From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 374F21EDA0B; Mon, 20 Oct 2025 18:18:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760984332; cv=none; b=Di0GtsdwFCz71ytmgadLIdEd/h4F8WDPrTHIxhj5GEvcYDHs6oekEoKDTJ7P2y4JZGL9h66gWsz6ouKoaabM9N55b97Mx+jpBCypXmeIS7OQcm56iM1OjGl2CRzD/eiFPiUPqZt3/p3184RddSyh7BtzvGMPbP6VBAPfzK2upyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760984332; c=relaxed/simple; bh=l7Jix1FBerg64A7Lg5AG+fwNbq6vaC7vvRzcp2jzx/A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VCZjuOMxOhlGOm1pfUhUx6zhcNx+GPEfyTKKJiUVnZd5C76qqqivk+oP3IxenZ4XUs84pFSwm4PQHIClsF7yIrBItROrE622Dilh6S1EolvHeswP13JDdTH6zfY/yq3yhMpc2yIMsHWnfgi1+HenKwOLQz72CCAhF4TOhK2Vpyc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iwxVORL7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iwxVORL7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7822BC113D0; Mon, 20 Oct 2025 18:18:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760984330; bh=l7Jix1FBerg64A7Lg5AG+fwNbq6vaC7vvRzcp2jzx/A=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=iwxVORL7CJrF3NyWiqB1l68YNoiTfKSOhQVKZDvsKI131gQkui/hBBrh/+F8Ay44J FKrm14wL5SC+C3U3xY7JWjZ8gy3BRWwBRRDvKREq1H1hi8YDgOHX+t+pzao2hEtcke 0HNYKIRSg6ERXKtBwf+eM1ZHRF6nombrIuoRaYWczk5LHVbrievniUoMJjbZ5hdSX8 PBBl2OdKq/rbSRWiFNw/3eybQNCGoX5kGud35zkwkgG3FQb5H+x092VYQQDEp/93Hl cvkhAtcmQbvF8QOyJa0rIoflvbBbNfKDoFyWkjLjD7ou+I1y257AKtin8iyl8+Clek qp0fqZRp5ruDQ== Message-ID: Date: Mon, 20 Oct 2025 19:18:44 +0100 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/6] media: qcom: camss: Add Kaanapali compatible camss driver To: Vijay Kumar Tumati , Hangxiang Ma , Loic Poulain , Robert Foss , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Todor Tomov , Vladimir Zapolskiy , Mauro Carvalho Chehab Cc: linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, aiqun.yu@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, trilok.soni@oss.qualcomm.com, yijie.yang@oss.qualcomm.com, Jingyi Wang , Atiya Kailany References: <20251014-add-support-for-camss-on-kaanapali-v2-0-f5745ba2dff9@oss.qualcomm.com> <20251014-add-support-for-camss-on-kaanapali-v2-3-f5745ba2dff9@oss.qualcomm.com> <0fe25ca8-8dd4-42c7-a818-a803a256f42f@linaro.org> <8ba56bfe-d0cc-4f9a-93c8-0c361d5c59c8@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 20/10/2025 14:38, Vijay Kumar Tumati wrote: >> >> Ack. Thanks. > Just adding my thoughts on this, as you know the peak/avg bandwidth > should primarily depends on the sensor data rate and additionally, the > average BW vote should depend on the buffer sizes in the NIUs/NOCs and > (although irrelevant here) whether it's an RT or NRT module (file system > reads/writes from the NRT modules can be averaged and controlled > better). Fundamentally, the votes from all modules go into the > calculation of the DDR clock. The current driver does not take into > account anything. So either way, it is not ideal I think. We can discuss > and come up with a cleaner approach in a different patch series covering > all chip sets. Thanks. Yeah we can. But please put something more sensible in for v3. --- bod