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 45ECB2BEFE8; Thu, 4 Sep 2025 08:19:34 +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=1756973974; cv=none; b=SKtBDwSw0vOEq3rjZGa0DZMDWbFToRTs3OAQa+yaqecvpC/OIE7z/h3c/j5FkxYC2eLEDKjxqrQamukT0219KRDA8uuUCGVWj/V7siC+p2AqeFpYN/chaRGcuA+CU8S6SMNd9POHuHdKWBReXjtSmh73EXYTCbRiBl6nJR/Dw/U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756973974; c=relaxed/simple; bh=kxMA6xJIchs9QR1tfO7hgVmWfcdv0CoNQonnp5feJiU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=cDGUBSocC5l8WAzr/4qUa/qCLzNzGmSH7Oxle9/6qN+nsjcu8M7ua0t08jM6DY2t4VGRFIlzlLAYcTq6191zMppIcPSjJNXD9CXSuOYX7oNZaN9tKLgltyFP4ZpM6TkNn/FabkxPRtRbj1RkPk1An/bN/TVkqL0UITf5qKWbBXQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pmFoytlr; 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="pmFoytlr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08B01C4CEF0; Thu, 4 Sep 2025 08:19:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756973974; bh=kxMA6xJIchs9QR1tfO7hgVmWfcdv0CoNQonnp5feJiU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=pmFoytlrB60TuzrpAsR5wdSCNjdICXeOP+kFtNbfcpuUsFZNrj/dlrtSbLiRxNHCt WvJ1kfQmjsmELWl3mCa7Ptd7+4zagRgZkj6rY+8veiUupCeHu6kFQREvU8nXOsYG1m vaJhW91XH9hO5tuQaPpaIraXRCFEZUwpwMuVCWzTmQvnzSvJQ8frE8KOiQ04mvx279 Ml4X1THzPtoEv1qmJsyeYJVpphzSOhndH7OQdDTxF4vcCN9BaNikA1IAJ6oJBvoNtV FoqlfUTF0kfHaWGjcCGrObVyf6SSzTgq5+BEPZxMXZgKP15fM/Zv3wf56Ueppn4QMt tJ6g215RFgbEw== Message-ID: <08062eb7-1b7d-4fc3-86ea-af70069065eb@kernel.org> Date: Thu, 4 Sep 2025 10:19:29 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/8] Support dynamic EMC frequency scaling on Tegra186/Tegra194 To: Aaron Kling Cc: Rob Herring , Conor Dooley , Thierry Reding , Jonathan Hunter , "Rafael J. Wysocki" , Viresh Kumar , Krzysztof Kozlowski , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org References: <20250831-tegra186-icc-v1-0-607ddc53b507@gmail.com> <20250902-glittering-toucan-of-feminism-95fd9f@kuoka> <47c7adc9-fa91-4d4e-9be4-912623c627d6@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGVBBMBCgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJoF1BKBQkWlnSaAAoJEBuTQ307 QWKbHukP/3t4tRp/bvDnxJfmNdNVn0gv9ep3L39IntPalBFwRKytqeQkzAju0whYWg+R/rwp +r2I1Fzwt7+PTjsnMFlh1AZxGDmP5MFkzVsMnfX1lGiXhYSOMP97XL6R1QSXxaWOpGNCDaUl ajorB0lJDcC0q3xAdwzRConxYVhlgmTrRiD8oLlSCD5baEAt5Zw17UTNDnDGmZQKR0fqLpWy 786Lm5OScb7DjEgcA2PRm17st4UQ1kF0rQHokVaotxRM74PPDB8bCsunlghJl1DRK9s1aSuN hL1Pv9VD8b4dFNvCo7b4hfAANPU67W40AaaGZ3UAfmw+1MYyo4QuAZGKzaP2ukbdCD/DYnqi tJy88XqWtyb4UQWKNoQqGKzlYXdKsldYqrLHGoMvj1UN9XcRtXHST/IaLn72o7j7/h/Ac5EL 8lSUVIG4TYn59NyxxAXa07Wi6zjVL1U11fTnFmE29ALYQEXKBI3KUO1A3p4sQWzU7uRmbuxn naUmm8RbpMcOfa9JjlXCLmQ5IP7Rr5tYZUCkZz08LIfF8UMXwH7OOEX87Y++EkAB+pzKZNNd hwoXulTAgjSy+OiaLtuCys9VdXLZ3Zy314azaCU3BoWgaMV0eAW/+gprWMXQM1lrlzvwlD/k whyy9wGf0AEPpLssLVt9VVxNjo6BIkt6d1pMg6mHsUEVzsFNBFVDXDQBEADNkrQYSREUL4D3 Gws46JEoZ9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLue MNsWLJBvBaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6ei OMheesVS5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wA GldWsRxbf3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA 6z6lBZn0WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9 YegxWKvXXHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt 91pFzBSOIpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gU BLHFTg2hYnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/ JoFzZ4B0p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu 4vXVFBYIGmpyNPYzRm0QPwARAQABwsF8BBgBCgAmAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtB YpsFAmgXUF8FCRaWWyoACgkQG5NDfTtBYptO0w//dlXJs5/42hAXKsk+PDg3wyEFb4NpyA1v qmx7SfAzk9Hf6lWwU1O6AbqNMbh6PjEwadKUk1m04S7EjdQLsj/MBSgoQtCT3MDmWUUtHZd5 RYIPnPq3WVB47GtuO6/u375tsxhtf7vt95QSYJwCB+ZUgo4T+FV4hquZ4AsRkbgavtIzQisg Dgv76tnEv3YHV8Jn9mi/Bu0FURF+5kpdMfgo1sq6RXNQ//TVf8yFgRtTUdXxW/qHjlYURrm2 H4kutobVEIxiyu6m05q3e9eZB/TaMMNVORx+1kM3j7f0rwtEYUFzY1ygQfpcMDPl7pRYoJjB dSsm0ZuzDaCwaxg2t8hqQJBzJCezTOIkjHUsWAK+tEbU4Z4SnNpCyM3fBqsgYdJxjyC/tWVT AQ18NRLtPw7tK1rdcwCl0GFQHwSwk5pDpz1NH40e6lU+NcXSeiqkDDRkHlftKPV/dV+lQXiu jWt87ecuHlpL3uuQ0ZZNWqHgZoQLXoqC2ZV5KrtKWb/jyiFX/sxSrodALf0zf+tfHv0FZWT2 zHjUqd0t4njD/UOsuIMOQn4Ig0SdivYPfZukb5cdasKJukG1NOpbW7yRNivaCnfZz6dTawXw XRIV/KDsHQiyVxKvN73bThKhONkcX2LWuD928tAR6XMM2G5ovxLe09vuOzzfTWQDsm++9UKF a/A= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 03/09/2025 08:37, Aaron Kling wrote: > On Wed, Sep 3, 2025 at 1:20 AM Krzysztof Kozlowski wrote: >> >> On 02/09/2025 18:51, Aaron Kling wrote: >>> On Tue, Sep 2, 2025 at 3:23 AM Krzysztof Kozlowski wrote: >>>> >>>> On Sun, Aug 31, 2025 at 10:33:48PM -0500, Aaron Kling wrote: >>>>> This series borrows the concept used on Tegra234 to scale EMC based on >>>>> CPU frequency and applies it to Tegra186 and Tegra194. Except that the >>>>> bpmp on those archs does not support bandwidth manager, so the scaling >>>>> iteself is handled similar to how Tegra124 currently works. >>>>> >>>> >>>> Three different subsystems and no single explanation of dependencies and >>>> how this can be merged. >>> >>> The only cross-subsystem hard dependency is that patches 5 and 6 need >>> patches 1 and 2 respectively. Patch 5 logically needs patch 3 to >>> operate as expected, but there should not be compile compile or probe >>> failures if those are out of order. How would you expect this to be >>> presented in a cover letter? >> >> Also, placing cpufreq patch between two memory controller patches means >> you really make it more difficult to apply it for the maintainers. >> Really, think thoroughly how this patchset is supposed to be read. > > This is making me more confused. My understanding was that a series > like this that has binding, driver, and dt changes would flow like > that: all bindings first, all driver changes in the middle, and all dt You mix completely independent subsystems, that's the main problem. Don't send v3 before you understand it or we finish the discussion here. > changes last. Are you suggesting that this should be: cpufreq driver > -> bindings -> memory drivers -> dt? Are the bindings supposed to be > pulled with the driver changes? I had understood those to be managed > separately. What does the submitting patches doc in DT say? Best regards, Krzysztof