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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2B281CD98F1 for ; Wed, 17 Jun 2026 10:54:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8151710E9BD; Wed, 17 Jun 2026 10:54:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="WncROHv2"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 444F210E9BD; Wed, 17 Jun 2026 10:54:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1781693677; x=1813229677; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=6cQoc0XDwgSC3rq88jE9ZOu9X4zh8mv9B+GVkjwgNbw=; b=WncROHv2CJI50sqaakX1bs+7wUEmtor3Sh1E8xN377UHyechN7+GBfD/ ZF0p8ESlmtSJqzAU2IRd+nKg4CH+SrXiUY959XmAGgKqT9QTZPuzeBiQq Dh02/wzuE/9c6RgV0099LqJWNtMPHbETEyBkYZwM5jMO27YPXsFzZypqO pJdQ45iGlMjcwK6FXI9tu6RyFbxfatRpQnec8vQBKeUuuDLuDQukNaorG voQIZDIVbv3XslZiKXHqeSEHoIUHBdxrL+eb+jaVT6Kj4tYMkG5jywEVe vO3AMBNY1HxMOrM2SEBiSqAIx7U4bfYej1Bc5OO5cwnUGrSYE2X6t3fLS w==; X-CSE-ConnectionGUID: Lh8ZM0wXQpyJj/J57ac9qA== X-CSE-MsgGUID: PctRMx9FQnqbXtTh3ZZ9Pg== X-IronPort-AV: E=McAfee;i="6800,10657,11819"; a="82573613" X-IronPort-AV: E=Sophos;i="6.24,209,1774335600"; d="scan'208";a="82573613" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2026 03:54:37 -0700 X-CSE-ConnectionGUID: kZdxgdTaTEWgttFmkm0QHQ== X-CSE-MsgGUID: REd9SseKSFm2YWK0wPnkbQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,209,1774335600"; d="scan'208";a="245129648" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa007.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2026 03:54:35 -0700 Date: Wed, 17 Jun 2026 12:54:32 +0200 From: Raag Jadav To: Zhan Wei Cc: matthew.brost@intel.com, thomas.hellstrom@linux.intel.com, rodrigo.vivi@intel.com, corbet@lwn.net, skhan@linuxfoundation.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4] drm/xe/hwmon: document DG2 fan speed reporting quirk Message-ID: References: <20260602161707.18922-1-zhanwei919@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260602161707.18922-1-zhanwei919@gmail.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Wed, Jun 03, 2026 at 12:17:07AM +0800, Zhan Wei wrote: > On DG2 the driver always shows two fan channels, because the > FSC_READ_NUM_FANS command does not work on some cards. OEMs decide how > the fans map to tach channels, so two fans can share one tach line. > When that happens, the second channel reads 0 RPM even though the fan > is spinning. > > Note this on the fan2_input ABI entry so the steady 0 RPM is not > mistaken for a driver bug. > > Fixes: 28f79ac609de ("drm/xe/hwmon: expose fan speed") > Signed-off-by: Zhan Wei > Reviewed-by: Raag Jadav This one seems got lost in the noise. Any takers? Raag