From patchwork Sat Sep 24 15:33:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 608904 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 7FE14C6FA8E for ; Sat, 24 Sep 2022 15:33:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233942AbiIXPdn (ORCPT ); Sat, 24 Sep 2022 11:33:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233941AbiIXPdf (ORCPT ); Sat, 24 Sep 2022 11:33:35 -0400 Received: from relay10.mail.gandi.net (relay10.mail.gandi.net [IPv6:2001:4b98:dc4:8::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13BFBB56E6; Sat, 24 Sep 2022 08:33:27 -0700 (PDT) Received: (Authenticated sender: paul.kocialkowski@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 4F4B5240009; Sat, 24 Sep 2022 15:33:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1664033606; 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=4GiWn6/vCDTKRkhhkK6F1hPUXTYYUMDoGhjDkVc/pSI=; b=N41dsPcgPv6eS7c9qet350sLD1PyGUDYPGanLDXUBNVgEz2NmTwPXJRCkxwRdy9ooWWATz Uwg2GBzW0oQW7BZ6kd+KNCQrNa4t8RMis+JUeRT1bjamonGCuVDKl8Ten4fBrnNF2Gm3+o TSJxBKxRpHbDUABwpoNcTJ0Yw57PRfC1P801TXohg0tlYE4exlOcNSnO+XKgn9vgQ3zles 1A1uGoRJsyKSowFfkwiokpD2KODf55IfWp/usJonovV4zwwsND+QXjerhg+UUdl6xZ1p/4 CEtgbhvYWu6wkSqE6rFAK/6mdm9h5Y7J6bRB3m0V42VxSFtwQd7yJ5qUKnq1Bw== 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 v7 5/6] media: sun6i-csi: Detect the availability of the ISP Date: Sat, 24 Sep 2022 17:33:03 +0200 Message-Id: <20220924153304.77598-6-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220924153304.77598-1-paul.kocialkowski@bootlin.com> References: <20220924153304.77598-1-paul.kocialkowski@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add a helper to detect whether the ISP is available and connected and store the indication in the driver-specific device structure. Signed-off-by: Paul Kocialkowski --- .../platform/sunxi/sun6i-csi/sun6i_csi.c | 34 +++++++++++++++++++ .../platform/sunxi/sun6i-csi/sun6i_csi.h | 3 ++ 2 files changed, 37 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..046fc9d018eb 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -24,6 +24,36 @@ #include "sun6i_csi_capture.h" #include "sun6i_csi_reg.h" +/* ISP */ + +static int sun6i_csi_isp_detect(struct sun6i_csi_device *csi_dev) +{ + struct device *dev = csi_dev->dev; + struct fwnode_handle *handle; + + /* + * ISP is not available if not connected via fwnode graph. + * This will 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); + + if (!IS_ENABLED(CONFIG_VIDEO_SUN6I_ISP)) { + dev_warn(dev, + "ISP link is detected but not enabled in kernel config!"); + return 0; + } + + csi_dev->isp_available = true; + + return 0; +} + /* Media */ static const struct media_device_ops sun6i_csi_media_ops = { @@ -290,6 +320,10 @@ 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 {