From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 90DBEC43458 for ; Wed, 8 Jul 2026 15:18:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NeJgD5RqeYSgUCKAd7pwkGxapxLIfd4GsKatP9ijw/Q=; b=m2HL5WEnDHWJ8JKjoTX06VOwCb SH8RVzQDrEVc7qixH1FInQew8zv/GnwJiEWIh+wRq/23nzTHNtIY8KBUCCgQv785M2AXzjn0CrW6D wY/2RYKoMrmRp0GWulxXqXHMes2gZqdfEnpxxtbhl1PCOJFrCC8vOwn422kJOD2+TYfOcKQ/WjcqS GcofgQkJW+45DWByVp6wzRfSHKhwz8nnGUumaKx7J5mER/tWoSKNHKOCkpqFDGcb5wq/OZmlAMkjN yQLXusUdVApw/Ze5jLrhTPQCgZsc/SI3xzeOCuH4ywJVHlKz6oPwPoyXMYvJ5YFZl+Yb+jEy3O+Yu 6VI76hwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whU2U-0000000HS7x-2oxa; Wed, 08 Jul 2026 15:18:18 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whU2T-0000000HS7U-26XC for linux-arm-kernel@lists.infradead.org; Wed, 08 Jul 2026 15:18:17 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 8258160008; Wed, 8 Jul 2026 15:18:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 276FB1F000E9; Wed, 8 Jul 2026 15:18:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783523896; bh=NeJgD5RqeYSgUCKAd7pwkGxapxLIfd4GsKatP9ijw/Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=OuWS6g2RA5H6l2xX1Q+gKsHNxQTM4CZM4PoD8otYQrcx4Q5MCIvq965nn35X7Gqsx 7FjnAWSIlEo97mgYC7B4Wp9x5Q92hwXxodYTsFBYCSf75MOGA6nzsOUtzGOom71jP0 Pc92yl33S5mF/k1dfXOtkyxkx16NwI5rArIHy6Qs/Dd46FUqhdVZc3b7GFP+XYD2NR 83QD64q1k2koBpNUK2Wkf4mfX9xER5kD45ukfujjWWApvvAWi0aBUne+1wov6iChCT oSfSX0DVj7gMYf9Owf+WbvNEtvcVxw7e04enxB4t1DJJMHUvSB0uEf3UNH8M0+bGP1 T/1kUnecBZskQ== Date: Wed, 8 Jul 2026 10:18:13 -0500 From: Bjorn Andersson To: Bibek Kumar Patro Cc: Dmitry Baryshkov , Will Deacon , Robin Murphy , Joerg Roedel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , Rob Clark , linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Krzysztof Kozlowski Subject: Re: [PATCH v3 1/6] dt-bindings: iommu: arm,smmu: Document interconnects property Message-ID: References: <20260706-smmu_interconnect_addition-v3-0-afdca0125a65@oss.qualcomm.com> <20260706-smmu_interconnect_addition-v3-1-afdca0125a65@oss.qualcomm.com> <4e266d45-ee88-42f8-91da-6253927686ae@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4e266d45-ee88-42f8-91da-6253927686ae@oss.qualcomm.com> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jul 08, 2026 at 08:22:00PM +0530, Bibek Kumar Patro wrote: > > > On 7/7/2026 10:12 PM, Dmitry Baryshkov wrote: > > On Tue, Jul 07, 2026 at 06:06:59PM +0530, Bibek Kumar Patro wrote: > > > > > > > > > On 7/6/2026 11:09 PM, Dmitry Baryshkov wrote: > > > > On Mon, Jul 06, 2026 at 10:26:34PM +0530, Bibek Kumar Patro wrote: > > > > > Some SoC implementations require a bandwidth vote on an interconnect > > > > > path before the SMMU register space is accessible. Add the optional > > > > > > > > Why is it limited only to those SoCs? Is it also applicable to other > > > > Qualcomm SoCs? > > > > > > > > > > I was hoping to keep this series focused on the core infrastructure > > > changes: the bindings, base ICC bandwidth-voting support, and DT > > > interconnect properties for the platforms currently supported on > > > Qualcomm Linux and have been validated so far. > > > > > > The additional targets have not been tested yet, so I'd prefer > > > to add their support in a separate follow-up series once validation > > > is complete, rather than growing this series further. WDYT? > > > > Then it should be a part of the commit message. All SoCs since SDM12345 > > need to vote on the interconnect (and then, in the cover letter mention > > that you convert only a few of the SoCs). We possibly can help with > > testing on other platforms. > > > > Ack, sounds reasonable. > I'll add the first platform onwards which interconnect voting is required in > commit description. But to what degree is this related to a specific set of platforms? If we look ahead, aren't we expecting the list to grow to include all platforms in the end - resulting in a lot of noise and churn. Can you give an example of a platform where there is no interconnect path to vote for here or where it would be harmful to do so? > And update the cover letter to clarify that this series adds > support for the Qualcomm Linux-supported targets available today, and > the list will be expanded in follow-up series as additional platforms > are enabled. > The binding should not reflect what has been implemented and verified in Linux, it defines the contract between DeviceTree and the OS. Regards, Bjorn > Thanks & regards, > Bibek > > > > > > 'interconnects' property to the binding to allow platform DT nodes > > > > > to describe this path. > > > > > > > > > > Reviewed-by: Krzysztof Kozlowski > > > > > Signed-off-by: Bibek Kumar Patro > > > > > --- > > > > > .../devicetree/bindings/iommu/arm,smmu.yaml | 27 ++++++++++++++++++++++ > > > > > 1 file changed, 27 insertions(+) > > > > > > > >