From patchwork Mon Jul 11 01:06:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 12912729 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F1765C43334 for ; Mon, 11 Jul 2022 01:06:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Tg9Jyi3qXMlq17WgVIF1diu9ZPFM+k85MVOKvHVmfKU=; b=D8uk/8x/zdj6h/ QMw7A6tLYvEBnPxFWisJ6+d7hYVWuwjEwSElpJDeR6EJ3GtLCHiTJVTdkbKCVwk8BW/DA3OYEzGXb 5wZwCM0/sYBBeUBlfNouxSTc6X0jZetnDWcTFcuwjXPTzzO8ICeHR4UuPiaTEpBXVNHuL99IyfG/j NsTvsuRaRqd0aQkvEnOUm49jeNjIrO23bKb4Clqhp+UUq05d+6d848vSxM/rbIA/9BvxcRifxvB76 m1EZxSrE0yCXdrveIra4fQ985UW8KzHF859oOVpyXsABXHkBVIUxxtYlCQCZjN2Lsxh87c7+VRg8+ +KUq+zEThL1hScRHtTEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAhsp-00EusK-Nu; Mon, 11 Jul 2022 01:06:43 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAhsm-00Euqk-Rs for linux-rockchip@lists.infradead.org; Mon, 11 Jul 2022 01:06:42 +0000 Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id ADA0225B; Mon, 11 Jul 2022 03:06:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1657501599; bh=rG85t3rz1wW1muKuj+6RfVfqLYXgQxGWuEEey9KFPP8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qPyC/tiI23r872RYV3D2EUpXuOGrCuWlY+JQPhxvqg7jlCyXn/JrAVe+wkCbquHFd ZjgqN4HvHoRq2TJnLlmvJ+d+K00qckgkR+HNWjjHc+Eetv+Uu1odeT4VukERglQBYl yEiw8NjpSj2R2w7MRqZ4rLLRMX9p9f1tQY9BexrI= From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: Dafna Hirschfeld , linux-rockchip@lists.infradead.org, Heiko Stuebner , Helen Koike , Paul Elder Subject: [PATCH v2.1 38/55] media: rkisp1: isp: Disallow multiple active sources Date: Mon, 11 Jul 2022 04:06:08 +0300 Message-Id: <20220711010608.1755-1-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220630230713.10580-39-laurent.pinchart@ideasonboard.com> References: <20220630230713.10580-39-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220710_180641_073554_04AAD00F X-CRM114-Status: GOOD ( 13.45 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org The ISP supports multiple source subdevs, but can only capture from a single one at a time. The source is selected through link setup. The driver finds the active source in its .s_stream() handler using the media_entity_remote_pad() function. This fails to reject invalid configurations with multiple active sources. Fix it by using the media_pad_remote_pad_unique() helper instead, and inline rkisp1_isp_get_source() in rkisp1_isp_s_stream() as the function is small and has a single caller. Signed-off-by: Laurent Pinchart Reviewed-by: Paul Elder --- Changes since v2: - Update media_pad_remote_pad_unique() function name in commit message --- .../platform/rockchip/rkisp1/rkisp1-isp.c | 30 ++++++++----------- 1 file changed, 13 insertions(+), 17 deletions(-) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c index 37623b73b1d9..d7e2802d11f5 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c @@ -58,20 +58,6 @@ * Helpers */ -static struct v4l2_subdev *rkisp1_isp_get_source(struct v4l2_subdev *sd) -{ - struct media_pad *local, *remote; - struct media_entity *sensor_me; - - local = &sd->entity.pads[RKISP1_ISP_PAD_SINK_VIDEO]; - remote = media_pad_remote_pad_first(local); - if (!remote) - return NULL; - - sensor_me = remote->entity; - return media_entity_to_v4l2_subdev(sensor_me); -} - static struct v4l2_mbus_framefmt * rkisp1_isp_get_pad_fmt(struct rkisp1_isp *isp, struct v4l2_subdev_state *sd_state, @@ -743,6 +729,8 @@ static int rkisp1_isp_s_stream(struct v4l2_subdev *sd, int enable) struct rkisp1_isp *isp = to_rkisp1_isp(sd); struct rkisp1_device *rkisp1 = isp->rkisp1; const struct rkisp1_sensor_async *asd; + struct media_pad *source_pad; + struct media_pad *sink_pad; int ret; if (!enable) { @@ -754,10 +742,18 @@ static int rkisp1_isp_s_stream(struct v4l2_subdev *sd, int enable) return 0; } - rkisp1->source = rkisp1_isp_get_source(sd); + sink_pad = &isp->pads[RKISP1_ISP_PAD_SINK_VIDEO]; + source_pad = media_pad_remote_pad_unique(sink_pad); + if (IS_ERR(source_pad)) { + dev_dbg(rkisp1->dev, "Failed to get source for ISP: %ld\n", + PTR_ERR(source_pad)); + return -EPIPE; + } + + rkisp1->source = media_entity_to_v4l2_subdev(source_pad->entity); if (!rkisp1->source) { - dev_warn(rkisp1->dev, "No link between isp and source\n"); - return -ENODEV; + /* This should really not happen, so is not worth a message. */ + return -EPIPE; } asd = container_of(rkisp1->source->asd, struct rkisp1_sensor_async,