From patchwork Wed May 25 19:10:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 577136 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F092BC433F5 for ; Wed, 25 May 2022 19:14:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240028AbiEYTOW (ORCPT ); Wed, 25 May 2022 15:14:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44686 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344426AbiEYTNn (ORCPT ); Wed, 25 May 2022 15:13:43 -0400 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17C3724598; Wed, 25 May 2022 12:11:28 -0700 (PDT) Received: (Authenticated sender: paul.kocialkowski@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 73F41FF805; Wed, 25 May 2022 19:10:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1653505841; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fD3BO/j67l9HqtMkYAqdXitbbV2fhX6yvbmEUse4WKw=; b=oJXIxMrwuARH7NhkRxPm5HBcVr/w9NjpEcQNSvu6zq4c3aCjc9/v+ZZIHmkcUmzGAfivlG 8AFFOvGGKI3ZBLxw2XYVxTHT9vcMDOrAKSwl/X+PbOjFcLNkpMddpUysTtOazUP9zLno1d LIcyP4gExKWouXGBkGjrzyhdsyRX/JjKvs3JjCM1dfuG1qxB2vvzmQil41tZ/uHn/NTczb 9IxMLWXGrc9YdstoVWaVCZHQiBn0x3pjrMpOFeYY+j4h3dVAWrSuuArStQT0R5KTbeFYVz 8ULPZ/YF5fsyhXZhPDNNGl0B0Vw12BvhawC4eXsrr0PaEHzc2nN/24JtG+pvLA== From: Paul Kocialkowski To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev Cc: Paul Kocialkowski , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Sakari Ailus , Hans Verkuil , Laurent Pinchart , Maxime Ripard , Thomas Petazzoni Subject: [PATCH v4 5/6] media: sun6i-csi: Detect the availability of the ISP Date: Wed, 25 May 2022 21:10:25 +0200 Message-Id: <20220525191026.696636-6-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220525191026.696636-1-paul.kocialkowski@bootlin.com> References: <20220525191026.696636-1-paul.kocialkowski@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add a helper to detect whether the ISP is available and connected and store the indication in a driver-wide variable. Signed-off-by: Paul Kocialkowski --- .../platform/sunxi/sun6i-csi/sun6i_csi.c | 33 +++++++++++++++++++ .../platform/sunxi/sun6i-csi/sun6i_csi.h | 3 ++ 2 files changed, 36 insertions(+) diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index 00521f966cee..b16166cba2ef 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -24,6 +24,35 @@ #include "sun6i_csi_capture.h" #include "sun6i_csi_reg.h" +/* ISP */ + +static bool sun6i_csi_isp_detect(struct sun6i_csi_device *csi_dev) +{ + struct device *dev = csi_dev->dev; + struct fwnode_handle *handle = NULL; + + /* ISP is not available if disabled in kernel config. */ + if (!IS_ENABLED(CONFIG_VIDEO_SUN6I_ISP)) + return 0; + + /* + * ISP is not available if not connected via fwnode graph. + * This weill also check that the remote parent node is available. + */ + handle = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), + SUN6I_CSI_PORT_ISP, 0, + FWNODE_GRAPH_ENDPOINT_NEXT); + if (!handle) + return 0; + + fwnode_handle_put(handle); + + dev_info(dev, "ISP link is available\n"); + csi_dev->isp_available = true; + + return 0; +} + /* Media */ static const struct media_device_ops sun6i_csi_media_ops = { @@ -290,6 +319,10 @@ static int sun6i_csi_probe(struct platform_device *platform_dev) if (ret) return ret; + ret = sun6i_csi_isp_detect(csi_dev); + if (ret) + goto error_resources; + ret = sun6i_csi_v4l2_setup(csi_dev); if (ret) goto error_resources; diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h index e611bdd6e9b2..8e232cd91ebe 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h @@ -21,6 +21,7 @@ enum sun6i_csi_port { SUN6I_CSI_PORT_PARALLEL = 0, SUN6I_CSI_PORT_MIPI_CSI2 = 1, + SUN6I_CSI_PORT_ISP = 2, }; struct sun6i_csi_buffer { @@ -44,6 +45,8 @@ struct sun6i_csi_device { struct clk *clock_mod; struct clk *clock_ram; struct reset_control *reset; + + bool isp_available; }; struct sun6i_csi_variant {