From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay10.mail.gandi.net (relay10.mail.gandi.net [217.70.178.230]) (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 139472C9D; Sat, 5 Feb 2022 18:56:19 +0000 (UTC) Received: (Authenticated sender: paul.kocialkowski@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 0175A240002; Sat, 5 Feb 2022 18:56:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1644087378; 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=majeYqv001Hk/JLaXWth7OAGgt7K7pFuA9tBX2AQZdA=; b=abPysJQbp5jULxHX49048PYYBx4305nxRe5w5u+VzfslzR2LiQA83/qY67Eq4h8C67wpwA uxTAjeZvzPPuZvb7U/q0QmONjb5Mw2Ry2xiyGOlABIKzeN1DdSUHlYTA+TKHbmfvsAmnUB QMVIj8AMCDX+VcXHM2LRzwW+mZMzi6DE6EbEUmjbHL2kR0UNV0YKNZLF7k0bAQzR5LRTnn JM62yWhFlqv9uNgnImYII7167XJiepzIzHPXq8vTzPyIyKur6SjJQ0No8vpKjFd4RiGm0u laqRZILqkcha5m7G2Y3QcQTJZWtUyQOWrvw3VoKJ1jMN7GaG/mKjDYPwTWbmDw== 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-phy@lists.infradead.org, linux-clk@vger.kernel.org, linux-staging@lists.linux.dev Cc: Yong Deng , Mauro Carvalho Chehab , Rob Herring , Maxime Ripard , Sakari Ailus , Hans Verkuil , Chen-Yu Tsai , Jernej Skrabec , Paul Kocialkowski , Greg Kroah-Hartman , Helen Koike , Laurent Pinchart , Thomas Petazzoni Subject: [PATCH v2 58/66] media: sun6i-csi: Detect the availability of the ISP Date: Sat, 5 Feb 2022 19:54:21 +0100 Message-Id: <20220205185429.2278860-59-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220205185429.2278860-1-paul.kocialkowski@bootlin.com> References: <20220205185429.2278860-1-paul.kocialkowski@bootlin.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 b8e925f6bc09..70b2a8b95b40 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 = { @@ -328,6 +357,10 @@ 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 3c08b2712215..6cdaf98dc295 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h @@ -22,6 +22,7 @@ enum sun6i_csi_port { SUN6I_CSI_PORT_PARALLEL = 0, SUN6I_CSI_PORT_MIPI_CSI2 = 1, + SUN6I_CSI_PORT_ISP = 2, }; struct sun6i_csi_buffer { @@ -47,6 +48,8 @@ struct sun6i_csi_device { struct clk *clk_mod; struct clk *clk_ram; struct reset_control *reset; + + bool isp_available; }; /* V4L2 */ -- 2.34.1