From patchwork Fri Mar 18 10:01:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Brodkin X-Patchwork-Id: 8630501 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D83769F36E for ; Mon, 21 Mar 2016 09:25:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E632D20279 for ; Mon, 21 Mar 2016 09:25:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 0042B20274 for ; Mon, 21 Mar 2016 09:25:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 39E3C6E25C; Mon, 21 Mar 2016 09:24:52 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtprelay.synopsys.com (smtprelay4.synopsys.com [198.182.47.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 178786EBBD for ; Fri, 18 Mar 2016 10:02:05 +0000 (UTC) Received: from dc8secmta2.synopsys.com (dc8secmta2.synopsys.com [10.13.218.202]) by smtprelay.synopsys.com (Postfix) with ESMTP id 28B9324E1506; Fri, 18 Mar 2016 03:02:04 -0700 (PDT) Received: from dc8secmta2.internal.synopsys.com (dc8secmta2.internal.synopsys.com [127.0.0.1]) by dc8secmta2.internal.synopsys.com (Service) with ESMTP id 1CA55A4116; Fri, 18 Mar 2016 03:02:04 -0700 (PDT) Received: from mailhost.synopsys.com (unknown [10.13.184.66]) by dc8secmta2.internal.synopsys.com (Service) with ESMTP id CF88DA4114; Fri, 18 Mar 2016 03:02:03 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id B94DBE8C; Fri, 18 Mar 2016 03:02:03 -0700 (PDT) Received: from abrodkin-7440l.internal.synopsys.com (unknown [10.121.8.125]) by mailhost.synopsys.com (Postfix) with ESMTP id 5B4D6E7C; Fri, 18 Mar 2016 03:02:02 -0700 (PDT) From: Alexey Brodkin To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/3] drm: introduce drm_connector_plug_all() helper Date: Fri, 18 Mar 2016 13:01:42 +0300 Message-Id: <1458295304-5528-2-git-send-email-abrodkin@synopsys.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1458295304-5528-1-git-send-email-abrodkin@synopsys.com> References: <1458295304-5528-1-git-send-email-abrodkin@synopsys.com> X-Mailman-Approved-At: Mon, 21 Mar 2016 09:24:51 +0000 Cc: Alexey Brodkin , linux-kernel@vger.kernel.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP As a pair to already existing drm_connector_unplug_all() we're adding generic implementation of what is already done in some drivers. Once this helper is implemented we'll be ready to switch existing driver-specific implementations with generic one. Signed-off-by: Alexey Brodkin Cc: Daniel Vetter Cc: David Airlie --- drivers/gpu/drm/drm_crtc.c | 44 +++++++++++++++++++++++++++++++++++++++++++- drivers/gpu/drm/drm_drv.c | 3 ++- include/drm/drm_crtc.h | 3 ++- 3 files changed, 47 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 65258ac..ce27420 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1080,6 +1080,46 @@ void drm_connector_unregister(struct drm_connector *connector) } EXPORT_SYMBOL(drm_connector_unregister); +/** + * drm_connector_plug_all - register connector userspace interfaces + * @dev: drm device + * + * This function registers all connector userspace interfaces in sysfs. Should + * be call when the device is disconnected, e.g. from an usb driver's + * ->connect callback. + */ +int drm_connector_plug_all(struct drm_device *dev) +{ + struct drm_connector *connector, *failed; + int ret; + + mutex_lock(&dev->mode_config.mutex); + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + ret = drm_connector_register(connector); + if (ret) { + failed = connector; + goto err; + } + } + + mutex_unlock(&dev->mode_config.mutex); + + return 0; + +err: + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + if (failed == connector) + break; + + drm_connector_unregister(connector); + } + + mutex_unlock(&dev->mode_config.mutex); + + return ret; +} +EXPORT_SYMBOL(drm_connector_plug_all); /** * drm_connector_unplug_all - unregister connector userspace interfaces @@ -1093,10 +1133,12 @@ void drm_connector_unplug_all(struct drm_device *dev) { struct drm_connector *connector; - /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ + mutex_lock(&dev->mode_config.mutex); + list_for_each_entry(connector, &dev->mode_config.connector_list, head) drm_connector_unregister(connector); + mutex_unlock(&dev->mode_config.mutex); } EXPORT_SYMBOL(drm_connector_unplug_all); diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 167c8d3..4a559c6 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -715,7 +715,8 @@ EXPORT_SYMBOL(drm_dev_unref); * * Register the DRM device @dev with the system, advertise device to user-space * and start normal device operation. @dev must be allocated via drm_dev_alloc() - * previously. + * previously and right after drm_dev_register() driver should call + * drm_connector_plug_all() to register all connectors in sysfs. * * Never call this twice on any device! * diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 8c7fb3d..aa8789e 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -2214,7 +2214,8 @@ void drm_connector_unregister(struct drm_connector *connector); extern void drm_connector_cleanup(struct drm_connector *connector); extern unsigned int drm_connector_index(struct drm_connector *connector); -/* helper to unplug all connectors from sysfs for device */ +/* helpers to plug/unplug all connectors to/from sysfs for device */ +extern int drm_connector_plug_all(struct drm_device *dev); extern void drm_connector_unplug_all(struct drm_device *dev); extern int drm_bridge_add(struct drm_bridge *bridge);