From patchwork Fri Mar 29 02:40:24 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 2361031 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by patchwork2.kernel.org (Postfix) with ESMTP id B19E2DF2A1 for ; Fri, 29 Mar 2013 02:48:45 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [IPv6:::1]) by mail.linuxfoundation.org (Postfix) with ESMTP id B093098F; Fri, 29 Mar 2013 02:46:00 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTP id BD2B4AFB for ; Fri, 29 Mar 2013 02:45:52 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 06F551FCC3 for ; Fri, 29 Mar 2013 02:45:50 +0000 (UTC) Received: from ayumi.akashicho.tokyo.vergenet.net (p8120-ipbfp1001kobeminato.hyogo.ocn.ne.jp [118.10.137.120]) by kirsty.vergenet.net (Postfix) with ESMTP id C2C3E2C69EB; Fri, 29 Mar 2013 13:45:36 +1100 (EST) Received: by ayumi.akashicho.tokyo.vergenet.net (Postfix, from userid 7100) id 666CBEDEA23; Fri, 29 Mar 2013 11:45:35 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Fri, 29 Mar 2013 11:40:24 +0900 Message-Id: <1364525119-31791-96-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1364525119-31791-1-git-send-email-horms+renesas@verge.net.au> References: <1364525119-31791-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RP_MATCHES_RCVD autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH/RFC 095/390] drm: handle HPD and polled connectors separately X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org From: Daniel Vetter Instead of reusing the polling code for hpd handling, split them up. This has a few consequences: - Don't touch HPD capable connectors in the poll loop. - Only touch HPD capable connectors in drm_helper_hpd_irq_event. - We could run the HPD handling directly (because all callers already use their own work item), but for easier bisect that happens in it's own patch. The ultimate goal is that drivers grow some smarts about which connectors have received a hotplug event and only call the detect code of that connector. But that's a second step. v2: s/hdp/hpd/, noticed by Adam Jackson. I can't type. v3: Split out the work item removal as requested by Dave Airlie. This results in a temporary mode_config.hpd_irq_work item to keep things the same. v4: In the hpd_irq_event handler don't bail out if other bits than HPD are set. This is useful where e.g. hpd is unreliably, but mostly works. Drivers can then set both HPD and POLL flags, and users get the best of both worlds: Quick hotplug feedback if the hpd works, but still reliable detection with the polling. The poll loop already works the same, and doesn't bail if HPD is set. Signed-off-by: Daniel Vetter Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie (cherry picked from commit 816da85a0990c2b52cfffa77637d1c770d6790e9) Conflicts: drivers/gpu/drm/drm_crtc_helper.c Signed-off-by: Simon Horman --- drivers/gpu/drm/drm_crtc_helper.c | 51 ++++++++++++++++++++++++++++++------- include/drm/drm_crtc.h | 1 + 2 files changed, 43 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index e37ae17..d3a39f8 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -960,9 +960,9 @@ static void output_poll_execute(struct work_struct *work) mutex_lock(&dev->mode_config.mutex); list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - /* if this is HPD or polled don't check it - - TV out for instance */ - if (!connector->polled) + /* Ignore HPD capable connectors and connectors where we don't + * want any hotplug detection at all for polling. */ + if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) continue; else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) @@ -972,8 +972,7 @@ static void output_poll_execute(struct work_struct *work) /* if we are connected and don't want to poll for disconnect skip it */ if (old_status == connector_status_connected && - !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) && - !(connector->polled & DRM_CONNECTOR_POLL_HPD)) + !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) continue; connector->status = connector->funcs->detect(connector, false); @@ -1020,9 +1019,12 @@ void drm_kms_helper_poll_enable(struct drm_device *dev) } EXPORT_SYMBOL(drm_kms_helper_poll_enable); +static void hpd_irq_event_execute(struct work_struct *work); + void drm_kms_helper_poll_init(struct drm_device *dev) { INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); + INIT_DELAYED_WORK(&dev->mode_config.hpd_irq_work, hpd_irq_event_execute); dev->mode_config.poll_enabled = true; drm_kms_helper_poll_enable(dev); @@ -1035,14 +1037,45 @@ void drm_kms_helper_poll_fini(struct drm_device *dev) } EXPORT_SYMBOL(drm_kms_helper_poll_fini); -void drm_helper_hpd_irq_event(struct drm_device *dev) +static void hpd_irq_event_execute(struct work_struct *work) { + struct delayed_work *delayed_work = to_delayed_work(work); + struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.hpd_irq_work); + struct drm_connector *connector; + enum drm_connector_status old_status; + bool changed = false; + if (!dev->mode_config.poll_enabled) return; - /* kill timer and schedule immediate execution, this doesn't block */ - cancel_delayed_work(&dev->mode_config.output_poll_work); + mutex_lock(&dev->mode_config.mutex); + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + + /* Only handle HPD capable connectors. */ + if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) + continue; + + old_status = connector->status; + + connector->status = connector->funcs->detect(connector, false); + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", + connector->base.id, + drm_get_connector_name(connector), + old_status, connector->status); + if (old_status != connector->status) + changed = true; + } + + mutex_unlock(&dev->mode_config.mutex); + + if (changed) + drm_kms_helper_hotplug_event(dev); +} + +void drm_helper_hpd_irq_event(struct drm_device *dev) +{ + cancel_delayed_work(&dev->mode_config.hpd_irq_work); if (drm_kms_helper_poll) - queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); + queue_delayed_work(system_nrt_wq, &dev->mode_config.hpd_irq_work, 0); } EXPORT_SYMBOL(drm_helper_hpd_irq_event); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 1f5f1d6..ccff8c9 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -793,6 +793,7 @@ struct drm_mode_config { /* output poll support */ bool poll_enabled; struct delayed_work output_poll_work; + struct delayed_work hpd_irq_work; /* pointers to standard properties */ struct list_head property_blob_list;