From patchwork Wed Oct 9 01:44:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuninori Morimoto X-Patchwork-Id: 13827371 Received: from TYVP286CU001.outbound.protection.outlook.com (mail-japaneastazon11011056.outbound.protection.outlook.com [52.101.125.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 40D421D69E; Wed, 9 Oct 2024 01:44:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.125.56 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728438295; cv=fail; b=lV1Ss65tOeJarN32KliILV4F+zKypix8mhvsxUKOI6mD38Of3Dup26H/v8DFqVQznIlLf+2e7HI04wcunMyDnhALZ34brRenbX9cxoFbre6SMFdYyWSFVV4ZlzBgv8+4rabVOcDgNPmqLbj2c8jqhlQcdOsiCacDDQzBCk/fDXo= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728438295; c=relaxed/simple; bh=PqYAW5u12Pijloz/G0d1lVBXUhFxgnrIUYX8HtZJKKc=; h=Message-ID:From:Subject:To:In-Reply-To:References:Content-Type: Date:MIME-Version; b=PPPdEhi9dA3iLvrgtLfCAunfANXEW2Zo6/GC26SzKsp2pz5Ru1KQKzSI4N/W5nm5Eda42f7g8QsymQ6kp1SyKyBXIj1d4+qEAx0I5FvHFzEf+35XYLR/VMybQpdEqTMh5CRHCPSV0e6ID3oAtRxSPXwgcgLrqAhAjafe29/FbMo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; dkim=pass (1024-bit key) header.d=renesas.com header.i=@renesas.com header.b=lNVGoDj9; arc=fail smtp.client-ip=52.101.125.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=renesas.com header.i=@renesas.com header.b="lNVGoDj9" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=E5HKtOMySErihMIfENmnURQ+d51HeBk6daLdGKAn/emfY1TWKMokA5utqdDeCmEtI+JstRIgn34lRkergugUo/I9BOpibNX7Bltk7GSAkZ0TAVeppfY+OqZcIKeo737J3r3/2pb+J2miHkpjfiPxhaVHNouxrfx/lH1t5ClPDRyABOeFZPD9RgGhthqBI4lP/Lckng5Q5He6I/hPVTeDjAgU5Ds/4u3lyPZJXmdN6wI6LQCDl2GkNgtD/3LX26jaX/bL8wS60K11xmBbX0Fyu1chvtCvOSqOerE1htXXBA3tNG84Ui/RSM/HK9NQ4/Q0QyMbdMl+Jrgx9nymf+h8eQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=lGjZIhB+elB0dqTsvRysDjB811MCxqKaJeFpHJ6knI0=; b=KShvQ7GFjpZv78XWq4grdDd7rLotoI9SXO+GsQoXo+zd4S5x5SO7ra9JsZg2sygxnmYqoM+64tzkiQOyTsPXhWNxMxrztAg/eztC/dgCj2946xCgO1otaJB8EzghX8ggHvqhd8SMsUXP7lO449wigeFZCbYIY3Pq2bVZsAs1AynPvdfIhLkjprYUDVrsV+Miw0RhAuaY6BOHbIBJ7tv1pOSOElxgYsL+nBj+pxhuGjeEAItKDVwmgrt/lLzNXKzs3frQtvI6zlODfeFxp5zblsznS0S7e2ouEHFA6S+uZDxOzOfyiRvXnDoq0WhPYBZo0eC+aMtuzGkilvet9Y1d5A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=renesas.com; dmarc=pass action=none header.from=renesas.com; dkim=pass header.d=renesas.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=renesas.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lGjZIhB+elB0dqTsvRysDjB811MCxqKaJeFpHJ6knI0=; b=lNVGoDj9sjJ0mXWdVLjsoyvwMZo5S1ssZAV3S8MihiYi9OGwtmQWV/a36Vz2NMf7QSJ43mUfG4kfVMrODLS8GjmPnrGsqXh8M8unjmCHVyhm9DBIFsEntA+r492soVNbMqRSErJ/AtqvQtXjvHB2yULXv86SWHu1TtVkSpVXsPk= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=renesas.com; Received: from TYCPR01MB10914.jpnprd01.prod.outlook.com (2603:1096:400:3a9::11) by TYCPR01MB11140.jpnprd01.prod.outlook.com (2603:1096:400:3df::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8048.16; Wed, 9 Oct 2024 01:44:49 +0000 Received: from TYCPR01MB10914.jpnprd01.prod.outlook.com ([fe80::c568:1028:2fd1:6e11]) by TYCPR01MB10914.jpnprd01.prod.outlook.com ([fe80::c568:1028:2fd1:6e11%4]) with mapi id 15.20.8026.020; Wed, 9 Oct 2024 01:44:49 +0000 Message-ID: <87v7y2rqwf.wl-kuninori.morimoto.gx@renesas.com> From: Kuninori Morimoto Subject: [PATCH v7 1/9] of: property: add of_graph_get_next_port() User-Agent: Wanderlust/2.15.9 Emacs/29.3 Mule/6.0 To: Daniel Vetter , David Airlie , Helge Deller , Jaroslav Kysela , Laurent Pinchart , Liam Girdwood , Maarten Lankhorst , Mark Brown , Mauro Carvalho Chehab , Maxime Ripard , Michal Simek , Rob Herring , Saravana Kannan , Takashi Iwai , Thomas Zimmermann , Tomi Valkeinen , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-media@vger.kernel.org, linux-omap@vger.kernel.org, linux-sound@vger.kernel.org, Sakari Ailus In-Reply-To: <87wmiirqwy.wl-kuninori.morimoto.gx@renesas.com> References: <87wmiirqwy.wl-kuninori.morimoto.gx@renesas.com> Date: Wed, 9 Oct 2024 01:44:48 +0000 X-ClientProxiedBy: TYCP286CA0180.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:3c6::13) To TYCPR01MB10914.jpnprd01.prod.outlook.com (2603:1096:400:3a9::11) Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TYCPR01MB10914:EE_|TYCPR01MB11140:EE_ X-MS-Office365-Filtering-Correlation-Id: d190d650-d59e-418a-690e-08dce803f60f X-LD-Processed: 53d82571-da19-47e4-9cb4-625a166a4a2a,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|52116014|7416014|376014|921020|38350700014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:TYCPR01MB10914.jpnprd01.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(52116014)(7416014)(376014)(921020)(38350700014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: renesas.com X-MS-Exchange-CrossTenant-Network-Message-Id: d190d650-d59e-418a-690e-08dce803f60f X-MS-Exchange-CrossTenant-AuthSource: TYCPR01MB10914.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2024 01:44:49.1597 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 53d82571-da19-47e4-9cb4-625a166a4a2a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: SKIAV+4aaRLeuDdElsJt2Haw31KNbuQfTMM6omgI3L8K7aWGb4XUSzGgK5nAaQk6qUwhKLTQBY3u1S3bi57XsUomMe2vISdTJW1REN7123465xEmdoHVn0xeOhLq3GkO X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYCPR01MB11140 We have endpoint base functions - of_graph_get_next_endpoint() - of_graph_get_endpoint_count() - for_each_endpoint_of_node() Here, for_each_endpoint_of_node() loop finds each endpoints ports { port@0 { (1) endpoint {...}; }; port@1 { (2) endpoint {...}; }; ... }; In above case, it finds endpoint as (1) -> (2) -> ... Basically, user/driver knows which port is used for what, but not in all cases. For example on flexible/generic driver case, how many ports are used is not fixed. For example Sound Generic Card driver which is very flexible/generic and used from many venders can't know how many ports are used, and used for what, because it depends on each vender SoC and/or its used board. And more, the port can have multi endpoints. For example Generic Sound Card case, it supports many type of connection between CPU / Codec, and some of them uses multi endpoint in one port. see below. ports { (A) port@0 { (1) endpoint@0 {...}; (2) endpoint@1 {...}; }; (B) port@1 { (3) endpoint {...}; }; ... }; Generic Sound Card want to handle each connection via "port" base instead of "endpoint" base. But, it is very difficult to handle each "port" via existing for_each_endpoint_of_node(). Because getting each "port" via of_get_parent() from each "endpoint" doesn't work. For example in above case, both (1) (2) endpoint has same "port" (= A). Add "port" base functions. Signed-off-by: Kuninori Morimoto --- drivers/of/property.c | 54 ++++++++++++++++++++++++++++++++++++++++ include/linux/of_graph.h | 28 +++++++++++++++++++++ 2 files changed, 82 insertions(+) diff --git a/drivers/of/property.c b/drivers/of/property.c index 11b922fde7af..6a5d27dd0c64 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -630,6 +630,43 @@ struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id) } EXPORT_SYMBOL(of_graph_get_port_by_id); +/** + * of_graph_get_next_port() - get next port node. + * @parent: pointer to the parent device node, or parent ports node + * @prev: previous port node, or NULL to get first + * + * Parent device node can be used as @parent whether device node has ports node or not. + * It will work same as ports@0 node. + * + * Return: A 'port' node pointer with refcount incremented. Refcount + * of the passed @prev node is decremented. + */ +struct device_node *of_graph_get_next_port(const struct device_node *parent, + struct device_node *prev) +{ + if (!parent) + return NULL; + + if (!prev) { + struct device_node *node __free(device_node) = + of_get_child_by_name(parent, "ports"); + + if (node) + parent = node; + + return of_get_child_by_name(parent, "port"); + } + + do { + prev = of_get_next_child(parent, prev); + if (!prev) + break; + } while (!of_node_name_eq(prev, "port")); + + return prev; +} +EXPORT_SYMBOL(of_graph_get_next_port); + /** * of_graph_get_next_endpoint() - get next endpoint node * @parent: pointer to the parent device node @@ -823,6 +860,23 @@ unsigned int of_graph_get_endpoint_count(const struct device_node *np) } EXPORT_SYMBOL(of_graph_get_endpoint_count); +/** + * of_graph_get_port_count() - get the number of port in a device or ports node + * @np: pointer to the device or ports node + * + * Return: count of port of this device or ports node + */ +unsigned int of_graph_get_port_count(struct device_node *np) +{ + unsigned int num = 0; + + for_each_of_graph_port(np, port) + num++; + + return num; +} +EXPORT_SYMBOL(of_graph_get_port_count); + /** * of_graph_get_remote_node() - get remote parent device_node for given port/endpoint * @node: pointer to parent device_node containing graph port/endpoint diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h index a4bea62bfa29..44518f3583a4 100644 --- a/include/linux/of_graph.h +++ b/include/linux/of_graph.h @@ -11,6 +11,7 @@ #ifndef __LINUX_OF_GRAPH_H #define __LINUX_OF_GRAPH_H +#include #include #include @@ -37,14 +38,29 @@ struct of_endpoint { for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \ child = of_graph_get_next_endpoint(parent, child)) +/** + * for_each_of_graph_port - iterate over every port in a device or ports node + * @parent: parent device or ports node containing port + * @child: loop variable pointing to the current port node + * + * When breaking out of the loop, and continue to use the @child, you need to + * use return_ptr(@child) or no_free_ptr(@child) not to call __free() for it. + */ +#define for_each_of_graph_port(parent, child) \ + for (struct device_node *child __free(device_node) = of_graph_get_next_port(parent, NULL);\ + child != NULL; child = of_graph_get_next_port(parent, child)) + #ifdef CONFIG_OF bool of_graph_is_present(const struct device_node *node); int of_graph_parse_endpoint(const struct device_node *node, struct of_endpoint *endpoint); unsigned int of_graph_get_endpoint_count(const struct device_node *np); +unsigned int of_graph_get_port_count(struct device_node *np); struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, struct device_node *previous); +struct device_node *of_graph_get_next_port(const struct device_node *parent, + struct device_node *port); struct device_node *of_graph_get_endpoint_by_regs( const struct device_node *parent, int port_reg, int reg); struct device_node *of_graph_get_remote_endpoint( @@ -73,6 +89,11 @@ static inline unsigned int of_graph_get_endpoint_count(const struct device_node return 0; } +static inline unsigned int of_graph_get_port_count(struct device_node *np) +{ + return 0; +} + static inline struct device_node *of_graph_get_port_by_id( struct device_node *node, u32 id) { @@ -86,6 +107,13 @@ static inline struct device_node *of_graph_get_next_endpoint( return NULL; } +static inline struct device_node *of_graph_get_next_port( + const struct device_node *parent, + struct device_node *previous) +{ + return NULL; +} + static inline struct device_node *of_graph_get_endpoint_by_regs( const struct device_node *parent, int port_reg, int reg) {