9E4B72070C for ; Mon, 6 Jul 2020 07:19:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E4B72070C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 595E36E2BE; Mon, 6 Jul 2020 07:19:28 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from lucky1.263xmail.com (lucky1.263xmail.com [211.157.147.135]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5D98E6E201 for ; Fri, 3 Jul 2020 09:45:18 +0000 (UTC) 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 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 X-Mailman-Approved-At: Mon, 06 Jul 2020 07:19:18 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, tzimmermann@suse.de, Andy Yan MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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