linux-kernel - Re: [PATCH v5 0/2] media: uvcvideo: Support partial control reads and minor changes

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Message-ID: <f6045267-6398-494e-8058-0d451b84c7c9@redhat.com>
Date: Mon, 2 Dec 2024 15:54:37 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Ricardo Ribalda <ribalda@...omium.org>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 Sakari Ailus <sakari.ailus@...ux.intel.com>, stable@...r.kernel.org
Subject: Re: [PATCH v5 0/2] media: uvcvideo: Support partial control reads and
 minor changes

Hi,

On 28-Nov-24 9:53 PM, Ricardo Ribalda wrote:
> Some cameras do not return all the bytes requested from a control
> if it can fit in less bytes. Eg: returning 0xab instead of 0x00ab.
> Support these devices.
> 
> Also, now that we are at it, improve uvc_query_ctrl() logging.
> 
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>

Thank you for the new version, I've replaced the 2 patches in:
https://gitlab.freedesktop.org/linux-media/users/uvc/-/commits/next/

with this new version.

Regards,

Hans

 
> ---
> Changes in v5:
> - Improve comment.
> - Link to v4: https://lore.kernel.org/r/20241120-uvc-readless-v4-0-4672dbef3d46@chromium.org
> 
> Changes in v4:
> - Improve comment.
> - Keep old likely(ret == size)
> - Link to v3: https://lore.kernel.org/r/20241118-uvc-readless-v3-0-d97c1a3084d0@chromium.org
> 
> Changes in v3:
> - Improve documentation.
> - Do not change return sequence.
> - Use dev_ratelimit and dev_warn_once
> - Link to v2: https://lore.kernel.org/r/20241008-uvc-readless-v2-0-04d9d51aee56@chromium.org
> 
> Changes in v2:
> - Rewrite error handling (Thanks Sakari)
> - Discard 2/3. It is not needed after rewriting the error handling.
> - Link to v1: https://lore.kernel.org/r/20241008-uvc-readless-v1-0-042ac4581f44@chromium.org
> 
> ---
> Ricardo Ribalda (2):
>       media: uvcvideo: Support partial control reads
>       media: uvcvideo: Add more logging to uvc_query_ctrl()
> 
>  drivers/media/usb/uvc/uvc_video.c | 27 ++++++++++++++++++++++++++-
>  1 file changed, 26 insertions(+), 1 deletion(-)
> ---
> base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc
> change-id: 20241008-uvc-readless-23f9b8cad0b3
> 
> Best regards,