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Wed, 01 Apr 2026 22:34:02 -0700 (PDT) X-Received: by 2002:a17:90b:1344:b0:35d:9d4f:f595 with SMTP id 98e67ed59e1d1-35dc6f5fde7mr6087050a91.17.1775108041987; Wed, 01 Apr 2026 22:34:01 -0700 (PDT) Received: from [10.217.216.245] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35dbe62f5dbsm6744589a91.8.2026.04.01.22.33.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 01 Apr 2026 22:34:01 -0700 (PDT) Message-ID: <7866c1b6-7bd0-4202-93d1-955d60218b43@oss.qualcomm.com> Date: Thu, 2 Apr 2026 11:03:54 +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 v8 08/18] arm64: dts: qcom: x1e80100: Add CAMCC block definition To: Konrad Dybcio , Bryan O'Donoghue , Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robert Foss , Todor Tomov , Mauro Carvalho Chehab , Konrad Dybcio , Vladimir Zapolskiy , Bryan O'Donoghue Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Krzysztof Kozlowski References: <20260225-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v8-0-95517393bcb2@linaro.org> <20260225-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v8-8-95517393bcb2@linaro.org> <4fab8e64-8251-4424-974c-19434ee04c76@oss.qualcomm.com> <9ff1645f-b2c9-4c1a-ae2d-96af416b08d9@oss.qualcomm.com> <382725b5-1e72-44b2-b9ae-38aea1f7a976@oss.qualcomm.com> Content-Language: en-US From: Taniya Das In-Reply-To: <382725b5-1e72-44b2-b9ae-38aea1f7a976@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAyMDA0NiBTYWx0ZWRfX0CYWRPNb0raa irTGeU0jGFZ5OcHQcYNsqlVxnd22JcG1QqQ7nOOCLiOwuDl2+VkMkEtYfAmy6ajI9N5ht9CYb81 e7RtYsxsdL6r5SMWGFhSIzJQEn6/G7qkvIkraEPWsRcKtSHO6wGzBvVdGdD44mtbrDN5BcLBMV4 N8mB4It+kefm1Qphi5hCKwteOdL3/tRalbgeeDVQidQhfCVAV657xYNU2f73ZA3wLrsKrflYm25 sDzx07CN6OWQDrQuBWFKi8oUntPTHsnXBHY3xi0CMUUAtYstmxu9pUezwomgjjY+fbB95QUhWaN YJGvOysgMnw1QE9ivxzA9zAqwLVhf0LG8mCra68RkBkVH9D4GBulh20+/L+C+8/gNzDxOVXf8Vs 758PkHRo0iAsYieEEUompPL9++4gnSNdg0iDPHxMJiSiyS/QHgVSeXvH9zna3BEZNYjAo97XyVR QuZ8WMzOfrzo1CQ6hAA== X-Proofpoint-GUID: iOXoMev5XnxIs8BuDbOLbZzkSze2fpuH X-Proofpoint-ORIG-GUID: iOXoMev5XnxIs8BuDbOLbZzkSze2fpuH X-Authority-Analysis: v=2.4 cv=F8pat6hN c=1 sm=1 tr=0 ts=69cdffcb cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=E-vbLytUzHry21UsOq8A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-02_01,2026-04-01_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 adultscore=0 clxscore=1015 suspectscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604020046 On 3/3/2026 3:35 PM, Konrad Dybcio wrote: >> Konrad, MxA is always ON, and with the current clock configuration, a >> performance vote isn’t required because the clock controller currently >> votes only for the minimum level. > Yes, it's on, however I'm asking whether it needs to be at any specific > higher OPP as the clocks are scaled to higher rates. > > In particular, PLL2 and the MCLK RCGs/branches have *some* references > to MXA, yet their FMAX is possible @ LOWSVS_D1, so it may be that we > *effectively* don't need any. Sorry for the late response, Konrad. The PLL2 operates at a fixed frequency. The maximum frequency derived from the MCLK RCGs/branches is 68.57 MHz, which can be achieved at LOWSVS_D1. Therefore, MxA at LOWSVS_D1 should be sufficient for the MCLKs to operate, and no explicit voting is required. -- Thanks, Taniya Das