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[86.185.73.183]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49c605e4a2asm16585194f8f.39.2026.11.15.06.44.45 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Nov 2026 06:44:46 -0800 (PST) From: James R Taylor To: linux-usb@vger.kernel.org Subject: Re: thunderbolt: AMD Phoenix USB4 host advertises Gen3 Support=0 in SB LINK_CONF with TB5 device, link stuck at Gen2 Date: Sun, 15 Nov 2026 14:43:16 +0000 Message-ID: <1794753796.37750.resend.hermes@gmail.com> In-Reply-To: References: <1794143745.17311.hermes@gmail.com> <20261109111852.GQ176724@black.igk.intel.com> <1794223545.366398.reply.hermes@gmail.com> <20261109142041.GS176724@black.igk.intel.com> <1794235167.3657.reply.hermes@gmail.com> <20261109153955.GU176724@black.igk.intel.com> <6af1e999.9efe04cf.8f35d.ae23@mx.google.com> <20261109155007.GV176724@black.igk.intel.com> X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit (Resending to the list in plain text: my first copy was rejected for containing HTML. Sorry for the noise.) Hi Mario, On Sun, Nov 15, 2026 at 02:13:37PM +0000, Mario Limonciello wrote: > I'd lean on more likely a PD controller issue. Did you already look for > a BIOS update? Most vendors distribute PD updates with BIOS/EC. Thank you for looking at this. I'm on BIOS 1.06. Minisforum have a 1.07 image for the UM890 Pro with no release notes; its AGESA (PhoenixPI 1.2.0.0a) is the same as 1.06, and I couldn't tell from the image whether it carries a PD or EC update, so I haven't flashed it yet. > If there is no update available; can you start with reporting to your > vendor and let them reproduce and get some PD traces to confirm? I reported it to Minisforum on 8 November and it is with their firmware team now. I'll pass on your PD controller suggestion and ask whether 1.07 or a separate EC/PD update changes anything. Andrei, thank you for testing your SER8 and for laying the values out side by side. The host-side values are identical on both machines, including the retimer ID, PORT_CS_18 and the SB LINK_CONFIGURATION 03 d3 03, and your MacBook result rules out the cable and the DEG2. One difference from Framework #56: the StarTech TBLT5MM50CM240W I have been using is an active cable and it still trains TBT3, 2 x 10 Gb/s; the DEG2's bundled cable gives the same result. Like your SER8, the UM890 Pro exposes no UCSI device, so I can't see the PD side from Linux either. Thanks, James