linux-kernel - Re: [PATCH 02/30] v4l: vxd-dec: Create mmu programming helper library

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Date:   Wed, 18 Aug 2021 16:37:18 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     sidraya.bj@...hpartnertech.com
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        prashanth.ka@...hpartnertech.com, praneeth@...com,
        mchehab@...nel.org, linux-media@...r.kernel.org,
        praveen.ap@...hpartnertech.com
Subject: Re: [PATCH 02/30] v4l: vxd-dec: Create mmu programming helper library

On Wed, Aug 18, 2021 at 07:40:09PM +0530, sidraya.bj@...hpartnertech.com wrote:
> From: Sidraya <sidraya.bj@...hpartnertech.com>
> 
> The IMG D5520 has an MMU which needs to be programmed with all
> memory which it needs access to. This includes input buffers,
> output buffers and parameter buffers for each decode instance,
> as well as common buffers for firmware, etc.
> 
> Functions are provided for creating MMU directories (each stream
> will have it's own MMU context), retrieving the directory page,
> and mapping/unmapping a buffer into the MMU for a specific MMU context.
> 
> Also helper(s) are provided for querying the capabilities of the MMU.
> 
> Signed-off-by: Buddy Liong <buddy.liong@...com>
> Signed-off-by: Angela Stegmaier <angelabaker@...com>
> Signed-off-by: Sidraya <sidraya.bj@...hpartnertech.com>
> ---
>  MAINTAINERS                               |   2 +
>  drivers/staging/media/vxd/common/imgmmu.c | 782 ++++++++++++++++++++++
>  drivers/staging/media/vxd/common/imgmmu.h | 180 +++++

Why are you adding new stuff to staging?  Why can it not just go to the
"real" part of the kernel?

If it is to go into staging, we need a TODO file that lists what needs
to be done to get it out of staging.

thanks,

greg k-h