linux-kernel - Re: [PATCH 1/2] media: iris: Add support for QC08C format for decoder

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Message-ID: <d603c0d3-4dd5-4ea0-8a31-47e6dd03ffd7@kernel.org>
Date: Wed, 1 Oct 2025 16:04:30 +0100
From: Bryan O'Donoghue <bod@...nel.org>
To: Neil Armstrong <neil.armstrong@...aro.org>,
 Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
 Vikash Garodia <vikash.garodia@....qualcomm.com>,
 Abhinav Kumar <abhinav.kumar@...ux.dev>,
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] media: iris: Add support for QC08C format for decoder

On 01/10/2025 09:36, Neil Armstrong wrote:
> On 9/24/25 15:28, Bryan O'Donoghue wrote:
>> On 19/09/2025 16:47, Dikshita Agarwal wrote:
>>> Introduce handling for the QC08C format in the decoder.
>>> Update format checks and configuration to enable decoding of QC08C
>>> streams.
>>
>> Since QC08C is a Qualcomm specific pixel format, you should detail in your commit log exactly what the packing/ordering of pixels is.
>>
>> In other words tell the reader more about QC08C.
> 
> This has been upstreamed 3y ago for venus, which is the same as iris:
> https://lore.kernel.org/all/20220117155559.234026-1-stanimir.varbanov@linaro.org/
> 
> No need to re-explain it for iris, the format is the same.
> 
> Neil
Yeah no, at a minimum the explanation of NV12 + UBWC should appear in 
the commit log for this format.

thx
---
bod