linux-kernel - Re: [PATCH 0/2] Add support for QC08C format in iris driver

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Message-ID: <a2303c78-ea41-f5bc-33d1-9f21b9fc55de@oss.qualcomm.com>
Date: Wed, 1 Oct 2025 14:30:30 +0530
From: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
        Vikash Garodia <vikash.garodia@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bod@...nel.org>,
        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 0/2] Add support for QC08C format in iris driver



On 10/1/2025 2:09 PM, Neil Armstrong wrote:
> Hi,
> 
> On 9/19/25 17:47, Dikshita Agarwal wrote:
>> Add support for the QC08C color format in both the encoder and decoder
>> paths of the iris driver. The changes include:
>>
>> - Adding QC08C format handling in the driver for both encoding and
>> decoding.
>> - Updating format enumeration to properly return supported formats.
>> - Ensuring the correct HFI format is set for firmware communication.
>> -Making all related changes required for seamless integration of QC08C
>> support.
>>
>> The changes have been validated using v4l2-ctl, compliance, and GStreamer
>> (GST) tests.
>> Both GST and v4l2-ctl tests were performed using the NV12 format, as
>> these clients do not support the QCOM-specific QC08C format, and all
>> tests passed successfully.
> 
> Sorry but this means you didn't test the full decoding and encoding with
> GST and v4l2-ctl using QC08C ?
> So how did you test ?

I have tested the decoding and decoding with QC08C using
https://github.com/quic/v4l-video-test-app

Thanks,
Dikshita

> 
> Thanks,
> Neil
> 
>>
>> During v4l2-ctl testing, a regression was observed when using the NV12
>> color format after adding QC08C support. A fix for this regression has
>> also been posted [1].
>>
>> [1]:
>> https://lore.kernel.org/linux-media/20250918103235.4066441-1-dikshita.agarwal@oss.qualcomm.com/T/#u
>>
>> Signed-off-by: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>
>> ---
>> Dikshita Agarwal (2):
>>        media: iris: Add support for QC08C format for decoder
>>        media: iris: Add support for QC08C format for encoder
>>
>>   drivers/media/platform/qcom/iris/iris_buffer.c     | 17 ++++--
>>   .../platform/qcom/iris/iris_hfi_gen1_command.c     | 15 ++++--
>>   .../platform/qcom/iris/iris_hfi_gen2_command.c     | 21 +++++++-
>>   .../platform/qcom/iris/iris_hfi_gen2_defines.h     |  1 +
>>   drivers/media/platform/qcom/iris/iris_instance.h   |  7 ++-
>>   .../media/platform/qcom/iris/iris_platform_gen2.c  |  1 +
>>   drivers/media/platform/qcom/iris/iris_utils.c      |  3 +-
>>   drivers/media/platform/qcom/iris/iris_vdec.c       | 61
>> ++++++++++++++++++----
>>   drivers/media/platform/qcom/iris/iris_venc.c       | 59
>> +++++++++++++++++----
>>   9 files changed, 152 insertions(+), 33 deletions(-)
>> ---
>> base-commit: 40b7a19f321e65789612ebaca966472055dab48c
>> change-id: 20250918-video-iris-ubwc-enable-87eac6f41fa4
>>
>> Best regards,
>