From patchwork Wed Mar 29 10:09:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668764 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 E19E8C77B60 for ; Wed, 29 Mar 2023 10:10:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231453AbjC2KKB (ORCPT ); Wed, 29 Mar 2023 06:10:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231514AbjC2KKA (ORCPT ); Wed, 29 Mar 2023 06:10:00 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 565A919A; Wed, 29 Mar 2023 03:09:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084599; x=1711620599; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Bgz28ewbRcBG6cgmyNwmPI2DHGuZZdE2Xqakl+AkmbI=; b=FGXwCeVadF37YB3ynR+WPrJ7iMs3VDe4pLlZqiT8gwGVXupA0vBJ/ojP 6H9xggdOB5ya06HrcDaPk79lTEIPAftZzeg4z9rSTaBcChWOVXT8gyj4E UULeTddLVpc7po5V9CzG+A/LhPcXzVfPJ2UEEaIl75O/z14DrgJrVF/Vf HJ82ZtiS/DBldscnGlYsWrhrcWxX3Glws5YyFHNroIQdD+HV5gOrABbfh n2BQGN5pnZl7aZqaxN9mMhF6tAVuZNmnPBANrWGbeSrYcTm22k3rS50l0 H5zVlVT1zlrWplEkHYm7iGjt3pIXuCFm8CbukChz+NfJkU/cEWwKSgr7w Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256224" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256224" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517704" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517704" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:56 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 88B8D12259B; Wed, 29 Mar 2023 13:09:53 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 01/10] ACPI: scan: Remove the second DSDT traversal Date: Wed, 29 Mar 2023 13:09:42 +0300 Message-Id: <20230329100951.1522322-2-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Collect the devices with _DEP into a list and continue processing them after a full traversal, instead of doing a full second traversal of the tree. This makes the second DSDT traversal pass unnecessary as we already have the nodes we're interested in in a linked list. Signed-off-by: Sakari Ailus Signed-off-by: Rafael J. Wysocki --- drivers/acpi/scan.c | 125 ++++++++++++++++++++++++++++++++------------ 1 file changed, 92 insertions(+), 33 deletions(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 0c6f06abe3f4..280d12e0aa2f 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2029,10 +2029,52 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) return count; } -static bool acpi_bus_scan_second_pass; +/** + * struct acpi_postponed_handle - A postponed ACPI handle + * @list: Entry in a postponed list + * @handle: The postponed handle + * + * One such entry represents an ACPI handle the scanning of which has been + * postponed. + */ +struct acpi_postponed_handle { + struct list_head list; + acpi_handle handle; +}; + +/** + * struct acpi_scan_context - Context for scanning ACPI devices + * @postponed_head: The list head of the postponed ACPI handles + * @device: The first encountered device, typically the root of the scanned tree + */ +struct acpi_scan_context { + struct list_head postponed_head; + struct acpi_device *device; +}; + +/** + * acpi_bus_handle_postpone - Add an ACPI handle to a given postponed list + * @handle: The ACPI handle + * @head: Postponed list head + * + * Add a given ACPI handle to a list of ACPI objects for which the creation + * of the device objects is to be postponed. + */ +static void acpi_bus_handle_postpone(acpi_handle handle, + struct list_head *head) +{ + struct acpi_postponed_handle *ph; + + ph = kzalloc(sizeof(*ph), GFP_KERNEL); + if (!ph) + return; + + ph->handle = handle; + list_add(&ph->list, head); +} static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, - struct acpi_device **adev_p) + struct acpi_scan_context *ctx) { struct acpi_device *device = acpi_fetch_acpi_dev(handle); acpi_object_type acpi_type; @@ -2051,7 +2093,7 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, /* Bail out if there are dependencies. */ if (acpi_scan_check_dep(handle, check_dep) > 0) { - acpi_bus_scan_second_pass = true; + acpi_bus_handle_postpone(handle, &ctx->postponed_head); return AE_CTRL_DEPTH; } @@ -2086,22 +2128,22 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, acpi_scan_init_hotplug(device); out: - if (!*adev_p) - *adev_p = device; + if (!ctx->device) + ctx->device = device; return AE_OK; } static acpi_status acpi_bus_check_add_1(acpi_handle handle, u32 lvl_not_used, - void *not_used, void **ret_p) + void *ctx, void **unused) { - return acpi_bus_check_add(handle, true, (struct acpi_device **)ret_p); + return acpi_bus_check_add(handle, true, (struct acpi_scan_context *)ctx); } static acpi_status acpi_bus_check_add_2(acpi_handle handle, u32 lvl_not_used, - void *not_used, void **ret_p) + void *ctx, void **device) { - return acpi_bus_check_add(handle, false, (struct acpi_device **)ret_p); + return acpi_bus_check_add(handle, false, (struct acpi_scan_context *)ctx); } static void acpi_default_enumeration(struct acpi_device *device) @@ -2422,37 +2464,54 @@ EXPORT_SYMBOL_GPL(acpi_dev_get_next_consumer_dev); */ int acpi_bus_scan(acpi_handle handle) { - struct acpi_device *device = NULL; - - acpi_bus_scan_second_pass = false; - - /* Pass 1: Avoid enumerating devices with missing dependencies. */ + struct acpi_scan_context ctx = { + .postponed_head = LIST_HEAD_INIT(ctx.postponed_head), + }; + struct acpi_postponed_handle *ph, *tmp_ph; + int ret = 0; - if (ACPI_SUCCESS(acpi_bus_check_add(handle, true, &device))) + if (ACPI_SUCCESS(acpi_bus_check_add(handle, true, &ctx))) acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, - acpi_bus_check_add_1, NULL, NULL, - (void **)&device); - - if (!device) - return -ENODEV; - - acpi_bus_attach(device, (void *)true); + acpi_bus_check_add_1, NULL, (void *)&ctx, + NULL); - if (!acpi_bus_scan_second_pass) - return 0; - - /* Pass 2: Enumerate all of the remaining devices. */ + if (!ctx.device) { + ret = -ENODEV; + goto out_release; + } - device = NULL; + acpi_bus_attach(ctx.device, (void *)true); - if (ACPI_SUCCESS(acpi_bus_check_add(handle, false, &device))) - acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, - acpi_bus_check_add_2, NULL, NULL, - (void **)&device); + /* + * Proceed to register ACPI devices that were postponed due to _DEP + * objects during the namespace walk. + */ + list_for_each_entry_safe(ph, tmp_ph, &ctx.postponed_head, list) { + list_del(&ph->list); + /* Set device NULL here to obtain the root for this sub-tree. */ + ctx.device = NULL; + /* + * Do this manually, as the namespace walk will only include + * sub-nodes, not the node itself. ctx.device is set to the + * ACPI device corresponding ph->handle. + */ + acpi_bus_check_add_2(ph->handle, 0, &ctx, NULL); + /* Walk the rest of the sub-namespace. */ + acpi_walk_namespace(ACPI_TYPE_ANY, ph->handle, ACPI_UINT32_MAX, + acpi_bus_check_add_2, NULL, (void *)&ctx, + NULL); + if (ctx.device) + acpi_bus_attach(ctx.device, NULL); + kfree(ph); + } - acpi_bus_attach(device, NULL); +out_release: + list_for_each_entry_safe(ph, tmp_ph, &ctx.postponed_head, list) { + list_del(&ph->list); + kfree(ph); + } - return 0; + return ret; } EXPORT_SYMBOL(acpi_bus_scan); From patchwork Wed Mar 29 10:09:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668763 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 06FA6C77B6D for ; Wed, 29 Mar 2023 10:10:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231511AbjC2KKE (ORCPT ); Wed, 29 Mar 2023 06:10:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231517AbjC2KKA (ORCPT ); Wed, 29 Mar 2023 06:10:00 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C4291724; Wed, 29 Mar 2023 03:09:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084599; x=1711620599; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=aMaKHZ+sOaceKGE77joDQX5kyAJ9jYBW7/J7dxvAchw=; b=SXakLvS/rpT00LGabM7/tAkQMtFVdcsPRpRJOfIt255c/SQL6l7nmSeo tb+zpEv/p+PWyTLMgi+5dV75315/OcDQ3NpN2orAlOarQXP09P/fO7aQ+ Smn4QXz9BC+ZaCI+s6YMdZe3WB68ICtzwOuaplC4KP+vjRH/Y7N58yqCC 2FflRPb7AJo1+Byjj/detCdYhowgsTtlsK/L2H6+aig2NRxBGghlQY8fe LlGjuL79iZ7X++rJYN8uMz5BP6d1UWMHgJQ0OQ8Wh6nWbn0XqxG1727fU Yj2a87BtKFC+oC0utuV46nfDRfwPsKt1NXPFZfq26anAPTiqS5T+6ytyO A==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256229" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256229" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517706" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517706" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:57 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 7B339122636; Wed, 29 Mar 2023 13:09:54 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 02/10] ACPI: property: Parse data node string references in properties Date: Wed, 29 Mar 2023 13:09:43 +0300 Message-Id: <20230329100951.1522322-3-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add support for parsing property references using strings, besides reference objects that were previously supported. This allows also referencing data nodes which was not possible with reference objects. Also add pr_fmt() macro to prefix printouts. While at it, update copyright. Signed-off-by: Sakari Ailus Acked-by: Rafael J. Wysocki --- drivers/acpi/property.c | 110 ++++++++++++++++++++++++++++++++++------ 1 file changed, 94 insertions(+), 16 deletions(-) diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index b8d9eb9a433e..08831ffba26c 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -2,14 +2,17 @@ /* * ACPI device specific properties support. * - * Copyright (C) 2014, Intel Corporation + * Copyright (C) 2014-2023, Intel Corporation * All rights reserved. * * Authors: Mika Westerberg - * Darren Hart - * Rafael J. Wysocki + * Darren Hart + * Rafael J. Wysocki + * Sakari Ailus */ +#define pr_fmt(fmt) "ACPI: " fmt + #include #include #include @@ -795,7 +798,8 @@ acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, static int acpi_get_ref_args(struct fwnode_reference_args *args, struct fwnode_handle *ref_fwnode, const union acpi_object **element, - const union acpi_object *end, size_t num_args) + const union acpi_object *end, size_t num_args, + bool subnode_string) { u32 nargs = 0, i; @@ -803,13 +807,16 @@ static int acpi_get_ref_args(struct fwnode_reference_args *args, * Find the referred data extension node under the * referred device node. */ - for (; *element < end && (*element)->type == ACPI_TYPE_STRING; - (*element)++) { - const char *child_name = (*element)->string.pointer; - - ref_fwnode = acpi_fwnode_get_named_child_node(ref_fwnode, child_name); - if (!ref_fwnode) - return -EINVAL; + if (subnode_string) { + for (; *element < end && (*element)->type == ACPI_TYPE_STRING; + (*element)++) { + const char *child_name = (*element)->string.pointer; + + ref_fwnode = acpi_fwnode_get_named_child_node(ref_fwnode, + child_name); + if (!ref_fwnode) + return -EINVAL; + } } /* @@ -820,7 +827,8 @@ static int acpi_get_ref_args(struct fwnode_reference_args *args, for (i = 0; (*element) + i < end && i < num_args; i++) { acpi_object_type type = (*element)[i].type; - if (type == ACPI_TYPE_LOCAL_REFERENCE) + if (type == ACPI_TYPE_LOCAL_REFERENCE || + (!subnode_string && type == ACPI_TYPE_STRING)) break; if (type == ACPI_TYPE_INTEGER) @@ -844,6 +852,43 @@ static int acpi_get_ref_args(struct fwnode_reference_args *args, return 0; } +static struct fwnode_handle * +acpi_parse_string_ref(const struct fwnode_handle *fwnode, const char *refstring) +{ + acpi_handle scope, handle; + struct acpi_data_node *dn; + struct acpi_device *device; + acpi_status status; + + if (is_acpi_device_node(fwnode)) { + scope = to_acpi_device_node(fwnode)->handle; + } else if (is_acpi_data_node(fwnode)) { + scope = to_acpi_data_node(fwnode)->handle; + } else { + pr_debug("bad node type for node %pfw\n", fwnode); + return ERR_PTR(-EINVAL); + } + + status = acpi_get_handle(scope, refstring, &handle); + if (ACPI_FAILURE(status)) { + acpi_handle_debug(scope, "can't get handle for %s", refstring); + return ERR_PTR(-EINVAL); + } + + device = acpi_fetch_acpi_dev(handle); + if (device) + return acpi_fwnode_handle(device); + + status = acpi_get_data_full(handle, acpi_nondev_subnode_tag, + (void **)&dn, NULL); + if (ACPI_FAILURE(status) || !dn) { + acpi_handle_debug(handle, "can't find subnode"); + return ERR_PTR(-EINVAL); + } + + return &dn->fwnode; +} + /** * __acpi_node_get_property_reference - returns handle to the referenced object * @fwnode: Firmware node to get the property from @@ -886,6 +931,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, const union acpi_object *element, *end; const union acpi_object *obj; const struct acpi_device_data *data; + struct fwnode_handle *ref_fwnode; struct acpi_device *device; int ret, idx = 0; @@ -909,16 +955,29 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, args->fwnode = acpi_fwnode_handle(device); args->nargs = 0; + return 0; + case ACPI_TYPE_STRING: + if (index) + return -ENOENT; + + ref_fwnode = acpi_parse_string_ref(fwnode, obj->string.pointer); + if (IS_ERR(ref_fwnode)) + return PTR_ERR(ref_fwnode); + + args->fwnode = ref_fwnode; + args->nargs = 0; + return 0; case ACPI_TYPE_PACKAGE: /* * If it is not a single reference, then it is a package of - * references followed by number of ints as follows: + * references, followed by number of ints as follows: * * Package () { REF, INT, REF, INT, INT } * - * The index argument is then used to determine which reference - * the caller wants (along with the arguments). + * Here, REF may be either a local reference or a string. The + * index argument is then used to determine which reference the + * caller wants (along with the arguments). */ break; default: @@ -942,7 +1001,26 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, ret = acpi_get_ref_args(idx == index ? args : NULL, acpi_fwnode_handle(device), - &element, end, num_args); + &element, end, num_args, true); + if (ret < 0) + return ret; + + if (idx == index) + return 0; + + break; + case ACPI_TYPE_STRING: + ref_fwnode = + acpi_parse_string_ref(fwnode, + element->string.pointer); + if (IS_ERR(ref_fwnode)) + return PTR_ERR(ref_fwnode); + + element++; + + ret = acpi_get_ref_args(idx == index ? args : NULL, + ref_fwnode, &element, end, + num_args, false); if (ret < 0) return ret; From patchwork Wed Mar 29 10:09:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668474 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 6B183C761A6 for ; Wed, 29 Mar 2023 10:10:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231481AbjC2KKI (ORCPT ); Wed, 29 Mar 2023 06:10:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231351AbjC2KKC (ORCPT ); Wed, 29 Mar 2023 06:10:02 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41FF0DE; Wed, 29 Mar 2023 03:10:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084600; x=1711620600; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=uUpsHO+dWWF7hNHnC0EQaRYFZ8CokYy2tr/3LEI7FQg=; b=TNyEtIES+lX2HaC5nJRpf/5p73UQXajGJJ6A2k1DbwTd1zIa5e0z66zb 1D+Z6TCt2mQ4PVVUWJRmeAP+X0CqxtrfRiGC3EjCkbYtwQnrgRWL7v+uo 19OHDy217BAA5uPOL9A0r0DTLtuPe70DQ5MDjC/Qx3uW4ZkPcc0R1SYOq HVT+oU6GGbhtBJ8XJkn7IQjrxYA++qopVlOK58E7s6mpeWe2cXHQ1IJ3l pd2QTyWdLGrkPo8BBpBgSomskVQjcEcZR1H6FpGSrBiyGKNhhydJgykhs mQt/aK7/39MWkqmu/QP4WfhNULXHIsjfu7EjdlyZQTjf+ZSWA3JgzOXir Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256231" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256231" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517709" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517709" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:58 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 64DEF1227DF; Wed, 29 Mar 2023 13:09:55 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 03/10] ACPI: property: Parse _CRS CSI-2 descriptor Date: Wed, 29 Mar 2023 13:09:44 +0300 Message-Id: <20230329100951.1522322-4-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Parse newly added ACPI _CRS CSI-2 descriptor for CSI-2 and camera configuration, associate it with appropriate devices and allocate memory for software nodes needed to create a DT-like data structure for drivers. Signed-off-by: Sakari Ailus --- drivers/acpi/Makefile | 2 +- drivers/acpi/internal.h | 27 ++++ drivers/acpi/mipi.c | 343 ++++++++++++++++++++++++++++++++++++++++ drivers/acpi/scan.c | 50 ++++-- include/acpi/acpi_bus.h | 11 ++ 5 files changed, 418 insertions(+), 15 deletions(-) create mode 100644 drivers/acpi/mipi.c diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index a5b649e71ab1..a98fa1bc1554 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -37,7 +37,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o # ACPI Bus and Device Drivers # acpi-y += bus.o glue.o -acpi-y += scan.o +acpi-y += scan.o mipi.o acpi-y += resource.o acpi-y += acpi_processor.o acpi-y += processor_core.o diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 06ad497067ac..aa5f9c69dbbe 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -102,6 +102,24 @@ struct acpi_device_bus_id { struct list_head node; }; +/* Context for scanning ACPI device nodes for _CRS CSI2 resource descriptors */ +struct acpi_scan_context_csi2 { + struct list_head crs_csi2_head; + size_t handle_count; +}; + +/** + * struct acpi_scan_context - Context for scanning ACPI devices + * @postponed_head: The list head of the postponed ACPI handles + * @device: The first encountered device, typically the root of the scanned tree + * @csi2: Context for scanning _CRS CSI2 resource descriptors + */ +struct acpi_scan_context { + struct list_head postponed_head; + struct acpi_device *device; + struct acpi_scan_context_csi2 csi2; +}; + void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, int type, void (*release)(struct device *)); int acpi_tie_acpi_dev(struct acpi_device *adev); @@ -282,4 +300,13 @@ void acpi_init_lpit(void); static inline void acpi_init_lpit(void) { } #endif +/*-------------------------------------------------------------------------- + ACPI _CRS CSI2 and MIPI DisCo for Imaging conversion + -------------------------------------------------------------------------- */ + +void acpi_crs_csi2_swnodes_del_free(void); +void acpi_bus_scan_check_crs_csi2(acpi_handle handle, struct acpi_scan_context *ctx); +void acpi_bus_scan_crs_csi2_release(struct list_head *crs_csi2_handles); +void acpi_bus_scan_crs_csi2(struct acpi_scan_context_csi2 *ctx); + #endif /* _ACPI_INTERNAL_H_ */ diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c new file mode 100644 index 000000000000..d719c879eb83 --- /dev/null +++ b/drivers/acpi/mipi.c @@ -0,0 +1,343 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MIPI DisCo for Imaging support. + * + * Support MIPI DisCo for Imaging by parsing ACPI _CRS CSI2 records and DisCo + * for Imaging data structures. + * + * Also see . + * + * Copyright (C) 2023 Intel Corporation + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "internal.h" + +/* Temporary ACPI device handle to software node data structure mapping */ +struct crs_csi2_swnodes { + struct list_head list; + acpi_handle handle; + struct acpi_device_software_nodes *ads; +}; + +static LIST_HEAD(crs_csi2_swnodes); + +static void crs_csi2_swnode_del_free(struct crs_csi2_swnodes *swnodes) +{ + list_del(&swnodes->list); + kfree(swnodes); +} + +void acpi_crs_csi2_swnodes_del_free(void) +{ + struct crs_csi2_swnodes *swnodes, *swnodes_tmp; + + list_for_each_entry_safe(swnodes, swnodes_tmp, &crs_csi2_swnodes, list) + crs_csi2_swnode_del_free(swnodes); +} + +/* + * Description of a _CRS CSI2 resource descriptor before software node creation + */ +struct crs_csi2_instance { + struct list_head list; + struct acpi_resource_csi2_serialbus csi2; + acpi_handle remote_handle; + char remote_name[]; +}; + +/* Temporary list of ACPI device nodes with _CRS CSI2 resource descriptors */ +struct crs_csi2 { + struct list_head list; + acpi_handle handle; + struct list_head buses; +}; + +/* + * Context for collecting _CRS CSI2 resource descriptors during ACPI namespace + * walk + */ +struct scan_check_crs_csi2_context { + struct list_head res_head; + acpi_handle handle; + size_t handle_count; +}; + +/* Scan a single CSI2 resource descriptor in _CRS. */ +static acpi_status scan_check_crs_csi2_instance(struct acpi_resource *res, + void *context) +{ + struct scan_check_crs_csi2_context *inst_context = context; + struct acpi_resource_csi2_serialbus *csi2; + struct crs_csi2_instance *inst; + acpi_handle remote_handle; + + if (res->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return AE_OK; + + csi2 = &res->data.csi2_serial_bus; + + if (csi2->type != ACPI_RESOURCE_SERIAL_TYPE_CSI2) + return AE_OK; + + if (!csi2->resource_source.string_length) { + acpi_handle_debug(inst_context->handle, + "invalid resource source string length\n"); + return AE_OK; + } + + if (ACPI_FAILURE(acpi_get_handle(NULL, csi2->resource_source.string_ptr, + &remote_handle))) { + acpi_handle_warn(inst_context->handle, + "cannot get handle for %s\n", + csi2->resource_source.string_ptr); + return AE_OK; + } + + /* + * Allocate space to store the _CRS CSI2 entry and its data and add it + * to the list. + */ + inst = kmalloc(struct_size(inst, remote_name, csi2->resource_source.string_length), + GFP_KERNEL); + if (!inst) + return AE_OK; + + inst->csi2 = *csi2; + strscpy(inst->remote_name, csi2->resource_source.string_ptr, + csi2->resource_source.string_length); + inst->csi2.resource_source.string_ptr = inst->remote_name; + inst->remote_handle = remote_handle; + + list_add(&inst->list, &inst_context->res_head); + + inst_context->handle_count++; + + return AE_OK; +} + +/* + * Find all devices with _CRS CSI2 resource descriptors and collect them + * into a list for later use. + */ +void acpi_bus_scan_check_crs_csi2(acpi_handle handle, struct acpi_scan_context *ctx) +{ + struct scan_check_crs_csi2_context inst_context = { + .handle = handle, + .res_head = LIST_HEAD_INIT(inst_context.res_head), + }; + struct crs_csi2 *csi2; + + acpi_walk_resources(handle, METHOD_NAME__CRS, + scan_check_crs_csi2_instance, &inst_context); + + if (list_empty(&inst_context.res_head)) + return; + + /* + * Found entry, so allocate memory for it, fill it and add it to the + * list. + */ + csi2 = kmalloc(sizeof(*csi2), GFP_KERNEL); + if (!csi2) + return; /* There's nothing we really can do about this. */ + + csi2->handle = handle; + list_replace(&inst_context.res_head, &csi2->buses); + list_add(&csi2->list, &ctx->csi2.crs_csi2_head); + + /* This handle plus remote handles in _CRS CSI2 resource descriptors */ + ctx->csi2.handle_count += 1 + inst_context.handle_count; +} + +struct acpi_handle_ref { + acpi_handle handle; + unsigned int count; +}; + +#define NO_CSI2_PORT (UINT_MAX - 1) + +static int crs_handle_cmp(const void *__a, const void *__b) +{ + const struct acpi_handle_ref *a = __a, *b = __b; + + return a->handle < b->handle ? -1 : a->handle > b->handle; +} + +/* + * Release entries in temporary storage of ACPI device nodes with _CRS CSI2 + * resource descriptors. + */ +void acpi_bus_scan_crs_csi2_release(struct list_head *crs_csi2_handles) +{ + struct crs_csi2 *csi2, *csi2_tmp; + + list_for_each_entry_safe(csi2, csi2_tmp, crs_csi2_handles, list) { + struct crs_csi2_instance *inst, *inst_tmp; + + list_for_each_entry_safe(inst, inst_tmp, &csi2->buses, list) { + list_del(&inst->list); + kfree(inst); + } + + list_del(&csi2->list); + kfree(csi2); + } +} + +/* + * Allocate memory and set up software nodes for an ACPI device with given + * number of CSI-2 ports. + */ +static void acpi_crs_csi2_alloc_fill_swnodes(size_t ports_count, acpi_handle handle) +{ + struct acpi_device_software_nodes *ads; + struct crs_csi2_swnodes *swnodes; + size_t alloc_size; + unsigned int i; + bool overflow; + void *end; + + /* + * Allocate memory for ports, node pointers (number of nodes + + * 1 (guardian), nodes (root + number of ports * 2 (because for + * every port there is an endpoint)). + */ + overflow = check_mul_overflow(sizeof(*ads->ports) + + sizeof(*ads->nodes) * 2 + + sizeof(*ads->nodeptrs) * 2, + ports_count, &alloc_size); + overflow = overflow || + check_add_overflow(sizeof(*ads) + sizeof(*ads->nodes) + + sizeof(*ads->nodeptrs) * 2, + alloc_size, &alloc_size); + if (overflow) { + acpi_handle_warn(handle, + "too many _CRS CSI2 resource handles (%zu)", + ports_count); + return; + } + + swnodes = kzalloc(sizeof(*swnodes), GFP_KERNEL); + ads = kmalloc(alloc_size, GFP_KERNEL); + if (!swnodes || !ads) + goto out_free; + + ads->ports = (void *)(ads + 1); + ads->nodes = (void *)(ads->ports + ports_count); + ads->nodeptrs = (void *)(ads->nodes + ports_count * 2 + 1); + end = ads->nodeptrs + ports_count * 2 + 2; + if (WARN_ON((void *)ads + alloc_size != end)) + goto out_free; + + ads->num_ports = ports_count; + for (i = 0; i < ports_count * 2 + 1; i++) + ads->nodeptrs[i] = &ads->nodes[i]; + ads->nodeptrs[i] = NULL; + for (i = 0; i < ports_count; i++) + ads->ports[i].port_nr = NO_CSI2_PORT; + swnodes->handle = handle; + swnodes->ads = ads; + list_add(&swnodes->list, &crs_csi2_swnodes); + + return; + +out_free: + kfree(swnodes); + kfree(ads); + acpi_handle_debug(handle, "cannot allocate for %zu software nodes\n", + ports_count); +} + +/** + * acpi_bus_scan_crs_csi2 - Construct software nodes out of ACPI _CRS CSI2 + * resource descriptors + * @ctx: ACPI _CRS CSI2 context, gathered during tree walk earlier + * + * This function does a number of things: + * + * 1. Count how many references to other devices _CRS CSI-2 instances have in + * total. + * + * 2. Count the number of references to other devices for each _CRS CSI-2 + * instance. + * + * 3. Allocate memory for swnodes each ACPI device requires later on, and + * generate a list of such allocations. + * + * Note that struct acpi_device may not be available yet at this time. + * + * acpi_scan_lock in scan.c must be held when calling this function. + */ +void acpi_bus_scan_crs_csi2(struct acpi_scan_context_csi2 *ctx) +{ + struct acpi_handle_ref *handle_refs; + struct acpi_handle_ref *this = NULL; + size_t this_count; + unsigned int curr = 0; + struct crs_csi2 *csi2; + + /* No handles? Bail out here. */ + if (!ctx->handle_count) + return; + + handle_refs = kcalloc(ctx->handle_count + 1, sizeof(*handle_refs), + GFP_KERNEL); + if (!handle_refs) { + pr_debug("no memory for %zu handle refs\n", + ctx->handle_count + 1); + return; + } + + /* Associate handles to the number of references. */ + list_for_each_entry(csi2, &ctx->crs_csi2_head, list) { + struct crs_csi2_instance *inst; + struct acpi_handle_ref *handle_ref; + + handle_ref = &handle_refs[curr++]; + handle_ref->handle = csi2->handle; + + list_for_each_entry(inst, &csi2->buses, list) { + handle_refs[curr].handle = inst->remote_handle; + handle_refs[curr].count = 1; + handle_ref->count++; + curr++; + } + } + + handle_refs[curr].handle = NULL; + + /* Sort the handles by remote so duplicates canbe easily found. */ + sort(handle_refs, ctx->handle_count, sizeof(*handle_refs), crs_handle_cmp, NULL); + + /* + * Finally count references in each handle, allocate space for device + * specific ports, properties and fill the _CRS CSI2 descriptor + * originated data. + */ + this = handle_refs; + this_count = this->count; + for (curr = 1; curr < ctx->handle_count + 1; curr++) { + /* Weed out duplicate receiver devices. */ + if (this->handle == handle_refs[curr].handle) { + this_count += handle_refs[curr].count; + continue; + } + + acpi_crs_csi2_alloc_fill_swnodes(this_count, this->handle); + + this = &handle_refs[curr]; + this_count = this->count; + } + + kfree(handle_refs); +} diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 280d12e0aa2f..ddf7701a57d0 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2042,16 +2042,6 @@ struct acpi_postponed_handle { acpi_handle handle; }; -/** - * struct acpi_scan_context - Context for scanning ACPI devices - * @postponed_head: The list head of the postponed ACPI handles - * @device: The first encountered device, typically the root of the scanned tree - */ -struct acpi_scan_context { - struct list_head postponed_head; - struct acpi_device *device; -}; - /** * acpi_bus_handle_postpone - Add an ACPI handle to a given postponed list * @handle: The ACPI handle @@ -2073,7 +2063,7 @@ static void acpi_bus_handle_postpone(acpi_handle handle, list_add(&ph->list, head); } -static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, +static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass, struct acpi_scan_context *ctx) { struct acpi_device *device = acpi_fetch_acpi_dev(handle); @@ -2091,8 +2081,11 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, if (acpi_device_should_be_hidden(handle)) return AE_OK; + if (first_pass) + acpi_bus_scan_check_crs_csi2(handle, ctx); + /* Bail out if there are dependencies. */ - if (acpi_scan_check_dep(handle, check_dep) > 0) { + if (acpi_scan_check_dep(handle, first_pass) > 0) { acpi_bus_handle_postpone(handle, &ctx->postponed_head); return AE_CTRL_DEPTH; } @@ -2118,10 +2111,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, } /* - * If check_dep is true at this point, the device has no dependencies, + * If first_pass is true at this point, the device has no dependencies, * or the creation of the device object would have been postponed above. */ - acpi_add_single_object(&device, handle, type, !check_dep); + acpi_add_single_object(&device, handle, type, !first_pass); if (!device) return AE_CTRL_DEPTH; @@ -2146,6 +2139,14 @@ static acpi_status acpi_bus_check_add_2(acpi_handle handle, u32 lvl_not_used, return acpi_bus_check_add(handle, false, (struct acpi_scan_context *)ctx); } +static acpi_status acpi_bus_check_csi2(acpi_handle handle, u32 lvl_not_used, + void *ctx, void **unused) +{ + acpi_bus_scan_check_crs_csi2(handle, ctx); + + return AE_OK; +} + static void acpi_default_enumeration(struct acpi_device *device) { /* @@ -2466,6 +2467,7 @@ int acpi_bus_scan(acpi_handle handle) { struct acpi_scan_context ctx = { .postponed_head = LIST_HEAD_INIT(ctx.postponed_head), + .csi2.crs_csi2_head = LIST_HEAD_INIT(ctx.csi2.crs_csi2_head), }; struct acpi_postponed_handle *ph, *tmp_ph; int ret = 0; @@ -2480,6 +2482,24 @@ int acpi_bus_scan(acpi_handle handle) goto out_release; } + /* + * Check _CRS CSI2 resource descriptors for devices that were not + * traversed during the previous pass. + */ + list_for_each_entry_safe(ph, tmp_ph, &ctx.postponed_head, list) { + acpi_bus_check_csi2(ph->handle, 0, &ctx, NULL); + acpi_walk_namespace(ACPI_TYPE_DEVICE, ph->handle, ACPI_UINT32_MAX, + acpi_bus_check_csi2, NULL, (void *)&ctx, + NULL); + } + + /* + * Construct software nodes out of _CRS CSI2 records and release the + * _CRS CSI2 records. + */ + acpi_bus_scan_crs_csi2(&ctx.csi2); + acpi_bus_scan_crs_csi2_release(&ctx.csi2.crs_csi2_head); + acpi_bus_attach(ctx.device, (void *)true); /* @@ -2511,6 +2531,8 @@ int acpi_bus_scan(acpi_handle handle) kfree(ph); } + acpi_crs_csi2_swnodes_del_free(); + return ret; } EXPORT_SYMBOL(acpi_bus_scan); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 57acb895c038..e4e8faac9212 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -360,6 +360,17 @@ struct acpi_device_data { struct acpi_gpio_mapping; +struct acpi_device_software_node_port { + unsigned int port_nr; +}; + +struct acpi_device_software_nodes { + struct acpi_device_software_node_port *ports; + struct software_node *nodes; + const struct software_node **nodeptrs; + unsigned int num_ports; +}; + /* Device */ struct acpi_device { u32 pld_crc; From patchwork Wed Mar 29 10:09:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668762 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 C764AC74A5B for ; Wed, 29 Mar 2023 10:10:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231192AbjC2KKL (ORCPT ); Wed, 29 Mar 2023 06:10:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231519AbjC2KKD (ORCPT ); Wed, 29 Mar 2023 06:10:03 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2816A44A2; 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a="773517716" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517716" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:09:59 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 400E6122809; Wed, 29 Mar 2023 13:09:56 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 04/10] device property: Add SOFTWARE_NODE() macro for defining software nodes Date: Wed, 29 Mar 2023 13:09:45 +0300 Message-Id: <20230329100951.1522322-5-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add SOFTWARE_NODE() macro in order to make defining software nodes look nicer. This is analogous to different PROPERTY_ENTRY_*() macros for defining properties. Signed-off-by: Sakari Ailus Reviewed-by: Andy Shevchenko Reviewed-by: Heikki Krogerus --- include/linux/property.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/property.h b/include/linux/property.h index 0a29db15ff34..b2562f512c49 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -477,6 +477,13 @@ struct software_node { const struct property_entry *properties; }; +#define SOFTWARE_NODE(_name_, _properties_, _parent_) \ + (struct software_node) { \ + .name = _name_, \ + .properties = _properties_, \ + .parent = _parent_, \ + } + bool is_software_node(const struct fwnode_handle *fwnode); const struct software_node * to_software_node(const struct fwnode_handle *fwnode); From patchwork Wed Mar 29 10:09:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668761 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 B4317C77B6F for ; Wed, 29 Mar 2023 10:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231515AbjC2KKN (ORCPT ); Wed, 29 Mar 2023 06:10:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231514AbjC2KKI (ORCPT ); Wed, 29 Mar 2023 06:10:08 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4990A4490; Wed, 29 Mar 2023 03:10:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084602; x=1711620602; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=bZoQfl/3cJtP/7IV13PEnjLGEGgKITSwP9qyuPIlmdM=; b=Yn9i1UkwBM/evQZRpt90F4OmVfJbaFEOZtw7ETHKauyBATuGaUnMT+h0 gL14YqdyC6kaVfvQ75Cj/zM86LZjAFHD+ZGNuHdpdqrAVfN4pCuejz7fr M6wafbhHTl48zwHN7zADbdsgj2Mim8ldeoc/+T1abC/Dv6rVfsp7QN4Ya JK574u4Vq690wgKnUC3dYSQ7bIjldS1LicEqTLftC+FbDLhkkLkV6ugP8 kdOTWPV1RXVfjTz4QiYWP/M5X1JlD4EI5HsY3lv0EwCFIheEdYwKteLt7 51nnZYEbaU4iGoOelCpXOOVqCqO5DpjLvrD1QYfmpGAbhMnx7JnZEadl6 w==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256240" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256240" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517717" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517717" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:00 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 1451812280E; Wed, 29 Mar 2023 13:09:56 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 05/10] ACPI: property: Prepare generating swnodes for ACPI and DisCo for Imaging Date: Wed, 29 Mar 2023 13:09:46 +0300 Message-Id: <20230329100951.1522322-6-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Prepare generating software nodes for information parsed from ACPI _CRS for CSI-2 as well as MIPI DisCo for Imaging spec. The software nodes are compliant with existing ACPI or DT definitions and are parsed by relevant drivers without changes. Signed-off-by: Sakari Ailus --- drivers/acpi/internal.h | 3 + drivers/acpi/mipi.c | 358 +++++++++++++++++++++++++++++++++++++++- drivers/acpi/scan.c | 21 ++- include/acpi/acpi_bus.h | 70 ++++++++ 4 files changed, 449 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index aa5f9c69dbbe..1634a177c75e 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -304,9 +304,12 @@ static inline void acpi_init_lpit(void) { } ACPI _CRS CSI2 and MIPI DisCo for Imaging conversion -------------------------------------------------------------------------- */ +#define MIPI_IMG_PORT_PREFIX "mipi-img-port-" + void acpi_crs_csi2_swnodes_del_free(void); void acpi_bus_scan_check_crs_csi2(acpi_handle handle, struct acpi_scan_context *ctx); void acpi_bus_scan_crs_csi2_release(struct list_head *crs_csi2_handles); void acpi_bus_scan_crs_csi2(struct acpi_scan_context_csi2 *ctx); +void acpi_init_swnodes(struct acpi_device *device); #endif /* _ACPI_INTERNAL_H_ */ diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c index d719c879eb83..03079f78bd2c 100644 --- a/drivers/acpi/mipi.c +++ b/drivers/acpi/mipi.c @@ -3,7 +3,8 @@ * MIPI DisCo for Imaging support. * * Support MIPI DisCo for Imaging by parsing ACPI _CRS CSI2 records and DisCo - * for Imaging data structures. + * for Imaging data structures and generating nodes and properties using + * software nodes compliant with DT definitions of the similar scope. * * Also see . * @@ -20,6 +21,8 @@ #include #include +#include + #include "internal.h" /* Temporary ACPI device handle to software node data structure mapping */ @@ -31,6 +34,18 @@ struct crs_csi2_swnodes { static LIST_HEAD(crs_csi2_swnodes); +/* Obtain pre-allocated software nodes for an ACPI device handle */ +static struct acpi_device_software_nodes *crs_csi2_swnode_get(acpi_handle handle) +{ + struct crs_csi2_swnodes *swnodes; + + list_for_each_entry(swnodes, &crs_csi2_swnodes, list) + if (swnodes->handle == handle) + return swnodes->ads; + + return NULL; +} + static void crs_csi2_swnode_del_free(struct crs_csi2_swnodes *swnodes) { list_del(&swnodes->list); @@ -166,6 +181,35 @@ struct acpi_handle_ref { #define NO_CSI2_PORT (UINT_MAX - 1) +/* + * Return next free entry in ports array of a software nodes related to an ACPI + * device. + */ +static unsigned int next_csi2_port_index(struct acpi_device_software_nodes *ads, + unsigned int port_nr) +{ + unsigned int i; + + for (i = 0; i < ads->num_ports; i++) { + struct acpi_device_software_node_port *port = &ads->ports[i]; + + if (port->port_nr == port_nr) + return i; + + if (port->port_nr == NO_CSI2_PORT) { + port->port_nr = port_nr; + return i; + } + } + + return NO_CSI2_PORT; +} + +/* Print graph port name into a buffer, return non-zero if failed. */ +#define GRAPH_PORT_NAME(var, num) \ + (snprintf((var), sizeof(var), SWNODE_GRAPH_PORT_NAME_FMT, (num)) >= \ + sizeof(var)) + static int crs_handle_cmp(const void *__a, const void *__b) { const struct acpi_handle_ref *a = __a, *b = __b; @@ -258,6 +302,9 @@ static void acpi_crs_csi2_alloc_fill_swnodes(size_t ports_count, acpi_handle han ports_count); } +#define ACPI_CRS_CSI2_PHY_TYPE_C 0 +#define ACPI_CRS_CSI2_PHY_TYPE_D 1 + /** * acpi_bus_scan_crs_csi2 - Construct software nodes out of ACPI _CRS CSI2 * resource descriptors @@ -274,6 +321,8 @@ static void acpi_crs_csi2_alloc_fill_swnodes(size_t ports_count, acpi_handle han * 3. Allocate memory for swnodes each ACPI device requires later on, and * generate a list of such allocations. * + * 4. Set up properties for software nodes. + * * Note that struct acpi_device may not be available yet at this time. * * acpi_scan_lock in scan.c must be held when calling this function. @@ -339,5 +388,312 @@ void acpi_bus_scan_crs_csi2(struct acpi_scan_context_csi2 *ctx) this_count = this->count; } + /* + * Allocate and set up necessary software nodes for each device and set + * up properties from _CRS CSI2 descriptor. + */ + list_for_each_entry(csi2, &ctx->crs_csi2_head, list) { + struct acpi_device_software_nodes *local_swnodes; + struct crs_csi2_instance *inst; + + local_swnodes = crs_csi2_swnode_get(csi2->handle); + if (WARN_ON_ONCE(!local_swnodes)) + continue; + + list_for_each_entry(inst, &csi2->buses, list) { + struct acpi_device_software_nodes *remote_swnodes; + struct acpi_device_software_node_port *local_port; + struct acpi_device_software_node_port *remote_port; + struct software_node *local_node, *remote_node; + unsigned int local_index, remote_index; + unsigned int bus_type; + + remote_swnodes = crs_csi2_swnode_get(inst->remote_handle); + if (WARN_ON_ONCE(!remote_swnodes)) + continue; + + local_index = next_csi2_port_index(local_swnodes, inst->csi2.local_port_instance); + remote_index = next_csi2_port_index(remote_swnodes, inst->csi2.resource_source.index); + + if (WARN_ON_ONCE(local_index >= local_swnodes->num_ports) || + WARN_ON_ONCE(remote_index >= remote_swnodes->num_ports)) + goto out_free; + + switch (inst->csi2.phy_type) { + case ACPI_CRS_CSI2_PHY_TYPE_C: + bus_type = V4L2_FWNODE_BUS_TYPE_CSI2_CPHY; + break; + case ACPI_CRS_CSI2_PHY_TYPE_D: + bus_type = V4L2_FWNODE_BUS_TYPE_CSI2_DPHY; + break; + default: + acpi_handle_info(csi2->handle, + "ignoring CSI-2 PHY type %u\n", + inst->csi2.phy_type); + continue; + } + + local_port = &local_swnodes->ports[local_index]; + local_node = &local_swnodes->nodes[ACPI_DEVICE_SWNODE_EP(local_index)]; + local_port->remote_ep_ref[0] = SOFTWARE_NODE_REFERENCE(local_node); + local_port->crs_csi2_local = true; + + remote_port = &remote_swnodes->ports[remote_index]; + remote_node = &remote_swnodes->nodes[ACPI_DEVICE_SWNODE_EP(remote_index)]; + remote_port->remote_ep_ref[0] = SOFTWARE_NODE_REFERENCE(remote_node); + + local_port->ep_props[ACPI_DEVICE_SWNODE_EP_REMOTE_EP] = + PROPERTY_ENTRY_REF_ARRAY("remote-endpoint", + remote_port->remote_ep_ref); + local_port->ep_props[ACPI_DEVICE_SWNODE_EP_BUS_TYPE] = + PROPERTY_ENTRY_U32("bus-type", bus_type); + local_port->ep_props[ACPI_DEVICE_SWNODE_EP_REG] = + PROPERTY_ENTRY_U32("reg", 0); + local_port->port_props[ACPI_DEVICE_SWNODE_PRT_REG] = + PROPERTY_ENTRY_U32("reg", inst->csi2.local_port_instance); + if (GRAPH_PORT_NAME(local_port->port_name, + inst->csi2.local_port_instance)) + acpi_handle_warn(csi2->handle, + "name for local port %u too long", + inst->csi2.local_port_instance); + + remote_port->ep_props[ACPI_DEVICE_SWNODE_EP_REMOTE_EP] = + PROPERTY_ENTRY_REF_ARRAY("remote-endpoint", local_port->remote_ep_ref); + remote_port->ep_props[ACPI_DEVICE_SWNODE_EP_BUS_TYPE] = + PROPERTY_ENTRY_U32("bus-type", bus_type); + remote_port->ep_props[ACPI_DEVICE_SWNODE_EP_REG] = + PROPERTY_ENTRY_U32("reg", 0); + remote_port->port_props[ACPI_DEVICE_SWNODE_PRT_REG] = + PROPERTY_ENTRY_U32("reg", + inst->csi2.resource_source.index); + if (GRAPH_PORT_NAME(remote_port->port_name, + inst->csi2.resource_source.index)) + acpi_handle_warn(csi2->handle, + "name for remote port %u too long", + inst->csi2.resource_source.index); + } + } + +out_free: kfree(handle_refs); } + +/* + * Get the index of the next property in the property array, with a given + * maximum values. + */ +#define NEXT_PROPERTY(index, max) \ + (WARN_ON((index) > ACPI_DEVICE_SWNODE_##max) ? \ + ACPI_DEVICE_SWNODE_##max : (index)++) + +static struct fwnode_handle *get_mipi_port_handle(struct acpi_device *device, + unsigned int port) +{ + char mipi_port_name[sizeof(MIPI_IMG_PORT_PREFIX) + 2]; + + if (snprintf(mipi_port_name, sizeof(mipi_port_name), "%s%u", + MIPI_IMG_PORT_PREFIX, port) >= sizeof(mipi_port_name)) { + acpi_handle_info(acpi_device_handle(device), + "mipi port name too long for port %u\n", port); + return NULL; + } + + return fwnode_get_named_child_node(acpi_fwnode_handle(device), + mipi_port_name); +} + +static void init_port_csi2_common(struct acpi_device *device, + struct fwnode_handle *mipi_port_fwnode, + unsigned int *ep_prop_index, + unsigned int port_nr) +{ + unsigned int port_index = next_csi2_port_index(device->swnodes, port_nr); + struct acpi_device_software_nodes *ads = device->swnodes; + struct acpi_device_software_node_port *port = &ads->ports[port_index]; + unsigned int num_lanes = 0; + u8 val[ARRAY_SIZE(port->data_lanes)]; + int ret; + + *ep_prop_index = ACPI_DEVICE_SWNODE_EP_CLOCK_LANES; + + if (GRAPH_PORT_NAME(port->port_name, port_nr)) + return; + + ads->nodes[ACPI_DEVICE_SWNODE_PRT(port_index)] = + SOFTWARE_NODE(port->port_name, port->port_props, + &ads->nodes[ACPI_DEVICE_SWNODE_ROOT]); + + ret = fwnode_property_read_u8(mipi_port_fwnode, "mipi-img-clock-lane", val); + if (!ret) { + port->ep_props[NEXT_PROPERTY(*ep_prop_index, EP_CLOCK_LANES)] = + PROPERTY_ENTRY_U32("clock-lanes", *val); + } + ret = fwnode_property_count_u8(mipi_port_fwnode, "mipi-img-data-lanes"); + if (ret > 0) { + num_lanes = ret; + + if (num_lanes > ARRAY_SIZE(port->data_lanes)) { + acpi_handle_warn(acpi_device_handle(device), + "too many data lanes (%u)\n", + num_lanes); + num_lanes = ARRAY_SIZE(port->data_lanes); + } + + ret = fwnode_property_read_u8_array(mipi_port_fwnode, "mipi-img-data-lanes", + val, num_lanes); + if (!ret) { + unsigned int i; + + for (i = 0; i < num_lanes; i++) + port->data_lanes[i] = val[i]; + + port->ep_props[NEXT_PROPERTY(*ep_prop_index, EP_DATA_LANES)] = + PROPERTY_ENTRY_U32_ARRAY_LEN("data-lanes", port->data_lanes, + num_lanes); + } + } + + ret = fwnode_property_count_u8(mipi_port_fwnode, "mipi-img-lane-polarities"); + if (ret > 0) { + unsigned int bytes = min_t(unsigned int, ret, sizeof(val)); + + fwnode_property_read_u8_array(mipi_port_fwnode, + "mipi-img-lane-polarities", + val, bytes); + + /* Total number of lanes here is clock lane + data lanes */ + if (bytes * BITS_PER_TYPE(u8) >= 1 + num_lanes) { + unsigned int i; + + /* Move polarity bits to the lane polarity u32 array */ + for (i = 0; i < 1 + num_lanes; i++) + port->lane_polarities[i] = + (bool)(val[i >> 3] & (1 << (i & 7))); + + port->ep_props[NEXT_PROPERTY(*ep_prop_index, EP_LANE_POLARITIES)] = + PROPERTY_ENTRY_U32_ARRAY_LEN("lane-polarities", + port->lane_polarities, + 1 + num_lanes); + } else { + acpi_handle_warn(acpi_device_handle(device), + "too few lane polarity bytes (%u)\n", + bytes); + } + } + + ads->nodes[ACPI_DEVICE_SWNODE_EP(port_index)] = + SOFTWARE_NODE("endpoint@0", ads->ports[port_index].ep_props, + &ads->nodes[ACPI_DEVICE_SWNODE_PRT(port_index)]); +} + +static void init_port_csi2_local(struct acpi_device *device, + unsigned int port_nr) +{ + unsigned int port_index = next_csi2_port_index(device->swnodes, port_nr); + struct fwnode_handle *mipi_port_fwnode = + get_mipi_port_handle(device, port_nr); + struct acpi_device_software_node_port *port = + &device->swnodes->ports[port_index]; + unsigned int ep_prop_index; + int ret; + + init_port_csi2_common(device, mipi_port_fwnode, &ep_prop_index, port_nr); + + ret = fwnode_property_count_u64(mipi_port_fwnode, "mipi-img-link-frequencies"); + if (ret > 0) { + unsigned int num_link_freqs = ret; + + if (num_link_freqs > ARRAY_SIZE(port->link_frequencies)) { + acpi_handle_info(acpi_device_handle(device), + "too many link frequencies %u\n", + num_link_freqs); + num_link_freqs = ARRAY_SIZE(port->link_frequencies); + } + + ret = fwnode_property_read_u64_array(mipi_port_fwnode, + "mipi-img-link-frequencies", + port->link_frequencies, + num_link_freqs); + if (!ret) + port->ep_props[NEXT_PROPERTY(ep_prop_index, EP_LINK_FREQUENCIES)] = + PROPERTY_ENTRY_U64_ARRAY_LEN("link-frequencies", + port->link_frequencies, + num_link_freqs); + else + acpi_handle_info(acpi_device_handle(device), + "can't get link frequencies (%d)\n", + ret); + } + + fwnode_handle_put(mipi_port_fwnode); +} + +static void init_port_csi2_remote(struct acpi_device *device, + unsigned int port_nr) +{ + struct fwnode_handle *mipi_port_fwnode = get_mipi_port_handle(device, port_nr); + unsigned int ep_prop_index; + + init_port_csi2_common(device, mipi_port_fwnode, &ep_prop_index, port_nr); + + fwnode_handle_put(mipi_port_fwnode); +} + +/** + * acpi_init_swnodes - Set up software nodes for properties gathered elsewhere + * + * @device: ACPI device for which the software nodes are initialised + * + * Initialise and register software nodes for properties for which the data is + * gathered elsewhere, e.g. _CRS CSI-2 descriptors. The process itself takes + * place before this function is called. + * + * acpi_scan_lock in scan.c must be held when calling this function. + */ +void acpi_init_swnodes(struct acpi_device *device) +{ + struct acpi_device_software_nodes *ads; + struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER }; + acpi_handle handle = acpi_device_handle(device); + struct fwnode_handle *primary; + acpi_status status; + unsigned int i; + int ret; + + device->swnodes = ads = crs_csi2_swnode_get(handle); + if (!ads) + return; + + status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, "cannot get path name\n"); + return; + } + + ads->nodes[ACPI_DEVICE_SWNODE_ROOT] = + SOFTWARE_NODE(buffer.pointer, ads->dev_props, NULL); + + for (i = 0; i < ads->num_ports; i++) { + struct acpi_device_software_node_port *port = &ads->ports[i]; + + if (port->crs_csi2_local) + init_port_csi2_local(device, port->port_nr); + else + init_port_csi2_remote(device, port->port_nr); + } + + ret = software_node_register_node_group(ads->nodeptrs); + if (ret < 0) { + acpi_handle_warn(handle, + "cannot register software nodes (%d)!\n", ret); + device->swnodes = NULL; + return; + } + + /* + * Note we can't use set_secondary_fwnode() here as the device's + * primary fwnode hasn't been set yet. + */ + primary = acpi_fwnode_handle(device); + primary->secondary = software_node_fwnode(ads->nodes); +} diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index ddf7701a57d0..bf0645854cf1 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -449,10 +449,28 @@ static void acpi_free_power_resources_lists(struct acpi_device *device) } } +static void acpi_free_swnodes(struct acpi_device *device) +{ + struct acpi_device_software_nodes *ads = device->swnodes; + struct fwnode_handle *primary; + + if (!ads) + return; + + software_node_unregister_node_group(ads->nodeptrs); + primary = acpi_fwnode_handle(device); + primary->secondary = NULL; + kfree(ads->nodes[ACPI_DEVICE_SWNODE_ROOT].name); + kfree(ads); + + device->swnodes = NULL; +} + static void acpi_device_release(struct device *dev) { struct acpi_device *acpi_dev = to_acpi_device(dev); + acpi_free_swnodes(acpi_dev); acpi_free_properties(acpi_dev); acpi_free_pnp_ids(&acpi_dev->pnp); acpi_free_power_resources_lists(acpi_dev); @@ -2050,8 +2068,7 @@ struct acpi_postponed_handle { * Add a given ACPI handle to a list of ACPI objects for which the creation * of the device objects is to be postponed. */ -static void acpi_bus_handle_postpone(acpi_handle handle, - struct list_head *head) +static void acpi_bus_handle_postpone(acpi_handle handle, struct list_head *head) { struct acpi_postponed_handle *ph; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index e4e8faac9212..29d1e4d49d0c 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -360,15 +360,84 @@ struct acpi_device_data { struct acpi_gpio_mapping; +enum acpi_device_swnode_dev_props { + ACPI_DEVICE_SWNODE_DEV_NUM_OF, + ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES +}; + +enum acpi_device_swnode_port_props { + ACPI_DEVICE_SWNODE_PRT_REG, + ACPI_DEVICE_SWNODE_PRT_NUM_OF, + ACPI_DEVICE_SWNODE_PRT_NUM_ENTRIES +}; + +enum acpi_device_swnode_ep_props { + ACPI_DEVICE_SWNODE_EP_REMOTE_EP, + ACPI_DEVICE_SWNODE_EP_BUS_TYPE, + ACPI_DEVICE_SWNODE_EP_REG, + ACPI_DEVICE_SWNODE_EP_CLOCK_LANES, + ACPI_DEVICE_SWNODE_EP_DATA_LANES, + ACPI_DEVICE_SWNODE_EP_LANE_POLARITIES, + /* TX only */ + ACPI_DEVICE_SWNODE_EP_LINK_FREQUENCIES, + ACPI_DEVICE_SWNODE_EP_NUM_OF, + ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES +}; + +#define ACPI_DEVICE_SWNODE_ROOT 0 +/* + * Each device has a root swnode plus two times as many nodes as the + * number of CSI-2 ports. + */ +#define ACPI_DEVICE_SWNODE_PRT(port) (1 + 2 * (port)) +#define ACPI_DEVICE_SWNODE_EP(endpoint) \ + (ACPI_DEVICE_SWNODE_PRT(endpoint) + 1) + +#define ACPI_DEVICE_SWNODE_CSI2_DATA_LANES 4 + +/** + * struct acpi_device_software_node_port: Software nodes for MIPI DisCo for + * Imaging support + * @port_name: the name of the port + * @data_lanes: "data-lanes" property values + * @lane_polarities: "lane-polarities" property values + * @link_frequencies: "link_frequencies" property values + * @port_nr: the number of the port + * @crs_crs2_local: whether the _CRS CSI2 record is local to the port (i.e. the + * port is a transmitter port) + * port_props: the port properties + * ep_props: the endpoint properties + * remote_ep_ref: reference to the remote endpoint + */ struct acpi_device_software_node_port { + char port_name[8]; + u32 data_lanes[ACPI_DEVICE_SWNODE_CSI2_DATA_LANES]; + u32 lane_polarities[1 /* clock lane */ + + ACPI_DEVICE_SWNODE_CSI2_DATA_LANES]; + u64 link_frequencies[4]; unsigned int port_nr; + bool crs_csi2_local; + + struct property_entry port_props[ACPI_DEVICE_SWNODE_PRT_NUM_ENTRIES]; + struct property_entry ep_props[ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES]; + + struct software_node_ref_args remote_ep_ref[1]; }; +/** + * struct acpi_device_software_nodes - Software nodes for an ACPI device + * @ports: information related to each port and endpoint within a port + * @nodes: software nodes for root as well as ports and endpoints + * @nodeprts: array of software node pointers, for (un)registering them + * @num_ports: the number of ports + */ struct acpi_device_software_nodes { struct acpi_device_software_node_port *ports; struct software_node *nodes; const struct software_node **nodeptrs; unsigned int num_ports; + + struct property_entry dev_props[ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES]; }; /* Device */ @@ -377,6 +446,7 @@ struct acpi_device { int device_type; acpi_handle handle; /* no handle for fixed hardware */ struct fwnode_handle fwnode; + struct acpi_device_software_nodes *swnodes; struct list_head wakeup_list; struct list_head del_list; struct acpi_device_status status; From patchwork Wed Mar 29 10:09:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668473 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 CED97C77B6E for ; Wed, 29 Mar 2023 10:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231503AbjC2KKM (ORCPT ); Wed, 29 Mar 2023 06:10:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231520AbjC2KKI (ORCPT ); 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29 Mar 2023 03:10:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517718" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517718" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:01 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 4A7731224D2; Wed, 29 Mar 2023 13:09:58 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 06/10] ACPI: scan: Generate software nodes based on MIPI DisCo for Imaging Date: Wed, 29 Mar 2023 13:09:47 +0300 Message-Id: <20230329100951.1522322-7-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Generate software nodes for driver use, based on MIPI DisCo for Imaging definitions. During the (sub-)namespace walk, ACPI device nodes are created but the drivers aren't probed for the devices yet. A convenient way to determine which ACPI devices this applies to is to find a hierarchical data node that begins with "mipi-img-port-". These devices need software nodes that need to be present before probing, and can only be constructed once the related _CRS CSI2 records have been parsed. Signed-off-by: Sakari Ailus --- drivers/acpi/internal.h | 11 ++++-- drivers/acpi/power.c | 2 +- drivers/acpi/property.c | 48 +++++++++++++++++-------- drivers/acpi/scan.c | 80 +++++++++++++++++++++++++++++++++-------- 4 files changed, 109 insertions(+), 32 deletions(-) diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 1634a177c75e..36799cde281c 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -111,17 +111,23 @@ struct acpi_scan_context_csi2 { /** * struct acpi_scan_context - Context for scanning ACPI devices * @postponed_head: The list head of the postponed ACPI handles + * @mipi_img_head: The list of ACPI devices with MIPI DisCo for Imaging related + * properties * @device: The first encountered device, typically the root of the scanned tree * @csi2: Context for scanning _CRS CSI2 resource descriptors */ struct acpi_scan_context { struct list_head postponed_head; + struct list_head mipi_img_head; struct acpi_device *device; struct acpi_scan_context_csi2 csi2; }; +void acpi_bus_device_postpone(struct acpi_device *device, + struct list_head *head); void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, - int type, void (*release)(struct device *)); + int type, void (*release)(struct device *), + struct list_head *mipi_img_head); int acpi_tie_acpi_dev(struct acpi_device *adev); int acpi_device_add(struct acpi_device *device); int acpi_device_setup_files(struct acpi_device *dev); @@ -275,7 +281,8 @@ static inline bool force_storage_d3(void) -------------------------------------------------------------------------- */ #define ACPI_DT_NAMESPACE_HID "PRP0001" -void acpi_init_properties(struct acpi_device *adev); +void acpi_init_properties(struct acpi_device *adev, + struct list_head *mipi_img_head); void acpi_free_properties(struct acpi_device *adev); #ifdef CONFIG_X86 diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 23507d29f000..1096cdbf3d28 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -945,7 +945,7 @@ struct acpi_device *acpi_add_power_resource(acpi_handle handle) device = &resource->device; acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER, - acpi_release_power_resource); + acpi_release_power_resource, NULL); mutex_init(&resource->resource_lock); INIT_LIST_HEAD(&resource->list_node); INIT_LIST_HEAD(&resource->dependents); diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 08831ffba26c..1892787e73a6 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -62,10 +62,12 @@ static const guid_t buffer_prop_guid = GUID_INIT(0xedb12dd0, 0x363d, 0x4085, 0xa3, 0xd2, 0x49, 0x52, 0x2c, 0xa1, 0x60, 0xc4); -static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, +static bool acpi_enumerate_nondev_subnodes(struct acpi_device *device, + acpi_handle scope, union acpi_object *desc, struct acpi_device_data *data, - struct fwnode_handle *parent); + struct fwnode_handle *parent, + struct list_head *mipi_img_head); static bool acpi_extract_properties(acpi_handle handle, union acpi_object *desc, struct acpi_device_data *data); @@ -103,11 +105,12 @@ static bool acpi_nondev_subnode_extract(union acpi_object *desc, */ status = acpi_get_parent(handle, &scope); if (ACPI_SUCCESS(status) - && acpi_enumerate_nondev_subnodes(scope, desc, &dn->data, - &dn->fwnode)) + && acpi_enumerate_nondev_subnodes(NULL, scope, desc, + &dn->data, &dn->fwnode, + NULL)) result = true; - } else if (acpi_enumerate_nondev_subnodes(NULL, desc, &dn->data, - &dn->fwnode)) { + } else if (acpi_enumerate_nondev_subnodes(NULL, NULL, desc, &dn->data, + &dn->fwnode, NULL)) { result = true; } @@ -163,11 +166,14 @@ static bool acpi_nondev_subnode_ok(acpi_handle scope, return acpi_nondev_subnode_data_ok(handle, link, list, parent); } -static bool acpi_add_nondev_subnodes(acpi_handle scope, +static bool acpi_add_nondev_subnodes(struct acpi_device *device, + acpi_handle scope, union acpi_object *links, struct list_head *list, - struct fwnode_handle *parent) + struct fwnode_handle *parent, + struct list_head *mipi_img_head) { + bool has_mipi_img_nodes = false; bool ret = false; int i; @@ -188,6 +194,13 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope, /* The second one may be a string, a reference or a package. */ switch (link->package.elements[1].type) { case ACPI_TYPE_STRING: + if (!has_mipi_img_nodes && mipi_img_head && + !strncmp(MIPI_IMG_PORT_PREFIX, + link->package.elements[0].string.pointer, + strlen(MIPI_IMG_PORT_PREFIX))) { + acpi_bus_device_postpone(device, mipi_img_head); + has_mipi_img_nodes = true; + } result = acpi_nondev_subnode_ok(scope, link, list, parent); break; @@ -211,10 +224,12 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope, return ret; } -static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, +static bool acpi_enumerate_nondev_subnodes(struct acpi_device *device, + acpi_handle scope, union acpi_object *desc, struct acpi_device_data *data, - struct fwnode_handle *parent) + struct fwnode_handle *parent, + struct list_head *mipi_img_head) { int i; @@ -238,8 +253,9 @@ static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, if (!guid_equal((guid_t *)guid->buffer.pointer, &ads_guid)) continue; - return acpi_add_nondev_subnodes(scope, links, &data->subnodes, - parent); + return acpi_add_nondev_subnodes(device, scope, links, + &data->subnodes, parent, + mipi_img_head); } return false; @@ -533,7 +549,8 @@ static bool acpi_extract_properties(acpi_handle scope, union acpi_object *desc, return !list_empty(&data->properties); } -void acpi_init_properties(struct acpi_device *adev) +void acpi_init_properties(struct acpi_device *adev, + struct list_head *mipi_img_head) { struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; struct acpi_hardware_id *hwid; @@ -567,8 +584,9 @@ void acpi_init_properties(struct acpi_device *adev) if (acpi_of) acpi_init_of_compatible(adev); } - if (acpi_enumerate_nondev_subnodes(adev->handle, buf.pointer, - &adev->data, acpi_fwnode_handle(adev))) + if (acpi_enumerate_nondev_subnodes(adev, adev->handle, buf.pointer, + &adev->data, acpi_fwnode_handle(adev), + mipi_img_head)) adev->data.pointer = buf.pointer; if (!adev->data.pointer) { diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index bf0645854cf1..a3ad0060c2fc 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1774,7 +1774,8 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device) } void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, - int type, void (*release)(struct device *)) + int type, void (*release)(struct device *), + struct list_head *mipi_img_head) { struct acpi_device *parent = acpi_find_parent_acpi_dev(handle); @@ -1788,7 +1789,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, acpi_set_device_status(device, ACPI_STA_DEFAULT); acpi_device_get_busid(device); acpi_set_pnp_ids(handle, &device->pnp, type); - acpi_init_properties(device); + acpi_init_properties(device, mipi_img_head); acpi_bus_get_flags(device); device->flags.match_driver = false; device->flags.initialized = true; @@ -1827,7 +1828,8 @@ static void acpi_scan_init_status(struct acpi_device *adev) } static int acpi_add_single_object(struct acpi_device **child, - acpi_handle handle, int type, bool dep_init) + acpi_handle handle, int type, bool dep_init, + struct list_head *mipi_img_head) { struct acpi_device *device; bool release_dep_lock = false; @@ -1837,7 +1839,9 @@ static int acpi_add_single_object(struct acpi_device **child, if (!device) return -ENOMEM; - acpi_init_device_object(device, handle, type, acpi_device_release); + acpi_init_device_object(device, handle, type, acpi_device_release, + mipi_img_head); + /* * Getting the status is delayed till here so that we can call * acpi_bus_get_status() and use its quirk handling. Note that @@ -2048,16 +2052,20 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) } /** - * struct acpi_postponed_handle - A postponed ACPI handle + * struct acpi_postponed_handle - A postponed ACPI handle or device * @list: Entry in a postponed list * @handle: The postponed handle + * @device: The postponed device * - * One such entry represents an ACPI handle the scanning of which has been - * postponed. + * One such entry represents an ACPI handle or an ACPI device the scanning of + * which has been postponed. */ struct acpi_postponed_handle { struct list_head list; - acpi_handle handle; + union { + acpi_handle handle; + struct acpi_device *device; + }; }; /** @@ -2080,6 +2088,26 @@ static void acpi_bus_handle_postpone(acpi_handle handle, struct list_head *head) list_add(&ph->list, head); } +/** + * acpi_bus_device_postpone - Add an ACPI device to a given postponed list + * @device: The ACPI device + * @head: Postponed list head + * + * Add a given ACPI device to a list of ACPI objects for which the creation + * of the device objects is to be postponed. + */ +void acpi_bus_device_postpone(struct acpi_device *device, struct list_head *head) +{ + struct acpi_postponed_handle *ph; + + ph = kzalloc(sizeof(*ph), GFP_KERNEL); + if (!ph) + return; + + ph->device = device; + list_add(&ph->list, head); +} + static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass, struct acpi_scan_context *ctx) { @@ -2131,7 +2159,8 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass, * If first_pass is true at this point, the device has no dependencies, * or the creation of the device object would have been postponed above. */ - acpi_add_single_object(&device, handle, type, !first_pass); + acpi_add_single_object(&device, handle, type, !first_pass, + &ctx->mipi_img_head); if (!device) return AE_CTRL_DEPTH; @@ -2484,6 +2513,7 @@ int acpi_bus_scan(acpi_handle handle) { struct acpi_scan_context ctx = { .postponed_head = LIST_HEAD_INIT(ctx.postponed_head), + .mipi_img_head = LIST_HEAD_INIT(ctx.mipi_img_head), .csi2.crs_csi2_head = LIST_HEAD_INIT(ctx.csi2.crs_csi2_head), }; struct acpi_postponed_handle *ph, *tmp_ph; @@ -2517,13 +2547,25 @@ int acpi_bus_scan(acpi_handle handle) acpi_bus_scan_crs_csi2(&ctx.csi2); acpi_bus_scan_crs_csi2_release(&ctx.csi2.crs_csi2_head); + /* + * Initialise software nodes for devices that have MIPI DisCo for + * Imaging related properties. + */ + list_for_each_entry_safe(ph, tmp_ph, &ctx.mipi_img_head, list) { + list_del(&ph->list); + acpi_init_swnodes(ph->device); + kfree(ph); + } + acpi_bus_attach(ctx.device, (void *)true); /* - * Proceed to register ACPI devices that were postponed due to _DEP - * objects during the namespace walk. + * Proceed to register ACPI devices that were postponed due to _CRS CSI2 + * resources or _DEP objects during the namespace walk. */ list_for_each_entry_safe(ph, tmp_ph, &ctx.postponed_head, list) { + struct acpi_postponed_handle *pm, *tmp_pm; + list_del(&ph->list); /* Set device NULL here to obtain the root for this sub-tree. */ ctx.device = NULL; @@ -2537,6 +2579,16 @@ int acpi_bus_scan(acpi_handle handle) acpi_walk_namespace(ACPI_TYPE_ANY, ph->handle, ACPI_UINT32_MAX, acpi_bus_check_add_2, NULL, (void *)&ctx, NULL); + /* + * Initialise software nodes for devices that have MIPI DisCo + * for Imaging related properties but which were postponed + * because of _DEP. + */ + list_for_each_entry_safe(pm, tmp_pm, &ctx.mipi_img_head, list) { + list_del(&pm->list); + acpi_init_swnodes(pm->device); + kfree(pm); + } if (ctx.device) acpi_bus_attach(ctx.device, NULL); kfree(ph); @@ -2597,7 +2649,7 @@ int acpi_bus_register_early_device(int type) struct acpi_device *device = NULL; int result; - result = acpi_add_single_object(&device, NULL, type, false); + result = acpi_add_single_object(&device, NULL, type, false, NULL); if (result) return result; @@ -2612,7 +2664,7 @@ static void acpi_bus_scan_fixed(void) struct acpi_device *adev = NULL; acpi_add_single_object(&adev, NULL, ACPI_BUS_TYPE_POWER_BUTTON, - false); + false, NULL); if (adev) { adev->flags.match_driver = true; if (device_attach(&adev->dev) >= 0) @@ -2626,7 +2678,7 @@ static void acpi_bus_scan_fixed(void) struct acpi_device *adev = NULL; acpi_add_single_object(&adev, NULL, ACPI_BUS_TYPE_SLEEP_BUTTON, - false); + false, NULL); if (adev) { adev->flags.match_driver = true; if (device_attach(&adev->dev) < 0) From patchwork Wed Mar 29 10:09:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668472 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 4CB80C761A6 for ; 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X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256250" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256250" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517724" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517724" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:01 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 34A4812259B; Wed, 29 Mar 2023 13:09:59 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 07/10] ACPI: property: Dig "rotation" property for devices with CSI2 _CRS Date: Wed, 29 Mar 2023 13:09:48 +0300 Message-Id: <20230329100951.1522322-8-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Dig "rotation" property value for devices with _CRS CSI2 resource descriptor. The value comes from _PLD (physical location of device) object, if it exists for the device. This way camera sensor drivers that know the "rotation" property do not need to care about _PLD on ACPI. Signed-off-by: Sakari Ailus --- drivers/acpi/mipi.c | 17 +++++++++++++++++ include/acpi/acpi_bus.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c index 03079f78bd2c..0232cc123ead 100644 --- a/drivers/acpi/mipi.c +++ b/drivers/acpi/mipi.c @@ -652,10 +652,12 @@ static void init_port_csi2_remote(struct acpi_device *device, */ void acpi_init_swnodes(struct acpi_device *device) { + struct fwnode_handle *fwnode = acpi_fwnode_handle(device); struct acpi_device_software_nodes *ads; struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER }; acpi_handle handle = acpi_device_handle(device); struct fwnode_handle *primary; + unsigned int prop_index = 0; acpi_status status; unsigned int i; int ret; @@ -664,6 +666,21 @@ void acpi_init_swnodes(struct acpi_device *device) if (!ads) return; + /* + * Check if "rotation" property exists and if it doesn't but there's a + * _PLD object, then get the rotation value from there. + */ + if (!fwnode_property_present(fwnode, "rotation")) { + struct acpi_pld_info *pld; + + status = acpi_get_physical_device_location(handle, &pld); + if (ACPI_SUCCESS(status)) { + ads->dev_props[NEXT_PROPERTY(prop_index, DEV_ROTATION)] = + PROPERTY_ENTRY_U32("rotation", pld->rotation * 45U); + kfree(pld); + } + } + status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); if (ACPI_FAILURE(status)) { acpi_handle_warn(handle, "cannot get path name\n"); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 29d1e4d49d0c..83a89797a122 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -361,6 +361,7 @@ struct acpi_device_data { struct acpi_gpio_mapping; enum acpi_device_swnode_dev_props { + ACPI_DEVICE_SWNODE_DEV_ROTATION, ACPI_DEVICE_SWNODE_DEV_NUM_OF, ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES }; From patchwork Wed Mar 29 10:09:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668471 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 93541C6FD18 for ; Wed, 29 Mar 2023 10:10:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231534AbjC2KKT (ORCPT ); Wed, 29 Mar 2023 06:10:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231478AbjC2KKL (ORCPT ); Wed, 29 Mar 2023 06:10:11 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74B48468E; Wed, 29 Mar 2023 03:10:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084605; x=1711620605; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GHy945d5K+XuXB2osjg/kL6H844bbEPqoNXKHXpzLKs=; b=lAkTuF7IsRlbB3nDShs8/vuEfB9ZAPiepwFfC3O6PCyaWnafxf3xQdtJ PcNCB5UXe5cCdPs62+fz1rVKLWyl/euPWZp6MkiuR8JTKUq5L1QKcAIAl j+GR04LuYTN25t2rkncBUPQ7A3NSYlm27MDg8LfmkhT+B414ED+UpGG1K bhguYSZ7bNB7+KYmhZ5rtz6MEzfcBXtfO0UBW4SnnggizdVL4EmyHNgxa MC4PfylhTnVjcax2VtZZLhc+EBZj7ru382J/OvC3yBLNMLy1/+iQTqELB MD1xFtZ8M+COtLz4H1DM4kzzwAYWuj2/ID1k/UdorAbiFFUyf2z6J6gLU Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256254" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256254" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517738" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517738" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:03 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 088D6122636; Wed, 29 Mar 2023 13:09:59 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 08/10] ACPI: property: Rename parsed MIPI DisCo for Imaging properties Date: Wed, 29 Mar 2023 13:09:49 +0300 Message-Id: <20230329100951.1522322-9-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org MIPI DisCo for Imaging defines properties for sensor-adjacent devices such as EEPROM, LED flash or lens VCM as either device or sub-node references. This is compliant with existing DT definitions apart from property names. Rename parsed MIPI-defined properties so drivers will have a unified view of them as defined in DT and already parsed by drivers. This can be done in-place as the MIPI-defined property strings are always longer than the DT one. This also results in loss of constness in parser function arguments. Individual bindings to devices could define the references differently between MIPI DisCo for Imaging and DT, in terms of device or sub-node references. This will still need to be handled in the drivers themselves. Signed-off-by: Sakari Ailus --- drivers/acpi/internal.h | 1 + drivers/acpi/mipi.c | 36 ++++++++++++++++++++++++++++++++++++ drivers/acpi/property.c | 22 ++++++++++++---------- 3 files changed, 49 insertions(+), 10 deletions(-) diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 36799cde281c..ef5af9fd9ffa 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -318,5 +318,6 @@ void acpi_bus_scan_check_crs_csi2(acpi_handle handle, struct acpi_scan_context * void acpi_bus_scan_crs_csi2_release(struct list_head *crs_csi2_handles); void acpi_bus_scan_crs_csi2(struct acpi_scan_context_csi2 *ctx); void acpi_init_swnodes(struct acpi_device *device); +void acpi_properties_prepare_mipi(union acpi_object *elements); #endif /* _ACPI_INTERNAL_H_ */ diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c index 0232cc123ead..576301b9bb89 100644 --- a/drivers/acpi/mipi.c +++ b/drivers/acpi/mipi.c @@ -714,3 +714,39 @@ void acpi_init_swnodes(struct acpi_device *device) primary = acpi_fwnode_handle(device); primary->secondary = software_node_fwnode(ads->nodes); } + +static const struct mipi_disco_prop { + const char *mipi_prop; + const char *dt_prop; +} mipi_disco_props[] = { + { "mipi-img-lens-focus", "lens-focus" }, + { "mipi-img-flash-leds", "flash-leds" }, + { "mipi-img-clock-frequency", "clock-frequency" }, + { "mipi-img-led-max-current", "led-max-microamp" }, + { "mipi-img-flash-max-current", "flash-max-microamp" }, + { "mipi-img-flash-max-timeout", "flash-max-timeout-us" }, +}; + +/** + * acpi_properties_prepare_mipi - Rename MIPI properties as commin DT ones + * + * @elements: ACPI object containing _DSD properties for a device node + * + * Renames MIPI-defined properties as common DT ones. The pre-requisite is that + * the names of all such MIPI properties are no longer than the corresponding DT + * ones. + */ +void acpi_properties_prepare_mipi(union acpi_object *elements) +{ + char *e0 = elements[0].string.pointer; + unsigned int i; + + /* Replace MIPI DisCo for Imaging property names with DT equivalents. */ + for (i = 0; i < ARRAY_SIZE(mipi_disco_props); i++) { + if (!strcmp(mipi_disco_props[i].mipi_prop, e0)) { + WARN_ON(strscpy(e0, mipi_disco_props[i].dt_prop, + elements[0].string.length) < 0); + break; + } + } +} diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 1892787e73a6..541bda2c118f 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -127,7 +127,7 @@ static bool acpi_nondev_subnode_extract(union acpi_object *desc, } static bool acpi_nondev_subnode_data_ok(acpi_handle handle, - const union acpi_object *link, + union acpi_object *link, struct list_head *list, struct fwnode_handle *parent) { @@ -148,7 +148,7 @@ static bool acpi_nondev_subnode_data_ok(acpi_handle handle, } static bool acpi_nondev_subnode_ok(acpi_handle scope, - const union acpi_object *link, + union acpi_object *link, struct list_head *list, struct fwnode_handle *parent) { @@ -292,22 +292,24 @@ static bool acpi_property_value_ok(const union acpi_object *value) return false; } -static bool acpi_properties_format_valid(const union acpi_object *properties) +static bool acpi_properties_prepare(union acpi_object *properties) { - int i; + unsigned int i; for (i = 0; i < properties->package.count; i++) { - const union acpi_object *property; + union acpi_object *property = &properties->package.elements[i]; + union acpi_object *elements = property->package.elements; - property = &properties->package.elements[i]; /* * Only two elements allowed, the first one must be a string and * the second one has to satisfy certain conditions. */ - if (property->package.count != 2 - || property->package.elements[0].type != ACPI_TYPE_STRING - || !acpi_property_value_ok(&property->package.elements[1])) + if (property->package.count != 2 || + elements[0].type != ACPI_TYPE_STRING || + !acpi_property_value_ok(&elements[1])) return false; + + acpi_properties_prepare_mipi(elements); } return true; } @@ -539,7 +541,7 @@ static bool acpi_extract_properties(acpi_handle scope, union acpi_object *desc, * We found the matching GUID. Now validate the format of the * package immediately following it. */ - if (!acpi_properties_format_valid(properties)) + if (!acpi_properties_prepare(properties)) continue; acpi_data_add_props(data, (const guid_t *)guid->buffer.pointer, From patchwork Wed Mar 29 10:09:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668760 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 81658C74A5B for ; Wed, 29 Mar 2023 10:10:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231523AbjC2KKQ (ORCPT ); Wed, 29 Mar 2023 06:10:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231506AbjC2KKL (ORCPT ); Wed, 29 Mar 2023 06:10:11 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02D67469C; Wed, 29 Mar 2023 03:10:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084606; x=1711620606; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=h64xUav8wBcQemeG9qzU+lo83YD2+PtgrOwwLLWQClw=; b=cRb0OoqFUN/mGBXyO8+YT/kseJv8T0f/2cnrIgZoNlQoQBKDX7qe6Ty2 l/pb28UFC289An2S2VYHkLzxPi/OufkDWWTu7Y7TqgVE7yXzWr3t58Bth ssPVH0nceRZ+bjJPqgSYRLoUTsM+8EZXf1UXKSiQdkH2g9NyHYhqnPHFa d6gZwdFZ9EvsWdO8i8eG4EewNDkRZ4VgRa9ry+wk+L+n/U2T1ykc0uF0V 5yrWMwOMCUnesFVmKQNhxx5UuB9M2/Dje+nb9ROsFnGTRNExx1jVemp4d Z4CyvjHEag2hRlAamNkvUpX6DXz+YGC/YQF3D7eNeZZB5egmuBwv1RIul Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256266" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256266" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517745" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517745" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:04 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 3371B1227DF; Wed, 29 Mar 2023 13:10:00 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 09/10] ACPI: property: Skip MIPI property table without "mipi-img" prefix Date: Wed, 29 Mar 2023 13:09:50 +0300 Message-Id: <20230329100951.1522322-10-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org For all _DSD properties, skip going through the MIPI DisCo for Imaging property name substitution table if the property doesn't have "mipi-img-" prefix. Signed-off-by: Sakari Ailus --- drivers/acpi/mipi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c index 576301b9bb89..90ad4b43f008 100644 --- a/drivers/acpi/mipi.c +++ b/drivers/acpi/mipi.c @@ -715,6 +715,8 @@ void acpi_init_swnodes(struct acpi_device *device) primary->secondary = software_node_fwnode(ads->nodes); } +#define MIPI_IMG_PREFIX "mipi-img-" + static const struct mipi_disco_prop { const char *mipi_prop; const char *dt_prop; @@ -741,6 +743,9 @@ void acpi_properties_prepare_mipi(union acpi_object *elements) char *e0 = elements[0].string.pointer; unsigned int i; + if (!str_has_prefix(elements[0].string.pointer, MIPI_IMG_PREFIX)) + return; + /* Replace MIPI DisCo for Imaging property names with DT equivalents. */ for (i = 0; i < ARRAY_SIZE(mipi_disco_props); i++) { if (!strcmp(mipi_disco_props[i].mipi_prop, e0)) { From patchwork Wed Mar 29 10:09:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 668759 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 4A636C74A5B for ; Wed, 29 Mar 2023 10:10:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231547AbjC2KKk (ORCPT ); Wed, 29 Mar 2023 06:10:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231530AbjC2KKL (ORCPT ); Wed, 29 Mar 2023 06:10:11 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CF0E1BFE; Wed, 29 Mar 2023 03:10:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680084607; x=1711620607; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IfGacDFJLLqr9f6JjzSb6VFnxUdNv5+L5s27tHa+Ivg=; b=dKVyXU7aNRHhyklrRWeIQ13EgP4B7jB30AQqYMk5QDrDRX3rjVhpONSl 90RhbuVQG2vW4d5Iw+7qbut7eXMaVYZ0r4K6njADkoo2dw25j+XpMZx3J GnGG5YNHn5Dmg2hHVTvGwCz8fMtS2dBc/BfuTTVyKPzi6AuEqVCmoCHHB ynQYTDscpcEBii6SLYNurRoub6jCA6TmekQFhPGxod56C34NQ0JDcmruz Y9t3h9tX+WpbrVcVhToMOdmZe6S0i1Yj4vP6cUU0sYyJzwTJKlJrhV8Te 3vxBbVHkOLj7JQxpJicmwq5WLUoLQfWbm9h20mqU27G0KXXMQo4INu3Jm Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="343256269" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="343256269" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10663"; a="773517755" X-IronPort-AV: E=Sophos;i="5.98,300,1673942400"; d="scan'208";a="773517755" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2023 03:10:05 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 2E0A8122809; Wed, 29 Mar 2023 13:10:02 +0300 (EEST) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: linux-media@vger.kernel.org, rafael@kernel.org, andriy.shevchenko@linux.intel.com, heikki.krogerus@linux.intel.com Subject: [PATCH v8 10/10] ACPI: property: Document _CRS CSI-2 and DisCo for Imaging support Date: Wed, 29 Mar 2023 13:09:51 +0300 Message-Id: <20230329100951.1522322-11-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> References: <20230329100951.1522322-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Document how ACPI _CRS CSI-2 and DisCo for Imaging works. It's non-trivial so such documentation can be useful. Signed-off-by: Sakari Ailus --- drivers/acpi/mipi.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c index 90ad4b43f008..926d39948268 100644 --- a/drivers/acpi/mipi.c +++ b/drivers/acpi/mipi.c @@ -9,6 +9,43 @@ * Also see . * * Copyright (C) 2023 Intel Corporation + * + * _CRS CSI-2 descriptors, as defined starting from ACPI 6.4 [1], contain + * information on cross-device CSI-2 bus configuration. The descriptors are + * located under transmitter devices, and the receiver devices have no direct + * way to access them even if the information in these descriptors is equally + * important for receivers. This information is amended with MIPI DisCo for + * Imaging [2] specification that defines _DSD data nodes and properties. + * + * The support for these is based on two-fold approach, firstly renaming + * properties where semantics matches and secondly gathering information to + * generate properties using information gathered from various sources. The + * former is trivial (see acpi_properties_prepare_mipi() at the end of the + * file) whereas the latter requires a more elaborate explanation. + * + * acpi_bus_scan_crs_csi2() scans an ACPI bus for devices with _CRS CSI-2 + * descriptors and stores them to a linked list. This is done as traversing just + * this list is much smaller task than the entire DSDT. This list is then used + * to figure out how much memory is needed for swnodes related to a given ACPI + * device (handle). Further on, the same function sets the property values for + * the properties the values of which are obtained from the _CRS CSI-2 + * descriptor. The information is stored into another list where the information + * can be looked up based on device's acpi_handle as the struct acpi_device + * isn't available yet at this point (and could not, as cross-device references + * need to be set up before the devices are available for drivers to probe). + * + * For each struct acpi_device, acpi_init_swnodes() further obtains information + * required to find out the values for the rest of the properties needed by + * drivers. This includes all port and endpoint properties as the node + * structures used by DT graphs and DisCo for Imaging are different. Finally the + * function registers software nodes for the device and sets the secondary + * pointer for the ACPI device's fwnode. + * + * Access to data the structures is serialised using acpi_scan_lock in scan.c. + * + * [1] https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf + * + * [2] https://www.mipi.org/specifications/mipi-disco-imaging */ #include