From patchwork Wed Apr 28 13:25:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 428845 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 7222FC433B4 for ; Wed, 28 Apr 2021 13:25:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4190A61419 for ; Wed, 28 Apr 2021 13:25:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239810AbhD1N0g (ORCPT ); Wed, 28 Apr 2021 09:26:36 -0400 Received: from lb2-smtp-cloud9.xs4all.net ([194.109.24.26]:34741 "EHLO lb2-smtp-cloud9.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239801AbhD1N0g (ORCPT ); Wed, 28 Apr 2021 09:26:36 -0400 Received: from cust-b5b5937f ([IPv6:fc0c:c16d:66b8:757f:c639:739b:9d66:799d]) by smtp-cloud9.xs4all.net with ESMTPA id bkCIlVh38k1MGbkCLlOQ26; Wed, 28 Apr 2021 15:25:50 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xs4all.nl; s=s2; t=1619616350; bh=I4LsuZDj0z9KwAm2teshrnmEJ0OYeIIsMWZiM81gqYM=; h=From:To:Subject:Date:Message-Id:MIME-Version:From:Subject; b=rXR99iZF8f0jV11tUSwXymXDk+wv4VtXiULdKdDyEAPu/gX8AGoOf+G3kMzs3D/GH v/YVwPd55wjde871b5PHg8XCgsSPopvwdYj5FUzkI5EWgyakuhpQXJ8SjAwrcxlyDi 4DWAXtHB205kvmpb8Dsdr7wblAaRJwrTPuDKI8JZXnd2fjIBAlGT2yE8RqmPc+vuKy 4jZOWnDzQQXM3FlGmDrbTklQGn1UEH85Dl2ADtUy15VYpEB4kBaQX7FkhxgjsvyvJl Olo/59K/LvRN271flVbKeimWCVDqNzdz9xapj8YiC+3PPZC+8LjOacEn+6KrHYOHPi lMFlh+rbd3pzA== From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Tomi Valkeinen , Tony Lindgren , Laurent Pinchart , dri-devel@lists.freedesktop.org, Hans Verkuil Subject: [PATCHv3 1/6] drm: drm_bridge: add connector_attach/detach bridge ops Date: Wed, 28 Apr 2021 15:25:40 +0200 Message-Id: <20210428132545.1205162-2-hverkuil-cisco@xs4all.nl> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210428132545.1205162-1-hverkuil-cisco@xs4all.nl> References: <20210428132545.1205162-1-hverkuil-cisco@xs4all.nl> MIME-Version: 1.0 X-CMAE-Envelope: MS4xfDrP3ZirMCC5KFdn7pW3xJT36GgiPiG8oeeu4v+ykvL72offX23YO3z9jC3Z5A3iJgqrCaTh5BINYHL/fl1+6UAf1q4tbQv7yIhj9XqiNc2oo44NuArH Qk7jEPGgOwdgTf7SXvj1thAzyMVO47e+ukXninKLi9hK1WEZZZfkFh6ZbFIgwIVyfEd7aYkmSNuFBHa+RVRKgGaW/EcwuECIPmYxUya8YrL1EZWBDPj0kwc/ Bx4nGNi1jCHYtevo7SSe1i0AodVNrXmI8QC0rh9K6//bxK4LAiefiUoQzZ6WeXxUwZKJwKLGZ8oWBh5wYoXbZwaJvj6pFz7ERbjtOYft9pCDMMmTU23jKKQA TQpD6Js2iNFnXErB379sx6FxR+rMVw1saLg60AjHvr27i5dvrds8J7d40bqezwOZ8NaBhpMd Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add bridge connector_attach/detach ops. These ops are called when a bridge is attached or detached to a drm_connector. These ops can be used to register and unregister an HDMI CEC adapter for a bridge that supports CEC. Signed-off-by: Hans Verkuil Reviewed-by: Tomi Valkeinen --- drivers/gpu/drm/drm_bridge_connector.c | 25 +++++++++++++++++++++++- include/drm/drm_bridge.h | 27 ++++++++++++++++++++++++++ 2 files changed, 51 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c index 791379816837..0676677badfe 100644 --- a/drivers/gpu/drm/drm_bridge_connector.c +++ b/drivers/gpu/drm/drm_bridge_connector.c @@ -203,6 +203,11 @@ static void drm_bridge_connector_destroy(struct drm_connector *connector) { struct drm_bridge_connector *bridge_connector = to_drm_bridge_connector(connector); + struct drm_bridge *bridge; + + drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge) + if (bridge->funcs->connector_detach) + bridge->funcs->connector_detach(bridge, connector); if (bridge_connector->bridge_hpd) { struct drm_bridge *hpd = bridge_connector->bridge_hpd; @@ -318,6 +323,7 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm, struct i2c_adapter *ddc = NULL; struct drm_bridge *bridge; int connector_type; + int ret; bridge_connector = kzalloc(sizeof(*bridge_connector), GFP_KERNEL); if (!bridge_connector) @@ -375,6 +381,23 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm, connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; - return connector; + ret = 0; + /* call connector_attach for all bridges */ + drm_for_each_bridge_in_chain(encoder, bridge) { + if (!bridge->funcs->connector_attach) + continue; + ret = bridge->funcs->connector_attach(bridge, connector); + if (ret) + break; + } + if (!ret) + return connector; + + /* on error, detach any previously successfully attached connectors */ + list_for_each_entry_continue_reverse(bridge, &(encoder)->bridge_chain, + chain_node) + if (bridge->funcs->connector_detach) + bridge->funcs->connector_detach(bridge, connector); + return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(drm_bridge_connector_init); diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 2195daa289d2..333fbc3a03e9 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -629,6 +629,33 @@ struct drm_bridge_funcs { * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops. */ void (*hpd_disable)(struct drm_bridge *bridge); + + /** + * @connector_attach: + * + * This callback is invoked whenever our bridge is being attached to a + * &drm_connector. This is where an HDMI CEC adapter can be registered. + * + * The @connector_attach callback is optional. + * + * RETURNS: + * + * Zero on success, error code on failure. + */ + int (*connector_attach)(struct drm_bridge *bridge, + struct drm_connector *conn); + + /** + * @connector_detach: + * + * This callback is invoked whenever our bridge is being detached from a + * &drm_connector. This is where an HDMI CEC adapter can be + * unregistered. + * + * The @connector_detach callback is optional. + */ + void (*connector_detach)(struct drm_bridge *bridge, + struct drm_connector *conn); }; /**