From mboxrd@z Thu Jan 1 00:00:00 1970 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=-4.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 12DCEC433B4 for ; Sat, 8 May 2021 01:09:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEE7A6044F for ; Sat, 8 May 2021 01:09:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229775AbhEHBKl (ORCPT ); Fri, 7 May 2021 21:10:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:55502 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbhEHBKl (ORCPT ); Fri, 7 May 2021 21:10:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id A90986044F for ; Sat, 8 May 2021 01:09:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620436180; bh=XnRPJFmDcHD1hifXtBuES5tZt+PM8PGAzskr3hGRa2I=; h=From:To:Subject:Date:In-Reply-To:References:From; b=QXLiZUrVBvF4kU7Uy5JIQHP7JzVs7RoHlrlTkHbFNTwWcNHEkdKTzeNOUOdF8ka1M 2qoOcNdzXq9SwABI9qFWiZAU5CpXCkuhzjSRxfvcTtn38GmG09KMuxwFt8Upr0kiu/ Gt8sWCQF994u8XHS5uVFpdrPo6KY1nsz6WDUq73wRugOr/aZXsf2YwXdoSQIY9Baux B41uIjw7q8mbmbwrOuTONJMFRM+EF0sSGUnc4fec8CKYYmm+LReZnbJQ3v8afr6Oh4 cCbnogI7Drc6tvhefV9wd0mf7zJbwxNCTrpspsxidrppcuOwtzVr9/Uw1vluGFBcK2 bRbeZ+9M7n56Q== From: bugzilla-daemon@bugzilla.kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 212985] ideapad_acpi: VPC2004:00: DYTC interface is not available. platform_profile interface is unavailable Date: Sat, 08 May 2021 01:09:40 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Platform Specific/Hardware X-Bugzilla-Component: x86-64 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pobrn@protonmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: platform-driver-x86@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D212985 --- Comment #4 from Barnab=C3=A1s P=C5=91cze (pobrn@protonmail.com) --- > If I'm understanding correctly, you're saying to check the disassembled A= CPI > tables, right? Yes, exactly. >From this part: Method (DYTC, 1, Serialized) { ITSV =3D Zero ITSM =3D Zero Local0 =3D Zero Local1 =3D (Arg0 & 0x01FF) Local2 =3D (Arg0 & 0xFFFFFE00) Switch (Local1) { Case (Zero) { If (!Local2) { Local0 |=3D One Local0 |=3D 0x0100 Local0 |=3D Zero Local0 |=3D 0x40000000 } Else { Local0 |=3D Zero Local0 |=3D 0x04 } } it **seems to me** that only DYTC v4 is supported on that model - although = I'm not sure. The ideapad_acpi driver will only expose the platform_profile functionality if it finds DYTC v5 or newer. The code was adapted from the thinkpad_acpi driver, and the platform_profile support was contributed to t= hat driver by Lenovo employee Mark Pearson. I cannot remember the exact reason = why earlier versions are not supported, you could possibly write to the PDx86 mailing list (platform-driver-x86 at vger.kernel.org) and CC him if you wan= t to know more; or search back on lore.kernel.org. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=