From: Vikash Garodia <vikash.garodia@oss.qualcomm.com>
To: Bryan O'Donoghue <bod@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Cc: Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
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AngeloGioacchino Del Regno
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Rajendra Nayak <quic_rjendra@quicinc.com>,
Jonathan Marek <jonathan@marek.ca>,
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Renjiang Han <quic_renjiang@quicinc.com>,
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linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>,
Daniel J Blueman <daniel@quora.org>,
stable@vger.kernel.org
Subject: Re: [PATCH 04/22] arm64: dts: qcom: hamoa: Reserve low IOVA range for Iris
Date: Wed, 12 Aug 2026 16:34:41 +0530 [thread overview]
Message-ID: <9a31395d-15ca-4e74-b906-2cd5b56e0529@oss.qualcomm.com> (raw)
In-Reply-To: <f2814e0c-15a9-4b7b-bd13-edca6c007e1f@kernel.org>
On 8/12/2026 10:49 AM, Bryan O'Donoghue wrote:
> On 11/08/2026 01:17, Dmitry Baryshkov wrote:
>>> You are well aware of them, but still asking the same. Reasons,
>>> 1. We have been attempting the subnodes for almost a year with multiple
>>> pushbacks from multiple maintainers. We are closer and working on it
>>> to post
>>> for iris, followed by venus, once review is acceptable for iris.
>> I think that we should have concentrated on it. From my point of view,
>> the subnodes solution is ready and the last obstacle was the
>> under-informing commit message. As you can see, Rob has (had?) questions
>> about this solution too.
>
> Its taking too long.
>
> I just suggested restricting concurrency but, that can't be right. The
> issue is IOVA - concurrency merely makes the bug more _likely_ to show
> up so in fact that won't work.
>
> -rc1 hits soon, if sub-nodes isn't ready to go by that point there is no
> choice but to implement BROKEN or minItems, 100% up to qcom to decide
> which.
>
minItems is the way which could easily fix and patch all the kernels
exposed with the known bug.
At the same time, we have identified a way to even reserve this in
driver now (venus/iris) with [1] and the results are good with this as
well. If not minItems, would prefer [1] in -rc1 to avoid further delays
or to keep the crash exposed. Please review.
https://lore.kernel.org/linux-media/20260812-reserve_iova_in_driver-v1-0-ed62f801275c@oss.qualcomm.com/
Regards,
Vikash
> ---
> bod
next prev parent reply other threads:[~2026-08-12 11:04 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5BXSXMNl656WiJPJAMmHvb3I2NzYMshRZuGuub3CxEXvdCUlIDKYbnv5jUq-pa6P1NibBLkO3njnKGxi7Al3jQ==@protonmail.internalid>
2026-08-07 8:24 ` [PATCH 00/22] media: iris: Restrict lower IOVA range for Venus and Iris VPUs Vikash Garodia
2026-08-07 8:24 ` [PATCH 01/22] dt-bindings: media: qcom,venus-common: Allow IOVA reservation memory-region Vikash Garodia
2026-08-07 8:49 ` sashiko-bot
2026-08-07 8:51 ` Vikash Garodia
2026-08-07 8:24 ` [PATCH 02/22] dt-bindings: media: qcom,sm8550-iris: " Vikash Garodia
2026-08-07 8:40 ` sashiko-bot
2026-08-07 9:01 ` Dmitry Baryshkov
2026-08-07 8:24 ` [PATCH 03/22] dt-bindings: media: qcom,sc7180-venus: " Vikash Garodia
2026-08-07 8:24 ` [PATCH 04/22] arm64: dts: qcom: hamoa: Reserve low IOVA range for Iris Vikash Garodia
2026-08-07 8:45 ` sashiko-bot
2026-08-07 9:03 ` Dmitry Baryshkov
2026-08-07 9:26 ` Vikash Garodia
2026-08-07 10:00 ` Dmitry Baryshkov
2026-08-07 10:22 ` Vikash Garodia
2026-08-07 13:18 ` Bryan O'Donoghue
2026-08-08 15:48 ` Vikash Garodia
2026-08-10 12:10 ` Dmitry Baryshkov
2026-08-10 16:57 ` Vikash Garodia
2026-08-11 0:17 ` Dmitry Baryshkov
2026-08-12 5:19 ` Bryan O'Donoghue
2026-08-12 11:04 ` Vikash Garodia [this message]
2026-08-12 5:02 ` Bryan O'Donoghue
2026-08-12 12:46 ` Dmitry Baryshkov
2026-08-12 15:45 ` Vikash Garodia
2026-08-12 16:24 ` Dmitry Baryshkov
2026-08-07 16:24 ` Rob Herring
2026-08-08 4:37 ` Vishnu Reddy
2026-08-08 9:55 ` Bryan O'Donoghue
2026-08-10 13:47 ` Rob Herring
2026-08-12 15:44 ` Vikash Garodia
2026-08-12 16:09 ` Krzysztof Kozlowski
2026-08-07 8:24 ` [PATCH 05/22] arm64: dts: qcom: lemans: " Vikash Garodia
2026-08-07 8:44 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 06/22] arm64: dts: qcom: monaco: " Vikash Garodia
2026-08-07 8:47 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 07/22] arm64: dts: qcom: sc8280xp: " Vikash Garodia
2026-08-07 8:44 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 08/22] arm64: dts: qcom: sm8350: " Vikash Garodia
2026-08-07 8:50 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 09/22] arm64: dts: qcom: sm8550: " Vikash Garodia
2026-08-07 8:46 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 10/22] arm64: dts: qcom: sm8650: " Vikash Garodia
2026-08-07 8:42 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 11/22] arm64: dts: qcom: sm8750: " Vikash Garodia
2026-08-07 8:54 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 12/22] arm64: dts: qcom: agatti: Reserve low IOVA range for Venus Vikash Garodia
2026-08-07 8:57 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 13/22] arm64: dts: qcom: kodiak: " Vikash Garodia
2026-08-07 8:54 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 14/22] arm64: dts: qcom: msm8916: " Vikash Garodia
2026-08-07 8:58 ` sashiko-bot
2026-08-07 8:24 ` [PATCH 15/22] arm64: dts: qcom: msm8996: " Vikash Garodia
2026-08-07 8:25 ` [PATCH 16/22] arm64: dts: qcom: msm8998: " Vikash Garodia
2026-08-07 8:25 ` [PATCH 17/22] arm64: dts: qcom: sc7180: " Vikash Garodia
2026-08-07 8:59 ` sashiko-bot
2026-08-07 8:25 ` [PATCH 18/22] arm64: dts: qcom: sdm630: " Vikash Garodia
2026-08-07 9:00 ` sashiko-bot
2026-08-07 8:25 ` [PATCH 19/22] arm64: dts: qcom: sdm845: " Vikash Garodia
2026-08-07 8:25 ` [PATCH 20/22] arm64: dts: qcom: sm6115: " Vikash Garodia
2026-08-07 9:05 ` sashiko-bot
2026-08-07 8:25 ` [PATCH 21/22] arm64: dts: qcom: sm8250: " Vikash Garodia
2026-08-07 8:25 ` [PATCH 22/22] arm64: dts: qcom: talos: " Vikash Garodia
2026-08-07 9:08 ` sashiko-bot
2026-08-07 8:51 ` [PATCH 00/22] media: iris: Restrict lower IOVA range for Venus and Iris VPUs Bryan O'Donoghue
2026-08-07 8:59 ` Dmitry Baryshkov
2026-08-07 9:05 ` Vikash Garodia
2026-08-07 10:01 ` Dmitry Baryshkov
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