From: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Vikash Garodia <vikash.garodia@oss.qualcomm.com>,
Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Bryan O'Donoghue <bod@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Stanimir Varbanov <stanimir.varbanov@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Hans Verkuil <hverkuil@kernel.org>,
Stefan Schmidt <stefan.schmidt@linaro.org>,
Hans Verkuil <hverkuil+cisco@kernel.org>,
Mansur Alisha Shaik <mansur@codeaurora.org>,
linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
stable@vger.kernel.org,
Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Subject: Re: [PATCH v2 3/5] arm64: dts: qcom: sc7280: Add dma-coherent property into venus node
Date: Mon, 24 Aug 2026 10:51:14 +0530 [thread overview]
Message-ID: <a16e9d90-2cf4-134a-6701-ba729b24e78e@oss.qualcomm.com> (raw)
In-Reply-To: <20260819-daffy-armored-angelfish-3be5b1@quoll>
On 8/19/2026 12:46 PM, Krzysztof Kozlowski wrote:
> On Tue, Aug 18, 2026 at 09:24:16PM +0530, Vishnu Reddy wrote:
>> The venus video hardware on SC7280 is IO-coherent hardware: even though
>> the driver does dma_sync*() calls for the input and output buffers, the
>> venus node still needs to declare dma-coherent so that the DMA mapping
>> layer relies on this hardware level snooping to keep the CPU cache and
>> the DMA buffers in sync. This avoids the unnecessary cache clean or
>> invalidate operations performed by the dma_sync*() calls, which are not
>> required once hardware level snooping is enabled via dma-coherent.
>>
>> Add the dma-coherent property to the venus node to describe this
>> hardware capability.
>>
>> Fixes: 37613aee2179 ("arm64: dts: qcom: sc7280: Add venus DT node")
>> Cc: stable@vger.kernel.org
> Nope, nothing to be fixed here. I already said it last time.
I'll remove it.
> Best regards,
> Krzysztof
>
>
next prev parent reply other threads:[~2026-08-24 5:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-18 15:54 [PATCH v2 0/5] media: iris: Fix DMA coherency, power-off ordering, and frame interval issues Vishnu Reddy
2026-08-18 15:54 ` [PATCH v2 1/5] media: iris: Add dma sync calls for input and output buffers Vishnu Reddy
2026-08-18 16:03 ` sashiko-bot
2026-08-18 22:47 ` Dmitry Baryshkov
2026-08-24 5:15 ` Vishnu Reddy
2026-08-18 22:41 ` Dmitry Baryshkov
2026-08-24 5:12 ` Vishnu Reddy
2026-08-18 15:54 ` [PATCH v2 2/5] dt-bindings: media: qcom,sc7280-venus: Add dma-coherent property Vishnu Reddy
2026-08-18 21:52 ` Rob Herring (Arm)
2026-08-18 22:46 ` Dmitry Baryshkov
2026-08-19 7:15 ` Krzysztof Kozlowski
2026-08-24 5:19 ` Vishnu Reddy
2026-08-18 15:54 ` [PATCH v2 3/5] arm64: dts: qcom: sc7280: Add dma-coherent property into venus node Vishnu Reddy
2026-08-19 7:16 ` Krzysztof Kozlowski
2026-08-24 5:21 ` Vishnu Reddy [this message]
2026-08-18 15:54 ` [PATCH v2 4/5] media: iris: Fix power-off ordering to disable power domain after clocks Vishnu Reddy
2026-08-18 16:05 ` sashiko-bot
2026-08-19 7:18 ` Krzysztof Kozlowski
2026-08-18 15:54 ` [PATCH v2 5/5] media: iris: Fix frame interval enumeration for non-divisor framerates Vishnu Reddy
2026-08-19 7:17 ` Krzysztof Kozlowski
2026-08-24 5:11 ` Vishnu Reddy
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=a16e9d90-2cf4-134a-6701-ba729b24e78e@oss.qualcomm.com \
--to=busanna.reddy@oss.qualcomm.com \
--cc=abhinav.kumar@linux.dev \
--cc=andersson@kernel.org \
--cc=bod@kernel.org \
--cc=bryan.odonoghue@linaro.org \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dikshita.agarwal@oss.qualcomm.com \
--cc=hverkuil+cisco@kernel.org \
--cc=hverkuil@kernel.org \
--cc=konradybcio@kernel.org \
--cc=krzk+dt@kernel.org \
--cc=krzk@kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mansur@codeaurora.org \
--cc=mchehab@kernel.org \
--cc=robh@kernel.org \
--cc=stable@vger.kernel.org \
--cc=stanimir.varbanov@linaro.org \
--cc=stefan.schmidt@linaro.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.