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Fri, 25 Sep 2026 08:49:58 -0700 (PDT) X-Received: by 2002:a17:90b:4a86:b0:39e:6a82:afd3 with SMTP id 98e67ed59e1d1-3a098feb5c6mr5878751a91.37.1790351398188; Fri, 25 Sep 2026 08:49:58 -0700 (PDT) Received: from [192.168.1.8] ([122.177.242.141]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0b9357f64sm5541774a91.3.2026.09.25.08.49.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Sep 2026 08:49:57 -0700 (PDT) Message-ID: <0e80efa9-9377-474e-99f5-d458d81bfcde@oss.qualcomm.com> Date: Fri, 25 Sep 2026 21:19:49 +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 2/3] arm64: dts: qcom: glymur: Add videocc sleep clock To: Shawn Guo , Bjorn Andersson Cc: Abel Vesa , Stephen Boyd , Brian Masney , Jerome Brunet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , Taniya Das , Jagadeesh Kona , Bryan O'Donoghue , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260924161152.1162301-1-shengchao.guo@oss.qualcomm.com> <20260924161152.1162301-3-shengchao.guo@oss.qualcomm.com> Content-Language: en-US From: Jagadeesh Kona In-Reply-To: <20260924161152.1162301-3-shengchao.guo@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: oHFO9dXx76IBb1ttoxqms8mh3xRxlvVP X-Proofpoint-GUID: oHFO9dXx76IBb1ttoxqms8mh3xRxlvVP X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI1MDA2MyBTYWx0ZWRfX1AuRV2sGEf3q 23Kn10sxngMtYtFWPI3JSquyQ0usZ1g3ZzCWJKl0VyPVXfJCOIqlFs4punrFDL/ZAslUjK7gMN9 ruE9iLYONQBOiueZHglWfbhwy3Jtjuw= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI1MDA2MyBTYWx0ZWRfXwT7bfGpG3lTt uGrMMGvpsgZ0Y6LEIXh5RusTrnbk8K0Cv3tUueC8lrr3/nwzQ0YOntsg/DCmAj+EoPLS6w1C+yg E8llRYhnt+PuB4PKyoxF8a+HVwVSk5XbbfeT+TEArjI9lajnbuF4jIIwzwqYsuwZS75dTLI5vqF FTq6jDvrpq0T0jR4Es/ZmJfwH0ha7TIBTk8JQgfj+hjp7XpbOk7vAlHVOZe/AQoze9XxKar8pka b+js+XzHCG1WpYXtIkTvutQCKUCPfBjDAoER13bKHpPjiGs4sBfSIp4Kcsv2psjb3oDyKfpb5Tl Yhzt0ibDPCYIuQjwBBwbIwcCB9XFBdeAq2aSdyh7g5m9aKQZDB8DYSOGo0Bebkiimux4w50Xqvo MEzHA0HtTUak6PJRIJpvbtysihJWT6t4PCxxy1IZFDZdo6LO+11yLq+VW4vpo2ndclCPjc+dX71 MIndmOlRPLc6gZO23OA== X-Authority-Analysis: v=2.4 cv=eNmGH3p1 c=1 sm=1 tr=0 ts=6ab69828 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=c6pmHQ1/mDMFVLCaehS4aA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=cRXVm2DszLkgEr1CbDgA:9 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 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=2026-09-25_02,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 spamscore=0 bulkscore=0 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609250063 On 9/24/2026 9:41 PM, Shawn Guo wrote: > The videocc node supplies only the two XO inputs. videocc-glymur.c > expects a third input, DT_SLEEP_CLK, and uses it as the parent of > video_cc_sleep_clk_src, so that RCG cannot resolve its parent and ends > up as an orphan clock: any clk_set_rate() on it fails, and it shows up > parentless in /sys/kernel/debug/clk/clk_summary. > > Nothing is broken at runtime today because VIDEO_CC_SLEEP_CLK (0x8138) > is listed in video_cc_glymur_critical_cbcrs and is therefore force > enabled through regmap, bypassing the clock framework; the sleep source > simply keeps whatever rate the bootloader left. The orphan still blocks > any future rate management of the video sleep path. > Hi Shawn, The sleep clock supports only a fixed 32KHz frequency and does not support any other frequencies. Additionally, this clock is not currently used or voted on by any consumers. Therefore, leaving it in its default bootloader configured rate should be sufficient, and this change isn't really required. Thanks, Jagadeesh