From: Bryan O'Donoghue <bod@kernel.org>
To: Vikash Garodia <vikash.garodia@oss.qualcomm.com>,
Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
Subject: Re: [RFC PATCH 07/11] arm64: dts: qcom: hamoa: Move Iris IOMMUs to sub nodes
Date: Fri, 10 Jul 2026 11:48:58 +0100 [thread overview]
Message-ID: <6c7a7788-d000-4f86-9999-f2cfc147ed14@kernel.org> (raw)
In-Reply-To: <20260709-vpu_iommu_iova_handling-v1-7-72bb62cb2dfd@oss.qualcomm.com>
On 09/07/2026 13:35, Vikash Garodia wrote:
> The Iris VPU has separate streams with different IOVA constraints. The
> non-pixel stream must be limited to the 0-600 MB IOVA range, while the
> pixel stream can use the full IOVA space.
> Using a single set of IOMMU entries for the Iris node does not describe
> these per-stream limits and can allow accesses outside the supported
> range, which may lead to device crashes. One such issue was reported at:
> https://gitlab.freedesktop.org/drm/msm/-/work_items/100
>
> Add non-pixel and pixel child nodes, move each stream ID to its
> corresponding child node, and add a reserved IOVA range for the
> non-pixel stream.
>
> Co-developed-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
> Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
> Signed-off-by: Vikash Garodia <vikash.garodia@oss.qualcomm.com>
In light of this patch, we should put a pause on Daniel's workaround.
---
bod
next prev parent reply other threads:[~2026-07-10 10:49 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <7GAZnP6jPoRrcDnaVzeaB98cONLhtvbiEXV1yD5MJJrA9pCnC9lmlSiCGA8vlDezSXADjmFiqo3ZdClO5SxCFA==@protonmail.internalid>
2026-07-09 12:35 ` [RFC PATCH 00/11] : media: iris: Migrate iommus to iris sub nodes Vikash Garodia
2026-07-09 12:35 ` [RFC PATCH 01/11] dt-bindings: media: qcom,sm8550-iris: Add vpu " Vikash Garodia
2026-07-09 12:46 ` sashiko-bot
2026-07-09 12:50 ` Dmitry Baryshkov
2026-07-10 6:02 ` Vikash Garodia
2026-07-10 15:53 ` Dmitry Baryshkov
2026-07-11 5:46 ` Vikash Garodia
2026-07-10 22:02 ` Bryan O'Donoghue
2026-07-09 12:35 ` [RFC PATCH 02/11] media: iris: Add hooks to initialize and tear down context banks Vikash Garodia
2026-07-09 12:57 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 03/11] media: iris: Add helper to create a context bank device Vikash Garodia
2026-07-09 13:10 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 04/11] media: iris: Add helper to select relevant " Vikash Garodia
2026-07-09 12:35 ` [RFC PATCH 05/11] media: iris: Skip DMA mask setting to core device when IOMMU is not mapped Vikash Garodia
2026-07-09 13:10 ` Dmitry Baryshkov
2026-07-09 13:43 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 06/11] media: iris: Add hooks for pixel and non-pixel context banks Vikash Garodia
2026-07-09 13:14 ` Dmitry Baryshkov
2026-07-10 6:32 ` Vikash Garodia
2026-07-10 16:03 ` Dmitry Baryshkov
2026-07-09 13:54 ` sashiko-bot
2026-07-10 16:12 ` Dmitry Baryshkov
2026-07-09 12:35 ` [RFC PATCH 07/11] arm64: dts: qcom: hamoa: Move Iris IOMMUs to sub nodes Vikash Garodia
2026-07-09 13:03 ` Dmitry Baryshkov
2026-07-10 6:05 ` Vikash Garodia
2026-07-10 21:05 ` Dmitry Baryshkov
2026-07-09 14:10 ` sashiko-bot
2026-07-10 10:48 ` Bryan O'Donoghue [this message]
2026-07-10 22:46 ` Bryan O'Donoghue
2026-07-09 12:35 ` [RFC PATCH 08/11] arm64: dts: qcom: sm8550: Move Iris IOMMUs to child nodes Vikash Garodia
2026-07-09 14:30 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 09/11] arm64: dts: qcom: lemans: " Vikash Garodia
2026-07-09 14:44 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 10/11] arm64: dts: qcom: monaco: " Vikash Garodia
2026-07-09 15:03 ` sashiko-bot
2026-07-09 12:35 ` [RFC PATCH 11/11] arm64: dts: qcom: sm8650: " Vikash Garodia
2026-07-09 15:29 ` sashiko-bot
2026-07-10 10:35 ` [RFC PATCH 00/11] : media: iris: Migrate iommus to iris sub nodes Bryan O'Donoghue
2026-07-10 13:36 ` Vikash Garodia
2026-07-10 13:38 ` Bryan O'Donoghue
2026-07-10 14:02 ` Vikash Garodia
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6c7a7788-d000-4f86-9999-f2cfc147ed14@kernel.org \
--to=bod@kernel.org \
--cc=abhinav.kumar@linux.dev \
--cc=andersson@kernel.org \
--cc=busanna.reddy@oss.qualcomm.com \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dikshita.agarwal@oss.qualcomm.com \
--cc=konradybcio@kernel.org \
--cc=krzk+dt@kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=robh@kernel.org \
--cc=vikash.garodia@oss.qualcomm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox