linux-kernel - Re: [PATCH 1/3] media: vimc: move private defines to a common header

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Date:   Mon, 12 Aug 2019 08:19:27 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        helen.koike@...labora.com,
        André Almeida <andrealmeid@...labora.com>
Cc:     mchehab@...nel.org, hverkuil@...all.nl,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH 1/3] media: vimc: move private defines to a common header

Hi Laurent,

On 8/10/19 8:14 AM, Laurent Pinchart wrote:
> Hi Shuah,
> 
> Thank you for the patch.
> 
> On Fri, Aug 09, 2019 at 03:45:41PM -0600, Shuah Khan wrote:
>> In preparation for collapsing the component driver structure into
>> a monolith, move private device structure defines to a new common
>> header file.
> 
> Apart from the vimc_device structure, this doesn't seem to be needed.
> I'd rather keep each structure private to the .c file that handles it,
> and only share vimc_device globally.
> 

Right. I initially thought that I needed these global. Once I completed
the patches without needing these as global, I overlooked updating the
patches.

I will take care of that. Any thoughts on vimc.h vs. adding vimc_device
struct to existing vimc-common.h

As I explained to Helen in response to her comment about:

"My thinking is that vimc-common.h is common for all the subdevs and
putting vimc-core defines and structures it shares it with the subdev
files can be in a separate file.

It is more of design choice to keep structures and defined organized.
Originally I was thinking all the subdev device structires need to be
global, and my patch set I sent out as such doesn't need that. I just
overlooked that when I sent the patches out.

This reduces the number of things that need to be common, I don't really
have any strong reasons for either choice of adding common defines to
vimc-common.h vs vimc.h - maybe with a slight tilt towards vimc.h"

Thanks all for a quick review and testing. I will work on v2 with your
comments. I want to make sure topology either looks the same as what
is in media master. I think it is, but I want to double check.

thanks,
-- Shuah