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 0186C153BE9; Mon, 6 Apr 2026 11:42:59 +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=1775475780; cv=none; b=h8Te5bBtV4QVR23KndBXyQc0os1Eu9f+uID/pnk61A/plrunhAn5/OmUSvPKVSrpajOThIz9pxPo/QINEdS1XLutZC2eMDeHgiIWENvZ6eb6Zt7MN76SIyxk+snwTP6VVSJ7Q2kw/1NL8nrriNEUW4pCZsJ6Ux3ta0JVgqA/rSA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775475780; c=relaxed/simple; bh=FGRHUXyR+0IYeCGEAzCaangJ4UIXGFGgJFbwE4z892Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pnQsDCXTavBN/Tm/+F1kKE3/t+DkL3UIbDbmTic164eCWznorYRbpGG9m+b3XOHlku2Fgi19+clKxZUrVjXvq3KW139xV+VhGOC7wCEiv4yVUH784xxVwecqzo6R6/q35T6aBnyXIROTjQXIY7RJYnXcNjblX5LVrskjKspJzR8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uEwkjpkg; 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="uEwkjpkg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 716F7C4CEF7; Mon, 6 Apr 2026 11:42:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775475779; bh=FGRHUXyR+0IYeCGEAzCaangJ4UIXGFGgJFbwE4z892Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=uEwkjpkgZJJUgzLAMipZqb7S3m6PFvmEe1MRqsi12pNbrWPbTPr+/ozV0WB4e3kwc wUFFUuEvlco8X0oM3WIbq9yPqBJEUoDRTdYVLYUFB2rLHKjh8gNzdqJKD/ZZA+/iG9 1xttCsrneXaxcIrBL9n1jqQndgGGSU6R9UiOuHMqxrC6g8cjPDhBpYAasm+A5RKcHR nV9r4Cclk4K062pas6X6TeGAxUgQ9hdOz1Jzos5uBp1OPKQb3IZujuUKw/GO3+cLck va/Idz0NKezYCEsD/GzpcK2QssI9WrYqRPMFymOo9jE/73sGxbCzQuYHAdNKM1hmip dP8d3gB/fbK0A== Date: Mon, 6 Apr 2026 17:12:42 +0530 From: Sumit Garg To: Jorge Ramirez , vikash.garodia@oss.qualcomm.com Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-media@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-remoteproc@vger.kernel.org, andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, robin.clark@oss.qualcomm.com, sean@poorly.run, akhilpo@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, jesszhan0024@gmail.com, marijn.suijten@somainline.org, airlied@gmail.com, simona@ffwll.ch, dikshita.agarwal@oss.qualcomm.com, bod@kernel.org, mchehab@kernel.org, elder@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jjohnson@kernel.org, mathieu.poirier@linaro.org, trilokkumar.soni@oss.qualcomm.com, mukesh.ojha@oss.qualcomm.com, pavan.kondeti@oss.qualcomm.com, tonyh@qti.qualcomm.com, vignesh.viswanathan@oss.qualcomm.com, srinivas.kandagatla@oss.qualcomm.com, amirreza.zarrabi@oss.qualcomm.com, jens.wiklander@linaro.org, op-tee@lists.trustedfirmware.org, apurupa@qti.qualcomm.com, skare@qti.qualcomm.com, harshal.dev@oss.qualcomm.com, linux-kernel@vger.kernel.org, Sumit Garg Subject: Re: [PATCH v3 11/15] media: qcom: Switch to generic PAS TZ APIs Message-ID: References: <20260327131043.627120-1-sumit.garg@kernel.org> <20260327131043.627120-12-sumit.garg@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hi Jorge, On Fri, Apr 03, 2026 at 11:37:07AM +0200, Jorge Ramirez wrote: > On 27/03/26 18:40:39, Sumit Garg wrote: > > From: Sumit Garg > > > > Switch qcom media client drivers over to generic PAS TZ APIs. Generic PAS > > TZ service allows to support multiple TZ implementation backends like QTEE > > based SCM PAS service, OP-TEE based PAS service and any further future TZ > > backend service. > > OP-TEE based PAS service relies on the linux driver to configure the > iommu (just as it is done on the no_tz case). This generic patch does > not cover that requirement. That's exactly the reason why the kodiak EL2 dtso disables venus by default in patch #1 due to missing IOMMU configuration. > > Because of that, it is probably better if the commit message doesnt > mention OP-TEE and instead maybe indicate that PAS wll support TEEs that > implement the same restrictions that QTEE (ie, iommu configuration). The scope for this patch is to just adopt the generic PAS layer without affecting the client functionality. > > I can send an RFC for OP-TEE support based on the integration work being > carried out here [1] @Vikash may know better details about support for IOMMU configuration for venus since it's a generic functionality missing when Linux runs in EL2 whether it's with QTEE or OP-TEE. However, feel free to propose your work to initiate discussions again. > > [1] https://github.com/OP-TEE/optee_os/pull/7721#discussion_r3016923507 -Sumit