Re: [GIT FIXES FOR v5.9] Remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

Em Fri, 11 Sep 2020 12:52:57 +0200
Hans Verkuil <hverkuil@xs4all.nl> escreveu:

> From the commit log of the patch:
> 
> --------------------------------------------------------------------
> The patch partially reverts some of the UAPI bits of the buffer
> cache management hints. Namely, the queue consistency (memory
> coherency) user-space hint because, as it turned out, the kernel
> implementation of this feature was misusing DMA_ATTR_NON_CONSISTENT.
> 
> The patch revers both kernel and user space parts: removes the
> DMA consistency attr functions, rolls back changes to v4l2_requestbuffers,
> v4l2_create_buffers structures and corresponding UAPI functions
> (plus compat32 layer) and cleans up the documentation.
> --------------------------------------------------------------------
> 
> The intention is that this feature will return once proper low-level support
> for this has been sorted. A patch to revert the v4l-utils changes is ready
> to be merged once this patch made it's way to our master branch:
> 
> https://patchwork.linuxtv.org/project/linux-media/patch/20200911030952.74468-1-sergey.senozhatsky@gmail.com/
> 
> I've tested this with the test-media script.
> 
> Regards,
> 
> 	Hans
> 
> The following changes since commit 93c16fabdb74a9c1a427402fc1fe588a45130c5b:
> 
>   media: ov8856: Add support for 3264x2448 mode (2020-09-10 14:29:35 +0200)
> 
> are available in the Git repository at:
> 
>   git://linuxtv.org/hverkuil/media_tree.git tags/br-v5.9-mem
> 
> for you to fetch changes up to d36642b40255022dda1cfcaebe82e40a592d4ee8:
> 
>   media/v4l2: remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag (2020-09-11 12:26:54 +0200)

This caused a warning when building the html books. Not sure why the robot
didn't warn. I'll be posting a fix at the ML.

Thanks,
Mauro