From patchwork Tue Mar 10 11:06:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lad Prabhakar X-Patchwork-Id: 11429145 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7CAC514E3 for ; Tue, 10 Mar 2020 11:06:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 672F524696 for ; Tue, 10 Mar 2020 11:06:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726446AbgCJLGo (ORCPT ); Tue, 10 Mar 2020 07:06:44 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:25631 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726269AbgCJLGo (ORCPT ); Tue, 10 Mar 2020 07:06:44 -0400 X-IronPort-AV: E=Sophos;i="5.70,536,1574089200"; d="scan'208";a="41493390" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 10 Mar 2020 20:06:43 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 85C74420C2EB; Tue, 10 Mar 2020 20:06:41 +0900 (JST) From: Lad Prabhakar To: Mauro Carvalho Chehab , Niklas Cc: linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Lad Prabhakar , Lad Prabhakar Subject: [PATCH v2 1/3] media: rcar-csi2: Add support to match fwnode against remote or parent port Date: Tue, 10 Mar 2020 11:06:02 +0000 Message-Id: <1583838364-12932-2-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583838364-12932-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <1583838364-12932-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The rcar-csi2 driver uses the v4l2-async framework to do endpoint matching instead of node matching. This is needed as it needs to work with the adv748x driver which register it self in v4l2-async using endpoints instead of nodes. The reason for this is that from a single DT node it creates multiple subdevices, one for each endpoint. But when using subdevs which register itself in v4l2-async using nodes, the rcar-csi2 driver failed to find the matching endpoint because the match.fwnode was pointing to remote endpoint instead of remote parent port. This commit adds support in rcar-csi2 driver to handle both the cases where subdev registers in v4l2-async using endpoints/nodes, by using match_type as V4L2_ASYNC_MATCH_CUSTOM and implementing the match() callback to compare the fwnode of either remote/parent. Signed-off-by: Lad Prabhakar --- drivers/media/platform/rcar-vin/rcar-csi2.c | 41 ++++++++++++++++++++++++++--- 1 file changed, 38 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c index faa9fb2..39e1639 100644 --- a/drivers/media/platform/rcar-vin/rcar-csi2.c +++ b/drivers/media/platform/rcar-vin/rcar-csi2.c @@ -808,6 +808,41 @@ static int rcsi2_parse_v4l2(struct rcar_csi2 *priv, return 0; } +static bool rcsi2_asd_match(struct device *dev, + struct v4l2_async_subdev *async_sd) +{ + struct rcar_csi2 *priv = (struct rcar_csi2 *) + async_sd->match.custom.priv; + struct fwnode_handle *endpoint; + struct fwnode_handle *remote; + struct fwnode_handle *parent; + struct device_node *np; + bool matched = false; + + np = of_graph_get_endpoint_by_regs(priv->dev->of_node, 0, 0); + if (!np) { + dev_err(priv->dev, "Not connected to subdevice\n"); + return -EINVAL; + } + + endpoint = of_fwnode_handle(np); + remote = fwnode_graph_get_remote_endpoint(endpoint); + parent = fwnode_graph_get_remote_port_parent(endpoint); + if (parent) { + if (parent == dev->fwnode || + parent == &dev->of_node->fwnode) + matched = true; + } else if (remote && !matched) { + if (remote == dev->fwnode || + remote == &dev->of_node->fwnode) + matched = true; + } + + of_node_put(np); + + return matched; +} + static int rcsi2_parse_dt(struct rcar_csi2 *priv) { struct device_node *ep; @@ -833,9 +868,9 @@ static int rcsi2_parse_dt(struct rcar_csi2 *priv) return ret; } - priv->asd.match.fwnode = - fwnode_graph_get_remote_endpoint(of_fwnode_handle(ep)); - priv->asd.match_type = V4L2_ASYNC_MATCH_FWNODE; + priv->asd.match.custom.match = &rcsi2_asd_match; + priv->asd.match.custom.priv = priv; + priv->asd.match_type = V4L2_ASYNC_MATCH_CUSTOM; of_node_put(ep);