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 ED08B23F36D; Wed, 12 Mar 2025 11:34:51 +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=1741779292; cv=none; b=ilUi2+KAQAVjkLWxZkFSeec8sXJmgcO9eiKYeFTQg8AEIIl8eqC2IR7FxozpzbjfjgseRRR1ysHTkrYWEa+0Jr9JO9M828PJA9dep+6qVISCgsScngyF0tfvH4G8zk5pC93xCOToKRdm7mw5P5yzvEa4gmiq2YdrmCZ2S4leFC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741779292; c=relaxed/simple; bh=XKZ84eMAWu1q6TS26A2iznKDdiE3rEMzgusYYtMYnIc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=FGQ3XH6b2PI22Rk2be+qIJ32Wufm9zstEEJhcPsA3trGJBb+O17zMrgHfrwkV9JVDjcR7q1Fvtaq8KL4whpMiIQuL5PVVJMzyV9AkTtxM+REj38JIfAUUO9vPUwItSWAxKO6CKlr7gInW/uB7Xa/Q310a12+8hldxqKXaekfYWI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UY2pjaft; 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="UY2pjaft" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CEC6FC4CEEC; Wed, 12 Mar 2025 11:34:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741779291; bh=XKZ84eMAWu1q6TS26A2iznKDdiE3rEMzgusYYtMYnIc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=UY2pjaftQciujxcwek5uk5gM7/L4/SIwS8rWsrcV/qvGlLuhwvaQWfQcBcdqgc89B 8hvg1wOpbc5xkncQzM2Lnc7tnBcSWyKuR1T3Wx6jf/HTBntrAJGJLNnsA0r7qFhJrF vSCdNn9Q2WpCTufhXY9L3x4PQGS0msMjvDG9X8vDE/ppv68MMz6tPYqbJ+HK1wOXUn egSEiciDBAT7/Hd8VKrSZyhSiLZksJSOdw3h3OxNEYmIlsEErFLonDUNsX0mcMluAW rzLkAmdzYK0YNWrvH0XETITsSndcxyF02t7imMxLun+8BbNY7hsD6Apb/UeXtJSmb0 nyBcJbHcchTPQ== Message-ID: <5ecb69c9-c877-4c91-a1ae-0ef59d0ee3d6@kernel.org> Date: Wed, 12 Mar 2025 12:34:44 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: defconfig: Enable Qualcomm interconnects as built-in To: Christopher Obbard Cc: Dmitry Baryshkov , Catalin Marinas , Will Deacon , Bjorn Andersson , Konrad Dybcio , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20250311-wip-obbardc-qcom-defconfig-interconnects-builtin-v1-1-675b6bc57176@linaro.org> <92dd35a2-d1cc-4f2b-b3a8-5752ec33b0d3@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 FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJgPO8PBQkUX63hAAoJEBuTQ307 QWKbBn8P+QFxwl7pDsAKR1InemMAmuykCHl+XgC0LDqrsWhAH5TYeTVXGSyDsuZjHvj+FRP+ gZaEIYSw2Yf0e91U9HXo3RYhEwSmxUQ4Fjhc9qAwGKVPQf6YuQ5yy6pzI8brcKmHHOGrB3tP /MODPt81M1zpograAC2WTDzkICfHKj8LpXp45PylD99J9q0Y+gb04CG5/wXs+1hJy/dz0tYy iua4nCuSRbxnSHKBS5vvjosWWjWQXsRKd+zzXp6kfRHHpzJkhRwF6ArXi4XnQ+REnoTfM5Fk VmVmSQ3yFKKePEzoIriT1b2sXO0g5QXOAvFqB65LZjXG9jGJoVG6ZJrUV1MVK8vamKoVbUEe 0NlLl/tX96HLowHHoKhxEsbFzGzKiFLh7hyboTpy2whdonkDxpnv/H8wE9M3VW/fPgnL2nPe xaBLqyHxy9hA9JrZvxg3IQ61x7rtBWBUQPmEaK0azW+l3ysiNpBhISkZrsW3ZUdknWu87nh6 eTB7mR7xBcVxnomxWwJI4B0wuMwCPdgbV6YDUKCuSgRMUEiVry10xd9KLypR9Vfyn1AhROrq AubRPVeJBf9zR5UW1trJNfwVt3XmbHX50HCcHdEdCKiT9O+FiEcahIaWh9lihvO0ci0TtVGZ MCEtaCE80Q3Ma9RdHYB3uVF930jwquplFLNF+IBCn5JRzsFNBFVDXDQBEADNkrQYSREUL4D3 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 YpsFAmA872oFCRRflLYACgkQG5NDfTtBYpvScw/9GrqBrVLuJoJ52qBBKUBDo4E+5fU1bjt0 Gv0nh/hNJuecuRY6aemU6HOPNc2t8QHMSvwbSF+Vp9ZkOvrM36yUOufctoqON+wXrliEY0J4 ksR89ZILRRAold9Mh0YDqEJc1HmuxYLJ7lnbLYH1oui8bLbMBM8S2Uo9RKqV2GROLi44enVt vdrDvo+CxKj2K+d4cleCNiz5qbTxPUW/cgkwG0lJc4I4sso7l4XMDKn95c7JtNsuzqKvhEVS oic5by3fbUnuI0cemeizF4QdtX2uQxrP7RwHFBd+YUia7zCcz0//rv6FZmAxWZGy5arNl6Vm lQqNo7/Poh8WWfRS+xegBxc6hBXahpyUKphAKYkah+m+I0QToCfnGKnPqyYIMDEHCS/RfqA5 t8F+O56+oyLBAeWX7XcmyM6TGeVfb+OZVMJnZzK0s2VYAuI0Rl87FBFYgULdgqKV7R7WHzwD uZwJCLykjad45hsWcOGk3OcaAGQS6NDlfhM6O9aYNwGL6tGt/6BkRikNOs7VDEa4/HlbaSJo 7FgndGw1kWmkeL6oQh7wBvYll2buKod4qYntmNKEicoHGU+x91Gcan8mCoqhJkbqrL7+nXG2 5Q/GS5M9RFWS+nYyJh+c3OcfKqVcZQNANItt7+ULzdNJuhvTRRdC3g9hmCEuNSr+CLMdnRBY fv0= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/03/2025 12:10, Christopher Obbard wrote: > Hi Krzysztof, > > On Wed, 12 Mar 2025 at 09:56, Krzysztof Kozlowski wrote: >> >> On 11/03/2025 20:15, Christopher Obbard wrote: >>> Hi Dmitry, >>> >>> On Tue, 11 Mar 2025 at 19:58, Dmitry Baryshkov wrote: >>>> >>>> On Tue, Mar 11, 2025 at 07:10:06PM +0100, Christopher Obbard wrote: >>>>> I sent this patch to start the discussion, some things I found: >>>>> >>>>> 1) Some interconnects are missing from arm defconfig. Should they be =y too ? >>>> >>>> No, unless those are required for the UART console. >>> >>> OK, that makes sense. FWIW the cryptic (to me, at least) commit log on >>> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eee808134ecf1c1093ff1ddfc056dc5e469d0c3 >>> made me think that the interconnects should be built-in on all devices. >>> >>> Of course, the real problem here is RB3gen2 not actually finding the >>> UFS/eMMC device due to no interconnect driver. >>> Until now, I have been building that into the kernel. I will >>> investigate instead shoving into the initrd (in both debian and >>> fedora) which should solve my issue and render this patchset useless. >> >> For Qualcomm platforms you are expected to always have initramfs, thus >> you will have the modules for UFS/eMMC mounts. I don't understand the >> problem which you were trying to solve. >> >> The interconnects were built in *only* because of need for serial >> console. Only. > > Thanks for confirming. It is all clear now. > > Consider this patch dropped from my side. > > For reference, I am working on updating initramfs generation tools in > Debian/Fedora to include the required interconnect modules. Currently > the interconnect drivers are built as modules in these distros, but > are not included in the initrd. That is where my confusion initially > stemmed from. Sure. This defconfig is anyway for us - developers, not for the distros to use directly. Distros have much bigger configs and use almost everything as module. Best regards, Krzysztof