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 2C6D12D7DD7; Tue, 21 Apr 2026 12:43:36 +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=1776775416; cv=none; b=Z/RJA7VoEHomJDUtnOGCbtBqM11eydryeYhGGzw4dUkAtKdQ/3CNWE/dNmpAQDKCBAH2TE3NX0R5aq4y4ICMvUZcmQxZuiw5GkOUs4c/xNzKUz8DbJwjXN/ScK5F9xjyAxL/VRPSz24SJrR7l9cxLIoVDRMFZdeluVlD7qoFEnk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776775416; c=relaxed/simple; bh=+V8ZfRYrjzwJXgqe+fTwt5G7FKr8RN3Pd3uuU7wkOoo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=nKr7vVxX4hhEK0b3nQQ2nPz1JUOr6GUKr+Go0FwCJgJsFf0vSNhbhbSZwemnchnDtYyHAal+tdCEqy7oC0aq40Fy80+6533TRdXIbjUGSjnc3VaUMXbYmbxjP7ATkF7PH5j0gC53MJquj5ReLXfseTO/9RlznoiBHXE+KQ9LLdo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aKaBnixD; 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="aKaBnixD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4193C2BCB0; Tue, 21 Apr 2026 12:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776775416; bh=+V8ZfRYrjzwJXgqe+fTwt5G7FKr8RN3Pd3uuU7wkOoo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aKaBnixDB559hSNI2VTzNUIPYmrAI6E00jRbjPrOokUf/IxdtI+SshEpQoAyenhw8 76rWm2uvZ8+hauZIvZZX6A7nFC0SxJ6kMrA9ulppvSD3C+FJ/CzVar45/8h/DB2zcv YGLim2xCtfRLj1iQMqdaLuz8sX6dE1TTVXRbPe3a1uXohDZKA/UZJ6tPd6x5Wi16eZ T0URH9Vv45mpbG6NaRuAGhxQYk5PnNi6nxmwsm5JkQwEWynXiz5ODq1PfIo++vls3p MtaICJCnPo6Zj/5EBQN8gEOGsJsJFR+lVLiJOVhWYo/K5b9K+gK/6TjrA0rrben6Ud sTHdoBBwGyulA== Date: Tue, 21 Apr 2026 18:13:17 +0530 From: Sumit Garg To: Jorge Ramirez Cc: Trilok Soni , vikash.garodia@oss.qualcomm.com, 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, 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> <439f9bbf-1ba1-465f-b5af-01ba0ebb86d4@oss.qualcomm.com> Precedence: bulk X-Mailing-List: netdev@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: On Wed, Apr 08, 2026 at 09:32:39AM +0200, Jorge Ramirez wrote: > On 07/04/26 15:14:22, Trilok Soni wrote: > > On 4/6/2026 4:42 AM, Sumit Garg wrote: > > > 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. > > the patchset cover letter + the commit message + the OP-TEE pull request > being referenced gives the ilusion to users that with the current set > they will get something functional (they will get a broken video > platform instead if they try to use OP-TEE). > > That was the point I was making: IMO the commit message walks on a thin > line of "completeness" > > QTEE and OP-TEE at this time implement different use cases (Venus with > QTEE runs with Linux on EL1 , OP-TEE runs with Linux on EL2). So maybe > worth mentioning this divergence. > Sure, I can extend the cover letter to say media support with Linux at EL2 is missing for both OP-TEE and QTEE which is being worked on as a separate effort related to missing IOMMU support. -Sumit