From: Sumit Garg <sumit.garg@kernel.org>
To: Jorge Ramirez <jorge.ramirez@oss.qualcomm.com>,
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,
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skare@qti.qualcomm.com, harshal.dev@oss.qualcomm.com,
linux-kernel@vger.kernel.org,
Sumit Garg <sumit.garg@oss.qualcomm.com>
Subject: Re: [PATCH v3 11/15] media: qcom: Switch to generic PAS TZ APIs
Date: Mon, 6 Apr 2026 17:12:42 +0530 [thread overview]
Message-ID: <adOcMsk8a_Clb4WZ@sumit-xelite> (raw)
In-Reply-To: <ac-KQ7e8-syph1Zl@trex>
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 <sumit.garg@oss.qualcomm.com>
> >
> > 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
next prev parent reply other threads:[~2026-04-06 11:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 13:10 [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support Sumit Garg
2026-03-27 13:10 ` [PATCH v3 01/15] arm64: dts: qcom: kodiak: Add EL2 overlay Sumit Garg
2026-03-27 13:10 ` [PATCH v3 02/15] firmware: qcom: Add a generic PAS service Sumit Garg
2026-03-27 13:10 ` [PATCH v3 03/15] firmware: qcom_scm: Migrate to " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 04/15] firmware: qcom: Add a PAS TEE service Sumit Garg
2026-03-30 10:36 ` Harshal Dev
2026-04-02 6:23 ` Sumit Garg
2026-03-27 13:10 ` [PATCH v3 05/15] remoteproc: qcom_q6v5_pas: Switch over to generic PAS TZ APIs Sumit Garg
2026-03-27 13:10 ` [PATCH v3 06/15] remoteproc: qcom_q6v5_mss: Switch " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 07/15] soc: qcom: mdtloader: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 08/15] remoteproc: qcom_wcnss: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 09/15] remoteproc: qcom: Select QCOM_PAS generic service Sumit Garg
2026-03-27 13:10 ` [PATCH v3 10/15] drm/msm: Switch to generic PAS TZ APIs Sumit Garg
2026-03-27 13:10 ` [PATCH v3 11/15] media: qcom: " Sumit Garg
2026-04-03 9:37 ` Jorge Ramirez
2026-04-06 11:42 ` Sumit Garg [this message]
2026-03-27 13:10 ` [PATCH v3 12/15] net: ipa: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 13/15] wifi: ath12k: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 14/15] firmware: qcom_scm: Remove SCM PAS wrappers Sumit Garg
2026-03-27 13:10 ` [PATCH v3 15/15] MAINTAINERS: Add maintainer entry for Qualcomm PAS TZ service Sumit Garg
2026-04-06 15:09 ` [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support Bjorn Andersson
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