linux-kernel - Re: [PATCH] drm/imx: Convert drm_atomic_helper

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Message-ID: <CAFqt6zZOM8oy9bd=NWRJfverev5UFmHm7j9UR9Z780anEVJDyQ@mail.gmail.com>
Date:   Tue, 31 Jul 2018 14:53:25 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     airlied@...ux.ie, Leonard Crestez <leonard.crestez@....com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Ajit Linux <ajitn.linux@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH] drm/imx: Convert drm_atomic_helper_suspend/resume()

On Tue, Jul 31, 2018 at 1:59 PM, Philipp Zabel <p.zabel@...gutronix.de> wrote:
> Hi Souptick,
>
> On Sat, 2018-07-28 at 18:35 +0530, Souptick Joarder wrote:
>> convert drm_atomic_helper_suspend/resume() to use
>> drm_mode_config_helper_suspend/resume().
>>
>> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
>> Signed-off-by: Ajit Negi <ajitn.linux@...il.com>
>
> Leonard pointed out earlier [1] that this makes the struct
> imx_drm_device superfluous, since imxdrm->state is the only remaining
> field and here you are removing its use. Could you remove struct
> imx_drm_device as well?

Sure, Will remove it in v2.
>
> [1] https://patchwork.kernel.org/patch/10531473/
>
> regards
> Philipp
>
>> ---
>>  drivers/gpu/drm/imx/imx-drm-core.c | 26 ++------------------------
>>  1 file changed, 2 insertions(+), 24 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
>> index 1d053bb..cdd83ea 100644
>> --- a/drivers/gpu/drm/imx/imx-drm-core.c
>> +++ b/drivers/gpu/drm/imx/imx-drm-core.c
>> @@ -355,37 +355,15 @@ static int imx_drm_platform_remove(struct platform_device *pdev)
>>  static int imx_drm_suspend(struct device *dev)
>>  {
>>       struct drm_device *drm_dev = dev_get_drvdata(dev);
>> -     struct imx_drm_device *imxdrm;
>> -
>> -     /* The drm_dev is NULL before .load hook is called */
>> -     if (drm_dev == NULL)
>> -             return 0;
>> -
>> -     drm_kms_helper_poll_disable(drm_dev);
>> -
>> -     imxdrm = drm_dev->dev_private;
>> -     imxdrm->state = drm_atomic_helper_suspend(drm_dev);
>> -     if (IS_ERR(imxdrm->state)) {
>> -             drm_kms_helper_poll_enable(drm_dev);
>> -             return PTR_ERR(imxdrm->state);
>> -     }
>>
>> -     return 0;
>> +     return drm_mode_config_helper_suspend(drm_dev);
>>  }
>>
>>  static int imx_drm_resume(struct device *dev)
>>  {
>>       struct drm_device *drm_dev = dev_get_drvdata(dev);
>> -     struct imx_drm_device *imx_drm;
>> -
>> -     if (drm_dev == NULL)
>> -             return 0;
>>
>> -     imx_drm = drm_dev->dev_private;
>> -     drm_atomic_helper_resume(drm_dev, imx_drm->state);
>> -     drm_kms_helper_poll_enable(drm_dev);
>> -
>> -     return 0;
>> +     return drm_mode_config_helper_resume(drm_dev);
>>  }
>>  #endif
>>