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

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Date:   Tue, 24 Jul 2018 15:24:58 +0900
From:   Inki Dae <inki.dae@...sung.com>
To:     Souptick Joarder <jrdr.linux@...il.com>, jy0922.shim@...sung.com,
        sw0312.kim@...sung.com, kyungmin.park@...sung.com,
        airlied@...ux.ie, kgene@...nel.org, krzk@...nel.org,
        ajitn.linux@...il.com
CC:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpu/drm/exynos: Convert
 drm_atomic_helper_suspend/resume()

Hi,

2018년 07월 19일 05:49에 Souptick Joarder 이(가) 쓴 글:
> convert drm_atomic_helper_suspend/resume() to use
> drm_mode_config_helper_suspend/resume().
> 
> exynos_drm_fbdev_suspend/resume can be removed
> as drm_mode_config_helper_suspend/resume has
> implement the same in generic way.
> 
> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> Signed-off-by: Ajit Negi <ajitn.linux@...il.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_drv.c   | 32 ++++++++++---------------------
>  drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 17 ----------------
>  drivers/gpu/drm/exynos/exynos_drm_fbdev.h | 10 ----------
>  3 files changed, 10 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> index a81b4a5..1996ff7 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> @@ -151,39 +151,27 @@ static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
>  static int exynos_drm_suspend(struct device *dev)
>  {
>  	struct drm_device *drm_dev = dev_get_drvdata(dev);
> -	struct exynos_drm_private *private;
> +	int ret = 0;
>  
> -	if (pm_runtime_suspended(dev) || !drm_dev)
> -		return 0;

You removes '!drm_dev' not related to this patch.

> +	if (pm_runtime_suspended(dev))
> +		return ret;
>  
> -	private = drm_dev->dev_private;
> +	ret = drm_mode_config_helper_suspend(drm_dev);

Just return drm_mode_config_helper_suspend(drm_dev);

>  
> -	drm_kms_helper_poll_disable(drm_dev);
> -	exynos_drm_fbdev_suspend(drm_dev);
> -	private->suspend_state = drm_atomic_helper_suspend(drm_dev);
> -	if (IS_ERR(private->suspend_state)) {
> -		exynos_drm_fbdev_resume(drm_dev);
> -		drm_kms_helper_poll_enable(drm_dev);
> -		return PTR_ERR(private->suspend_state);
> -	}
> -
> -	return 0;
> +	return ret;
>  }
>  
>  static int exynos_drm_resume(struct device *dev)
>  {
>  	struct drm_device *drm_dev = dev_get_drvdata(dev);
> -	struct exynos_drm_private *private;
> +	int ret = 0;
>  
> -	if (pm_runtime_suspended(dev) || !drm_dev)
> -		return 0;
> +	if (pm_runtime_suspended(dev))
> +		return ret;

Ditto. You removes '!drm_dev' not related to this patch.

>  
> -	private = drm_dev->dev_private;
> -	drm_atomic_helper_resume(drm_dev, private->suspend_state);
> -	exynos_drm_fbdev_resume(drm_dev);
> -	drm_kms_helper_poll_enable(drm_dev);
> +	ret = drm_mode_config_helper_resume(drm_dev);

Ditto. return drm_mode_config_helper_resume(drm_dev);

With this patch, you could remove 'int ret' declaration including one from exynos_drm_suspend.

Thanks,
Inki Dae

>  
> -	return 0;
> +	return ret;
>  }
>  #endif
>  
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> index 132dd52..918dd2c 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> @@ -270,20 +270,3 @@ void exynos_drm_fbdev_fini(struct drm_device *dev)
>  	private->fb_helper = NULL;
>  }
>  
> -void exynos_drm_fbdev_suspend(struct drm_device *dev)
> -{
> -	struct exynos_drm_private *private = dev->dev_private;
> -
> -	console_lock();
> -	drm_fb_helper_set_suspend(private->fb_helper, 1);
> -	console_unlock();
> -}
> -
> -void exynos_drm_fbdev_resume(struct drm_device *dev)
> -{
> -	struct exynos_drm_private *private = dev->dev_private;
> -
> -	console_lock();
> -	drm_fb_helper_set_suspend(private->fb_helper, 0);
> -	console_unlock();
> -}
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
> index b338472..6840b6a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
> @@ -19,8 +19,6 @@
>  
>  int exynos_drm_fbdev_init(struct drm_device *dev);
>  void exynos_drm_fbdev_fini(struct drm_device *dev);
> -void exynos_drm_fbdev_suspend(struct drm_device *drm);
> -void exynos_drm_fbdev_resume(struct drm_device *drm);
>  
>  #else
>  
> @@ -39,14 +37,6 @@ static inline void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
>  
>  #define exynos_drm_output_poll_changed (NULL)
>  
> -static inline void exynos_drm_fbdev_suspend(struct drm_device *drm)
> -{
> -}
> -
> -static inline void exynos_drm_fbdev_resume(struct drm_device *drm)
> -{
> -}
> -
>  #endif
>  
>  #endif
>