From patchwork Tue Apr 6 21:16:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 12185977 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44254C43460 for ; Tue, 6 Apr 2021 21:17:04 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 03FC461260 for ; Tue, 6 Apr 2021 21:17:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 03FC461260 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5A0A26E846; Tue, 6 Apr 2021 21:17:03 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5E29C6E846 for ; Tue, 6 Apr 2021 21:17:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617743821; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=KJUn2ssf/ULcrdCSKFDPTC4Gfd9s1AfVOAzFNeb3+Q4=; b=elUpygWO7DcBbzmVWyFB6JAmwM0xZ+sTMUi65tlZDDh0RLTdLz1yXOriuHdEKWs/U580Yy xqzweZW8/8N0I/PjNnQaNtAevjXdvShkSNvnUjUYhq4hXyMrcJId6VpV87ynXrAMC3iiJX xQT7HQU6vdIV3czlbv7TZt6HuFnsRpQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-410-vJX9QZhUPdig9HOkf3w2NA-1; Tue, 06 Apr 2021 17:16:57 -0400 X-MC-Unique: vJX9QZhUPdig9HOkf3w2NA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 100AA8030D6; Tue, 6 Apr 2021 21:16:56 +0000 (UTC) Received: from x1.localdomain (ovpn-112-11.ams2.redhat.com [10.36.112.11]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6465D6EF54; Tue, 6 Apr 2021 21:16:54 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , Len Brown , Zhang Rui Date: Tue, 6 Apr 2021 23:16:52 +0200 Message-Id: <20210406211653.182338-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Subject: [Intel-gfx] [PATCH 1/2] ACPI: utils: Add acpi_reduced_hardware() helper X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx , linux-acpi@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add a getter for the acpi_gbl_reduced_hardware variable so that modules can check if they are running on an ACPI reduced-hw platform or not. Signed-off-by: Hans de Goede --- drivers/acpi/utils.c | 11 +++++++++++ include/acpi/acpi_bus.h | 1 + include/linux/acpi.h | 5 +++++ 3 files changed, 17 insertions(+) diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index 682edd913b3b..4cb061d3169a 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -872,6 +872,17 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) } EXPORT_SYMBOL(acpi_dev_get_first_match_dev); +/** + * acpi_reduced_hardware - Return if this is an ACPI-reduced-hw machine + * + * Return true when running on an ACPI-reduced-hw machine, false otherwise. + */ +bool acpi_reduced_hardware(void) +{ + return acpi_gbl_reduced_hardware; +} +EXPORT_SYMBOL(acpi_reduced_hardware); + /* * acpi_backlight= handling, this is done here rather then in video_detect.c * because __setup cannot be used in modules. diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index f28b097c658f..d631cb52283e 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -78,6 +78,7 @@ acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev, bool acpi_dev_found(const char *hid); bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); +bool acpi_reduced_hardware(void); #ifdef CONFIG_ACPI diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 3bdcfc4401b7..e2e6db8313c8 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -748,6 +748,11 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) return NULL; } +static inline bool acpi_reduced_hardware(void) +{ + return false; +} + static inline void acpi_dev_put(struct acpi_device *adev) {} static inline bool is_acpi_node(const struct fwnode_handle *fwnode)