From patchwork Mon Nov 30 13:31:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Scally X-Patchwork-Id: 334898 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62FCEC83027 for ; Mon, 30 Nov 2020 13:34:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11744207BC for ; Mon, 30 Nov 2020 13:34:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Q4yKKY0b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727031AbgK3Ndx (ORCPT ); Mon, 30 Nov 2020 08:33:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726992AbgK3NdV (ORCPT ); Mon, 30 Nov 2020 08:33:21 -0500 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C0EAC061A4F; Mon, 30 Nov 2020 05:32:14 -0800 (PST) Received: by mail-wm1-x334.google.com with SMTP id x22so18477112wmc.5; Mon, 30 Nov 2020 05:32:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rkRq171/EbhRrWzA9o1up4NODhQMUK0ZntCVybIjLcA=; b=Q4yKKY0bMW/qXTwUPcZS1H3nXE/o9694YGto0ZqiTaXFOHwzeyT+hly2Gslw6CGSG0 4XP5zn+SRkZXV4vVCFdZVv2q8g2XMj16Dlwo6mczblN67lrVrc/BUvxHGGS39KIPq13g Rg6SSKJYgTdPImBHQfbtffIPzCqXpKYuRJSPmvWwyIQMn7Nz7yGuKZu5J4GNOpMw2+dm 7S0VMEOKxt+wwREw4maVruKt6/tm5NcRIVu02XWO6Tmt3zoQ7jUS8/qGjvUFT5nlwzyq o6KMVy/9IKXXjiDhjGVtLzywKk8jYuOfq5AgKj27pBkPVj+QfNR7QTLTLko4wqd+fwTk EG2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rkRq171/EbhRrWzA9o1up4NODhQMUK0ZntCVybIjLcA=; b=TlOM2mNQ4SiWrURw035MnAW3hKLUnWaWtfaIP5gOjaxHERMK8ZsIq64Anlc3fVYc8G joWt+Pw+X0Zuusgb2aczmRKmL/7asBEvA8T1b9dRcoXU02HaE3tnjHweSs7GKLrDxZFY hfHCVEMJbrNQ1nIuRhFWmZfKmr8g81K5nycdbgn8Umz8zerLyybp5zn4/mkrk+qxO0FF pn8FxUCdoDqZqbs1LHbURHFAn9nnBEd2cEw1/uyA0+KHcZ/ANmrLUh1Eo5k2BER2eC69 H6EzDyM7OHyGjw2+ypQIieDEX/hEQW5Px9NnfHaMd0RRgk5AV/GpbP+Jm3gX03+wbLU9 YLJw== X-Gm-Message-State: AOAM533v2ZLxv6ZJTOg9hqBK9cMVC2LEQSrY9VK6ADRdXgdT9u3cIdYL vRVmnYedIC1CG90DzQO3KWd1QuKsz6CrbH5L X-Google-Smtp-Source: ABdhPJzPmRqy1SOVGB1510Z+u/UmLBQCc6UxCb0Na8Tvfr1paiJ2azTl1in4riIXMqk4aUYhk2k3QQ== X-Received: by 2002:a7b:cf08:: with SMTP id l8mr3361049wmg.189.1606743132058; Mon, 30 Nov 2020 05:32:12 -0800 (PST) Received: from valhalla.home ([2.31.224.80]) by smtp.gmail.com with ESMTPSA id g192sm7452333wme.48.2020.11.30.05.32.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 05:32:11 -0800 (PST) From: Daniel Scally To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, linux-media@vger.kernel.org, devel@acpica.org Cc: rjw@rjwysocki.net, lenb@kernel.org, gregkh@linuxfoundation.org, mika.westerberg@linux.intel.com, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, bgolaszewski@baylibre.com, wsa@kernel.org, yong.zhi@intel.com, sakari.ailus@linux.intel.com, bingbu.cao@intel.com, tian.shu.qiu@intel.com, mchehab@kernel.org, robert.moore@intel.com, erik.kaneda@intel.com, pmladek@suse.com, rostedt@goodmis.org, sergey.senozhatsky@gmail.com, linux@rasmusvillemoes.dk, kieran.bingham+renesas@ideasonboard.com, jacopo+renesas@jmondi.org, laurent.pinchart+renesas@ideasonboard.com, jorhand@linux.microsoft.com, kitakar@gmail.com, heikki.krogerus@linux.intel.com Subject: [PATCH 13/18] ipu3-cio2: Add functionality allowing software_node connections to sensors on platforms designed for Windows Date: Mon, 30 Nov 2020 13:31:24 +0000 Message-Id: <20201130133129.1024662-14-djrscally@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201130133129.1024662-1-djrscally@gmail.com> References: <20201130133129.1024662-1-djrscally@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Currently on platforms designed for Windows, connections between CIO2 and sensors are not properly defined in DSDT. This patch extends the ipu3-cio2 driver to compensate by building software_node connections, parsing the connection properties from the sensor's SSDB buffer. Suggested-by: Jordan Hand Signed-off-by: Daniel Scally --- Changes since RFC v3: - Removed almost all global variables, dynamically allocated the cio2_bridge structure, plus a bunch of associated changes like - Added a new function to ipu3-cio2-main.c to check for an existing fwnode_graph before calling cio2_bridge_init() - Prefixed cio2_bridge_ to any variables and functions that lacked it - Assigned the new fwnode directly to the sensor's ACPI device fwnode as secondary. This removes the requirement to delay until the I2C devices are instantiated before ipu3-cio2 can probe, but it has a side effect, which is that those devices then grab a ref to the new software_node. This effectively prevents us from unloading the driver, because we can't free the memory that they live in whilst the device holds a reference to them. The work around at the moment is to _not_ unregister the software_nodes when ipu3-cio2 is unloaded; this becomes a one-time 'patch', that is simply skipped if the module is reloaded. - Moved the sensor's SSDB struct to be a member of cio2_sensor - Replaced ints with unsigned ints where appropriate - Iterated over all ACPI devices of a matching _HID rather than just the first to ensure we handle a device with multiple sensors of the same model. MAINTAINERS | 1 + drivers/media/pci/intel/ipu3/Kconfig | 18 ++ drivers/media/pci/intel/ipu3/Makefile | 1 + drivers/media/pci/intel/ipu3/cio2-bridge.c | 260 ++++++++++++++++++ drivers/media/pci/intel/ipu3/cio2-bridge.h | 108 ++++++++ drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 27 ++ drivers/media/pci/intel/ipu3/ipu3-cio2.h | 6 + 7 files changed, 421 insertions(+) create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.c create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.h diff --git a/MAINTAINERS b/MAINTAINERS index 9702b886d6a4..188559a0a610 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8927,6 +8927,7 @@ INTEL IPU3 CSI-2 CIO2 DRIVER M: Yong Zhi M: Sakari Ailus M: Bingbu Cao +M: Dan Scally R: Tianshu Qiu L: linux-media@vger.kernel.org S: Maintained diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig index 82d7f17e6a02..2b3350d042be 100644 --- a/drivers/media/pci/intel/ipu3/Kconfig +++ b/drivers/media/pci/intel/ipu3/Kconfig @@ -16,3 +16,21 @@ config VIDEO_IPU3_CIO2 Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2 connected camera. The module will be called ipu3-cio2. + +config CIO2_BRIDGE + bool "IPU3 CIO2 Sensors Bridge" + depends on VIDEO_IPU3_CIO2 + help + This extension provides an API for the ipu3-cio2 driver to create + connections to cameras that are hidden in SSDB buffer in ACPI. It + can be used to enable support for cameras in detachable / hybrid + devices that ship with Windows. + + Say Y here if your device is a detachable / hybrid laptop that comes + with Windows installed by the OEM, for example: + + - Microsoft Surface models (except Surface Pro 3) + - The Lenovo Miix line (for example the 510, 520, 710 and 720) + - Dell 7285 + + If in doubt, say N here. diff --git a/drivers/media/pci/intel/ipu3/Makefile b/drivers/media/pci/intel/ipu3/Makefile index 429d516452e4..933777e6ea8a 100644 --- a/drivers/media/pci/intel/ipu3/Makefile +++ b/drivers/media/pci/intel/ipu3/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_VIDEO_IPU3_CIO2) += ipu3-cio2.o ipu3-cio2-y += ipu3-cio2-main.o +ipu3-cio2-$(CONFIG_CIO2_BRIDGE) += cio2-bridge.o diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c new file mode 100644 index 000000000000..fd3f8ba07274 --- /dev/null +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Author: Dan Scally */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "cio2-bridge.h" + +/* + * Extend this array with ACPI Hardware ID's of devices known to be working. + * Do not add a HID for a sensor that is not actually supported. + */ +static const char * const cio2_supported_devices[] = { + "INT33BE", + "OVTI2680", +}; + +static int cio2_bridge_read_acpi_buffer(struct acpi_device *adev, char *id, + void *data, u32 size) +{ + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + int ret; + + status = acpi_evaluate_object(adev->handle, id, NULL, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; + + obj = buffer.pointer; + if (!obj) { + dev_err(&adev->dev, "Couldn't locate ACPI buffer\n"); + return -ENODEV; + } + + if (obj->type != ACPI_TYPE_BUFFER) { + dev_err(&adev->dev, "Not an ACPI buffer\n"); + ret = -ENODEV; + goto out_free_buff; + } + + if (obj->buffer.length > size) { + dev_err(&adev->dev, "Given buffer is too small\n"); + ret = -EINVAL; + goto out_free_buff; + } + + memcpy(data, obj->buffer.pointer, obj->buffer.length); + ret = obj->buffer.length; + +out_free_buff: + kfree(buffer.pointer); + return ret; +} + +static void cio2_bridge_init_property_names(struct cio2_sensor *sensor) +{ + strcpy(sensor->prop_names.clock_frequency, "clock-frequency"); + strcpy(sensor->prop_names.rotation, "rotation"); + strcpy(sensor->prop_names.bus_type, "bus-type"); + strcpy(sensor->prop_names.data_lanes, "data-lanes"); + strcpy(sensor->prop_names.remote_endpoint, "remote-endpoint"); +} + +static void cio2_bridge_create_fwnode_properties(struct cio2_sensor *sensor) +{ + unsigned int i; + + cio2_bridge_init_property_names(sensor); + + for (i = 0; i < 4; i++) + sensor->data_lanes[i] = i + 1; + + /* + * Can't use PROPERTY_ENTRY_REF because it creates a new variable to + * point to, which doesn't survive the function. + */ + sensor->local_ref[0] = (struct software_node_ref_args){ + .node = &sensor->swnodes[SWNODE_CIO2_ENDPOINT] + }; + sensor->remote_ref[0] = (struct software_node_ref_args){ + .node = &sensor->swnodes[SWNODE_SENSOR_ENDPOINT] + }; + + sensor->dev_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.clock_frequency, + sensor->ssdb.mclkspeed); + sensor->dev_properties[1] = PROPERTY_ENTRY_U8(sensor->prop_names.rotation, + sensor->ssdb.degree); + + sensor->ep_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.bus_type, 5); + sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, + sensor->data_lanes, + sensor->ssdb.lanes); + sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, + sensor->local_ref); + + sensor->cio2_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, + sensor->data_lanes, + sensor->ssdb.lanes); + sensor->cio2_properties[1] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, + sensor->remote_ref); +} + +static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor) +{ + snprintf(sensor->node_names.remote_port, 6, "port%u", sensor->ssdb.link); + strcpy(sensor->node_names.port, "port0"); + strcpy(sensor->node_names.endpoint, "endpoint0"); +} + +static void cio2_bridge_create_connection_swnodes(struct cio2_bridge *bridge, + struct cio2_sensor *sensor) +{ + struct software_node *nodes = sensor->swnodes; + + cio2_bridge_init_swnode_names(sensor); + + nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name, + sensor->dev_properties); + nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port, + &nodes[SWNODE_SENSOR_HID]); + nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, + &nodes[SWNODE_SENSOR_PORT], + sensor->ep_properties); + nodes[SWNODE_CIO2_PORT] = NODE_PORT(sensor->node_names.remote_port, + &bridge->cio2_hid_node); + nodes[SWNODE_CIO2_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, + &nodes[SWNODE_CIO2_PORT], + sensor->cio2_properties); +} + +static void cio2_bridge_unregister_sensors(struct cio2_bridge *bridge) +{ + struct cio2_sensor *sensor; + unsigned int i; + + for (i = 0; i < bridge->n_sensors; i++) { + sensor = &bridge->sensors[i]; + software_node_unregister_nodes(sensor->swnodes); + acpi_dev_put(sensor->adev); + } +} + +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge) +{ + struct fwnode_handle *fwnode; + struct cio2_sensor *sensor; + struct acpi_device *adev; + unsigned int i; + int ret = 0; + + for (i = 0; i < ARRAY_SIZE(cio2_supported_devices); i++) { + const char *this_device = cio2_supported_devices[i]; + + for_each_acpi_dev_match(adev, this_device, NULL, -1) { + if (!adev || !(adev->status.present && adev->status.enabled)) + continue; + + sensor = &bridge->sensors[bridge->n_sensors]; + sensor->adev = adev; + strscpy(sensor->name, this_device, sizeof(sensor->name)); + + ret = cio2_bridge_read_acpi_buffer(adev, "SSDB", + &sensor->ssdb, + sizeof(sensor->ssdb)); + if (ret < 0) + goto err_put_adev; + + if (sensor->ssdb.lanes > 4) { + dev_err(&adev->dev, + "Number of lanes in SSDB is invalid\n"); + goto err_put_adev; + } + + cio2_bridge_create_fwnode_properties(sensor); + cio2_bridge_create_connection_swnodes(bridge, sensor); + + ret = software_node_register_nodes(sensor->swnodes); + if (ret) + goto err_put_adev; + + fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_SENSOR_HID]); + if (!fwnode) { + ret = -ENODEV; + goto err_free_swnodes; + } + + adev->fwnode.secondary = fwnode; + + dev_info(&bridge->cio2->dev, + "Found supported sensor %s\n", + acpi_dev_name(adev)); + + bridge->n_sensors++; + } + } + + return ret; + +err_free_swnodes: + software_node_unregister_nodes(sensor->swnodes); +err_put_adev: + acpi_dev_put(sensor->adev); + + return ret; +} + +int cio2_bridge_init(struct pci_dev *cio2) +{ + struct device *dev = &cio2->dev; + struct fwnode_handle *fwnode; + struct cio2_bridge *bridge; + int ret; + + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); + if (!bridge) + return -ENOMEM; + + strscpy(bridge->cio2_node_name, CIO2_HID, sizeof(bridge->cio2_node_name)); + bridge->cio2_hid_node = (const struct software_node){ bridge->cio2_node_name }; + bridge->cio2 = pci_dev_get(cio2); + + ret = software_node_register(&bridge->cio2_hid_node); + if (ret < 0) { + dev_err(dev, "Failed to register the CIO2 HID node\n"); + goto err_put_cio2; + } + + ret = cio2_bridge_connect_sensors(bridge); + if (ret || bridge->n_sensors == 0) + goto err_unregister_cio2; + + dev_info(dev, "Connected %d cameras\n", bridge->n_sensors); + + fwnode = software_node_fwnode(&bridge->cio2_hid_node); + if (!fwnode) { + dev_err(dev, "Error getting fwnode from cio2 software_node\n"); + ret = -ENODEV; + goto err_unregister_sensors; + } + + set_secondary_fwnode(dev, fwnode); + + return 0; + +err_unregister_sensors: + cio2_bridge_unregister_sensors(bridge); +err_unregister_cio2: + software_node_unregister(&bridge->cio2_hid_node); +err_put_cio2: + pci_dev_put(bridge->cio2); + + kfree(bridge); + return ret; +} diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.h b/drivers/media/pci/intel/ipu3/cio2-bridge.h new file mode 100644 index 000000000000..96f5c8a12be0 --- /dev/null +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.h @@ -0,0 +1,108 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Author: Dan Scally */ +#ifndef __CIO2_BRIDGE_H +#define __CIO2_BRIDGE_H + +#include + +#define CIO2_HID "INT343E" +#define CIO2_NUM_PORTS 4 + +#define NODE_SENSOR(_HID, _PROPS) \ + ((const struct software_node) { \ + .name = _HID, \ + .properties = _PROPS, \ + }) + +#define NODE_PORT(_PORT, _SENSOR_NODE) \ + ((const struct software_node) { \ + _PORT, \ + _SENSOR_NODE, \ + }) + +#define NODE_ENDPOINT(_EP, _PORT, _PROPS) \ + ((const struct software_node) { \ + _EP, \ + _PORT, \ + _PROPS, \ + }) + +enum cio2_sensor_swnodes { + SWNODE_SENSOR_HID, + SWNODE_SENSOR_PORT, + SWNODE_SENSOR_ENDPOINT, + SWNODE_CIO2_PORT, + SWNODE_CIO2_ENDPOINT, + NR_OF_SENSOR_SWNODES +}; + +/* Data representation as it is in ACPI SSDB buffer */ +struct cio2_sensor_ssdb { + u8 version; + u8 sku; + u8 guid_csi2[16]; + u8 devfunction; + u8 bus; + u32 dphylinkenfuses; + u32 clockdiv; + u8 link; + u8 lanes; + u32 csiparams[10]; + u32 maxlanespeed; + u8 sensorcalibfileidx; + u8 sensorcalibfileidxInMBZ[3]; + u8 romtype; + u8 vcmtype; + u8 platforminfo; + u8 platformsubinfo; + u8 flash; + u8 privacyled; + u8 degree; + u8 mipilinkdefined; + u32 mclkspeed; + u8 controllogicid; + u8 reserved1[3]; + u8 mclkport; + u8 reserved2[13]; +} __packed__; + +struct cio2_property_names { + char clock_frequency[16]; + char rotation[9]; + char bus_type[9]; + char data_lanes[11]; + char remote_endpoint[16]; +}; + +struct cio2_node_names { + char port[6]; + char endpoint[10]; + char remote_port[6]; +}; + +struct cio2_sensor { + char name[ACPI_ID_LEN]; + struct acpi_device *adev; + + struct software_node swnodes[6]; + struct cio2_node_names node_names; + + u32 data_lanes[4]; + struct cio2_sensor_ssdb ssdb; + struct cio2_property_names prop_names; + struct property_entry ep_properties[4]; + struct property_entry dev_properties[3]; + struct property_entry cio2_properties[3]; + struct software_node_ref_args local_ref[1]; + struct software_node_ref_args remote_ref[1]; +}; + +struct cio2_bridge { + struct pci_dev *cio2; + char cio2_node_name[ACPI_ID_LEN]; + struct software_node cio2_hid_node; + unsigned int n_sensors; + struct cio2_sensor sensors[CIO2_NUM_PORTS]; +}; + +#endif diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c index 36e354ecf71e..0d69b593e9f0 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c @@ -1702,6 +1702,22 @@ static void cio2_queues_exit(struct cio2_device *cio2) cio2_queue_exit(cio2, &cio2->queue[i]); } +static bool cio2_check_fwnode_graph(struct fwnode_handle *fwnode) +{ + struct fwnode_handle *endpoint; + + if (IS_ERR_OR_NULL(fwnode)) + return false; + + endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (endpoint) { + fwnode_handle_put(endpoint); + return true; + } + + return cio2_check_fwnode_graph(fwnode->secondary); +} + /**************** PCI interface ****************/ static int cio2_pci_probe(struct pci_dev *pci_dev, @@ -1715,6 +1731,17 @@ static int cio2_pci_probe(struct pci_dev *pci_dev, return -ENOMEM; cio2->pci_dev = pci_dev; + /* + * On some platforms no connections to sensors are defined in firmware, + * if the device has no endpoints then we can try to build those as + * software_nodes parsed from SSDB. + */ + if (!cio2_check_fwnode_graph(dev_fwnode(&pci_dev->dev))) { + r = cio2_bridge_init(pci_dev); + if (r) + return r; + } + r = pcim_enable_device(pci_dev); if (r) { dev_err(&pci_dev->dev, "failed to enable device (%d)\n", r); diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h index ccf0b85ae36f..520a27c9cdad 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h @@ -437,4 +437,10 @@ static inline struct cio2_queue *vb2q_to_cio2_queue(struct vb2_queue *vq) return container_of(vq, struct cio2_queue, vbq); } +#if IS_ENABLED(CONFIG_CIO2_BRIDGE) +int cio2_bridge_init(struct pci_dev *cio2); +#else +int cio2_bridge_init(struct pci_dev *cio2) { return 0; } +#endif + #endif