From patchwork Tue May 15 14:42:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 10401357 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3329F601F9 for ; Tue, 15 May 2018 14:43:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 204901FF2D for ; Tue, 15 May 2018 14:43:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 14A37205AB; Tue, 15 May 2018 14:43:49 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 985241FF2D for ; Tue, 15 May 2018 14:43:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754166AbeEOOmg (ORCPT ); Tue, 15 May 2018 10:42:36 -0400 Received: from mail-qt0-f193.google.com ([209.85.216.193]:46833 "EHLO mail-qt0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754063AbeEOOme (ORCPT ); Tue, 15 May 2018 10:42:34 -0400 Received: by mail-qt0-f193.google.com with SMTP id m16-v6so519729qtg.13 for ; Tue, 15 May 2018 07:42:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HGItCk8tB+qz9r6eO3SQ1D6ZEAn5mfuOUC3Y35WojUQ=; b=KVOACkPUICsPlolt7GI5XQi5Y/FeGDiZ0r9JZzt9lPidGfCnxjIwvnsTgiDiTUpwSx hjUKG7VJOBQWgJ6r2pAWEcn16MdoEC5cUVKkbTxKfRvukECGO/nMOO1P0/P2M8OvlWmo nc+tMXR2KTAVCKD8oyIIe/TRRoj3cXBgw9wz+YFdgsuopoN1HixMQudsNzzA9ZzmXYK5 /kC3iKTr/s5eWYwj8Ecr4Rs7YZBFGnAIAZQrW2hxwG9guv+7Na5e7P8vrO8scFi38TGA 0xhUamjE3FjkM9dr/+cf7kz5TNh0f+VTy8Qt1l7/KWwvmZqWmdFz65bQn97RVXA4bvnf 9J/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HGItCk8tB+qz9r6eO3SQ1D6ZEAn5mfuOUC3Y35WojUQ=; b=qHdPC3i+NroQrGuKwY1ZDFd58LMMa1O76O11XzpSHfKvRgSqiLdn2w7iL/z+M/VUzs GsNPhH6kREdRSNcouRi526csinRDoWpRhveKnAlzLmHPm69pxiZc3l7fepSqUafcxjfh xxtsoM27gLRs/4OMEHl42XWXYm5nVtYhWXnRA+udsDuRZq94Gqs5hUalnNz2T/qgi+Vl onrrBQL/TeGrYrIP0Z3ozsJNSG/ADZN7gYLO8Xy91awfgG7LV2tMjJ9Adog8Q4fQRIjO wdd8ZUfnvEDM1sL5mQfmnj8L6hdSKuIntKsS7vLi38tQwATtAufxlU/TizG4rsG2Bz2X xoCQ== X-Gm-Message-State: ALKqPweg+hdPucy4JvmlEFJugMAW7HPSq7k7PRyDgXM1uMCZnAYAddC/ S3W9gTUccoVjIjzPm3VkxO5iXA== X-Google-Smtp-Source: AB8JxZqDzgSzu9Dvh8ZhWW2nhvyhhg6WLyHfqbFhinwV1raipzkld6pp3HCEy4xIoEQcYdKoYYmYFA== X-Received: by 2002:a0c:b4c1:: with SMTP id h1-v6mr13637700qvf.87.1526395353146; Tue, 15 May 2018 07:42:33 -0700 (PDT) Received: from localhost.localdomain ([2620:0:1043:fd00:748b:2433:2688:e1f]) by smtp.gmail.com with ESMTPSA id z5-v6sm132693qtb.88.2018.05.15.07.42.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 15 May 2018 07:42:32 -0700 (PDT) From: Neil Armstrong To: airlied@linux.ie, hans.verkuil@cisco.com, lee.jones@linaro.org, olof@lixom.net, seanpaul@google.com Cc: Neil Armstrong , sadolfsson@google.com, felixe@google.com, bleung@google.com, darekm@google.com, marcheu@chromium.org, fparent@baylibre.com, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/5] media: cec-notifier: Get notifier by device and connector name Date: Tue, 15 May 2018 16:42:18 +0200 Message-Id: <1526395342-15481-2-git-send-email-narmstrong@baylibre.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526395342-15481-1-git-send-email-narmstrong@baylibre.com> References: <1526395342-15481-1-git-send-email-narmstrong@baylibre.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In non device-tree world, we can need to get the notifier by the driver name directly and eventually defer probe if not yet created. This patch adds a variant of the get function by using the device name instead and will not create a notifier if not yet created. But the i915 driver exposes at least 2 HDMI connectors, this patch also adds the possibility to add a connector name tied to the notifier device to form a tuple and associate different CEC controllers for each HDMI connectors. Signed-off-by: Neil Armstrong --- drivers/media/cec/cec-notifier.c | 11 ++++++++--- include/media/cec-notifier.h | 27 ++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/media/cec/cec-notifier.c b/drivers/media/cec/cec-notifier.c index 16dffa0..dd2078b 100644 --- a/drivers/media/cec/cec-notifier.c +++ b/drivers/media/cec/cec-notifier.c @@ -21,6 +21,7 @@ struct cec_notifier { struct list_head head; struct kref kref; struct device *dev; + const char *conn; struct cec_adapter *cec_adap; void (*callback)(struct cec_adapter *adap, u16 pa); @@ -30,13 +31,14 @@ struct cec_notifier { static LIST_HEAD(cec_notifiers); static DEFINE_MUTEX(cec_notifiers_lock); -struct cec_notifier *cec_notifier_get(struct device *dev) +struct cec_notifier *cec_notifier_get_conn(struct device *dev, const char *conn) { struct cec_notifier *n; mutex_lock(&cec_notifiers_lock); list_for_each_entry(n, &cec_notifiers, head) { - if (n->dev == dev) { + if (n->dev == dev && + (!conn || !strcmp(n->conn, conn))) { kref_get(&n->kref); mutex_unlock(&cec_notifiers_lock); return n; @@ -46,6 +48,8 @@ struct cec_notifier *cec_notifier_get(struct device *dev) if (!n) goto unlock; n->dev = dev; + if (conn) + n->conn = kstrdup(conn, GFP_KERNEL); n->phys_addr = CEC_PHYS_ADDR_INVALID; mutex_init(&n->lock); kref_init(&n->kref); @@ -54,7 +58,7 @@ struct cec_notifier *cec_notifier_get(struct device *dev) mutex_unlock(&cec_notifiers_lock); return n; } -EXPORT_SYMBOL_GPL(cec_notifier_get); +EXPORT_SYMBOL_GPL(cec_notifier_get_conn); static void cec_notifier_release(struct kref *kref) { @@ -62,6 +66,7 @@ static void cec_notifier_release(struct kref *kref) container_of(kref, struct cec_notifier, kref); list_del(&n->head); + kfree(n->conn); kfree(n); } diff --git a/include/media/cec-notifier.h b/include/media/cec-notifier.h index cf0add7..814eeef 100644 --- a/include/media/cec-notifier.h +++ b/include/media/cec-notifier.h @@ -20,8 +20,10 @@ struct cec_notifier; #if IS_REACHABLE(CONFIG_CEC_CORE) && IS_ENABLED(CONFIG_CEC_NOTIFIER) /** - * cec_notifier_get - find or create a new cec_notifier for the given device. + * cec_notifier_get_conn - find or create a new cec_notifier for the given + * device and connector tuple. * @dev: device that sends the events. + * @conn: the connector name from which the event occurs * * If a notifier for device @dev already exists, then increase the refcount * and return that notifier. @@ -31,7 +33,8 @@ struct cec_notifier; * * Return NULL if the memory could not be allocated. */ -struct cec_notifier *cec_notifier_get(struct device *dev); +struct cec_notifier *cec_notifier_get_conn(struct device *dev, + const char *conn); /** * cec_notifier_put - decrease refcount and delete when the refcount reaches 0. @@ -85,7 +88,8 @@ void cec_register_cec_notifier(struct cec_adapter *adap, struct cec_notifier *notifier); #else -static inline struct cec_notifier *cec_notifier_get(struct device *dev) +static inline struct cec_notifier *cec_notifier_get_conn(struct device *dev, + const char *conn) { /* A non-NULL pointer is expected on success */ return (struct cec_notifier *)0xdeadfeed; @@ -121,6 +125,23 @@ static inline void cec_register_cec_notifier(struct cec_adapter *adap, #endif /** + * cec_notifier_get - find or create a new cec_notifier for the given device. + * @dev: device that sends the events. + * + * If a notifier for device @dev already exists, then increase the refcount + * and return that notifier. + * + * If it doesn't exist, then allocate a new notifier struct and return a + * pointer to that new struct. + * + * Return NULL if the memory could not be allocated. + */ +static inline struct cec_notifier *cec_notifier_get(struct device *dev) +{ + return cec_notifier_get_conn(dev, NULL); +} + +/** * cec_notifier_phys_addr_invalidate() - set the physical address to INVALID * * @n: the CEC notifier