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From:   Souptick Joarder <jrdr.linux@gmail.com>
Date:   Thu, 2 Aug 2018 15:25:24 +0530
Message-ID: <CAFqt6zYUN3XRsbhAgp8Lne9j1KTr5Ub0P+WrtLwOOfFPFRHFsA@mail.gmail.com>
Subject: Re: [PATCH] drm: Convert drm_atomic_helper_suspend/resume()
To:     Liviu Dudau <liviu.dudau@arm.com>
Cc:     Brian Starkey <brian.starkey@arm.com>, malidp@foss.arm.com,
        airlied@linux.ie, Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <seanpaul@chromium.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Ajit Linux <ajitn.linux@gmail.com>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org
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On Wed, Aug 1, 2018 at 12:11 AM, Souptick Joarder <jrdr.linux@gmail.com> wr=
ote:
> On Tue, Jul 31, 2018 at 4:04 PM, Liviu Dudau <liviu.dudau@arm.com> wrote:
>> Hi Souptick,
>>
>> On Tue, Jul 31, 2018 at 12:31:37AM +0530, Souptick Joarder wrote:
>>> convert drm_atomic_helper_suspend/resume() to use
>>> drm_mode_config_helper_suspend/resume().
>>>
>>> With this conversion, drm_fbdev_cma_set_suspend_unlocked()
>>> will left with no consumer. So this function can be removed.
>>>
>>> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
>>> Signed-off-by: Ajit Negi <ajitn.linux@gmail.com>
>>> ---
>>>  drivers/gpu/drm/arm/hdlcd_drv.c       | 26 ++------------------------
>>>  drivers/gpu/drm/drm_fb_cma_helper.c   | 18 ------------------
>>>  drivers/gpu/drm/rcar-du/rcar_du_drv.c | 21 ++-------------------
>>>  include/drm/drm_fb_cma_helper.h       |  2 --
>>>  4 files changed, 4 insertions(+), 63 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlc=
d_drv.c
>>> index feaa8bc..4e617e0 100644
>>> --- a/drivers/gpu/drm/arm/hdlcd_drv.c
>>> +++ b/drivers/gpu/drm/arm/hdlcd_drv.c
>>> @@ -427,37 +427,15 @@ static int hdlcd_remove(struct platform_device *p=
dev)
>>>  static int __maybe_unused hdlcd_pm_suspend(struct device *dev)
>>>  {
>>>       struct drm_device *drm =3D dev_get_drvdata(dev);
>>> -     struct hdlcd_drm_private *hdlcd =3D drm ? drm->dev_private : NULL=
;
>>>
>>> -     if (!hdlcd)
>>> -             return 0;
>>> -
>>> -     drm_kms_helper_poll_disable(drm);
>>> -     drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 1);
>>> -
>>> -     hdlcd->state =3D drm_atomic_helper_suspend(drm);
>>> -     if (IS_ERR(hdlcd->state)) {
>>> -             drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
>>> -             drm_kms_helper_poll_enable(drm);
>>> -             return PTR_ERR(hdlcd->state);
>>> -     }
>>> -
>>> -     return 0;
>>> +     return drm_mode_config_helper_suspend(drm);
>>>  }
>>>
>>>  static int __maybe_unused hdlcd_pm_resume(struct device *dev)
>>>  {
>>>       struct drm_device *drm =3D dev_get_drvdata(dev);
>>> -     struct hdlcd_drm_private *hdlcd =3D drm ? drm->dev_private : NULL=
;
>>> -
>>> -     if (!hdlcd)
>>> -             return 0;
>>>
>>> -     drm_atomic_helper_resume(drm, hdlcd->state);
>>> -     drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
>>> -     drm_kms_helper_poll_enable(drm);
>>> -
>>> -     return 0;
>>> +     return drm_mode_config_helper_resume(drm);
>>>  }
>>
>> This patch is similar to the one Noralf Tr=C3=B8nnes submitted, and his =
is
>> also cleaning up the state variable in hdlcd_drm_private. The patch has
>> been queued as commit f69d9686e5d9 in git://linux-arm.org/linux-ld.git
>> for-upstream/hdlcd and I will send a pull request today for it.
>>
>> Best regards,
>> Liviu
>
> unable to clone this repository.
> can you please post the patchwork link ?

Liviu, is commit f69d9686e5d9 in
git://linux-arm.org/linux-ld.gitfor-upstream/hdlcd
contains only changes in drivers/gpu/drm/arm/hdlcd_drv.c driver ??

>
>>
>>>
>>>  static SIMPLE_DEV_PM_OPS(hdlcd_pm_ops, hdlcd_pm_suspend, hdlcd_pm_resu=
me);
>>> diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_=
fb_cma_helper.c
>>> index 186d00a..f604a84 100644
>>> --- a/drivers/gpu/drm/drm_fb_cma_helper.c
>>> +++ b/drivers/gpu/drm/drm_fb_cma_helper.c
>>> @@ -529,21 +529,3 @@ void drm_fbdev_cma_set_suspend(struct drm_fbdev_cm=
a *fbdev_cma, bool state)
>>>               drm_fb_helper_set_suspend(&fbdev_cma->fb_helper, state);
>>>  }
>>>  EXPORT_SYMBOL(drm_fbdev_cma_set_suspend);
>>> -
>>> -/**
>>> - * drm_fbdev_cma_set_suspend_unlocked - wrapper around
>>> - *                                      drm_fb_helper_set_suspend_unlo=
cked
>>> - * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
>>> - * @state: desired state, zero to resume, non-zero to suspend
>>> - *
>>> - * Calls drm_fb_helper_set_suspend, which is a wrapper around
>>> - * fb_set_suspend implemented by fbdev core.
>>> - */
>>> -void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cm=
a,
>>> -                                     bool state)
>>> -{
>>> -     if (fbdev_cma)
>>> -             drm_fb_helper_set_suspend_unlocked(&fbdev_cma->fb_helper,
>>> -                                                state);
>>> -}
>>> -EXPORT_SYMBOL(drm_fbdev_cma_set_suspend_unlocked);
>>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rc=
ar-du/rcar_du_drv.c
>>> index 02aee6c..288220f 100644
>>> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
>>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
>>> @@ -357,32 +357,15 @@ static void rcar_du_lastclose(struct drm_device *=
dev)
>>>  static int rcar_du_pm_suspend(struct device *dev)
>>>  {
>>>       struct rcar_du_device *rcdu =3D dev_get_drvdata(dev);
>>> -     struct drm_atomic_state *state;
>>>
>>> -     drm_kms_helper_poll_disable(rcdu->ddev);
>>> -     drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
>>> -
>>> -     state =3D drm_atomic_helper_suspend(rcdu->ddev);
>>> -     if (IS_ERR(state)) {
>>> -             drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
>>> -             drm_kms_helper_poll_enable(rcdu->ddev);
>>> -             return PTR_ERR(state);
>>> -     }
>>> -
>>> -     rcdu->suspend_state =3D state;
>>> -
>>> -     return 0;
>>> +     return drm_mode_config_helper_suspend(rcdu->ddev);
>>>  }
>>>
>>>  static int rcar_du_pm_resume(struct device *dev)
>>>  {
>>>       struct rcar_du_device *rcdu =3D dev_get_drvdata(dev);
>>>
>>> -     drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
>>> -     drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
>>> -     drm_kms_helper_poll_enable(rcdu->ddev);
>>> -
>>> -     return 0;
>>> +     return drm_mode_config_helper_resume(rcdu->ddev);
>>>  }
>>>  #endif
>>>
>>> diff --git a/include/drm/drm_fb_cma_helper.h b/include/drm/drm_fb_cma_h=
elper.h
>>> index d532f88a..15c4569 100644
>>> --- a/include/drm/drm_fb_cma_helper.h
>>> +++ b/include/drm/drm_fb_cma_helper.h
>>> @@ -33,8 +33,6 @@ struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_d=
evice *dev,
>>>  void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
>>>  void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
>>>  void drm_fbdev_cma_set_suspend(struct drm_fbdev_cma *fbdev_cma, bool s=
tate);
>>> -void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cm=
a,
>>> -                                     bool state);
>>>
>>>  struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuff=
er *fb,
>>>       unsigned int plane);
>>> --
>>> 1.9.1
>>>
>>
>> --
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>> | I would like to |
>> | fix the world,  |
>> | but they're not |
>> | giving me the   |
>>  \ source code!  /
>>   ---------------
>>     =C2=AF\_(=E3=83=84)_/=C2=AF