linux-kernel - Re: [PATCH 0/4] drm: core: Convert logging to drm_* functions.

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Date:   Sat, 11 Jul 2020 20:41:26 +0530
From:   Suraj Upadhyay <usuraj35@...il.com>
To:     Sam Ravnborg <sam@...nborg.org>, maarten.lankhorst@...ux.intel.com,
        mripard@...nel.org, tzimmermann@...e.de, airlied@...ux.ie,
        daniel@...ll.ch
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 0/4] drm: core: Convert logging to drm_* functions.

On Fri, Jul 10, 2020 at 07:56:43PM +0200, Sam Ravnborg wrote:
> Hi Suraj.
> 
> On Tue, Jul 07, 2020 at 10:04:14PM +0530, Suraj Upadhyay wrote:
> > 
> > This patchset converts logging to drm_* functions in drm core.
> > 
> > The following functions have been converted to their respective
> > DRM alternatives :
> > dev_info()      --> drm_info()
> > dev_err()       --> drm_err()
> > dev_warn()      --> drm_warn()
> > dev_err_once()  --> drm_err_once().
> 
> I would prefer that DRM_* logging in the same files are converted in the
> same patch. So we have one logging conversion patch for each file you
> touches and that we do not need to re-vist the files later to change
> another set of logging functions.

Agreed.

> If possible WARN_* should also be converted to drm_WARN_*
> If patch is too large, then split them up but again lets have all
> logging updated when we touch a file.
> 
> Care to take a look at this approach?
>

Hii,
	The problem with WARN_* macros is that they are used without any
drm device context. For example [this use here](https://cgit.freedesktop.org/drm/drm-misc/tree/drivers/gpu/drm/drm_edid.c#n1667) in drm_edid.c,
doesn't have a drm device context and only has one argument (namely !raw_edid).
There are many more such use cases.

And also there were cases where dev_* logging functions didn't have any
drm_device context.

I would be very glad, if we came up with a possible solution to this
problem. I think we should develop drm_* logging APIs which could print
contextless logs (which would possibly be midlyering) or give every situation a context.

> Also please consider if coccinelle can make this job easier.
> There is a lot of files...

I totally agree with you. I will remember this next time.

But here, in this patchset I have tried to convert all possible
cases of conversion, i.e. I have changed logging wherever there was a
drm_device context.

Thanks.

> 	Sam
> 
> > 
> > Suraj Upadhyay (4):
> >   drm: mipi-dsi: Convert logging to drm_* functions.
> >   drm: mipi-dbi: Convert logging to drm_* functions.
> >   drm: edid: Convert logging to drm_* functions.
> >   drm: fb-helper: Convert logging to drm_* functions.
> > 
> >  drivers/gpu/drm/drm_edid.c      |  7 +++----
> >  drivers/gpu/drm/drm_fb_helper.c |  2 +-
> >  drivers/gpu/drm/drm_mipi_dbi.c  |  4 ++--
> >  drivers/gpu/drm/drm_mipi_dsi.c  | 15 +++++++--------
> >  4 files changed, 13 insertions(+), 15 deletions(-)
> > 
> > -- 
> > 2.17.1
> > 
> > 
> 
> 
> 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@...ts.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

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