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([2401:4900:889d:390b:491d:8cf9:7389:5b70]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-169a567aef5sm39437810c88.19.2026.10.13.11.28.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 13 Oct 2026 11:28:57 -0700 (PDT) Message-ID: <4acb0eee-f7ae-4817-9848-d72cf486bc06@oss.qualcomm.com> Date: Tue, 13 Oct 2026 23:58:44 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] i2c: qcom-geni: restore tSCL with 32MHz I2C fast-mode To: Thorsten Leemhuis , Daniel J Blueman , Andi Shyti , Viken Dadhaniya Cc: Sasha Levin , Manikanta Mylavarapu , Bjorn Andersson , linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Birk Skyum , Linux kernel regressions list References: <20260929041444.9837-1-daniel@quora.org> <1ca16602-fb66-4706-8e86-3b35372324b9@oss.qualcomm.com> <20261009145800.rc-reply-0004@kernel.org> Content-Language: en-US From: Mukesh Savaliya In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=RPQmjIi+ c=1 sm=1 tr=0 ts=6ace786b cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=VwQbUJbxAAAA:8 a=-sI2l8CUKJjV0ebggCoA:9 a=QEXdDO2ut3YA:10 a=scEy_gLbYbu1JhEsrz4S:22 X-Proofpoint-GUID: fm8W0PipXXOZLdtvv-Wz_jsK5MZU45dJ X-Proofpoint-ORIG-GUID: fm8W0PipXXOZLdtvv-Wz_jsK5MZU45dJ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDEzMDA3MyBTYWx0ZWRfX0Xd33cn845Ps nYLug9s9xze/AJ7CQgOTn+Lu+p5X0RYbdc/gc1uVPrVfB/44J8v1aDi5rvKk/E+/92LQASNOkK7 AJdHvgFOONBMRcK00k+wQkoKkezbug4jDdwjsg26ewVp1Z8A6lQoj3xQeJFB7deeKU1K1JGXP9j Khaz73yzCZief3suJAb/gWSrBC37jEOO4JiX7KxO/G9J3AqLv5szo4aSljAW2g8vTZ6ua2LFW/I qyG7qMo1vYOs90gNcplUoliZj5LydppfpDlSINgnRpVJDPPQ49Y6WYYknoV2HSorMJhziVp/MVU 2FfPT2vZaciR/eK1hiKROzPLDJ3iuVbPyx2Fc0Dy7oDqmQGVvpqd9DBq4fybgRC6OnKsYJE2i78 8O96shOVIa9AYVtz1GiZwTTMgIIlVsYr7tJXlw4oMhXpNnkfSIJDwYShoGU5bgFUzMNDB34pb61 v8yeMNxG0lJkDiOQStw== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDEzMDA3MyBTYWx0ZWRfX5EQpCaL2kJTq QoHVSqZ91Tki/vBCrFNjNagdKnO61I9G4ZKrSZhYt0vGOzzBnSKlywdyW+zPPLfdGeSnz5WOCya C5xaOEH1CC+K/nCKld1zAkuEp6KwTiU= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-13_01,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610130073 Hi Thorsten, Thanks ! On 10/13/2026 1:04 PM, Thorsten Leemhuis wrote: > On 10/9/26 21:01, Sasha Levin wrote: >>> On 9/30/2026 3:01 PM, Daniel J Blueman wrote: >>>> I would revert the original patch if there is hardware that uses the >>>> I2C 1MHz fast-mode, since the current timings aren't to spec, but also >>>> weren't before. >> >> For stable: cb97bf3d4f91 ("i2c: qcom-geni: Fix hardcoded clock index in >> SE_GENI_CLK_SEL") has already shipped in 7.2.9, 6.18.55 and 6.12.112, and is >> queued for 6.6, 6.1, 5.15 and 5.10. >> >> The 32 MHz clock map (506bb2ab0075, v6.13+) does not exist in 6.12.y and older. >> The backports there pick only the 19.2 MHz entry, so the Yoga Slim 7x / >> X1E80100 timing regression cannot occur on 6.12.y or older, and I'm keeping the >> 6.6 and older queues as they are. >> >> 7.2.y and 6.18.y do have the 32 MHz table and are affected. Once the fix lands >> in mainline, I'll pick it up for 7.2 and 6.18. > > @Andi, @viken, and/or @Daniel: > > Is the patch at the start of the thread or some improved version heading > to mainline meanwhile? What Sasha wrote above is one reason why that > would be good rather sooner than latter; another is a regression > report[1] from Birk (now CCed) wo ran into the problem with mainline -- > so it would be good to fix this before 7.3 is released, too. > > Or is a revert the better option to achieve that? > This is in active discussion with hardware experts, but taking time to get specs compliant configuration values while it's being tested. I see 7.3 release on 25th, so what max time we can have before reverting ? I am trying to get values asap. > Ciao, Thorsten > > [1] > https://lore.kernel.org/stable/179173732257.29426.7905170638383807320@pm.me/