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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-clk@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-Spam-Info: AW1haW4tMjYwOTI1MDA2MyBTYWx0ZWRfX/eyaXgSW/U6h ufnjuRP9hJ6j1fHwivOIhJ5cbPE6xHwFP5/lo5YwMxIa/NGj36LlgknWd8Ress+tlyEHAC+w9te nA9KGS0mJHSBQEwQuIppYoOA4Ysah+U= X-Proofpoint-GUID: qSvSIVTDqLq3Grt8bQ22YcxUmFZ7BclU X-Proofpoint-ORIG-GUID: qSvSIVTDqLq3Grt8bQ22YcxUmFZ7BclU X-Authority-Analysis: v=2.4 cv=LNPz05W9 c=1 sm=1 tr=0 ts=6ab69827 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=c6pmHQ1/mDMFVLCaehS4aA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=cRXVm2DszLkgEr1CbDgA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI1MDA2MyBTYWx0ZWRfX0Ea96453ZvSa lKyWSsSiGU8+GmlJo9qIAMCXThIaRERA8OW5dZEMiCBuQh87iu7Bavy3ErRwcsikvICjmdBEFFR YK5cmWIl4hUnOR0lk4ye/gon5DQvTwbX0tAITwhnnn81/wjZRR5ZMpg+3b70qnTz/+DoYdmUlYQ 6ZQqoxcSHQ/Mg9qu8JN+4vfF8Viffen0GHut2ea86GKcjQwmBm8D0q5e7nXxp3dRdzd1dHp5Ygl 8da3IV4LZ7SlOilh1zOrJwmrWADHS8p25iiEe/eY2w8PMn96x+eTsKzxx7PjmeUoUSMOCyBHjgE Xpb+aTXXroUtLWGJ1tE4KIG0b5X/c6HRLkcZAYVfxb2x9ez9IXduskoM0Q328GPoIsJH0G5sQEa MoM2s/FD95f+xCk8h50FS9jmgaKuCUFTPo9cTb2MuhahEojyy4WnOk/Ass6GjYbqZBC1RZ4wJ9/ bmkgue6+4aqMWPLLSng== 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 phishscore=0 spamscore=0 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 priorityscore=1501 clxscore=1015 bulkscore=0 lowpriorityscore=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