linux-kernel - Re: [PATCH v2 17/26] drm: rcar-du: Remove #ifdef guards for PM related functions

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Message-ID: <bc6ece2831188a6041a2956f5efb6a7c3a5b4a18.camel@crapouillou.net>
Date:   Tue, 29 Nov 2022 21:05:49 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v2 17/26] drm: rcar-du: Remove #ifdef guards for PM
 related functions

Hi Laurent,

Le mardi 29 novembre 2022 à 21:43 +0200, Laurent Pinchart a écrit :
> Hi Paul,
> 
> Thank you for the patch.
> 
> On Tue, Nov 29, 2022 at 07:19:33PM +0000, Paul Cercueil wrote:
> > Use the DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() macros to
> > handle
> > the .suspend/.resume callbacks.
> > 
> > These macros allow the suspend and resume functions to be
> > automatically
> > dropped by the compiler when CONFIG_SUSPEND is disabled, without
> > having
> > to use #ifdef guards.
> > 
> > This has the advantage of always compiling these functions in,
> > independently of any Kconfig option. Thanks to that, bugs and other
> > regressions are subsequently easier to catch.
> > 
> > Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> > Reviewed-by: Kieran Bingham
> > <kieran.bingham+renesas@...asonboard.com>
> 
> Reviewed-by: Laurent Pinchart
> <laurent.pinchart+renesas@...asonboard.com>
> 
> Will you get this whole series merged in one go in drm-misc, or do
> you
> expect me to take this patch in my tree ? I'd prefer the first option
> if
> possible (less work for me :-)).

I actually answered that in my cover letter ;)

However I assumed it had to go through drm-next, if you think it can go
through drm-misc-next, I can apply it myself.

Cheers,
-Paul

> 
> > ---
> > Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
> > Cc: linux-renesas-soc@...r.kernel.org
> > ---
> >  drivers/gpu/drm/rcar-du/rcar_du_drv.c | 9 +++------
> >  1 file changed, 3 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > index d003e8d9e7a2..eeec1e02446f 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > @@ -599,7 +599,6 @@ static const struct drm_driver rcar_du_driver =
> > {
> >   * Power management
> >   */
> >  
> > -#ifdef CONFIG_PM_SLEEP
> >  static int rcar_du_pm_suspend(struct device *dev)
> >  {
> >         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
> > @@ -613,11 +612,9 @@ static int rcar_du_pm_resume(struct device
> > *dev)
> >  
> >         return drm_mode_config_helper_resume(&rcdu->ddev);
> >  }
> > -#endif
> >  
> > -static const struct dev_pm_ops rcar_du_pm_ops = {
> > -       SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend,
> > rcar_du_pm_resume)
> > -};
> > +static DEFINE_SIMPLE_DEV_PM_OPS(rcar_du_pm_ops,
> > +                               rcar_du_pm_suspend,
> > rcar_du_pm_resume);
> >  
> >  /* ---------------------------------------------------------------
> > --------------
> >   * Platform driver
> > @@ -712,7 +709,7 @@ static struct platform_driver
> > rcar_du_platform_driver = {
> >         .shutdown       = rcar_du_shutdown,
> >         .driver         = {
> >                 .name   = "rcar-du",
> > -               .pm     = &rcar_du_pm_ops,
> > +               .pm     = pm_sleep_ptr(&rcar_du_pm_ops),
> >                 .of_match_table = rcar_du_of_table,
> >         },
> >  };
>