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[5.90.7.64]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4889b5427cfsm30886435e9.1.2026.04.03.06.29.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2026 06:29:50 -0700 (PDT) Date: Fri, 3 Apr 2026 15:29:47 +0200 From: Stefano Radaelli To: Paul Menzel Cc: linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, pierluigi.p@variscite.com, Stefano Radaelli , Marcel Holtmann , Luiz Augusto von Dentz Subject: Re: [PATCH v2 1/1] Bluetooth: hci_ll: Enable BROKEN_ENHANCED_SETUP_SYNC_CONN for WL183x Message-ID: References: <36a2c4c75e557527d101897b649f9de8d2180fb6.1771930508.git.stefano.r@variscite.com> <6398d0a2-f9ef-42a9-8761-6c924a5fb341@molgen.mpg.de> Precedence: bulk X-Mailing-List: linux-bluetooth@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: <6398d0a2-f9ef-42a9-8761-6c924a5fb341@molgen.mpg.de> Hi Paul, On Thu, Apr 02, 2026 at 10:51:01PM +0200, Paul Menzel wrote: > > Do you have a reproducer? > Yes, the issue can be reproduced on our Variscite platforms using TI WL183x modules (e.g. VAR-SOM-MX6). When establishing an SCO connection using the HCI Enhanced Setup Synchronous Connection command. Forcing the legacy HCI Setup Synchronous Connection (0x0028) instead restores correct SCO operation. > Have you contacted TI about this? > No, we have not contacted TI. WL183x devices are quite old (released more than 10 years ago), and the latest available firmware is also quite dated and predates the introduction of the Enhanced Setup Synchronous Connection handling in the Linux kernel. Given this, these devices cannot realistically work correctly with this command unless a new firmware update is provided by TI, which seems unlikely at this point. > > Do you have an example device, that uses one of these? Yes, for example the VAR-SOM-MX6, which integrates WL183x modules. The issue has been consistently observed across our platforms using WL1831, WL1835 and WL1837 modules. >Also, do you know of > TI device, where the HCI Enhanced Setup Synchronous Connection command > works? > At the moment I do not have access to other TI Bluetooth families using this driver to verify whether the enhanced command works correctly on newer devices. For this reason, the patch limits the quirk only to the WL183x family, based on the compatible string, and does not affect other TI devices handled by hci_ll. Additional compatibles can be added in the future if similar behaviour is observed on other controllers. Thanks for your review! Best Regards, Stefano