linux-kernel - Re: [PATCH v3] media: iris: Refine internal buffer reconfiguration logic for resolution change

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Message-ID: <ba589a5d-65b8-4980-937a-29598e891dd8@oss.qualcomm.com>
Date: Wed, 5 Nov 2025 17:13:27 +0530
From: Vikash Garodia <vikash.garodia@....qualcomm.com>
To: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bod@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...nel.org>,
        Stefan Schmidt <stefan.schmidt@...aro.org>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Val Packett <val@...kett.cool>
Subject: Re: [PATCH v3] media: iris: Refine internal buffer reconfiguration
 logic for resolution change

On 11/5/2025 11:17 AM, Dikshita Agarwal wrote:
> Improve the condition used to determine when input internal buffers need
> to be reconfigured during streamon on the capture port. Previously, the
> check relied on the INPUT_PAUSE sub-state, which was also being set
> during seek operations. This led to input buffers being queued multiple
> times to the firmware, causing session errors due to duplicate buffer
> submissions.
>
> This change introduces a more accurate check using the FIRST_IPSC and
> DRC sub-states to ensure that input buffer reconfiguration is triggered
> only during resolution change scenarios, such as streamoff/on on the
> capture port. This avoids duplicate buffer queuing during seek
> operations.
>
> Fixes: c1f8b2cc72ec ("media: iris: handle streamoff/on from client in dynamic resolution change")
> Cc:stable@...r.kernel.org
> Reported-by: Val Packett<val@...kett.cool>
> Closes:https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4700
> Signed-off-by: Dikshita Agarwal<dikshita.agarwal@....qualcomm.com>

Reviewed-by: Vikash Garodia<vikash.garodia@....qualcomm.com>