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 4F13F26F296; Tue, 9 Dec 2025 05:53:48 +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=1765259629; cv=none; b=sqT2DT4LkoD32FjNS8EBYLDtRWAWjpTQtKADk+ekHUECEvCx3Fms1SHf8/TwR0pb7jBusv9beaAGNan3AUb3K80nh+R6QlF3q3wmFDqRlhxHz1qo8PDiCO1fV079c5XCH5ABd5GnLigUgJzJC5FZLh/UXkoZlZofofh5cZlsoDs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765259629; c=relaxed/simple; bh=z+m0utOd2YnpOXXxw6CT1KiBiBPO3m93BrS90rijNgU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Onv8LJm5yS+BfHecIJt6zmvWRtlxyugrnwTa5p8bD7BkcFmaOZ5FfX7FTdsvTC5K0w+I/xrdLSgUF64HzxX/MT6mvjMBmqkY+0lisTwPHp8lb0wnjITdv4T+jE6EbwJ21ndLbL8qwdji+UCEsPhw3xul32njQZth14is6uV1rAk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DDNVubnu; 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="DDNVubnu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F0A1AC4CEF5; Tue, 9 Dec 2025 05:53:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765259628; bh=z+m0utOd2YnpOXXxw6CT1KiBiBPO3m93BrS90rijNgU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=DDNVubnujiykhrzYXvr80WmV8f3bm3dgue6tBsXXGSQfXrdJX7pCOlhK75QSBif0G rgJwKBh+u9UnyxUeCZlbYXwR/InOAT8QqFeMELUPR+B62+vitLTuQKXTJ+NtkxY+Fd 8YYG/A9ThLkdnqkiQGQ5w753H19nljApdosTkEDmJevhspQk1YRw++vBCozlQnv3rW 0y5Xy7kTS9uyG2Yo2QPTDsFR5xmHfzAHyRiNm1W5u95fgguBOqX8SzzVn1im03HZy4 MTj8u/kK1gZUsavbL8qFyN7WpkXrB8+RxVwTbuGxftDueCMY2ZNvGTw9iQbaEZZzT/ u+AyZ2J9g8d8Q== Message-ID: <83142b0c-0743-4a23-8846-e9f5e72a7677@kernel.org> Date: Tue, 9 Dec 2025 06:53:45 +0100 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 v4 3/5] memory: tegra186-emc: Support non-bpmp icc scaling To: Aaron Kling Cc: Jon Hunter , Rob Herring , Conor Dooley , Thierry Reding , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org References: <20251027-tegra186-icc-p2-v4-0-e4e4f57e2103@gmail.com> <20251027-tegra186-icc-p2-v4-3-e4e4f57e2103@gmail.com> <82c8dda8-6fcb-48f9-bdaa-f3d1431e41ae@nvidia.com> <99ca4992-5736-417d-854e-379542549bee@kernel.org> <7f3dad08-cff5-40c2-8e7f-f6441a3d6b91@nvidia.com> <249bbe7e-e2da-4493-bdd5-8f4b17aff8fe@nvidia.com> <29cf2c16-3a0e-42c5-a083-16f77ae5d09a@nvidia.com> <63be3373-1ab4-4aa4-aa7a-0175727aa9a3@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 09/12/2025 05:26, Aaron Kling wrote: > On Sat, Nov 22, 2025 at 6:01 AM Krzysztof Kozlowski wrote: >> >> On 21/11/2025 12:21, Jon Hunter wrote: >>> >>> On 12/11/2025 07:21, Aaron Kling wrote: >>>> On Wed, Nov 12, 2025 at 12:18 AM Jon Hunter wrote: >>>>> >>>>> >>>>> On 11/11/2025 23:17, Aaron Kling wrote: >>>>> >>>>> ... >>>>> >>>>>> Alright, I think I've got the picture of what's going on now. The >>>>>> standard arm64 defconfig enables the t194 pcie driver as a module. And >>>>>> my simple busybox ramdisk that I use for mainline regression testing >>>>>> isn't loading any modules. If I set the pcie driver to built-in, I >>>>>> replicate the issue. And I don't see the issue on my normal use case, >>>>>> because I have the dt changes as well. >>>>>> >>>>>> So it appears that the pcie driver submits icc bandwidth. And without >>>>>> cpufreq submitting bandwidth as well, the emc driver gets a very low >>>>>> number and thus sets a very low emc freq. The question becomes... what >>>>>> to do about it? If the related dt changes were submitted to >>>>>> linux-next, everything should fall into place. And I'm not sure where >>>>>> this falls on the severity scale since it doesn't full out break boot >>>>>> or prevent operation. >>>>> >>>>> Where are the related DT changes? If we can get these into -next and >>>>> lined up to be merged for v6.19, then that is fine. However, we should >>>>> not merge this for v6.19 without the DT changes. >>>> >>>> The dt changes are here [0]. >>> >>> To confirm, applying the DT changes do not fix this for me. Thierry is >>> having a look at this to see if there is a way to fix this. >>> >>> BTW, I have also noticed that Thierry's memory frequency test [0] is >>> also failing on Tegra186. The test simply tries to set the frequency via >>> the sysfs and this is now failing. I am seeing .. > > With this patch dropped from -next, what needs to happen to get it > requeued? I gave an analysis over two weeks ago and have seen no > response since. Hm, I did not see the root cause identified, so maybe I missed something. Anyway, I am waiting for the patchset to be retested and resent. And testing MUST include kernel development process rules, including how patches are taken - see maintainer soc profile. Any dependencies must be clearly marked. Best regards, Krzysztof