From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7CE3B17BD3; Mon, 3 Feb 2025 08:46:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738572417; cv=none; b=mqkIrw1NOo+ix7L6f4RddkHzn1n2k5BiOUMhoIbpXESQLOe4rnWAJSEyLSEeG+fodUhSrSq2H8vZe4+Sk+5/zVLn6i+3Sbrp+5MsAM7QztnSJ8siuVDEBRMEYX/7X0q/2pjdB5pKFHvJsiXT64jpM8plj5Tn5+1UZWPDhVHWqCs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738572417; c=relaxed/simple; bh=fqj386jbnvAP8Wc097t+fxVqlw/NW6Vd1ziqwevgQek=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bq3fwb9/zz8N8KBM8/tufqMXTLfhwTPfG+53UfKMowqjfipLxxfrnZspkv+5KqXLIDT/52Ew2jOCKHa8VIyPJRQ2Gk5r1ZXYZ3VIwFjZrlWC0yIGgvgw9oZ+X7j5jK/zPJyb7TLy4JORT7B89+vKpaO1LGT3dMj97eRAr1juC3Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hVPfRfBx; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hVPfRfBx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1738572416; x=1770108416; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=fqj386jbnvAP8Wc097t+fxVqlw/NW6Vd1ziqwevgQek=; b=hVPfRfBxgrcxz/1m6jJX6x8yo1FpdCTIRX0IQ9O7HkzrA0gKOHFP5Urv 8sbTSO1mVpK3fkU30+Nk5x6o+wqAZM9OYFZrygBM9b/S7b2xJdCJyJ9PI Tpu8qt7xMaVlb+6RrnOMv0Xf45FRYqNaNmvqlpObcDaWSctGSDhDM4gi5 WZXWQRw1cDhtLME0dL3OITYsNzAAtXtDwI1h046xHy03eBfwtYcpBGRyK tvz8anTPspHGArzj9jBwDgEQvSvvZ9uLsZqcOxOyNNoa/MVFEVqWGrb33 RYt0SmgK+QAuTh1/L2xoZJPC/Dt5h2RQXi8L1EXdFEtgbHTwT7BCOdvSD g==; X-CSE-ConnectionGUID: B929w0srRB+FWFGcp/1RpA== X-CSE-MsgGUID: eZte649uReeWICfxO70cCw== X-IronPort-AV: E=McAfee;i="6700,10204,11334"; a="61526920" X-IronPort-AV: E=Sophos;i="6.13,255,1732608000"; d="scan'208";a="61526920" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Feb 2025 00:46:55 -0800 X-CSE-ConnectionGUID: nKpJUq1JQVOv0vQQY7pc9w== X-CSE-MsgGUID: 90lPz9VxSNKpfJGWtdDn7A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="141094075" Received: from black.fi.intel.com ([10.237.72.28]) by fmviesa001.fm.intel.com with ESMTP; 03 Feb 2025 00:46:53 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id 12117214; Mon, 03 Feb 2025 10:46:51 +0200 (EET) Date: Mon, 3 Feb 2025 10:46:51 +0200 From: Mika Westerberg To: Mohammad Rahimi Cc: andreas.noever@gmail.com, michael.jamet@intel.com, YehezkelShB@gmail.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] thunderbolt: Remove the TBT3 Not Supported bit Message-ID: <20250203084651.GF3713119@black.fi.intel.com> References: <20250203011842.13305-1-rahimi.mhmmd@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20250203011842.13305-1-rahimi.mhmmd@gmail.com> Hi, On Mon, Feb 03, 2025 at 01:17:47AM +0000, Mohammad Rahimi wrote: > Since USB4 v2 specification has removed the mandatory requirement to > support TBT3 on a USB4 Dock UFP, the TBT3 Not Supported bit is not > usable, as when it needs to be read there is no USB4 Link. > > This change was introduced in a "USB4 2.0 ENGINEERING CHANGE NOTICE > FORM" published in September 2024, titled "TBT3 Support on USB4 Dock > UFP". I think the USB4 v1 hardware still has this bit and since it is just debugging there is no harm keeping it around.