From patchwork Mon Jan 29 06:10:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 10189355 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6E6AD60375 for ; Mon, 29 Jan 2018 06:10:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4E7C7287E7 for ; Mon, 29 Jan 2018 06:10:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 42950287F2; Mon, 29 Jan 2018 06:10:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF60E287E7 for ; Mon, 29 Jan 2018 06:10:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751219AbeA2GKS (ORCPT ); Mon, 29 Jan 2018 01:10:18 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:44366 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751032AbeA2GKS (ORCPT ); Mon, 29 Jan 2018 01:10:18 -0500 Received: from [175.41.48.77] (helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1eg2dz-0002ae-Vh; Mon, 29 Jan 2018 06:10:16 +0000 From: Kai-Heng Feng To: rjw@rjwysocki.net, lenb@kernel.org Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Kai-Heng Feng , Mario Limonciello Subject: [PATCH] ACPI: Parse entire table as a term_list for Dell XPS 9570 and Precision M5530 Date: Mon, 29 Jan 2018 14:10:11 +0800 Message-Id: <20180129061011.11214-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.15.1 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The i2c touchpad on Dell XPS 9570 and Precision M5530 doesn't work out of box. The touchpad relies on its _INI method to update its _HID value from XXXX0000 to SYNA2393. Also, the _STA relies on value of I2CN to report correct status. Set acpi_gbl_parse_table_as_term_list so the value of I2CN can be correctly set up, and _INI can get run. The ACPI table in this machine is designed to get parsed this way. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198515 Cc: Mario Limonciello Signed-off-by: Kai-Heng Feng --- drivers/acpi/bus.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 4d0979e02a28..4da34d67e23d 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -88,6 +86,45 @@ static const struct dmi_system_id dsdt_dmi_table[] __initconst = { }; #endif +#ifdef CONFIG_X86 +static int set_gbl_term_list(const struct dmi_system_id *id) +{ + pr_notice("%s detected - parse the entire table as a term_list\n", + id->ident); + acpi_gbl_parse_table_as_term_list = 1; + return 0; +} + +static const struct dmi_system_id gbl_term_list_dmi_table[] __initconst = { + /* + * Touchpad on Dell XPS 9570/Precision M5530 doesn't work under I2C + * mode. + * https://bugzilla.kernel.org/show_bug.cgi?id=198515 + */ + { + .callback = set_gbl_term_list, + .ident = "Dell Precision M5530", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Precision M5530"), + }, + }, + { + .callback = set_gbl_term_list, + .ident = "Dell XPS 15 9570", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9570"), + }, + }, + {} +}; +#else +static const struct dmi_system_id gbl_term_list_dmi_table[] __initconst = { + {} +}; +#endif + /* -------------------------------------------------------------------------- Device Management -------------------------------------------------------------------------- */ @@ -1007,6 +1046,8 @@ void __init acpi_early_init(void) */ dmi_check_system(dsdt_dmi_table); + dmi_check_system(gbl_term_list_dmi_table); + status = acpi_reallocate_root_table(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX