From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 DE1399476 for ; Tue, 22 Apr 2025 09:12:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745313149; cv=none; b=RONl+3xtEIZJKHGkEDrkTDQ0wnv2lpYV3wTrRV9qvV7XjbJpq83qpy6GirF9EL5p2p7p1k5HEWKy598pWcJizJOmp2o50x1nWJuQhcU7YKdOG9e272KEv6RWaKXaQTZO9HPZIpVs7PADMzfp5soicHhdCbDfg5t97pEhP+QV+UM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745313149; c=relaxed/simple; bh=bQ7rJXa8I5vGcBz0putGDcL88Lrgoq6U0bD6AU0H/k8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LoK0R6lvU2dpA8cdlEsHwDD33S5K7crg7iWcT0gGjqgau0K/hW38bkR6hulYWTb5Y3dIJTz85Njo47ltJWNOvHuaKbb8UwNSFg9In8c7JvNvYKuPOblgKFYggvRKQByC3okDCKCpnddNyNpSI0Tz2X33hJQECCaLlDfmLSkgM7Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=W4IBtDI6; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="W4IBtDI6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=YaCmKJkJpIfCrNBse2f9NA8rGjAA6dTaAoWys68Zq10=; b=W4IBtDI6rJA6ACYTJ3fIsHPZZR 7Yv7jpwuN/NdTjTzLFhOJLFot4ytVYDZ/1JP3z/+LmVn6hyqYtOBZvzKNYczF80SKTS8TBSk6I+qt Fpmkx0vt4pAnAkSy8X5MUKtQYjZivHH/YRTYbRFjQPX9YWy3iU8eSeO2YXupAVxPcw94jqZIW58Gq XkxjsPo4EJEx0/HcdEyVrOFNhd52OiEi6C3+gKhP+jxWQG6MKp3hwSlQKpHw8Au7Soxfwi2uXWmgr Lq9gwBZlZ7l+rCj9j/7HRgjNq9j8YIevHPFARm8QDshzf27mQo/7CaRgPh7nX7yL/03WBLIckQR3v q3zK6RFw==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.1 #2 (Red Hat Linux)) id 1u79fz-0000000BAc0-0Pkl; Tue, 22 Apr 2025 09:12:23 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 4E18A3003C4; Tue, 22 Apr 2025 11:12:22 +0200 (CEST) Date: Tue, 22 Apr 2025 11:12:22 +0200 From: Peter Zijlstra To: Mika Westerberg Cc: andreas.noever@gmail.com, michael.jamet@intel.com, westeri@kernel.org, YehezkelShB@gmail.com, linux-usb@vger.kernel.org Subject: Re: Thunderbolt display chaining Message-ID: <20250422091222.GB14170@noisy.programming.kicks-ass.net> References: <20250421163549.GA40412@noisy.programming.kicks-ass.net> <20250422050501.GF88033@black.fi.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250422050501.GF88033@black.fi.intel.com> On Tue, Apr 22, 2025 at 08:05:01AM +0300, Mika Westerberg wrote: > You can remedy this by not daisy chaining if you have multiple ports: > > TGL <-> M > ^ > | > v > M > > Let me know if you need more information. Ah, thanks. I tried googling things but stuff like this just wasn't easy to find. Yes, this seems to work. I can even drive both panels at 120Hz this way. Now I've got to go order a second long TB cable :-) Thanks!