linux-kernel - Re: [PATCH v5 00/10] add aspeed-jpeg support for aspeed-video

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Date:   Fri, 26 Nov 2021 16:17:20 +0800
From:   Jammy Huang <jammy_huang@...eedtech.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>, <eajames@...ux.ibm.com>,
        <mchehab@...nel.org>, <joel@....id.au>, <andrew@...id.au>,
        <sakari.ailus@...ux.intel.com>, <gregkh@...uxfoundation.org>,
        <laurent.pinchart@...asonboard.com>, <linux-media@...r.kernel.org>,
        <openbmc@...ts.ozlabs.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 00/10] add aspeed-jpeg support for aspeed-video

Hi Hans,

Please refer to Page 132, 'Video stream data format – ASPEED mode compression' of
https://github.com/AspeedTech-BMC/openbmc/releases/download/v07.02/SDK_User_Guide_v07.02.pdf

Is above information enough??
Or maybe we can postpone this series until the source code for this format ready.
I think I can accomplish it by the end of this year.

On 2021/11/25 下午 10:31, Hans Verkuil wrote:
> Hi Jammy,
>
> I suggest posting a v3 that moves the patches that deal with the
> Aspeed JPEG format to the end of the series. That way I can easily
> merge the patches up to that point, and the Aspeed JPEG support can
> be handled separately.
>
> I'm not sure if it can be merged without that format being documented,
> either in pixfmt-reserved.rst, by implementing support for it in
> libv4lconvert from v4l-utils, or by providing a URL to some other
> publicly available source code. We really don't like adding pixel
> formats that cannot be interpreted by someone without access to the
> datasheets.
>
> Regards,
>
> 	Hans
>
> On 18/11/2021 08:40, Jammy Huang wrote:
>> The aim of this series is to add aspeed-jpeg support for aspeed-video
>> driver.
>>
>> To achieve this major goal some refactors are included.
>>
>> In the last, debugfs information is also updated per this change.
>>
>> Changes in v5:
>>   - Use model data to tell different soc
>>
>> Changes in v4:
>>   - Add definition for the Aspeed JPEG format
>>   - Reserve controls for ASPEED
>>   - Use s_fmt to update format rather than new control
>>   - Update aspeed hq quality range, 1 ~ 12
>>
>>
>> Jammy Huang (10):
>>    media: aspeed: move err-handling together to the bottom
>>    media: aspeed: use v4l2_info/v4l2_warn/v4l2_dbg for log
>>    media: aspeed: add more debug log messages
>>    media: aspeed: refactor to gather format/compress settings
>>    media: v4l: Add definition for the Aspeed JPEG format
>>    media: v4l2-ctrls: Reserve controls for ASPEED
>>    media: aspeed: use model-data
>>    media: aspeed: Support aspeed mode to reduce compressed data
>>    media: aspeed: add comments and macro
>>    media: aspeed: Extend debug message
>>
>>   .../media/uapi/v4l/pixfmt-reserved.rst        |  12 +
>>   drivers/media/platform/aspeed-video.c         | 534 ++++++++++++++----
>>   drivers/media/v4l2-core/v4l2-ioctl.c          |   1 +
>>   include/uapi/linux/aspeed-video.h             |  15 +
>>   include/uapi/linux/v4l2-controls.h            |   5 +
>>   include/uapi/linux/videodev2.h                |   1 +
>>   6 files changed, 467 insertions(+), 101 deletions(-)
>>   create mode 100644 include/uapi/linux/aspeed-video.h
>>
-- 
Best Regards
Jammy